| ... | ... | @@ -1,131 +1,179 @@ |
| 1 | 1 | const Coff = @This(); |
| 2 | 2 | |
| 3 | 3 | const std = @import("std"); |
| 4 | const build_options = @import("build_options"); |
| 4 | 5 | const builtin = @import("builtin"); |
| 5 | | const log = std.log.scoped(.link); |
| 6 | | const Allocator = std.mem.Allocator; |
| 7 | 6 | const assert = std.debug.assert; |
| 8 | | const fs = std.fs; |
| 9 | | const allocPrint = std.fmt.allocPrint; |
| 7 | const coff = std.coff; |
| 8 | const fmt = std.fmt; |
| 9 | const log = std.log.scoped(.link); |
| 10 | const math = std.math; |
| 10 | 11 | const mem = std.mem; |
| 11 | 12 | |
| 12 | | const lldMain = @import("../main.zig").lldMain; |
| 13 | | const trace = @import("../tracy.zig").trace; |
| 14 | | const Module = @import("../Module.zig"); |
| 15 | | const Compilation = @import("../Compilation.zig"); |
| 13 | const Allocator = std.mem.Allocator; |
| 14 | |
| 16 | 15 | const codegen = @import("../codegen.zig"); |
| 17 | 16 | const link = @import("../link.zig"); |
| 18 | | const build_options = @import("build_options"); |
| 19 | | const Cache = @import("../Cache.zig"); |
| 20 | | const mingw = @import("../mingw.zig"); |
| 17 | const lld = @import("Coff/lld.zig"); |
| 18 | const trace = @import("../tracy.zig").trace; |
| 19 | |
| 21 | 20 | const Air = @import("../Air.zig"); |
| 21 | pub const Atom = @import("Coff/Atom.zig"); |
| 22 | const Compilation = @import("../Compilation.zig"); |
| 22 | 23 | const Liveness = @import("../Liveness.zig"); |
| 23 | 24 | const LlvmObject = @import("../codegen/llvm.zig").Object; |
| 25 | const Module = @import("../Module.zig"); |
| 26 | const Object = @import("Coff/Object.zig"); |
| 27 | const StringTable = @import("strtab.zig").StringTable; |
| 24 | 28 | const TypedValue = @import("../TypedValue.zig"); |
| 25 | 29 | |
| 26 | | const allocation_padding = 4 / 3; |
| 27 | | const minimum_text_block_size = 64 * allocation_padding; |
| 28 | | |
| 29 | | const section_alignment = 4096; |
| 30 | | const file_alignment = 512; |
| 31 | | const default_image_base = 0x400_000; |
| 32 | | const section_table_size = 2 * 40; |
| 33 | | comptime { |
| 34 | | assert(mem.isAligned(default_image_base, section_alignment)); |
| 35 | | } |
| 36 | | |
| 37 | 30 | pub const base_tag: link.File.Tag = .coff; |
| 38 | 31 | |
| 39 | 32 | const msdos_stub = @embedFile("msdos-stub.bin"); |
| 33 | const N_DATA_DIRS: u5 = 16; |
| 40 | 34 | |
| 41 | 35 | /// If this is not null, an object file is created by LLVM and linked with LLD afterwards. |
| 42 | 36 | llvm_object: ?*LlvmObject = null, |
| 43 | 37 | |
| 44 | 38 | base: link.File, |
| 45 | | ptr_width: PtrWidth, |
| 46 | 39 | error_flags: link.File.ErrorFlags = .{}, |
| 47 | 40 | |
| 48 | | text_block_free_list: std.ArrayListUnmanaged(*TextBlock) = .{}, |
| 49 | | last_text_block: ?*TextBlock = null, |
| 50 | | |
| 51 | | /// Section table file pointer. |
| 52 | | section_table_offset: u32 = 0, |
| 53 | | /// Section data file pointer. |
| 54 | | section_data_offset: u32 = 0, |
| 55 | | /// Optional header file pointer. |
| 56 | | optional_header_offset: u32 = 0, |
| 57 | | |
| 58 | | /// Absolute virtual address of the offset table when the executable is loaded in memory. |
| 59 | | offset_table_virtual_address: u32 = 0, |
| 60 | | /// Current size of the offset table on disk, must be a multiple of `file_alignment` |
| 61 | | offset_table_size: u32 = 0, |
| 62 | | /// Contains absolute virtual addresses |
| 63 | | offset_table: std.ArrayListUnmanaged(u64) = .{}, |
| 64 | | /// Free list of offset table indices |
| 65 | | offset_table_free_list: std.ArrayListUnmanaged(u32) = .{}, |
| 41 | ptr_width: PtrWidth, |
| 42 | page_size: u32, |
| 43 | |
| 44 | objects: std.ArrayListUnmanaged(Object) = .{}, |
| 45 | |
| 46 | sections: std.MultiArrayList(Section) = .{}, |
| 47 | data_directories: [N_DATA_DIRS]coff.ImageDataDirectory, |
| 48 | |
| 49 | text_section_index: ?u16 = null, |
| 50 | got_section_index: ?u16 = null, |
| 51 | rdata_section_index: ?u16 = null, |
| 52 | data_section_index: ?u16 = null, |
| 53 | |
| 54 | locals: std.ArrayListUnmanaged(coff.Symbol) = .{}, |
| 55 | globals: std.StringArrayHashMapUnmanaged(SymbolWithLoc) = .{}, |
| 56 | |
| 57 | locals_free_list: std.ArrayListUnmanaged(u32) = .{}, |
| 58 | |
| 59 | strtab: StringTable(.strtab) = .{}, |
| 60 | strtab_offset: ?u32 = null, |
| 61 | |
| 62 | got_entries: std.AutoArrayHashMapUnmanaged(SymbolWithLoc, u32) = .{}, |
| 63 | got_entries_free_list: std.ArrayListUnmanaged(u32) = .{}, |
| 66 | 64 | |
| 67 | 65 | /// Virtual address of the entry point procedure relative to image base. |
| 68 | 66 | entry_addr: ?u32 = null, |
| 69 | 67 | |
| 70 | | /// Absolute virtual address of the text section when the executable is loaded in memory. |
| 71 | | text_section_virtual_address: u32 = 0, |
| 72 | | /// Current size of the `.text` section on disk, must be a multiple of `file_alignment` |
| 73 | | text_section_size: u32 = 0, |
| 68 | /// Table of Decls that are currently alive. |
| 69 | /// We store them here so that we can properly dispose of any allocated |
| 70 | /// memory within the atom in the incremental linker. |
| 71 | /// TODO consolidate this. |
| 72 | decls: std.AutoHashMapUnmanaged(Module.Decl.Index, ?u16) = .{}, |
| 73 | |
| 74 | /// List of atoms that are either synthetic or map directly to the Zig source program. |
| 75 | managed_atoms: std.ArrayListUnmanaged(*Atom) = .{}, |
| 76 | |
| 77 | /// Table of atoms indexed by the symbol index. |
| 78 | atom_by_index_table: std.AutoHashMapUnmanaged(u32, *Atom) = .{}, |
| 79 | |
| 80 | /// Table of unnamed constants associated with a parent `Decl`. |
| 81 | /// We store them here so that we can free the constants whenever the `Decl` |
| 82 | /// needs updating or is freed. |
| 83 | /// |
| 84 | /// For example, |
| 85 | /// |
| 86 | /// ```zig |
| 87 | /// const Foo = struct{ |
| 88 | /// a: u8, |
| 89 | /// }; |
| 90 | /// |
| 91 | /// pub fn main() void { |
| 92 | /// var foo = Foo{ .a = 1 }; |
| 93 | /// _ = foo; |
| 94 | /// } |
| 95 | /// ``` |
| 96 | /// |
| 97 | /// value assigned to label `foo` is an unnamed constant belonging/associated |
| 98 | /// with `Decl` `main`, and lives as long as that `Decl`. |
| 99 | unnamed_const_atoms: UnnamedConstTable = .{}, |
| 100 | |
| 101 | /// A table of relocations indexed by the owning them `TextBlock`. |
| 102 | /// Note that once we refactor `TextBlock`'s lifetime and ownership rules, |
| 103 | /// this will be a table indexed by index into the list of Atoms. |
| 104 | relocs: RelocTable = .{}, |
| 105 | |
| 106 | pub const Reloc = struct { |
| 107 | @"type": enum { |
| 108 | got, |
| 109 | direct, |
| 110 | }, |
| 111 | target: SymbolWithLoc, |
| 112 | offset: u32, |
| 113 | addend: u32, |
| 114 | pcrel: bool, |
| 115 | length: u2, |
| 116 | prev_vaddr: u32, |
| 117 | }; |
| 74 | 118 | |
| 75 | | offset_table_size_dirty: bool = false, |
| 76 | | text_section_size_dirty: bool = false, |
| 77 | | /// This flag is set when the virtual size of the whole image file when loaded in memory has changed |
| 78 | | /// and needs to be updated in the optional header. |
| 79 | | size_of_image_dirty: bool = false, |
| 119 | const RelocTable = std.AutoHashMapUnmanaged(*Atom, std.ArrayListUnmanaged(Reloc)); |
| 120 | const UnnamedConstTable = std.AutoHashMapUnmanaged(Module.Decl.Index, std.ArrayListUnmanaged(*Atom)); |
| 121 | |
| 122 | const default_file_alignment: u16 = 0x200; |
| 123 | const default_image_base_dll: u64 = 0x10000000; |
| 124 | const default_image_base_exe: u64 = 0x400000; |
| 125 | const default_size_of_stack_reserve: u32 = 0x1000000; |
| 126 | const default_size_of_stack_commit: u32 = 0x1000; |
| 127 | const default_size_of_heap_reserve: u32 = 0x100000; |
| 128 | const default_size_of_heap_commit: u32 = 0x1000; |
| 129 | |
| 130 | const Section = struct { |
| 131 | header: coff.SectionHeader, |
| 132 | |
| 133 | last_atom: ?*Atom = null, |
| 134 | |
| 135 | /// A list of atoms that have surplus capacity. This list can have false |
| 136 | /// positives, as functions grow and shrink over time, only sometimes being added |
| 137 | /// or removed from the freelist. |
| 138 | /// |
| 139 | /// An atom has surplus capacity when its overcapacity value is greater than |
| 140 | /// padToIdeal(minimum_atom_size). That is, when it has so |
| 141 | /// much extra capacity, that we could fit a small new symbol in it, itself with |
| 142 | /// ideal_capacity or more. |
| 143 | /// |
| 144 | /// Ideal capacity is defined by size + (size / ideal_factor). |
| 145 | /// |
| 146 | /// Overcapacity is measured by actual_capacity - ideal_capacity. Note that |
| 147 | /// overcapacity can be negative. A simple way to have negative overcapacity is to |
| 148 | /// allocate a fresh atom, which will have ideal capacity, and then grow it |
| 149 | /// by 1 byte. It will then have -1 overcapacity. |
| 150 | free_list: std.ArrayListUnmanaged(*Atom) = .{}, |
| 151 | }; |
| 80 | 152 | |
| 81 | 153 | pub const PtrWidth = enum { p32, p64 }; |
| 154 | pub const SrcFn = void; |
| 82 | 155 | |
| 83 | | pub const TextBlock = struct { |
| 84 | | /// Offset of the code relative to the start of the text section |
| 85 | | text_offset: u32, |
| 86 | | /// Used size of the text block |
| 87 | | size: u32, |
| 88 | | /// This field is undefined for symbols with size = 0. |
| 89 | | offset_table_index: u32, |
| 90 | | /// Points to the previous and next neighbors, based on the `text_offset`. |
| 91 | | /// This can be used to find, for example, the capacity of this `TextBlock`. |
| 92 | | prev: ?*TextBlock, |
| 93 | | next: ?*TextBlock, |
| 94 | | |
| 95 | | pub const empty = TextBlock{ |
| 96 | | .text_offset = 0, |
| 97 | | .size = 0, |
| 98 | | .offset_table_index = undefined, |
| 99 | | .prev = null, |
| 100 | | .next = null, |
| 101 | | }; |
| 102 | | |
| 103 | | /// Returns how much room there is to grow in virtual address space. |
| 104 | | fn capacity(self: TextBlock) u64 { |
| 105 | | if (self.next) |next| { |
| 106 | | return next.text_offset - self.text_offset; |
| 107 | | } |
| 108 | | // This is the last block, the capacity is only limited by the address space. |
| 109 | | return std.math.maxInt(u32) - self.text_offset; |
| 110 | | } |
| 156 | pub const Export = struct { |
| 157 | sym_index: ?u32 = null, |
| 158 | }; |
| 111 | 159 | |
| 112 | | fn freeListEligible(self: TextBlock) bool { |
| 113 | | // No need to keep a free list node for the last block. |
| 114 | | const next = self.next orelse return false; |
| 115 | | const cap = next.text_offset - self.text_offset; |
| 116 | | const ideal_cap = self.size * allocation_padding; |
| 117 | | if (cap <= ideal_cap) return false; |
| 118 | | const surplus = cap - ideal_cap; |
| 119 | | return surplus >= minimum_text_block_size; |
| 120 | | } |
| 160 | pub const SymbolWithLoc = struct { |
| 161 | // Index into the respective symbol table. |
| 162 | sym_index: u32, |
| 121 | 163 | |
| 122 | | /// Absolute virtual address of the text block when the file is loaded in memory. |
| 123 | | fn getVAddr(self: TextBlock, coff: Coff) u32 { |
| 124 | | return coff.text_section_virtual_address + self.text_offset; |
| 125 | | } |
| 164 | // null means it's a synthetic global or Zig source. |
| 165 | file: ?u32 = null, |
| 126 | 166 | }; |
| 127 | 167 | |
| 128 | | pub const SrcFn = void; |
| 168 | /// When allocating, the ideal_capacity is calculated by |
| 169 | /// actual_capacity + (actual_capacity / ideal_factor) |
| 170 | const ideal_factor = 3; |
| 171 | |
| 172 | /// In order for a slice of bytes to be considered eligible to keep metadata pointing at |
| 173 | /// it as a possible place to put new symbols, it must have enough room for this many bytes |
| 174 | /// (plus extra for reserved capacity). |
| 175 | const minimum_text_block_size = 64; |
| 176 | pub const min_text_capacity = padToIdeal(minimum_text_block_size); |
| 129 | 177 | |
| 130 | 178 | pub fn openPath(allocator: Allocator, sub_path: []const u8, options: link.Options) !*Coff { |
| 131 | 179 | assert(options.target.ofmt == .coff); |
| ... | ... | @@ -144,257 +192,7 @@ pub fn openPath(allocator: Allocator, sub_path: []const u8, options: link.Option |
| 144 | 192 | }); |
| 145 | 193 | self.base.file = file; |
| 146 | 194 | |
| 147 | | // TODO Write object specific relocations, COFF symbol table, then enable object file output. |
| 148 | | switch (options.output_mode) { |
| 149 | | .Exe => {}, |
| 150 | | .Obj => return error.TODOImplementWritingObjFiles, |
| 151 | | .Lib => return error.TODOImplementWritingLibFiles, |
| 152 | | } |
| 153 | | |
| 154 | | var coff_file_header_offset: u32 = 0; |
| 155 | | if (options.output_mode == .Exe) { |
| 156 | | // Write the MS-DOS stub and the PE signature |
| 157 | | try self.base.file.?.pwriteAll(msdos_stub ++ "PE\x00\x00", 0); |
| 158 | | coff_file_header_offset = msdos_stub.len + 4; |
| 159 | | } |
| 160 | | |
| 161 | | // COFF file header |
| 162 | | const data_directory_count = 0; |
| 163 | | var hdr_data: [112 + data_directory_count * 8 + section_table_size]u8 = undefined; |
| 164 | | var index: usize = 0; |
| 165 | | |
| 166 | | const machine = self.base.options.target.cpu.arch.toCoffMachine(); |
| 167 | | if (machine == .Unknown) { |
| 168 | | return error.UnsupportedCOFFArchitecture; |
| 169 | | } |
| 170 | | mem.writeIntLittle(u16, hdr_data[0..2], @enumToInt(machine)); |
| 171 | | index += 2; |
| 172 | | |
| 173 | | // Number of sections (we only use .got, .text) |
| 174 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 2); |
| 175 | | index += 2; |
| 176 | | // TimeDateStamp (u32), PointerToSymbolTable (u32), NumberOfSymbols (u32) |
| 177 | | mem.set(u8, hdr_data[index..][0..12], 0); |
| 178 | | index += 12; |
| 179 | | |
| 180 | | const optional_header_size = switch (options.output_mode) { |
| 181 | | .Exe => data_directory_count * 8 + switch (self.ptr_width) { |
| 182 | | .p32 => @as(u16, 96), |
| 183 | | .p64 => 112, |
| 184 | | }, |
| 185 | | else => 0, |
| 186 | | }; |
| 187 | | |
| 188 | | const section_table_offset = coff_file_header_offset + 20 + optional_header_size; |
| 189 | | const default_offset_table_size = file_alignment; |
| 190 | | const default_size_of_code = 0; |
| 191 | | |
| 192 | | self.section_data_offset = mem.alignForwardGeneric(u32, self.section_table_offset + section_table_size, file_alignment); |
| 193 | | const section_data_relative_virtual_address = mem.alignForwardGeneric(u32, self.section_table_offset + section_table_size, section_alignment); |
| 194 | | self.offset_table_virtual_address = default_image_base + section_data_relative_virtual_address; |
| 195 | | self.offset_table_size = default_offset_table_size; |
| 196 | | self.section_table_offset = section_table_offset; |
| 197 | | self.text_section_virtual_address = default_image_base + section_data_relative_virtual_address + section_alignment; |
| 198 | | self.text_section_size = default_size_of_code; |
| 199 | | |
| 200 | | // Size of file when loaded in memory |
| 201 | | const size_of_image = mem.alignForwardGeneric(u32, self.text_section_virtual_address - default_image_base + default_size_of_code, section_alignment); |
| 202 | | |
| 203 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], optional_header_size); |
| 204 | | index += 2; |
| 205 | | |
| 206 | | // Characteristics |
| 207 | | var characteristics: std.coff.CoffHeaderFlags = .{ |
| 208 | | .DEBUG_STRIPPED = 1, // TODO remove debug info stripped flag when necessary |
| 209 | | .RELOCS_STRIPPED = 1, |
| 210 | | }; |
| 211 | | if (options.output_mode == .Exe) { |
| 212 | | characteristics.EXECUTABLE_IMAGE = 1; |
| 213 | | } |
| 214 | | switch (self.ptr_width) { |
| 215 | | .p32 => characteristics.@"32BIT_MACHINE" = 1, |
| 216 | | .p64 => characteristics.LARGE_ADDRESS_AWARE = 1, |
| 217 | | } |
| 218 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], @bitCast(u16, characteristics)); |
| 219 | | index += 2; |
| 220 | | |
| 221 | | assert(index == 20); |
| 222 | | try self.base.file.?.pwriteAll(hdr_data[0..index], coff_file_header_offset); |
| 223 | | |
| 224 | | if (options.output_mode == .Exe) { |
| 225 | | self.optional_header_offset = coff_file_header_offset + 20; |
| 226 | | // Optional header |
| 227 | | index = 0; |
| 228 | | mem.writeIntLittle(u16, hdr_data[0..2], switch (self.ptr_width) { |
| 229 | | .p32 => @as(u16, 0x10b), |
| 230 | | .p64 => 0x20b, |
| 231 | | }); |
| 232 | | index += 2; |
| 233 | | |
| 234 | | // Linker version (u8 + u8) |
| 235 | | mem.set(u8, hdr_data[index..][0..2], 0); |
| 236 | | index += 2; |
| 237 | | |
| 238 | | // SizeOfCode (UNUSED, u32), SizeOfInitializedData (u32), SizeOfUninitializedData (u32), AddressOfEntryPoint (u32), BaseOfCode (UNUSED, u32) |
| 239 | | mem.set(u8, hdr_data[index..][0..20], 0); |
| 240 | | index += 20; |
| 241 | | |
| 242 | | if (self.ptr_width == .p32) { |
| 243 | | // Base of data relative to the image base (UNUSED) |
| 244 | | mem.set(u8, hdr_data[index..][0..4], 0); |
| 245 | | index += 4; |
| 246 | | |
| 247 | | // Image base address |
| 248 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], default_image_base); |
| 249 | | index += 4; |
| 250 | | } else { |
| 251 | | // Image base address |
| 252 | | mem.writeIntLittle(u64, hdr_data[index..][0..8], default_image_base); |
| 253 | | index += 8; |
| 254 | | } |
| 255 | | |
| 256 | | // Section alignment |
| 257 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], section_alignment); |
| 258 | | index += 4; |
| 259 | | // File alignment |
| 260 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], file_alignment); |
| 261 | | index += 4; |
| 262 | | // Required OS version, 6.0 is vista |
| 263 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 6); |
| 264 | | index += 2; |
| 265 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 0); |
| 266 | | index += 2; |
| 267 | | // Image version |
| 268 | | mem.set(u8, hdr_data[index..][0..4], 0); |
| 269 | | index += 4; |
| 270 | | // Required subsystem version, same as OS version |
| 271 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 6); |
| 272 | | index += 2; |
| 273 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 0); |
| 274 | | index += 2; |
| 275 | | // Reserved zeroes (u32) |
| 276 | | mem.set(u8, hdr_data[index..][0..4], 0); |
| 277 | | index += 4; |
| 278 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], size_of_image); |
| 279 | | index += 4; |
| 280 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], self.section_data_offset); |
| 281 | | index += 4; |
| 282 | | // CheckSum (u32) |
| 283 | | mem.set(u8, hdr_data[index..][0..4], 0); |
| 284 | | index += 4; |
| 285 | | // Subsystem, TODO: Let users specify the subsystem, always CUI for now |
| 286 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 3); |
| 287 | | index += 2; |
| 288 | | // DLL characteristics |
| 289 | | mem.writeIntLittle(u16, hdr_data[index..][0..2], 0x0); |
| 290 | | index += 2; |
| 291 | | |
| 292 | | switch (self.ptr_width) { |
| 293 | | .p32 => { |
| 294 | | // Size of stack reserve + commit |
| 295 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], 0x1_000_000); |
| 296 | | index += 4; |
| 297 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], 0x1_000); |
| 298 | | index += 4; |
| 299 | | // Size of heap reserve + commit |
| 300 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], 0x100_000); |
| 301 | | index += 4; |
| 302 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], 0x1_000); |
| 303 | | index += 4; |
| 304 | | }, |
| 305 | | .p64 => { |
| 306 | | // Size of stack reserve + commit |
| 307 | | mem.writeIntLittle(u64, hdr_data[index..][0..8], 0x1_000_000); |
| 308 | | index += 8; |
| 309 | | mem.writeIntLittle(u64, hdr_data[index..][0..8], 0x1_000); |
| 310 | | index += 8; |
| 311 | | // Size of heap reserve + commit |
| 312 | | mem.writeIntLittle(u64, hdr_data[index..][0..8], 0x100_000); |
| 313 | | index += 8; |
| 314 | | mem.writeIntLittle(u64, hdr_data[index..][0..8], 0x1_000); |
| 315 | | index += 8; |
| 316 | | }, |
| 317 | | } |
| 318 | | |
| 319 | | // Reserved zeroes |
| 320 | | mem.set(u8, hdr_data[index..][0..4], 0); |
| 321 | | index += 4; |
| 322 | | |
| 323 | | // Number of data directories |
| 324 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], data_directory_count); |
| 325 | | index += 4; |
| 326 | | // Initialize data directories to zero |
| 327 | | mem.set(u8, hdr_data[index..][0 .. data_directory_count * 8], 0); |
| 328 | | index += data_directory_count * 8; |
| 329 | | |
| 330 | | assert(index == optional_header_size); |
| 331 | | } |
| 332 | | |
| 333 | | // Write section table. |
| 334 | | // First, the .got section |
| 335 | | hdr_data[index..][0..8].* = ".got\x00\x00\x00\x00".*; |
| 336 | | index += 8; |
| 337 | | if (options.output_mode == .Exe) { |
| 338 | | // Virtual size (u32) |
| 339 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], default_offset_table_size); |
| 340 | | index += 4; |
| 341 | | // Virtual address (u32) |
| 342 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], self.offset_table_virtual_address - default_image_base); |
| 343 | | index += 4; |
| 344 | | } else { |
| 345 | | mem.set(u8, hdr_data[index..][0..8], 0); |
| 346 | | index += 8; |
| 347 | | } |
| 348 | | // Size of raw data (u32) |
| 349 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], default_offset_table_size); |
| 350 | | index += 4; |
| 351 | | // File pointer to the start of the section |
| 352 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], self.section_data_offset); |
| 353 | | index += 4; |
| 354 | | // Pointer to relocations (u32), PointerToLinenumbers (u32), NumberOfRelocations (u16), NumberOfLinenumbers (u16) |
| 355 | | mem.set(u8, hdr_data[index..][0..12], 0); |
| 356 | | index += 12; |
| 357 | | // Section flags |
| 358 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], @bitCast(u32, std.coff.SectionHeaderFlags{ |
| 359 | | .CNT_INITIALIZED_DATA = 1, |
| 360 | | .MEM_READ = 1, |
| 361 | | })); |
| 362 | | index += 4; |
| 363 | | // Then, the .text section |
| 364 | | hdr_data[index..][0..8].* = ".text\x00\x00\x00".*; |
| 365 | | index += 8; |
| 366 | | if (options.output_mode == .Exe) { |
| 367 | | // Virtual size (u32) |
| 368 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], default_size_of_code); |
| 369 | | index += 4; |
| 370 | | // Virtual address (u32) |
| 371 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], self.text_section_virtual_address - default_image_base); |
| 372 | | index += 4; |
| 373 | | } else { |
| 374 | | mem.set(u8, hdr_data[index..][0..8], 0); |
| 375 | | index += 8; |
| 376 | | } |
| 377 | | // Size of raw data (u32) |
| 378 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], default_size_of_code); |
| 379 | | index += 4; |
| 380 | | // File pointer to the start of the section |
| 381 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], self.section_data_offset + default_offset_table_size); |
| 382 | | index += 4; |
| 383 | | // Pointer to relocations (u32), PointerToLinenumbers (u32), NumberOfRelocations (u16), NumberOfLinenumbers (u16) |
| 384 | | mem.set(u8, hdr_data[index..][0..12], 0); |
| 385 | | index += 12; |
| 386 | | // Section flags |
| 387 | | mem.writeIntLittle(u32, hdr_data[index..][0..4], @bitCast(u32, std.coff.SectionHeaderFlags{ |
| 388 | | .CNT_CODE = 1, |
| 389 | | .MEM_EXECUTE = 1, |
| 390 | | .MEM_READ = 1, |
| 391 | | .MEM_WRITE = 1, |
| 392 | | })); |
| 393 | | index += 4; |
| 394 | | |
| 395 | | assert(index == optional_header_size + section_table_size); |
| 396 | | try self.base.file.?.pwriteAll(hdr_data[0..index], self.optional_header_offset); |
| 397 | | try self.base.file.?.setEndPos(self.section_data_offset + default_offset_table_size + default_size_of_code); |
| 195 | try self.populateMissingMetadata(); |
| 398 | 196 | |
| 399 | 197 | return self; |
| 400 | 198 | } |
| ... | ... | @@ -405,6 +203,9 @@ pub fn createEmpty(gpa: Allocator, options: link.Options) !*Coff { |
| 405 | 203 | 33...64 => .p64, |
| 406 | 204 | else => return error.UnsupportedCOFFArchitecture, |
| 407 | 205 | }; |
| 206 | const page_size: u32 = switch (options.target.cpu.arch) { |
| 207 | else => 0x1000, |
| 208 | }; |
| 408 | 209 | const self = try gpa.create(Coff); |
| 409 | 210 | errdefer gpa.destroy(self); |
| 410 | 211 | self.* = .{ |
| ... | ... | @@ -415,6 +216,8 @@ pub fn createEmpty(gpa: Allocator, options: link.Options) !*Coff { |
| 415 | 216 | .file = null, |
| 416 | 217 | }, |
| 417 | 218 | .ptr_width = ptr_width, |
| 219 | .page_size = page_size, |
| 220 | .data_directories = comptime mem.zeroes([N_DATA_DIRS]coff.ImageDataDirectory), |
| 418 | 221 | }; |
| 419 | 222 | |
| 420 | 223 | const use_llvm = build_options.have_llvm and options.use_llvm; |
| ... | ... | @@ -425,245 +228,530 @@ pub fn createEmpty(gpa: Allocator, options: link.Options) !*Coff { |
| 425 | 228 | return self; |
| 426 | 229 | } |
| 427 | 230 | |
| 428 | | pub fn allocateDeclIndexes(self: *Coff, decl_index: Module.Decl.Index) !void { |
| 429 | | if (self.llvm_object) |_| return; |
| 231 | pub fn deinit(self: *Coff) void { |
| 232 | const gpa = self.base.allocator; |
| 233 | |
| 234 | if (build_options.have_llvm) { |
| 235 | if (self.llvm_object) |llvm_object| llvm_object.destroy(gpa); |
| 236 | } |
| 430 | 237 | |
| 431 | | try self.offset_table.ensureUnusedCapacity(self.base.allocator, 1); |
| 238 | for (self.objects.items) |*object| { |
| 239 | object.deinit(gpa); |
| 240 | } |
| 241 | self.objects.deinit(gpa); |
| 432 | 242 | |
| 433 | | const decl = self.base.options.module.?.declPtr(decl_index); |
| 434 | | if (self.offset_table_free_list.popOrNull()) |i| { |
| 435 | | decl.link.coff.offset_table_index = i; |
| 436 | | } else { |
| 437 | | decl.link.coff.offset_table_index = @intCast(u32, self.offset_table.items.len); |
| 438 | | _ = self.offset_table.addOneAssumeCapacity(); |
| 243 | for (self.sections.items(.free_list)) |*free_list| { |
| 244 | free_list.deinit(gpa); |
| 245 | } |
| 246 | self.sections.deinit(gpa); |
| 247 | |
| 248 | for (self.managed_atoms.items) |atom| { |
| 249 | gpa.destroy(atom); |
| 250 | } |
| 251 | self.managed_atoms.deinit(gpa); |
| 439 | 252 | |
| 440 | | const entry_size = self.base.options.target.cpu.arch.ptrBitWidth() / 8; |
| 441 | | if (self.offset_table.items.len > self.offset_table_size / entry_size) { |
| 442 | | self.offset_table_size_dirty = true; |
| 253 | self.locals.deinit(gpa); |
| 254 | self.globals.deinit(gpa); |
| 255 | self.locals_free_list.deinit(gpa); |
| 256 | self.strtab.deinit(gpa); |
| 257 | self.got_entries.deinit(gpa); |
| 258 | self.got_entries_free_list.deinit(gpa); |
| 259 | self.decls.deinit(gpa); |
| 260 | self.atom_by_index_table.deinit(gpa); |
| 261 | |
| 262 | { |
| 263 | var it = self.unnamed_const_atoms.valueIterator(); |
| 264 | while (it.next()) |atoms| { |
| 265 | atoms.deinit(gpa); |
| 443 | 266 | } |
| 267 | self.unnamed_const_atoms.deinit(gpa); |
| 444 | 268 | } |
| 445 | 269 | |
| 446 | | self.offset_table.items[decl.link.coff.offset_table_index] = 0; |
| 270 | { |
| 271 | var it = self.relocs.valueIterator(); |
| 272 | while (it.next()) |relocs| { |
| 273 | relocs.deinit(gpa); |
| 274 | } |
| 275 | self.relocs.deinit(gpa); |
| 276 | } |
| 447 | 277 | } |
| 448 | 278 | |
| 449 | | fn allocateTextBlock(self: *Coff, text_block: *TextBlock, new_block_size: u64, alignment: u64) !u64 { |
| 450 | | const new_block_min_capacity = new_block_size * allocation_padding; |
| 279 | fn populateMissingMetadata(self: *Coff) !void { |
| 280 | assert(self.llvm_object == null); |
| 281 | const gpa = self.base.allocator; |
| 282 | |
| 283 | if (self.text_section_index == null) { |
| 284 | self.text_section_index = @intCast(u16, self.sections.slice().len); |
| 285 | const file_size = @intCast(u32, self.base.options.program_code_size_hint); |
| 286 | const off = self.findFreeSpace(file_size, self.page_size); // TODO we are over-aligning in file; we should track both in file and in memory pointers |
| 287 | log.debug("found .text free space 0x{x} to 0x{x}", .{ off, off + file_size }); |
| 288 | var header = coff.SectionHeader{ |
| 289 | .name = undefined, |
| 290 | .virtual_size = file_size, |
| 291 | .virtual_address = off, |
| 292 | .size_of_raw_data = file_size, |
| 293 | .pointer_to_raw_data = off, |
| 294 | .pointer_to_relocations = 0, |
| 295 | .pointer_to_linenumbers = 0, |
| 296 | .number_of_relocations = 0, |
| 297 | .number_of_linenumbers = 0, |
| 298 | .flags = .{ |
| 299 | .CNT_CODE = 1, |
| 300 | .MEM_EXECUTE = 1, |
| 301 | .MEM_READ = 1, |
| 302 | }, |
| 303 | }; |
| 304 | try self.setSectionName(&header, ".text"); |
| 305 | try self.sections.append(gpa, .{ .header = header }); |
| 306 | } |
| 307 | |
| 308 | if (self.got_section_index == null) { |
| 309 | self.got_section_index = @intCast(u16, self.sections.slice().len); |
| 310 | const file_size = @intCast(u32, self.base.options.symbol_count_hint); |
| 311 | const off = self.findFreeSpace(file_size, self.page_size); |
| 312 | log.debug("found .got free space 0x{x} to 0x{x}", .{ off, off + file_size }); |
| 313 | var header = coff.SectionHeader{ |
| 314 | .name = undefined, |
| 315 | .virtual_size = file_size, |
| 316 | .virtual_address = off, |
| 317 | .size_of_raw_data = file_size, |
| 318 | .pointer_to_raw_data = off, |
| 319 | .pointer_to_relocations = 0, |
| 320 | .pointer_to_linenumbers = 0, |
| 321 | .number_of_relocations = 0, |
| 322 | .number_of_linenumbers = 0, |
| 323 | .flags = .{ |
| 324 | .CNT_INITIALIZED_DATA = 1, |
| 325 | .MEM_READ = 1, |
| 326 | }, |
| 327 | }; |
| 328 | try self.setSectionName(&header, ".got"); |
| 329 | try self.sections.append(gpa, .{ .header = header }); |
| 330 | } |
| 331 | |
| 332 | if (self.rdata_section_index == null) { |
| 333 | self.rdata_section_index = @intCast(u16, self.sections.slice().len); |
| 334 | const file_size: u32 = 1024; |
| 335 | const off = self.findFreeSpace(file_size, self.page_size); |
| 336 | log.debug("found .rdata free space 0x{x} to 0x{x}", .{ off, off + file_size }); |
| 337 | var header = coff.SectionHeader{ |
| 338 | .name = undefined, |
| 339 | .virtual_size = file_size, |
| 340 | .virtual_address = off, |
| 341 | .size_of_raw_data = file_size, |
| 342 | .pointer_to_raw_data = off, |
| 343 | .pointer_to_relocations = 0, |
| 344 | .pointer_to_linenumbers = 0, |
| 345 | .number_of_relocations = 0, |
| 346 | .number_of_linenumbers = 0, |
| 347 | .flags = .{ |
| 348 | .CNT_INITIALIZED_DATA = 1, |
| 349 | .MEM_READ = 1, |
| 350 | }, |
| 351 | }; |
| 352 | try self.setSectionName(&header, ".rdata"); |
| 353 | try self.sections.append(gpa, .{ .header = header }); |
| 354 | } |
| 355 | |
| 356 | if (self.data_section_index == null) { |
| 357 | self.data_section_index = @intCast(u16, self.sections.slice().len); |
| 358 | const file_size: u32 = 1024; |
| 359 | const off = self.findFreeSpace(file_size, self.page_size); |
| 360 | log.debug("found .data free space 0x{x} to 0x{x}", .{ off, off + file_size }); |
| 361 | var header = coff.SectionHeader{ |
| 362 | .name = undefined, |
| 363 | .virtual_size = file_size, |
| 364 | .virtual_address = off, |
| 365 | .size_of_raw_data = file_size, |
| 366 | .pointer_to_raw_data = off, |
| 367 | .pointer_to_relocations = 0, |
| 368 | .pointer_to_linenumbers = 0, |
| 369 | .number_of_relocations = 0, |
| 370 | .number_of_linenumbers = 0, |
| 371 | .flags = .{ |
| 372 | .CNT_INITIALIZED_DATA = 1, |
| 373 | .MEM_READ = 1, |
| 374 | .MEM_WRITE = 1, |
| 375 | }, |
| 376 | }; |
| 377 | try self.setSectionName(&header, ".data"); |
| 378 | try self.sections.append(gpa, .{ .header = header }); |
| 379 | } |
| 451 | 380 | |
| 452 | | // We use these to indicate our intention to update metadata, placing the new block, |
| 381 | if (self.strtab_offset == null) { |
| 382 | try self.strtab.buffer.append(gpa, 0); |
| 383 | self.strtab_offset = self.findFreeSpace(@intCast(u32, self.strtab.len()), 1); |
| 384 | log.debug("found strtab free space 0x{x} to 0x{x}", .{ self.strtab_offset.?, self.strtab_offset.? + self.strtab.len() }); |
| 385 | } |
| 386 | |
| 387 | // Index 0 is always a null symbol. |
| 388 | try self.locals.append(gpa, .{ |
| 389 | .name = [_]u8{0} ** 8, |
| 390 | .value = 0, |
| 391 | .section_number = @intToEnum(coff.SectionNumber, 0), |
| 392 | .@"type" = .{ .base_type = .NULL, .complex_type = .NULL }, |
| 393 | .storage_class = .NULL, |
| 394 | .number_of_aux_symbols = 0, |
| 395 | }); |
| 396 | |
| 397 | { |
| 398 | // We need to find out what the max file offset is according to section headers. |
| 399 | // Otherwise, we may end up with an COFF binary with file size not matching the final section's |
| 400 | // offset + it's filesize. |
| 401 | // TODO I don't like this here one bit |
| 402 | var max_file_offset: u64 = 0; |
| 403 | for (self.sections.items(.header)) |header| { |
| 404 | if (header.pointer_to_raw_data + header.size_of_raw_data > max_file_offset) { |
| 405 | max_file_offset = header.pointer_to_raw_data + header.size_of_raw_data; |
| 406 | } |
| 407 | } |
| 408 | try self.base.file.?.pwriteAll(&[_]u8{0}, max_file_offset); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | pub fn allocateDeclIndexes(self: *Coff, decl_index: Module.Decl.Index) !void { |
| 413 | if (self.llvm_object) |_| return; |
| 414 | const decl = self.base.options.module.?.declPtr(decl_index); |
| 415 | if (decl.link.coff.sym_index != 0) return; |
| 416 | decl.link.coff.sym_index = try self.allocateSymbol(); |
| 417 | const gpa = self.base.allocator; |
| 418 | try self.atom_by_index_table.putNoClobber(gpa, decl.link.coff.sym_index, &decl.link.coff); |
| 419 | try self.decls.putNoClobber(gpa, decl_index, null); |
| 420 | } |
| 421 | |
| 422 | fn allocateAtom(self: *Coff, atom: *Atom, new_atom_size: u32, alignment: u32) !u32 { |
| 423 | const tracy = trace(@src()); |
| 424 | defer tracy.end(); |
| 425 | |
| 426 | const sect_id = @enumToInt(atom.getSymbol(self).section_number) - 1; |
| 427 | const header = &self.sections.items(.header)[sect_id]; |
| 428 | const free_list = &self.sections.items(.free_list)[sect_id]; |
| 429 | const maybe_last_atom = &self.sections.items(.last_atom)[sect_id]; |
| 430 | const new_atom_ideal_capacity = if (header.isCode()) padToIdeal(new_atom_size) else new_atom_size; |
| 431 | |
| 432 | // We use these to indicate our intention to update metadata, placing the new atom, |
| 453 | 433 | // and possibly removing a free list node. |
| 454 | 434 | // It would be simpler to do it inside the for loop below, but that would cause a |
| 455 | 435 | // problem if an error was returned later in the function. So this action |
| 456 | 436 | // is actually carried out at the end of the function, when errors are no longer possible. |
| 457 | | var block_placement: ?*TextBlock = null; |
| 437 | var atom_placement: ?*Atom = null; |
| 458 | 438 | var free_list_removal: ?usize = null; |
| 459 | 439 | |
| 460 | | const vaddr = blk: { |
| 440 | // First we look for an appropriately sized free list node. |
| 441 | // The list is unordered. We'll just take the first thing that works. |
| 442 | var vaddr = blk: { |
| 461 | 443 | var i: usize = 0; |
| 462 | | while (i < self.text_block_free_list.items.len) { |
| 463 | | const free_block = self.text_block_free_list.items[i]; |
| 464 | | |
| 465 | | const next_block_text_offset = free_block.text_offset + free_block.capacity(); |
| 466 | | const new_block_text_offset = mem.alignForwardGeneric(u64, free_block.getVAddr(self.*) + free_block.size, alignment) - self.text_section_virtual_address; |
| 467 | | if (new_block_text_offset < next_block_text_offset and next_block_text_offset - new_block_text_offset >= new_block_min_capacity) { |
| 468 | | block_placement = free_block; |
| 469 | | |
| 470 | | const remaining_capacity = next_block_text_offset - new_block_text_offset - new_block_min_capacity; |
| 471 | | if (remaining_capacity < minimum_text_block_size) { |
| 472 | | free_list_removal = i; |
| 473 | | } |
| 474 | | |
| 475 | | break :blk new_block_text_offset + self.text_section_virtual_address; |
| 476 | | } else { |
| 477 | | if (!free_block.freeListEligible()) { |
| 478 | | _ = self.text_block_free_list.swapRemove(i); |
| 444 | while (i < free_list.items.len) { |
| 445 | const big_atom = free_list.items[i]; |
| 446 | // We now have a pointer to a live atom that has too much capacity. |
| 447 | // Is it enough that we could fit this new atom? |
| 448 | const sym = big_atom.getSymbol(self); |
| 449 | const capacity = big_atom.capacity(self); |
| 450 | const ideal_capacity = if (header.isCode()) padToIdeal(capacity) else capacity; |
| 451 | const ideal_capacity_end_vaddr = math.add(u32, sym.value, ideal_capacity) catch ideal_capacity; |
| 452 | const capacity_end_vaddr = sym.value + capacity; |
| 453 | const new_start_vaddr_unaligned = capacity_end_vaddr - new_atom_ideal_capacity; |
| 454 | const new_start_vaddr = mem.alignBackwardGeneric(u32, new_start_vaddr_unaligned, alignment); |
| 455 | if (new_start_vaddr < ideal_capacity_end_vaddr) { |
| 456 | // Additional bookkeeping here to notice if this free list node |
| 457 | // should be deleted because the atom that it points to has grown to take up |
| 458 | // more of the extra capacity. |
| 459 | if (!big_atom.freeListEligible(self)) { |
| 460 | _ = free_list.swapRemove(i); |
| 479 | 461 | } else { |
| 480 | 462 | i += 1; |
| 481 | 463 | } |
| 482 | 464 | continue; |
| 483 | 465 | } |
| 484 | | } else if (self.last_text_block) |last| { |
| 485 | | const new_block_vaddr = mem.alignForwardGeneric(u64, last.getVAddr(self.*) + last.size, alignment); |
| 486 | | block_placement = last; |
| 487 | | break :blk new_block_vaddr; |
| 466 | // At this point we know that we will place the new atom here. But the |
| 467 | // remaining question is whether there is still yet enough capacity left |
| 468 | // over for there to still be a free list node. |
| 469 | const remaining_capacity = new_start_vaddr - ideal_capacity_end_vaddr; |
| 470 | const keep_free_list_node = remaining_capacity >= min_text_capacity; |
| 471 | |
| 472 | // Set up the metadata to be updated, after errors are no longer possible. |
| 473 | atom_placement = big_atom; |
| 474 | if (!keep_free_list_node) { |
| 475 | free_list_removal = i; |
| 476 | } |
| 477 | break :blk new_start_vaddr; |
| 478 | } else if (maybe_last_atom.*) |last| { |
| 479 | const last_symbol = last.getSymbol(self); |
| 480 | const ideal_capacity = if (header.isCode()) padToIdeal(last.size) else last.size; |
| 481 | const ideal_capacity_end_vaddr = last_symbol.value + ideal_capacity; |
| 482 | const new_start_vaddr = mem.alignForwardGeneric(u32, ideal_capacity_end_vaddr, alignment); |
| 483 | atom_placement = last; |
| 484 | break :blk new_start_vaddr; |
| 488 | 485 | } else { |
| 489 | | break :blk self.text_section_virtual_address; |
| 486 | break :blk mem.alignForwardGeneric(u32, header.virtual_address, alignment); |
| 490 | 487 | } |
| 491 | 488 | }; |
| 492 | 489 | |
| 493 | | const expand_text_section = block_placement == null or block_placement.?.next == null; |
| 494 | | if (expand_text_section) { |
| 495 | | const needed_size = @intCast(u32, mem.alignForwardGeneric(u64, vaddr + new_block_size - self.text_section_virtual_address, file_alignment)); |
| 496 | | if (needed_size > self.text_section_size) { |
| 497 | | const current_text_section_virtual_size = mem.alignForwardGeneric(u32, self.text_section_size, section_alignment); |
| 498 | | const new_text_section_virtual_size = mem.alignForwardGeneric(u32, needed_size, section_alignment); |
| 499 | | if (current_text_section_virtual_size != new_text_section_virtual_size) { |
| 500 | | self.size_of_image_dirty = true; |
| 501 | | // Write new virtual size |
| 502 | | var buf: [4]u8 = undefined; |
| 503 | | mem.writeIntLittle(u32, &buf, new_text_section_virtual_size); |
| 504 | | try self.base.file.?.pwriteAll(&buf, self.section_table_offset + 40 + 8); |
| 505 | | } |
| 506 | | |
| 507 | | self.text_section_size = needed_size; |
| 508 | | self.text_section_size_dirty = true; |
| 490 | const expand_section = atom_placement == null or atom_placement.?.next == null; |
| 491 | if (expand_section) { |
| 492 | const sect_capacity = self.allocatedSize(header.pointer_to_raw_data); |
| 493 | const needed_size: u32 = (vaddr + new_atom_size) - header.virtual_address; |
| 494 | if (needed_size > sect_capacity) { |
| 495 | @panic("TODO move section"); |
| 509 | 496 | } |
| 510 | | self.last_text_block = text_block; |
| 497 | maybe_last_atom.* = atom; |
| 498 | // header.virtual_size = needed_size; |
| 499 | // header.size_of_raw_data = mem.alignForwardGeneric(u32, needed_size, default_file_alignment); |
| 511 | 500 | } |
| 512 | | text_block.text_offset = @intCast(u32, vaddr - self.text_section_virtual_address); |
| 513 | | text_block.size = @intCast(u32, new_block_size); |
| 514 | 501 | |
| 515 | | // This function can also reallocate a text block. |
| 516 | | // In this case we need to "unplug" it from its previous location before |
| 517 | | // plugging it in to its new location. |
| 518 | | if (text_block.prev) |prev| { |
| 519 | | prev.next = text_block.next; |
| 502 | // if (header.getAlignment().? < alignment) { |
| 503 | // header.setAlignment(alignment); |
| 504 | // } |
| 505 | atom.size = new_atom_size; |
| 506 | atom.alignment = alignment; |
| 507 | |
| 508 | if (atom.prev) |prev| { |
| 509 | prev.next = atom.next; |
| 520 | 510 | } |
| 521 | | if (text_block.next) |next| { |
| 522 | | next.prev = text_block.prev; |
| 511 | if (atom.next) |next| { |
| 512 | next.prev = atom.prev; |
| 523 | 513 | } |
| 524 | 514 | |
| 525 | | if (block_placement) |big_block| { |
| 526 | | text_block.prev = big_block; |
| 527 | | text_block.next = big_block.next; |
| 528 | | big_block.next = text_block; |
| 515 | if (atom_placement) |big_atom| { |
| 516 | atom.prev = big_atom; |
| 517 | atom.next = big_atom.next; |
| 518 | big_atom.next = atom; |
| 529 | 519 | } else { |
| 530 | | text_block.prev = null; |
| 531 | | text_block.next = null; |
| 520 | atom.prev = null; |
| 521 | atom.next = null; |
| 532 | 522 | } |
| 533 | 523 | if (free_list_removal) |i| { |
| 534 | | _ = self.text_block_free_list.swapRemove(i); |
| 524 | _ = free_list.swapRemove(i); |
| 535 | 525 | } |
| 526 | |
| 536 | 527 | return vaddr; |
| 537 | 528 | } |
| 538 | 529 | |
| 539 | | fn growTextBlock(self: *Coff, text_block: *TextBlock, new_block_size: u64, alignment: u64) !u64 { |
| 540 | | const block_vaddr = text_block.getVAddr(self.*); |
| 541 | | const align_ok = mem.alignBackwardGeneric(u64, block_vaddr, alignment) == block_vaddr; |
| 542 | | const need_realloc = !align_ok or new_block_size > text_block.capacity(); |
| 543 | | if (!need_realloc) return @as(u64, block_vaddr); |
| 544 | | return self.allocateTextBlock(text_block, new_block_size, alignment); |
| 530 | fn allocateSymbol(self: *Coff) !u32 { |
| 531 | const gpa = self.base.allocator; |
| 532 | try self.locals.ensureUnusedCapacity(gpa, 1); |
| 533 | |
| 534 | const index = blk: { |
| 535 | if (self.locals_free_list.popOrNull()) |index| { |
| 536 | log.debug(" (reusing symbol index {d})", .{index}); |
| 537 | break :blk index; |
| 538 | } else { |
| 539 | log.debug(" (allocating symbol index {d})", .{self.locals.items.len}); |
| 540 | const index = @intCast(u32, self.locals.items.len); |
| 541 | _ = self.locals.addOneAssumeCapacity(); |
| 542 | break :blk index; |
| 543 | } |
| 544 | }; |
| 545 | |
| 546 | self.locals.items[index] = .{ |
| 547 | .name = [_]u8{0} ** 8, |
| 548 | .value = 0, |
| 549 | .section_number = @intToEnum(coff.SectionNumber, 0), |
| 550 | .@"type" = .{ .base_type = .NULL, .complex_type = .NULL }, |
| 551 | .storage_class = .NULL, |
| 552 | .number_of_aux_symbols = 0, |
| 553 | }; |
| 554 | |
| 555 | return index; |
| 545 | 556 | } |
| 546 | 557 | |
| 547 | | fn shrinkTextBlock(self: *Coff, text_block: *TextBlock, new_block_size: u64) void { |
| 548 | | text_block.size = @intCast(u32, new_block_size); |
| 549 | | if (text_block.capacity() - text_block.size >= minimum_text_block_size) { |
| 550 | | self.text_block_free_list.append(self.base.allocator, text_block) catch {}; |
| 558 | pub fn allocateGotEntry(self: *Coff, target: SymbolWithLoc) !u32 { |
| 559 | const gpa = self.base.allocator; |
| 560 | try self.got_entries.ensureUnusedCapacity(gpa, 1); |
| 561 | const index: u32 = blk: { |
| 562 | if (self.got_entries_free_list.popOrNull()) |index| { |
| 563 | log.debug(" (reusing GOT entry index {d})", .{index}); |
| 564 | if (self.got_entries.getIndex(target)) |existing| { |
| 565 | assert(existing == index); |
| 566 | } |
| 567 | break :blk index; |
| 568 | } else { |
| 569 | log.debug(" (allocating GOT entry at index {d})", .{self.got_entries.keys().len}); |
| 570 | const index = @intCast(u32, self.got_entries.keys().len); |
| 571 | self.got_entries.putAssumeCapacityNoClobber(target, 0); |
| 572 | break :blk index; |
| 573 | } |
| 574 | }; |
| 575 | self.got_entries.keys()[index] = target; |
| 576 | return index; |
| 577 | } |
| 578 | |
| 579 | fn createGotAtom(self: *Coff, target: SymbolWithLoc) !*Atom { |
| 580 | const gpa = self.base.allocator; |
| 581 | const atom = try gpa.create(Atom); |
| 582 | errdefer gpa.destroy(atom); |
| 583 | atom.* = Atom.empty; |
| 584 | atom.sym_index = try self.allocateSymbol(); |
| 585 | atom.size = @sizeOf(u64); |
| 586 | atom.alignment = @alignOf(u64); |
| 587 | |
| 588 | try self.managed_atoms.append(gpa, atom); |
| 589 | try self.atom_by_index_table.putNoClobber(gpa, atom.sym_index, atom); |
| 590 | self.got_entries.getPtr(target).?.* = atom.sym_index; |
| 591 | |
| 592 | const sym = atom.getSymbolPtr(self); |
| 593 | sym.section_number = @intToEnum(coff.SectionNumber, self.got_section_index.? + 1); |
| 594 | sym.value = try self.allocateAtom(atom, atom.size, atom.alignment); |
| 595 | |
| 596 | log.debug("allocated GOT atom at 0x{x}", .{sym.value}); |
| 597 | |
| 598 | try atom.addRelocation(self, .{ |
| 599 | .@"type" = .direct, |
| 600 | .target = target, |
| 601 | .offset = 0, |
| 602 | .addend = 0, |
| 603 | .pcrel = false, |
| 604 | .length = 3, |
| 605 | .prev_vaddr = sym.value, |
| 606 | }); |
| 607 | |
| 608 | return atom; |
| 609 | } |
| 610 | |
| 611 | fn growAtom(self: *Coff, atom: *Atom, new_atom_size: u32, alignment: u32) !u32 { |
| 612 | const sym = atom.getSymbol(self); |
| 613 | const align_ok = mem.alignBackwardGeneric(u32, sym.value, alignment) == sym.value; |
| 614 | const need_realloc = !align_ok or new_atom_size > atom.capacity(self); |
| 615 | if (!need_realloc) return sym.value; |
| 616 | return self.allocateAtom(atom, new_atom_size, alignment); |
| 617 | } |
| 618 | |
| 619 | fn shrinkAtom(self: *Coff, atom: *Atom, new_block_size: u32) void { |
| 620 | _ = self; |
| 621 | _ = atom; |
| 622 | _ = new_block_size; |
| 623 | // TODO check the new capacity, and if it crosses the size threshold into a big enough |
| 624 | // capacity, insert a free list node for it. |
| 625 | } |
| 626 | |
| 627 | fn writeAtom(self: *Coff, atom: *Atom, code: []const u8) !void { |
| 628 | const sym = atom.getSymbol(self); |
| 629 | const section = self.sections.get(@enumToInt(sym.section_number) - 1); |
| 630 | const file_offset = section.header.pointer_to_raw_data + sym.value - section.header.virtual_address; |
| 631 | log.debug("writing atom for symbol {s} at file offset 0x{x}", .{ atom.getName(self), file_offset }); |
| 632 | try self.base.file.?.pwriteAll(code, file_offset); |
| 633 | try self.resolveRelocs(atom); |
| 634 | } |
| 635 | |
| 636 | fn writeGotAtom(self: *Coff, atom: *Atom) !void { |
| 637 | switch (self.ptr_width) { |
| 638 | .p32 => { |
| 639 | var buffer: [@sizeOf(u32)]u8 = [_]u8{0} ** @sizeOf(u32); |
| 640 | try self.writeAtom(atom, &buffer); |
| 641 | }, |
| 642 | .p64 => { |
| 643 | var buffer: [@sizeOf(u64)]u8 = [_]u8{0} ** @sizeOf(u64); |
| 644 | try self.writeAtom(atom, &buffer); |
| 645 | }, |
| 551 | 646 | } |
| 552 | 647 | } |
| 553 | 648 | |
| 554 | | fn freeTextBlock(self: *Coff, text_block: *TextBlock) void { |
| 649 | fn resolveRelocs(self: *Coff, atom: *Atom) !void { |
| 650 | const relocs = self.relocs.get(atom) orelse return; |
| 651 | const source_sym = atom.getSymbol(self); |
| 652 | const source_section = self.sections.get(@enumToInt(source_sym.section_number) - 1).header; |
| 653 | const file_offset = source_section.pointer_to_raw_data + source_sym.value - source_section.virtual_address; |
| 654 | |
| 655 | log.debug("relocating '{s}'", .{atom.getName(self)}); |
| 656 | |
| 657 | for (relocs.items) |*reloc| { |
| 658 | const target_vaddr = switch (reloc.@"type") { |
| 659 | .got => blk: { |
| 660 | const got_atom = self.getGotAtomForSymbol(reloc.target) orelse continue; |
| 661 | break :blk got_atom.getSymbol(self).value; |
| 662 | }, |
| 663 | .direct => self.getSymbol(reloc.target).value, |
| 664 | }; |
| 665 | const target_vaddr_with_addend = target_vaddr + reloc.addend; |
| 666 | |
| 667 | if (target_vaddr_with_addend == reloc.prev_vaddr) continue; |
| 668 | |
| 669 | log.debug(" ({x}: [() => 0x{x} ({s})) ({s})", .{ |
| 670 | reloc.offset, |
| 671 | target_vaddr_with_addend, |
| 672 | self.getSymbolName(reloc.target), |
| 673 | @tagName(reloc.@"type"), |
| 674 | }); |
| 675 | |
| 676 | if (reloc.pcrel) { |
| 677 | const source_vaddr = source_sym.value + reloc.offset; |
| 678 | const disp = target_vaddr_with_addend - source_vaddr - 4; |
| 679 | try self.base.file.?.pwriteAll(mem.asBytes(&@intCast(u32, disp)), file_offset + reloc.offset); |
| 680 | return; |
| 681 | } |
| 682 | |
| 683 | switch (self.ptr_width) { |
| 684 | .p32 => try self.base.file.?.pwriteAll( |
| 685 | mem.asBytes(&@intCast(u32, target_vaddr_with_addend + default_image_base_exe)), |
| 686 | file_offset + reloc.offset, |
| 687 | ), |
| 688 | .p64 => switch (reloc.length) { |
| 689 | 2 => try self.base.file.?.pwriteAll( |
| 690 | mem.asBytes(&@truncate(u32, target_vaddr_with_addend + default_image_base_exe)), |
| 691 | file_offset + reloc.offset, |
| 692 | ), |
| 693 | 3 => try self.base.file.?.pwriteAll( |
| 694 | mem.asBytes(&(target_vaddr_with_addend + default_image_base_exe)), |
| 695 | file_offset + reloc.offset, |
| 696 | ), |
| 697 | else => unreachable, |
| 698 | }, |
| 699 | } |
| 700 | |
| 701 | reloc.prev_vaddr = target_vaddr_with_addend; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | fn freeAtom(self: *Coff, atom: *Atom) void { |
| 706 | log.debug("freeAtom {*}", .{atom}); |
| 707 | |
| 708 | const sym = atom.getSymbol(self); |
| 709 | const sect_id = @enumToInt(sym.section_number) - 1; |
| 710 | const free_list = &self.sections.items(.free_list)[sect_id]; |
| 555 | 711 | var already_have_free_list_node = false; |
| 556 | 712 | { |
| 557 | 713 | var i: usize = 0; |
| 558 | | // TODO turn text_block_free_list into a hash map |
| 559 | | while (i < self.text_block_free_list.items.len) { |
| 560 | | if (self.text_block_free_list.items[i] == text_block) { |
| 561 | | _ = self.text_block_free_list.swapRemove(i); |
| 714 | // TODO turn free_list into a hash map |
| 715 | while (i < free_list.items.len) { |
| 716 | if (free_list.items[i] == atom) { |
| 717 | _ = free_list.swapRemove(i); |
| 562 | 718 | continue; |
| 563 | 719 | } |
| 564 | | if (self.text_block_free_list.items[i] == text_block.prev) { |
| 720 | if (free_list.items[i] == atom.prev) { |
| 565 | 721 | already_have_free_list_node = true; |
| 566 | 722 | } |
| 567 | 723 | i += 1; |
| 568 | 724 | } |
| 569 | 725 | } |
| 570 | | if (self.last_text_block == text_block) { |
| 571 | | self.last_text_block = text_block.prev; |
| 726 | |
| 727 | const maybe_last_atom = &self.sections.items(.last_atom)[sect_id]; |
| 728 | if (maybe_last_atom.*) |last_atom| { |
| 729 | if (last_atom == atom) { |
| 730 | if (atom.prev) |prev| { |
| 731 | // TODO shrink the section size here |
| 732 | maybe_last_atom.* = prev; |
| 733 | } else { |
| 734 | maybe_last_atom.* = null; |
| 735 | } |
| 736 | } |
| 572 | 737 | } |
| 573 | | if (text_block.prev) |prev| { |
| 574 | | prev.next = text_block.next; |
| 575 | 738 | |
| 576 | | if (!already_have_free_list_node and prev.freeListEligible()) { |
| 739 | if (atom.prev) |prev| { |
| 740 | prev.next = atom.next; |
| 741 | |
| 742 | if (!already_have_free_list_node and prev.freeListEligible(self)) { |
| 577 | 743 | // The free list is heuristics, it doesn't have to be perfect, so we can |
| 578 | 744 | // ignore the OOM here. |
| 579 | | self.text_block_free_list.append(self.base.allocator, prev) catch {}; |
| 745 | free_list.append(self.base.allocator, prev) catch {}; |
| 580 | 746 | } |
| 747 | } else { |
| 748 | atom.prev = null; |
| 581 | 749 | } |
| 582 | 750 | |
| 583 | | if (text_block.next) |next| { |
| 584 | | next.prev = text_block.prev; |
| 585 | | } |
| 586 | | } |
| 587 | | |
| 588 | | fn writeOffsetTableEntry(self: *Coff, index: usize) !void { |
| 589 | | const entry_size = self.base.options.target.cpu.arch.ptrBitWidth() / 8; |
| 590 | | const endian = self.base.options.target.cpu.arch.endian(); |
| 591 | | |
| 592 | | const offset_table_start = self.section_data_offset; |
| 593 | | if (self.offset_table_size_dirty) { |
| 594 | | const current_raw_size = self.offset_table_size; |
| 595 | | const new_raw_size = self.offset_table_size * 2; |
| 596 | | log.debug("growing offset table from raw size {} to {}\n", .{ current_raw_size, new_raw_size }); |
| 597 | | |
| 598 | | // Move the text section to a new place in the executable |
| 599 | | const current_text_section_start = self.section_data_offset + current_raw_size; |
| 600 | | const new_text_section_start = self.section_data_offset + new_raw_size; |
| 601 | | |
| 602 | | const amt = try self.base.file.?.copyRangeAll(current_text_section_start, self.base.file.?, new_text_section_start, self.text_section_size); |
| 603 | | if (amt != self.text_section_size) return error.InputOutput; |
| 604 | | |
| 605 | | // Write the new raw size in the .got header |
| 606 | | var buf: [8]u8 = undefined; |
| 607 | | mem.writeIntLittle(u32, buf[0..4], new_raw_size); |
| 608 | | try self.base.file.?.pwriteAll(buf[0..4], self.section_table_offset + 16); |
| 609 | | // Write the new .text section file offset in the .text section header |
| 610 | | mem.writeIntLittle(u32, buf[0..4], new_text_section_start); |
| 611 | | try self.base.file.?.pwriteAll(buf[0..4], self.section_table_offset + 40 + 20); |
| 612 | | |
| 613 | | const current_virtual_size = mem.alignForwardGeneric(u32, self.offset_table_size, section_alignment); |
| 614 | | const new_virtual_size = mem.alignForwardGeneric(u32, new_raw_size, section_alignment); |
| 615 | | // If we had to move in the virtual address space, we need to fix the VAs in the offset table, as well as the virtual address of the `.text` section |
| 616 | | // and the virtual size of the `.got` section |
| 617 | | |
| 618 | | if (new_virtual_size != current_virtual_size) { |
| 619 | | log.debug("growing offset table from virtual size {} to {}\n", .{ current_virtual_size, new_virtual_size }); |
| 620 | | self.size_of_image_dirty = true; |
| 621 | | const va_offset = new_virtual_size - current_virtual_size; |
| 622 | | |
| 623 | | // Write .got virtual size |
| 624 | | mem.writeIntLittle(u32, buf[0..4], new_virtual_size); |
| 625 | | try self.base.file.?.pwriteAll(buf[0..4], self.section_table_offset + 8); |
| 626 | | |
| 627 | | // Write .text new virtual address |
| 628 | | self.text_section_virtual_address = self.text_section_virtual_address + va_offset; |
| 629 | | mem.writeIntLittle(u32, buf[0..4], self.text_section_virtual_address - default_image_base); |
| 630 | | try self.base.file.?.pwriteAll(buf[0..4], self.section_table_offset + 40 + 12); |
| 631 | | |
| 632 | | // Fix the VAs in the offset table |
| 633 | | for (self.offset_table.items) |*va, idx| { |
| 634 | | if (va.* != 0) { |
| 635 | | va.* += va_offset; |
| 636 | | |
| 637 | | switch (entry_size) { |
| 638 | | 4 => { |
| 639 | | mem.writeInt(u32, buf[0..4], @intCast(u32, va.*), endian); |
| 640 | | try self.base.file.?.pwriteAll(buf[0..4], offset_table_start + idx * entry_size); |
| 641 | | }, |
| 642 | | 8 => { |
| 643 | | mem.writeInt(u64, &buf, va.*, endian); |
| 644 | | try self.base.file.?.pwriteAll(&buf, offset_table_start + idx * entry_size); |
| 645 | | }, |
| 646 | | else => unreachable, |
| 647 | | } |
| 648 | | } |
| 649 | | } |
| 650 | | } |
| 651 | | self.offset_table_size = new_raw_size; |
| 652 | | self.offset_table_size_dirty = false; |
| 653 | | } |
| 654 | | // Write the new entry |
| 655 | | switch (entry_size) { |
| 656 | | 4 => { |
| 657 | | var buf: [4]u8 = undefined; |
| 658 | | mem.writeInt(u32, &buf, @intCast(u32, self.offset_table.items[index]), endian); |
| 659 | | try self.base.file.?.pwriteAll(&buf, offset_table_start + index * entry_size); |
| 660 | | }, |
| 661 | | 8 => { |
| 662 | | var buf: [8]u8 = undefined; |
| 663 | | mem.writeInt(u64, &buf, self.offset_table.items[index], endian); |
| 664 | | try self.base.file.?.pwriteAll(&buf, offset_table_start + index * entry_size); |
| 665 | | }, |
| 666 | | else => unreachable, |
| 751 | if (atom.next) |next| { |
| 752 | next.prev = atom.prev; |
| 753 | } else { |
| 754 | atom.next = null; |
| 667 | 755 | } |
| 668 | 756 | } |
| 669 | 757 | |
| ... | ... | @@ -702,15 +790,18 @@ pub fn updateFunc(self: *Coff, module: *Module, func: *Module.Fn, air: Air, live |
| 702 | 790 | }, |
| 703 | 791 | }; |
| 704 | 792 | |
| 705 | | return self.finishUpdateDecl(module, func.owner_decl, code); |
| 793 | try self.updateDeclCode(decl_index, code, .FUNCTION); |
| 794 | |
| 795 | // Since we updated the vaddr and the size, each corresponding export symbol also needs to be updated. |
| 796 | const decl_exports = module.decl_exports.get(decl_index) orelse &[0]*Module.Export{}; |
| 797 | return self.updateDeclExports(module, decl_index, decl_exports); |
| 706 | 798 | } |
| 707 | 799 | |
| 708 | 800 | pub fn lowerUnnamedConst(self: *Coff, tv: TypedValue, decl_index: Module.Decl.Index) !u32 { |
| 709 | 801 | _ = self; |
| 710 | 802 | _ = tv; |
| 711 | 803 | _ = decl_index; |
| 712 | | log.debug("TODO lowerUnnamedConst for Coff", .{}); |
| 713 | | return error.AnalysisFail; |
| 804 | @panic("TODO lowerUnnamedConst"); |
| 714 | 805 | } |
| 715 | 806 | |
| 716 | 807 | pub fn updateDecl(self: *Coff, module: *Module, decl_index: Module.Decl.Index) !void { |
| ... | ... | @@ -728,16 +819,20 @@ pub fn updateDecl(self: *Coff, module: *Module, decl_index: Module.Decl.Index) ! |
| 728 | 819 | if (decl.val.tag() == .extern_fn) { |
| 729 | 820 | return; // TODO Should we do more when front-end analyzed extern decl? |
| 730 | 821 | } |
| 731 | | |
| 732 | | // TODO COFF/PE debug information |
| 733 | | // TODO Implement exports |
| 822 | if (decl.val.castTag(.variable)) |payload| { |
| 823 | const variable = payload.data; |
| 824 | if (variable.is_extern) { |
| 825 | return; // TODO Should we do more when front-end analyzed extern decl? |
| 826 | } |
| 827 | } |
| 734 | 828 | |
| 735 | 829 | var code_buffer = std.ArrayList(u8).init(self.base.allocator); |
| 736 | 830 | defer code_buffer.deinit(); |
| 737 | 831 | |
| 832 | const decl_val = if (decl.val.castTag(.variable)) |payload| payload.data.init else decl.val; |
| 738 | 833 | const res = try codegen.generateSymbol(&self.base, decl.srcLoc(), .{ |
| 739 | 834 | .ty = decl.ty, |
| 740 | | .val = decl.val, |
| 835 | .val = decl_val, |
| 741 | 836 | }, &code_buffer, .none, .{ |
| 742 | 837 | .parent_atom_index = 0, |
| 743 | 838 | }); |
| ... | ... | @@ -751,47 +846,98 @@ pub fn updateDecl(self: *Coff, module: *Module, decl_index: Module.Decl.Index) ! |
| 751 | 846 | }, |
| 752 | 847 | }; |
| 753 | 848 | |
| 754 | | return self.finishUpdateDecl(module, decl_index, code); |
| 849 | try self.updateDeclCode(decl_index, code, .NULL); |
| 850 | |
| 851 | // Since we updated the vaddr and the size, each corresponding export symbol also needs to be updated. |
| 852 | const decl_exports = module.decl_exports.get(decl_index) orelse &[0]*Module.Export{}; |
| 853 | return self.updateDeclExports(module, decl_index, decl_exports); |
| 755 | 854 | } |
| 756 | 855 | |
| 757 | | fn finishUpdateDecl(self: *Coff, module: *Module, decl_index: Module.Decl.Index, code: []const u8) !void { |
| 758 | | const decl = module.declPtr(decl_index); |
| 759 | | const required_alignment = decl.ty.abiAlignment(self.base.options.target); |
| 760 | | const curr_size = decl.link.coff.size; |
| 761 | | if (curr_size != 0) { |
| 762 | | const capacity = decl.link.coff.capacity(); |
| 763 | | const need_realloc = code.len > capacity or |
| 764 | | !mem.isAlignedGeneric(u32, decl.link.coff.text_offset, required_alignment); |
| 856 | fn getDeclOutputSection(self: *Coff, decl: *Module.Decl) u16 { |
| 857 | const ty = decl.ty; |
| 858 | const zig_ty = ty.zigTypeTag(); |
| 859 | const val = decl.val; |
| 860 | const index: u16 = blk: { |
| 861 | if (val.isUndefDeep()) { |
| 862 | // TODO in release-fast and release-small, we should put undef in .bss |
| 863 | break :blk self.data_section_index.?; |
| 864 | } |
| 865 | |
| 866 | switch (zig_ty) { |
| 867 | .Fn => break :blk self.text_section_index.?, |
| 868 | else => { |
| 869 | if (val.castTag(.variable)) |_| { |
| 870 | break :blk self.data_section_index.?; |
| 871 | } |
| 872 | break :blk self.rdata_section_index.?; |
| 873 | }, |
| 874 | } |
| 875 | }; |
| 876 | return index; |
| 877 | } |
| 878 | |
| 879 | fn updateDeclCode(self: *Coff, decl_index: Module.Decl.Index, code: []const u8, complex_type: coff.ComplexType) !void { |
| 880 | const gpa = self.base.allocator; |
| 881 | const mod = self.base.options.module.?; |
| 882 | const decl = mod.declPtr(decl_index); |
| 883 | |
| 884 | const decl_name = try decl.getFullyQualifiedName(mod); |
| 885 | defer gpa.free(decl_name); |
| 886 | |
| 887 | log.debug("updateDeclCode {s}{*}", .{ decl_name, decl }); |
| 888 | const required_alignment = decl.getAlignment(self.base.options.target); |
| 889 | |
| 890 | const decl_ptr = self.decls.getPtr(decl_index).?; |
| 891 | if (decl_ptr.* == null) { |
| 892 | decl_ptr.* = self.getDeclOutputSection(decl); |
| 893 | } |
| 894 | const sect_index = decl_ptr.*.?; |
| 895 | |
| 896 | const code_len = @intCast(u32, code.len); |
| 897 | const atom = &decl.link.coff; |
| 898 | assert(atom.sym_index != 0); // Caller forgot to allocateDeclIndexes() |
| 899 | if (atom.size != 0) { |
| 900 | const sym = atom.getSymbolPtr(self); |
| 901 | try self.setSymbolName(sym, decl_name); |
| 902 | sym.section_number = @intToEnum(coff.SectionNumber, sect_index + 1); |
| 903 | sym.@"type" = .{ .complex_type = complex_type, .base_type = .NULL }; |
| 904 | |
| 905 | const capacity = atom.capacity(self); |
| 906 | const need_realloc = code.len > capacity or !mem.isAlignedGeneric(u64, sym.value, required_alignment); |
| 765 | 907 | if (need_realloc) { |
| 766 | | const curr_vaddr = self.text_section_virtual_address + decl.link.coff.text_offset; |
| 767 | | const vaddr = try self.growTextBlock(&decl.link.coff, code.len, required_alignment); |
| 768 | | log.debug("growing {s} from 0x{x} to 0x{x}\n", .{ decl.name, curr_vaddr, vaddr }); |
| 769 | | if (vaddr != curr_vaddr) { |
| 770 | | log.debug(" (writing new offset table entry)\n", .{}); |
| 771 | | self.offset_table.items[decl.link.coff.offset_table_index] = vaddr; |
| 772 | | try self.writeOffsetTableEntry(decl.link.coff.offset_table_index); |
| 908 | const vaddr = try self.growAtom(atom, code_len, required_alignment); |
| 909 | log.debug("growing {s} from 0x{x} to 0x{x}", .{ decl_name, sym.value, vaddr }); |
| 910 | log.debug(" (required alignment 0x{x}", .{required_alignment}); |
| 911 | |
| 912 | if (vaddr != sym.value) { |
| 913 | sym.value = vaddr; |
| 914 | log.debug(" (updating GOT entry)", .{}); |
| 915 | const got_atom = self.getGotAtomForSymbol(.{ .sym_index = atom.sym_index, .file = null }).?; |
| 916 | try self.writeGotAtom(got_atom); |
| 773 | 917 | } |
| 774 | | } else if (code.len < curr_size) { |
| 775 | | self.shrinkTextBlock(&decl.link.coff, code.len); |
| 918 | } else if (code_len < atom.size) { |
| 919 | self.shrinkAtom(atom, code_len); |
| 776 | 920 | } |
| 921 | atom.size = code_len; |
| 777 | 922 | } else { |
| 778 | | const vaddr = try self.allocateTextBlock(&decl.link.coff, code.len, required_alignment); |
| 779 | | log.debug("allocated text block for {s} at 0x{x} (size: {Bi})\n", .{ |
| 780 | | mem.sliceTo(decl.name, 0), |
| 781 | | vaddr, |
| 782 | | std.fmt.fmtIntSizeDec(code.len), |
| 783 | | }); |
| 784 | | errdefer self.freeTextBlock(&decl.link.coff); |
| 785 | | self.offset_table.items[decl.link.coff.offset_table_index] = vaddr; |
| 786 | | try self.writeOffsetTableEntry(decl.link.coff.offset_table_index); |
| 923 | const sym = atom.getSymbolPtr(self); |
| 924 | try self.setSymbolName(sym, decl_name); |
| 925 | sym.section_number = @intToEnum(coff.SectionNumber, sect_index + 1); |
| 926 | sym.@"type" = .{ .complex_type = complex_type, .base_type = .NULL }; |
| 927 | |
| 928 | const vaddr = try self.allocateAtom(atom, code_len, required_alignment); |
| 929 | errdefer self.freeAtom(atom); |
| 930 | log.debug("allocated atom for {s} at 0x{x}", .{ decl_name, vaddr }); |
| 931 | atom.size = code_len; |
| 932 | sym.value = vaddr; |
| 933 | |
| 934 | const got_target = SymbolWithLoc{ .sym_index = atom.sym_index, .file = null }; |
| 935 | _ = try self.allocateGotEntry(got_target); |
| 936 | const got_atom = try self.createGotAtom(got_target); |
| 937 | try self.writeGotAtom(got_atom); |
| 787 | 938 | } |
| 788 | 939 | |
| 789 | | // Write the code into the file |
| 790 | | try self.base.file.?.pwriteAll(code, self.section_data_offset + self.offset_table_size + decl.link.coff.text_offset); |
| 791 | | |
| 792 | | // Since we updated the vaddr and the size, each corresponding export symbol also needs to be updated. |
| 793 | | const decl_exports = module.decl_exports.get(decl_index) orelse &[0]*Module.Export{}; |
| 794 | | return self.updateDeclExports(module, decl_index, decl_exports); |
| 940 | try self.writeAtom(atom, code); |
| 795 | 941 | } |
| 796 | 942 | |
| 797 | 943 | pub fn freeDecl(self: *Coff, decl_index: Module.Decl.Index) void { |
| ... | ... | @@ -802,9 +948,31 @@ pub fn freeDecl(self: *Coff, decl_index: Module.Decl.Index) void { |
| 802 | 948 | const mod = self.base.options.module.?; |
| 803 | 949 | const decl = mod.declPtr(decl_index); |
| 804 | 950 | |
| 951 | log.debug("freeDecl {*}", .{decl}); |
| 952 | |
| 953 | const kv = self.decls.fetchRemove(decl_index); |
| 954 | if (kv.?.value) |_| { |
| 955 | self.freeAtom(&decl.link.coff); |
| 956 | } |
| 957 | |
| 805 | 958 | // Appending to free lists is allowed to fail because the free lists are heuristics based anyway. |
| 806 | | self.freeTextBlock(&decl.link.coff); |
| 807 | | self.offset_table_free_list.append(self.base.allocator, decl.link.coff.offset_table_index) catch {}; |
| 959 | const gpa = self.base.allocator; |
| 960 | const sym_index = decl.link.coff.sym_index; |
| 961 | if (sym_index != 0) { |
| 962 | self.locals_free_list.append(gpa, sym_index) catch {}; |
| 963 | |
| 964 | // Try freeing GOT atom if this decl had one |
| 965 | const got_target = SymbolWithLoc{ .sym_index = sym_index, .file = null }; |
| 966 | if (self.got_entries.getIndex(got_target)) |got_index| { |
| 967 | self.got_entries_free_list.append(gpa, @intCast(u32, got_index)) catch {}; |
| 968 | self.got_entries.values()[got_index] = 0; |
| 969 | log.debug(" adding GOT index {d} to free list (target local@{d})", .{ got_index, sym_index }); |
| 970 | } |
| 971 | |
| 972 | self.locals.items[sym_index].section_number = @intToEnum(coff.SectionNumber, 0); |
| 973 | _ = self.atom_by_index_table.remove(sym_index); |
| 974 | decl.link.coff.sym_index = 0; |
| 975 | } |
| 808 | 976 | } |
| 809 | 977 | |
| 810 | 978 | pub fn updateDeclExports( |
| ... | ... | @@ -817,64 +985,157 @@ pub fn updateDeclExports( |
| 817 | 985 | @panic("Attempted to compile for object format that was disabled by build configuration"); |
| 818 | 986 | } |
| 819 | 987 | |
| 820 | | // Even in the case of LLVM, we need to notice certain exported symbols in order to |
| 821 | | // detect the default subsystem. |
| 822 | | for (exports) |exp| { |
| 823 | | const exported_decl = module.declPtr(exp.exported_decl); |
| 824 | | if (exported_decl.getFunction() == null) continue; |
| 825 | | const winapi_cc = switch (self.base.options.target.cpu.arch) { |
| 826 | | .i386 => std.builtin.CallingConvention.Stdcall, |
| 827 | | else => std.builtin.CallingConvention.C, |
| 828 | | }; |
| 829 | | const decl_cc = exported_decl.ty.fnCallingConvention(); |
| 830 | | if (decl_cc == .C and mem.eql(u8, exp.options.name, "main") and |
| 831 | | self.base.options.link_libc) |
| 832 | | { |
| 833 | | module.stage1_flags.have_c_main = true; |
| 834 | | } else if (decl_cc == winapi_cc and self.base.options.target.os.tag == .windows) { |
| 835 | | if (mem.eql(u8, exp.options.name, "WinMain")) { |
| 836 | | module.stage1_flags.have_winmain = true; |
| 837 | | } else if (mem.eql(u8, exp.options.name, "wWinMain")) { |
| 838 | | module.stage1_flags.have_wwinmain = true; |
| 839 | | } else if (mem.eql(u8, exp.options.name, "WinMainCRTStartup")) { |
| 840 | | module.stage1_flags.have_winmain_crt_startup = true; |
| 841 | | } else if (mem.eql(u8, exp.options.name, "wWinMainCRTStartup")) { |
| 842 | | module.stage1_flags.have_wwinmain_crt_startup = true; |
| 843 | | } else if (mem.eql(u8, exp.options.name, "DllMainCRTStartup")) { |
| 844 | | module.stage1_flags.have_dllmain_crt_startup = true; |
| 988 | if (build_options.have_llvm) { |
| 989 | // Even in the case of LLVM, we need to notice certain exported symbols in order to |
| 990 | // detect the default subsystem. |
| 991 | for (exports) |exp| { |
| 992 | const exported_decl = module.declPtr(exp.exported_decl); |
| 993 | if (exported_decl.getFunction() == null) continue; |
| 994 | const winapi_cc = switch (self.base.options.target.cpu.arch) { |
| 995 | .i386 => std.builtin.CallingConvention.Stdcall, |
| 996 | else => std.builtin.CallingConvention.C, |
| 997 | }; |
| 998 | const decl_cc = exported_decl.ty.fnCallingConvention(); |
| 999 | if (decl_cc == .C and mem.eql(u8, exp.options.name, "main") and |
| 1000 | self.base.options.link_libc) |
| 1001 | { |
| 1002 | module.stage1_flags.have_c_main = true; |
| 1003 | } else if (decl_cc == winapi_cc and self.base.options.target.os.tag == .windows) { |
| 1004 | if (mem.eql(u8, exp.options.name, "WinMain")) { |
| 1005 | module.stage1_flags.have_winmain = true; |
| 1006 | } else if (mem.eql(u8, exp.options.name, "wWinMain")) { |
| 1007 | module.stage1_flags.have_wwinmain = true; |
| 1008 | } else if (mem.eql(u8, exp.options.name, "WinMainCRTStartup")) { |
| 1009 | module.stage1_flags.have_winmain_crt_startup = true; |
| 1010 | } else if (mem.eql(u8, exp.options.name, "wWinMainCRTStartup")) { |
| 1011 | module.stage1_flags.have_wwinmain_crt_startup = true; |
| 1012 | } else if (mem.eql(u8, exp.options.name, "DllMainCRTStartup")) { |
| 1013 | module.stage1_flags.have_dllmain_crt_startup = true; |
| 1014 | } |
| 845 | 1015 | } |
| 846 | 1016 | } |
| 847 | | } |
| 848 | 1017 | |
| 849 | | if (build_options.have_llvm) { |
| 850 | 1018 | if (self.llvm_object) |llvm_object| return llvm_object.updateDeclExports(module, decl_index, exports); |
| 851 | 1019 | } |
| 852 | 1020 | |
| 1021 | const tracy = trace(@src()); |
| 1022 | defer tracy.end(); |
| 1023 | |
| 1024 | const gpa = self.base.allocator; |
| 1025 | |
| 853 | 1026 | const decl = module.declPtr(decl_index); |
| 1027 | const atom = &decl.link.coff; |
| 1028 | if (atom.sym_index == 0) return; |
| 1029 | const decl_sym = atom.getSymbol(self); |
| 1030 | |
| 854 | 1031 | for (exports) |exp| { |
| 1032 | log.debug("adding new export '{s}'", .{exp.options.name}); |
| 1033 | |
| 855 | 1034 | if (exp.options.section) |section_name| { |
| 856 | 1035 | if (!mem.eql(u8, section_name, ".text")) { |
| 857 | | try module.failed_exports.ensureUnusedCapacity(module.gpa, 1); |
| 858 | | module.failed_exports.putAssumeCapacityNoClobber( |
| 1036 | try module.failed_exports.putNoClobber( |
| 1037 | module.gpa, |
| 859 | 1038 | exp, |
| 860 | | try Module.ErrorMsg.create(self.base.allocator, decl.srcLoc(), "Unimplemented: ExportOptions.section", .{}), |
| 1039 | try Module.ErrorMsg.create( |
| 1040 | gpa, |
| 1041 | decl.srcLoc(), |
| 1042 | "Unimplemented: ExportOptions.section", |
| 1043 | .{}, |
| 1044 | ), |
| 861 | 1045 | ); |
| 862 | 1046 | continue; |
| 863 | 1047 | } |
| 864 | 1048 | } |
| 865 | | if (mem.eql(u8, exp.options.name, "_start")) { |
| 866 | | self.entry_addr = decl.link.coff.getVAddr(self.*) - default_image_base; |
| 867 | | } else { |
| 868 | | try module.failed_exports.ensureUnusedCapacity(module.gpa, 1); |
| 869 | | module.failed_exports.putAssumeCapacityNoClobber( |
| 1049 | |
| 1050 | if (exp.options.linkage == .LinkOnce) { |
| 1051 | try module.failed_exports.putNoClobber( |
| 1052 | module.gpa, |
| 870 | 1053 | exp, |
| 871 | | try Module.ErrorMsg.create(self.base.allocator, decl.srcLoc(), "Unimplemented: Exports other than '_start'", .{}), |
| 1054 | try Module.ErrorMsg.create( |
| 1055 | gpa, |
| 1056 | decl.srcLoc(), |
| 1057 | "Unimplemented: GlobalLinkage.LinkOnce", |
| 1058 | .{}, |
| 1059 | ), |
| 872 | 1060 | ); |
| 873 | 1061 | continue; |
| 874 | 1062 | } |
| 1063 | |
| 1064 | const sym_index = exp.link.coff.sym_index orelse blk: { |
| 1065 | const sym_index = try self.allocateSymbol(); |
| 1066 | exp.link.coff.sym_index = sym_index; |
| 1067 | break :blk sym_index; |
| 1068 | }; |
| 1069 | const sym_loc = SymbolWithLoc{ .sym_index = sym_index, .file = null }; |
| 1070 | const sym = self.getSymbolPtr(sym_loc); |
| 1071 | try self.setSymbolName(sym, exp.options.name); |
| 1072 | sym.value = decl_sym.value; |
| 1073 | sym.section_number = @intToEnum(coff.SectionNumber, self.text_section_index.? + 1); |
| 1074 | sym.@"type" = .{ .complex_type = .FUNCTION, .base_type = .NULL }; |
| 1075 | |
| 1076 | switch (exp.options.linkage) { |
| 1077 | .Strong => { |
| 1078 | sym.storage_class = .EXTERNAL; |
| 1079 | }, |
| 1080 | .Internal => @panic("TODO Internal"), |
| 1081 | .Weak => @panic("TODO WeakExternal"), |
| 1082 | else => unreachable, |
| 1083 | } |
| 1084 | |
| 1085 | try self.resolveGlobalSymbol(sym_loc); |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | pub fn deleteExport(self: *Coff, exp: Export) void { |
| 1090 | if (self.llvm_object) |_| return; |
| 1091 | const sym_index = exp.sym_index orelse return; |
| 1092 | |
| 1093 | const gpa = self.base.allocator; |
| 1094 | |
| 1095 | const sym_loc = SymbolWithLoc{ .sym_index = sym_index, .file = null }; |
| 1096 | const sym = self.getSymbolPtr(sym_loc); |
| 1097 | const sym_name = self.getSymbolName(sym_loc); |
| 1098 | log.debug("deleting export '{s}'", .{sym_name}); |
| 1099 | assert(sym.storage_class == .EXTERNAL); |
| 1100 | sym.* = .{ |
| 1101 | .name = [_]u8{0} ** 8, |
| 1102 | .value = 0, |
| 1103 | .section_number = @intToEnum(coff.SectionNumber, 0), |
| 1104 | .@"type" = .{ .base_type = .NULL, .complex_type = .NULL }, |
| 1105 | .storage_class = .NULL, |
| 1106 | .number_of_aux_symbols = 0, |
| 1107 | }; |
| 1108 | self.locals_free_list.append(gpa, sym_index) catch {}; |
| 1109 | |
| 1110 | if (self.globals.get(sym_name)) |global| blk: { |
| 1111 | if (global.sym_index != sym_index) break :blk; |
| 1112 | if (global.file != null) break :blk; |
| 1113 | const kv = self.globals.fetchSwapRemove(sym_name); |
| 1114 | gpa.free(kv.?.key); |
| 875 | 1115 | } |
| 876 | 1116 | } |
| 877 | 1117 | |
| 1118 | fn resolveGlobalSymbol(self: *Coff, current: SymbolWithLoc) !void { |
| 1119 | const gpa = self.base.allocator; |
| 1120 | const sym = self.getSymbol(current); |
| 1121 | _ = sym; |
| 1122 | const sym_name = self.getSymbolName(current); |
| 1123 | |
| 1124 | const name = try gpa.dupe(u8, sym_name); |
| 1125 | const global_index = @intCast(u32, self.globals.values().len); |
| 1126 | _ = global_index; |
| 1127 | const gop = try self.globals.getOrPut(gpa, name); |
| 1128 | defer if (gop.found_existing) gpa.free(name); |
| 1129 | |
| 1130 | if (!gop.found_existing) { |
| 1131 | gop.value_ptr.* = current; |
| 1132 | // TODO undef + tentative |
| 1133 | return; |
| 1134 | } |
| 1135 | |
| 1136 | log.debug("TODO finish resolveGlobalSymbols implementation", .{}); |
| 1137 | } |
| 1138 | |
| 878 | 1139 | pub fn flush(self: *Coff, comp: *Compilation, prog_node: *std.Progress.Node) !void { |
| 879 | 1140 | if (self.base.options.emit == null) { |
| 880 | 1141 | if (build_options.have_llvm) { |
| ... | ... | @@ -884,14 +1145,13 @@ pub fn flush(self: *Coff, comp: *Compilation, prog_node: *std.Progress.Node) !vo |
| 884 | 1145 | } |
| 885 | 1146 | return; |
| 886 | 1147 | } |
| 887 | | if (build_options.have_llvm and self.base.options.use_lld) { |
| 888 | | return self.linkWithLLD(comp, prog_node); |
| 889 | | } else { |
| 890 | | switch (self.base.options.effectiveOutputMode()) { |
| 891 | | .Exe, .Obj => {}, |
| 892 | | .Lib => return error.TODOImplementWritingLibFiles, |
| 893 | | } |
| 894 | | return self.flushModule(comp, prog_node); |
| 1148 | const use_lld = build_options.have_llvm and self.base.options.use_lld; |
| 1149 | if (use_lld) { |
| 1150 | return lld.linkWithLLD(self, comp, prog_node); |
| 1151 | } |
| 1152 | switch (self.base.options.output_mode) { |
| 1153 | .Exe, .Obj => return self.flushModule(comp, prog_node), |
| 1154 | .Lib => return error.TODOImplementWritingLibFiles, |
| 895 | 1155 | } |
| 896 | 1156 | } |
| 897 | 1157 | |
| ... | ... | @@ -909,648 +1169,449 @@ pub fn flushModule(self: *Coff, comp: *Compilation, prog_node: *std.Progress.Nod |
| 909 | 1169 | sub_prog_node.activate(); |
| 910 | 1170 | defer sub_prog_node.end(); |
| 911 | 1171 | |
| 912 | | if (self.text_section_size_dirty) { |
| 913 | | // Write the new raw size in the .text header |
| 914 | | var buf: [4]u8 = undefined; |
| 915 | | mem.writeIntLittle(u32, &buf, self.text_section_size); |
| 916 | | try self.base.file.?.pwriteAll(&buf, self.section_table_offset + 40 + 16); |
| 917 | | try self.base.file.?.setEndPos(self.section_data_offset + self.offset_table_size + self.text_section_size); |
| 918 | | self.text_section_size_dirty = false; |
| 1172 | if (build_options.enable_logging) { |
| 1173 | self.logSymtab(); |
| 919 | 1174 | } |
| 920 | 1175 | |
| 921 | | if (self.base.options.output_mode == .Exe and self.size_of_image_dirty) { |
| 922 | | const new_size_of_image = mem.alignForwardGeneric(u32, self.text_section_virtual_address - default_image_base + self.text_section_size, section_alignment); |
| 923 | | var buf: [4]u8 = undefined; |
| 924 | | mem.writeIntLittle(u32, &buf, new_size_of_image); |
| 925 | | try self.base.file.?.pwriteAll(&buf, self.optional_header_offset + 56); |
| 926 | | self.size_of_image_dirty = false; |
| 1176 | { |
| 1177 | var it = self.relocs.keyIterator(); |
| 1178 | while (it.next()) |atom| { |
| 1179 | try self.resolveRelocs(atom.*); |
| 1180 | } |
| 927 | 1181 | } |
| 928 | 1182 | |
| 1183 | if (self.getEntryPoint()) |entry_sym_loc| { |
| 1184 | self.entry_addr = self.getSymbol(entry_sym_loc).value; |
| 1185 | } |
| 1186 | |
| 1187 | try self.writeStrtab(); |
| 1188 | try self.writeDataDirectoriesHeaders(); |
| 1189 | try self.writeSectionHeaders(); |
| 1190 | |
| 929 | 1191 | if (self.entry_addr == null and self.base.options.output_mode == .Exe) { |
| 930 | 1192 | log.debug("flushing. no_entry_point_found = true\n", .{}); |
| 931 | 1193 | self.error_flags.no_entry_point_found = true; |
| 932 | 1194 | } else { |
| 933 | 1195 | log.debug("flushing. no_entry_point_found = false\n", .{}); |
| 934 | 1196 | self.error_flags.no_entry_point_found = false; |
| 935 | | |
| 936 | | if (self.base.options.output_mode == .Exe) { |
| 937 | | // Write AddressOfEntryPoint |
| 938 | | var buf: [4]u8 = undefined; |
| 939 | | mem.writeIntLittle(u32, &buf, self.entry_addr.?); |
| 940 | | try self.base.file.?.pwriteAll(&buf, self.optional_header_offset + 16); |
| 941 | | } |
| 1197 | try self.writeHeader(); |
| 942 | 1198 | } |
| 943 | 1199 | } |
| 944 | 1200 | |
| 945 | | fn linkWithLLD(self: *Coff, comp: *Compilation, prog_node: *std.Progress.Node) !void { |
| 946 | | const tracy = trace(@src()); |
| 947 | | defer tracy.end(); |
| 948 | | |
| 949 | | var arena_allocator = std.heap.ArenaAllocator.init(self.base.allocator); |
| 950 | | defer arena_allocator.deinit(); |
| 951 | | const arena = arena_allocator.allocator(); |
| 952 | | |
| 953 | | const directory = self.base.options.emit.?.directory; // Just an alias to make it shorter to type. |
| 954 | | const full_out_path = try directory.join(arena, &[_][]const u8{self.base.options.emit.?.sub_path}); |
| 955 | | |
| 956 | | // If there is no Zig code to compile, then we should skip flushing the output file because it |
| 957 | | // will not be part of the linker line anyway. |
| 958 | | const module_obj_path: ?[]const u8 = if (self.base.options.module) |module| blk: { |
| 959 | | const use_stage1 = build_options.have_stage1 and self.base.options.use_stage1; |
| 960 | | if (use_stage1) { |
| 961 | | const obj_basename = try std.zig.binNameAlloc(arena, .{ |
| 962 | | .root_name = self.base.options.root_name, |
| 963 | | .target = self.base.options.target, |
| 964 | | .output_mode = .Obj, |
| 965 | | }); |
| 966 | | switch (self.base.options.cache_mode) { |
| 967 | | .incremental => break :blk try module.zig_cache_artifact_directory.join( |
| 968 | | arena, |
| 969 | | &[_][]const u8{obj_basename}, |
| 970 | | ), |
| 971 | | .whole => break :blk try fs.path.join(arena, &.{ |
| 972 | | fs.path.dirname(full_out_path).?, obj_basename, |
| 973 | | }), |
| 974 | | } |
| 975 | | } |
| 976 | | |
| 977 | | try self.flushModule(comp, prog_node); |
| 1201 | pub fn getDeclVAddr( |
| 1202 | self: *Coff, |
| 1203 | decl_index: Module.Decl.Index, |
| 1204 | reloc_info: link.File.RelocInfo, |
| 1205 | ) !u64 { |
| 1206 | _ = self; |
| 1207 | _ = decl_index; |
| 1208 | _ = reloc_info; |
| 1209 | @panic("TODO getDeclVAddr"); |
| 1210 | } |
| 978 | 1211 | |
| 979 | | if (fs.path.dirname(full_out_path)) |dirname| { |
| 980 | | break :blk try fs.path.join(arena, &.{ dirname, self.base.intermediary_basename.? }); |
| 981 | | } else { |
| 982 | | break :blk self.base.intermediary_basename.?; |
| 983 | | } |
| 984 | | } else null; |
| 1212 | pub fn updateDeclLineNumber(self: *Coff, module: *Module, decl: *Module.Decl) !void { |
| 1213 | _ = self; |
| 1214 | _ = module; |
| 1215 | _ = decl; |
| 1216 | log.debug("TODO implement updateDeclLineNumber", .{}); |
| 1217 | } |
| 985 | 1218 | |
| 986 | | var sub_prog_node = prog_node.start("LLD Link", 0); |
| 987 | | sub_prog_node.activate(); |
| 988 | | sub_prog_node.context.refresh(); |
| 989 | | defer sub_prog_node.end(); |
| 1219 | fn writeStrtab(self: *Coff) !void { |
| 1220 | const allocated_size = self.allocatedSize(self.strtab_offset.?); |
| 1221 | const needed_size = @intCast(u32, self.strtab.len()); |
| 990 | 1222 | |
| 991 | | const is_lib = self.base.options.output_mode == .Lib; |
| 992 | | const is_dyn_lib = self.base.options.link_mode == .Dynamic and is_lib; |
| 993 | | const is_exe_or_dyn_lib = is_dyn_lib or self.base.options.output_mode == .Exe; |
| 994 | | const link_in_crt = self.base.options.link_libc and is_exe_or_dyn_lib; |
| 995 | | const target = self.base.options.target; |
| 1223 | if (needed_size > allocated_size) { |
| 1224 | self.strtab_offset = null; |
| 1225 | self.strtab_offset = @intCast(u32, self.findFreeSpace(needed_size, 1)); |
| 1226 | } |
| 996 | 1227 | |
| 997 | | // See link/Elf.zig for comments on how this mechanism works. |
| 998 | | const id_symlink_basename = "lld.id"; |
| 1228 | log.debug("writing strtab from 0x{x} to 0x{x}", .{ self.strtab_offset.?, self.strtab_offset.? + needed_size }); |
| 1229 | try self.base.file.?.pwriteAll(self.strtab.buffer.items, self.strtab_offset.?); |
| 1230 | } |
| 999 | 1231 | |
| 1000 | | var man: Cache.Manifest = undefined; |
| 1001 | | defer if (!self.base.options.disable_lld_caching) man.deinit(); |
| 1232 | fn writeSectionHeaders(self: *Coff) !void { |
| 1233 | const offset = self.getSectionHeadersOffset(); |
| 1234 | try self.base.file.?.pwriteAll(mem.sliceAsBytes(self.sections.items(.header)), offset); |
| 1235 | } |
| 1002 | 1236 | |
| 1003 | | var digest: [Cache.hex_digest_len]u8 = undefined; |
| 1237 | fn writeDataDirectoriesHeaders(self: *Coff) !void { |
| 1238 | const offset = self.getDataDirectoryHeadersOffset(); |
| 1239 | try self.base.file.?.pwriteAll(mem.sliceAsBytes(&self.data_directories), offset); |
| 1240 | } |
| 1004 | 1241 | |
| 1005 | | if (!self.base.options.disable_lld_caching) { |
| 1006 | | man = comp.cache_parent.obtain(); |
| 1007 | | self.base.releaseLock(); |
| 1242 | fn writeHeader(self: *Coff) !void { |
| 1243 | const gpa = self.base.allocator; |
| 1244 | var buffer = std.ArrayList(u8).init(gpa); |
| 1245 | defer buffer.deinit(); |
| 1246 | const writer = buffer.writer(); |
| 1008 | 1247 | |
| 1009 | | comptime assert(Compilation.link_hash_implementation_version == 7); |
| 1248 | try buffer.ensureTotalCapacity(self.getSizeOfHeaders()); |
| 1249 | writer.writeAll(msdos_stub) catch unreachable; |
| 1250 | mem.writeIntLittle(u32, buffer.items[0x3c..][0..4], msdos_stub.len); |
| 1010 | 1251 | |
| 1011 | | for (self.base.options.objects) |obj| { |
| 1012 | | _ = try man.addFile(obj.path, null); |
| 1013 | | man.hash.add(obj.must_link); |
| 1014 | | } |
| 1015 | | for (comp.c_object_table.keys()) |key| { |
| 1016 | | _ = try man.addFile(key.status.success.object_path, null); |
| 1017 | | } |
| 1018 | | try man.addOptionalFile(module_obj_path); |
| 1019 | | man.hash.addOptionalBytes(self.base.options.entry); |
| 1020 | | man.hash.addOptional(self.base.options.stack_size_override); |
| 1021 | | man.hash.addOptional(self.base.options.image_base_override); |
| 1022 | | man.hash.addListOfBytes(self.base.options.lib_dirs); |
| 1023 | | man.hash.add(self.base.options.skip_linker_dependencies); |
| 1024 | | if (self.base.options.link_libc) { |
| 1025 | | man.hash.add(self.base.options.libc_installation != null); |
| 1026 | | if (self.base.options.libc_installation) |libc_installation| { |
| 1027 | | man.hash.addBytes(libc_installation.crt_dir.?); |
| 1028 | | if (target.abi == .msvc) { |
| 1029 | | man.hash.addBytes(libc_installation.msvc_lib_dir.?); |
| 1030 | | man.hash.addBytes(libc_installation.kernel32_lib_dir.?); |
| 1031 | | } |
| 1032 | | } |
| 1033 | | } |
| 1034 | | link.hashAddSystemLibs(&man.hash, self.base.options.system_libs); |
| 1035 | | man.hash.addListOfBytes(self.base.options.force_undefined_symbols.keys()); |
| 1036 | | man.hash.addOptional(self.base.options.subsystem); |
| 1037 | | man.hash.add(self.base.options.is_test); |
| 1038 | | man.hash.add(self.base.options.tsaware); |
| 1039 | | man.hash.add(self.base.options.nxcompat); |
| 1040 | | man.hash.add(self.base.options.dynamicbase); |
| 1041 | | // strip does not need to go into the linker hash because it is part of the hash namespace |
| 1042 | | man.hash.addOptional(self.base.options.major_subsystem_version); |
| 1043 | | man.hash.addOptional(self.base.options.minor_subsystem_version); |
| 1044 | | |
| 1045 | | // We don't actually care whether it's a cache hit or miss; we just need the digest and the lock. |
| 1046 | | _ = try man.hit(); |
| 1047 | | digest = man.final(); |
| 1048 | | var prev_digest_buf: [digest.len]u8 = undefined; |
| 1049 | | const prev_digest: []u8 = Cache.readSmallFile( |
| 1050 | | directory.handle, |
| 1051 | | id_symlink_basename, |
| 1052 | | &prev_digest_buf, |
| 1053 | | ) catch |err| blk: { |
| 1054 | | log.debug("COFF LLD new_digest={s} error: {s}", .{ std.fmt.fmtSliceHexLower(&digest), @errorName(err) }); |
| 1055 | | // Handle this as a cache miss. |
| 1056 | | break :blk prev_digest_buf[0..0]; |
| 1057 | | }; |
| 1058 | | if (mem.eql(u8, prev_digest, &digest)) { |
| 1059 | | log.debug("COFF LLD digest={s} match - skipping invocation", .{std.fmt.fmtSliceHexLower(&digest)}); |
| 1060 | | // Hot diggity dog! The output binary is already there. |
| 1061 | | self.base.lock = man.toOwnedLock(); |
| 1062 | | return; |
| 1063 | | } |
| 1064 | | log.debug("COFF LLD prev_digest={s} new_digest={s}", .{ std.fmt.fmtSliceHexLower(prev_digest), std.fmt.fmtSliceHexLower(&digest) }); |
| 1065 | | |
| 1066 | | // We are about to change the output file to be different, so we invalidate the build hash now. |
| 1067 | | directory.handle.deleteFile(id_symlink_basename) catch |err| switch (err) { |
| 1068 | | error.FileNotFound => {}, |
| 1069 | | else => |e| return e, |
| 1070 | | }; |
| 1252 | writer.writeAll("PE\x00\x00") catch unreachable; |
| 1253 | var flags = coff.CoffHeaderFlags{ |
| 1254 | .EXECUTABLE_IMAGE = 1, |
| 1255 | .DEBUG_STRIPPED = 1, // TODO |
| 1256 | }; |
| 1257 | switch (self.ptr_width) { |
| 1258 | .p32 => flags.@"32BIT_MACHINE" = 1, |
| 1259 | .p64 => flags.LARGE_ADDRESS_AWARE = 1, |
| 1260 | } |
| 1261 | if (self.base.options.output_mode == .Lib and self.base.options.link_mode == .Dynamic) { |
| 1262 | flags.DLL = 1; |
| 1071 | 1263 | } |
| 1072 | 1264 | |
| 1073 | | if (self.base.options.output_mode == .Obj) { |
| 1074 | | // LLD's COFF driver does not support the equivalent of `-r` so we do a simple file copy |
| 1075 | | // here. TODO: think carefully about how we can avoid this redundant operation when doing |
| 1076 | | // build-obj. See also the corresponding TODO in linkAsArchive. |
| 1077 | | const the_object_path = blk: { |
| 1078 | | if (self.base.options.objects.len != 0) |
| 1079 | | break :blk self.base.options.objects[0].path; |
| 1265 | const timestamp = std.time.timestamp(); |
| 1266 | const size_of_optional_header = @intCast(u16, self.getOptionalHeaderSize() + self.getDataDirectoryHeadersSize()); |
| 1267 | var coff_header = coff.CoffHeader{ |
| 1268 | .machine = coff.MachineType.fromTargetCpuArch(self.base.options.target.cpu.arch), |
| 1269 | .number_of_sections = @intCast(u16, self.sections.slice().len), // TODO what if we prune a section |
| 1270 | .time_date_stamp = @truncate(u32, @bitCast(u64, timestamp)), |
| 1271 | .pointer_to_symbol_table = self.strtab_offset orelse 0, |
| 1272 | .number_of_symbols = 0, |
| 1273 | .size_of_optional_header = size_of_optional_header, |
| 1274 | .flags = flags, |
| 1275 | }; |
| 1080 | 1276 | |
| 1081 | | if (comp.c_object_table.count() != 0) |
| 1082 | | break :blk comp.c_object_table.keys()[0].status.success.object_path; |
| 1277 | writer.writeAll(mem.asBytes(&coff_header)) catch unreachable; |
| 1083 | 1278 | |
| 1084 | | if (module_obj_path) |p| |
| 1085 | | break :blk p; |
| 1279 | const dll_flags: coff.DllFlags = .{ |
| 1280 | .HIGH_ENTROPY_VA = 0, //@boolToInt(self.base.options.pie), |
| 1281 | .DYNAMIC_BASE = 0, |
| 1282 | .TERMINAL_SERVER_AWARE = 1, // We are not a legacy app |
| 1283 | .NX_COMPAT = 1, // We are compatible with Data Execution Prevention |
| 1284 | }; |
| 1285 | const subsystem: coff.Subsystem = .WINDOWS_CUI; |
| 1286 | const size_of_image: u32 = self.getSizeOfImage(); |
| 1287 | const size_of_headers: u32 = mem.alignForwardGeneric(u32, self.getSizeOfHeaders(), default_file_alignment); |
| 1288 | const image_base = self.base.options.image_base_override orelse switch (self.base.options.output_mode) { |
| 1289 | .Exe => default_image_base_exe, |
| 1290 | .Lib => default_image_base_dll, |
| 1291 | else => unreachable, |
| 1292 | }; |
| 1086 | 1293 | |
| 1087 | | // TODO I think this is unreachable. Audit this situation when solving the above TODO |
| 1088 | | // regarding eliding redundant object -> object transformations. |
| 1089 | | return error.NoObjectsToLink; |
| 1090 | | }; |
| 1091 | | // This can happen when using --enable-cache and using the stage1 backend. In this case |
| 1092 | | // we can skip the file copy. |
| 1093 | | if (!mem.eql(u8, the_object_path, full_out_path)) { |
| 1094 | | try fs.cwd().copyFile(the_object_path, fs.cwd(), full_out_path, .{}); |
| 1095 | | } |
| 1096 | | } else { |
| 1097 | | // Create an LLD command line and invoke it. |
| 1098 | | var argv = std.ArrayList([]const u8).init(self.base.allocator); |
| 1099 | | defer argv.deinit(); |
| 1100 | | // We will invoke ourselves as a child process to gain access to LLD. |
| 1101 | | // This is necessary because LLD does not behave properly as a library - |
| 1102 | | // it calls exit() and does not reset all global data between invocations. |
| 1103 | | try argv.appendSlice(&[_][]const u8{ comp.self_exe_path.?, "lld-link" }); |
| 1104 | | |
| 1105 | | try argv.append("-ERRORLIMIT:0"); |
| 1106 | | try argv.append("-NOLOGO"); |
| 1107 | | if (!self.base.options.strip) { |
| 1108 | | try argv.append("-DEBUG"); |
| 1109 | | } |
| 1110 | | if (self.base.options.lto) { |
| 1111 | | switch (self.base.options.optimize_mode) { |
| 1112 | | .Debug => {}, |
| 1113 | | .ReleaseSmall => try argv.append("-OPT:lldlto=2"), |
| 1114 | | .ReleaseFast, .ReleaseSafe => try argv.append("-OPT:lldlto=3"), |
| 1115 | | } |
| 1294 | const base_of_code = self.sections.get(self.text_section_index.?).header.virtual_address; |
| 1295 | const base_of_data = self.sections.get(self.data_section_index.?).header.virtual_address; |
| 1296 | |
| 1297 | var size_of_code: u32 = 0; |
| 1298 | var size_of_initialized_data: u32 = 0; |
| 1299 | var size_of_uninitialized_data: u32 = 0; |
| 1300 | for (self.sections.items(.header)) |header| { |
| 1301 | if (header.flags.CNT_CODE == 1) { |
| 1302 | size_of_code += header.size_of_raw_data; |
| 1116 | 1303 | } |
| 1117 | | if (self.base.options.output_mode == .Exe) { |
| 1118 | | const stack_size = self.base.options.stack_size_override orelse 16777216; |
| 1119 | | try argv.append(try allocPrint(arena, "-STACK:{d}", .{stack_size})); |
| 1304 | if (header.flags.CNT_INITIALIZED_DATA == 1) { |
| 1305 | size_of_initialized_data += header.size_of_raw_data; |
| 1120 | 1306 | } |
| 1121 | | if (self.base.options.image_base_override) |image_base| { |
| 1122 | | try argv.append(try std.fmt.allocPrint(arena, "-BASE:{d}", .{image_base})); |
| 1307 | if (header.flags.CNT_UNINITIALIZED_DATA == 1) { |
| 1308 | size_of_uninitialized_data += header.size_of_raw_data; |
| 1123 | 1309 | } |
| 1310 | } |
| 1124 | 1311 | |
| 1125 | | if (target.cpu.arch == .i386) { |
| 1126 | | try argv.append("-MACHINE:X86"); |
| 1127 | | } else if (target.cpu.arch == .x86_64) { |
| 1128 | | try argv.append("-MACHINE:X64"); |
| 1129 | | } else if (target.cpu.arch.isARM()) { |
| 1130 | | if (target.cpu.arch.ptrBitWidth() == 32) { |
| 1131 | | try argv.append("-MACHINE:ARM"); |
| 1132 | | } else { |
| 1133 | | try argv.append("-MACHINE:ARM64"); |
| 1134 | | } |
| 1135 | | } |
| 1312 | switch (self.ptr_width) { |
| 1313 | .p32 => { |
| 1314 | var opt_header = coff.OptionalHeaderPE32{ |
| 1315 | .magic = coff.IMAGE_NT_OPTIONAL_HDR32_MAGIC, |
| 1316 | .major_linker_version = 0, |
| 1317 | .minor_linker_version = 0, |
| 1318 | .size_of_code = size_of_code, |
| 1319 | .size_of_initialized_data = size_of_initialized_data, |
| 1320 | .size_of_uninitialized_data = size_of_uninitialized_data, |
| 1321 | .address_of_entry_point = self.entry_addr orelse 0, |
| 1322 | .base_of_code = base_of_code, |
| 1323 | .base_of_data = base_of_data, |
| 1324 | .image_base = @intCast(u32, image_base), |
| 1325 | .section_alignment = self.page_size, |
| 1326 | .file_alignment = default_file_alignment, |
| 1327 | .major_operating_system_version = 6, |
| 1328 | .minor_operating_system_version = 0, |
| 1329 | .major_image_version = 0, |
| 1330 | .minor_image_version = 0, |
| 1331 | .major_subsystem_version = 6, |
| 1332 | .minor_subsystem_version = 0, |
| 1333 | .win32_version_value = 0, |
| 1334 | .size_of_image = size_of_image, |
| 1335 | .size_of_headers = size_of_headers, |
| 1336 | .checksum = 0, |
| 1337 | .subsystem = subsystem, |
| 1338 | .dll_flags = dll_flags, |
| 1339 | .size_of_stack_reserve = default_size_of_stack_reserve, |
| 1340 | .size_of_stack_commit = default_size_of_stack_commit, |
| 1341 | .size_of_heap_reserve = default_size_of_heap_reserve, |
| 1342 | .size_of_heap_commit = default_size_of_heap_commit, |
| 1343 | .loader_flags = 0, |
| 1344 | .number_of_rva_and_sizes = @intCast(u32, self.data_directories.len), |
| 1345 | }; |
| 1346 | writer.writeAll(mem.asBytes(&opt_header)) catch unreachable; |
| 1347 | }, |
| 1348 | .p64 => { |
| 1349 | var opt_header = coff.OptionalHeaderPE64{ |
| 1350 | .magic = coff.IMAGE_NT_OPTIONAL_HDR64_MAGIC, |
| 1351 | .major_linker_version = 0, |
| 1352 | .minor_linker_version = 0, |
| 1353 | .size_of_code = size_of_code, |
| 1354 | .size_of_initialized_data = size_of_initialized_data, |
| 1355 | .size_of_uninitialized_data = size_of_uninitialized_data, |
| 1356 | .address_of_entry_point = self.entry_addr orelse 0, |
| 1357 | .base_of_code = base_of_code, |
| 1358 | .image_base = image_base, |
| 1359 | .section_alignment = self.page_size, |
| 1360 | .file_alignment = default_file_alignment, |
| 1361 | .major_operating_system_version = 6, |
| 1362 | .minor_operating_system_version = 0, |
| 1363 | .major_image_version = 0, |
| 1364 | .minor_image_version = 0, |
| 1365 | .major_subsystem_version = 6, |
| 1366 | .minor_subsystem_version = 0, |
| 1367 | .win32_version_value = 0, |
| 1368 | .size_of_image = size_of_image, |
| 1369 | .size_of_headers = size_of_headers, |
| 1370 | .checksum = 0, |
| 1371 | .subsystem = subsystem, |
| 1372 | .dll_flags = dll_flags, |
| 1373 | .size_of_stack_reserve = default_size_of_stack_reserve, |
| 1374 | .size_of_stack_commit = default_size_of_stack_commit, |
| 1375 | .size_of_heap_reserve = default_size_of_heap_reserve, |
| 1376 | .size_of_heap_commit = default_size_of_heap_commit, |
| 1377 | .loader_flags = 0, |
| 1378 | .number_of_rva_and_sizes = @intCast(u32, self.data_directories.len), |
| 1379 | }; |
| 1380 | writer.writeAll(mem.asBytes(&opt_header)) catch unreachable; |
| 1381 | }, |
| 1382 | } |
| 1136 | 1383 | |
| 1137 | | for (self.base.options.force_undefined_symbols.keys()) |symbol| { |
| 1138 | | try argv.append(try allocPrint(arena, "-INCLUDE:{s}", .{symbol})); |
| 1139 | | } |
| 1384 | try self.base.file.?.pwriteAll(buffer.items, 0); |
| 1385 | } |
| 1140 | 1386 | |
| 1141 | | if (is_dyn_lib) { |
| 1142 | | try argv.append("-DLL"); |
| 1143 | | } |
| 1387 | pub fn padToIdeal(actual_size: anytype) @TypeOf(actual_size) { |
| 1388 | // TODO https://github.com/ziglang/zig/issues/1284 |
| 1389 | return math.add(@TypeOf(actual_size), actual_size, actual_size / ideal_factor) catch |
| 1390 | math.maxInt(@TypeOf(actual_size)); |
| 1391 | } |
| 1144 | 1392 | |
| 1145 | | if (self.base.options.entry) |entry| { |
| 1146 | | try argv.append(try allocPrint(arena, "-ENTRY:{s}", .{entry})); |
| 1147 | | } |
| 1393 | fn detectAllocCollision(self: *Coff, start: u32, size: u32) ?u32 { |
| 1394 | const headers_size = self.getSizeOfHeaders(); |
| 1395 | if (start < headers_size) |
| 1396 | return headers_size; |
| 1148 | 1397 | |
| 1149 | | if (self.base.options.tsaware) { |
| 1150 | | try argv.append("-tsaware"); |
| 1151 | | } |
| 1152 | | if (self.base.options.nxcompat) { |
| 1153 | | try argv.append("-nxcompat"); |
| 1154 | | } |
| 1155 | | if (self.base.options.dynamicbase) { |
| 1156 | | try argv.append("-dynamicbase"); |
| 1157 | | } |
| 1398 | const end = start + size; |
| 1158 | 1399 | |
| 1159 | | try argv.append(try allocPrint(arena, "-OUT:{s}", .{full_out_path})); |
| 1400 | if (self.strtab_offset) |off| { |
| 1401 | const increased_size = @intCast(u32, self.strtab.len()); |
| 1402 | const test_end = off + increased_size; |
| 1403 | if (end > off and start < test_end) { |
| 1404 | return test_end; |
| 1405 | } |
| 1406 | } |
| 1160 | 1407 | |
| 1161 | | if (self.base.options.implib_emit) |emit| { |
| 1162 | | const implib_out_path = try emit.directory.join(arena, &[_][]const u8{emit.sub_path}); |
| 1163 | | try argv.append(try allocPrint(arena, "-IMPLIB:{s}", .{implib_out_path})); |
| 1408 | for (self.sections.items(.header)) |header| { |
| 1409 | const increased_size = header.size_of_raw_data; |
| 1410 | const test_end = header.pointer_to_raw_data + increased_size; |
| 1411 | if (end > header.pointer_to_raw_data and start < test_end) { |
| 1412 | return test_end; |
| 1164 | 1413 | } |
| 1414 | } |
| 1165 | 1415 | |
| 1166 | | if (self.base.options.link_libc) { |
| 1167 | | if (self.base.options.libc_installation) |libc_installation| { |
| 1168 | | try argv.append(try allocPrint(arena, "-LIBPATH:{s}", .{libc_installation.crt_dir.?})); |
| 1416 | return null; |
| 1417 | } |
| 1169 | 1418 | |
| 1170 | | if (target.abi == .msvc) { |
| 1171 | | try argv.append(try allocPrint(arena, "-LIBPATH:{s}", .{libc_installation.msvc_lib_dir.?})); |
| 1172 | | try argv.append(try allocPrint(arena, "-LIBPATH:{s}", .{libc_installation.kernel32_lib_dir.?})); |
| 1173 | | } |
| 1174 | | } |
| 1175 | | } |
| 1419 | pub fn allocatedSize(self: *Coff, start: u32) u32 { |
| 1420 | if (start == 0) |
| 1421 | return 0; |
| 1422 | var min_pos: u32 = std.math.maxInt(u32); |
| 1423 | if (self.strtab_offset) |off| { |
| 1424 | if (off > start and off < min_pos) min_pos = off; |
| 1425 | } |
| 1426 | for (self.sections.items(.header)) |header| { |
| 1427 | if (header.pointer_to_raw_data <= start) continue; |
| 1428 | if (header.pointer_to_raw_data < min_pos) min_pos = header.pointer_to_raw_data; |
| 1429 | } |
| 1430 | return min_pos - start; |
| 1431 | } |
| 1176 | 1432 | |
| 1177 | | for (self.base.options.lib_dirs) |lib_dir| { |
| 1178 | | try argv.append(try allocPrint(arena, "-LIBPATH:{s}", .{lib_dir})); |
| 1179 | | } |
| 1433 | pub fn findFreeSpace(self: *Coff, object_size: u32, min_alignment: u32) u32 { |
| 1434 | var start: u32 = 0; |
| 1435 | while (self.detectAllocCollision(start, object_size)) |item_end| { |
| 1436 | start = mem.alignForwardGeneric(u32, item_end, min_alignment); |
| 1437 | } |
| 1438 | return start; |
| 1439 | } |
| 1180 | 1440 | |
| 1181 | | try argv.ensureUnusedCapacity(self.base.options.objects.len); |
| 1182 | | for (self.base.options.objects) |obj| { |
| 1183 | | if (obj.must_link) { |
| 1184 | | argv.appendAssumeCapacity(try allocPrint(arena, "-WHOLEARCHIVE:{s}", .{obj.path})); |
| 1185 | | } else { |
| 1186 | | argv.appendAssumeCapacity(obj.path); |
| 1187 | | } |
| 1188 | | } |
| 1441 | inline fn getSizeOfHeaders(self: Coff) u32 { |
| 1442 | const msdos_hdr_size = msdos_stub.len + 4; |
| 1443 | return @intCast(u32, msdos_hdr_size + @sizeOf(coff.CoffHeader) + self.getOptionalHeaderSize() + |
| 1444 | self.getDataDirectoryHeadersSize() + self.getSectionHeadersSize()); |
| 1445 | } |
| 1189 | 1446 | |
| 1190 | | for (comp.c_object_table.keys()) |key| { |
| 1191 | | try argv.append(key.status.success.object_path); |
| 1192 | | } |
| 1447 | inline fn getOptionalHeaderSize(self: Coff) u32 { |
| 1448 | return switch (self.ptr_width) { |
| 1449 | .p32 => @intCast(u32, @sizeOf(coff.OptionalHeaderPE32)), |
| 1450 | .p64 => @intCast(u32, @sizeOf(coff.OptionalHeaderPE64)), |
| 1451 | }; |
| 1452 | } |
| 1193 | 1453 | |
| 1194 | | if (module_obj_path) |p| { |
| 1195 | | try argv.append(p); |
| 1196 | | } |
| 1454 | inline fn getDataDirectoryHeadersSize(self: Coff) u32 { |
| 1455 | return @intCast(u32, self.data_directories.len * @sizeOf(coff.ImageDataDirectory)); |
| 1456 | } |
| 1197 | 1457 | |
| 1198 | | const resolved_subsystem: ?std.Target.SubSystem = blk: { |
| 1199 | | if (self.base.options.subsystem) |explicit| break :blk explicit; |
| 1200 | | switch (target.os.tag) { |
| 1201 | | .windows => { |
| 1202 | | if (self.base.options.module) |module| { |
| 1203 | | if (module.stage1_flags.have_dllmain_crt_startup or is_dyn_lib) |
| 1204 | | break :blk null; |
| 1205 | | if (module.stage1_flags.have_c_main or self.base.options.is_test or |
| 1206 | | module.stage1_flags.have_winmain_crt_startup or |
| 1207 | | module.stage1_flags.have_wwinmain_crt_startup) |
| 1208 | | { |
| 1209 | | break :blk .Console; |
| 1210 | | } |
| 1211 | | if (module.stage1_flags.have_winmain or module.stage1_flags.have_wwinmain) |
| 1212 | | break :blk .Windows; |
| 1213 | | } |
| 1214 | | }, |
| 1215 | | .uefi => break :blk .EfiApplication, |
| 1216 | | else => {}, |
| 1217 | | } |
| 1218 | | break :blk null; |
| 1219 | | }; |
| 1458 | inline fn getSectionHeadersSize(self: Coff) u32 { |
| 1459 | return @intCast(u32, self.sections.slice().len * @sizeOf(coff.SectionHeader)); |
| 1460 | } |
| 1220 | 1461 | |
| 1221 | | const Mode = enum { uefi, win32 }; |
| 1222 | | const mode: Mode = mode: { |
| 1223 | | if (resolved_subsystem) |subsystem| { |
| 1224 | | const subsystem_suffix = ss: { |
| 1225 | | if (self.base.options.major_subsystem_version) |major| { |
| 1226 | | if (self.base.options.minor_subsystem_version) |minor| { |
| 1227 | | break :ss try allocPrint(arena, ",{d}.{d}", .{ major, minor }); |
| 1228 | | } else { |
| 1229 | | break :ss try allocPrint(arena, ",{d}", .{major}); |
| 1230 | | } |
| 1231 | | } |
| 1232 | | break :ss ""; |
| 1233 | | }; |
| 1234 | | |
| 1235 | | switch (subsystem) { |
| 1236 | | .Console => { |
| 1237 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:console{s}", .{ |
| 1238 | | subsystem_suffix, |
| 1239 | | })); |
| 1240 | | break :mode .win32; |
| 1241 | | }, |
| 1242 | | .EfiApplication => { |
| 1243 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:efi_application{s}", .{ |
| 1244 | | subsystem_suffix, |
| 1245 | | })); |
| 1246 | | break :mode .uefi; |
| 1247 | | }, |
| 1248 | | .EfiBootServiceDriver => { |
| 1249 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:efi_boot_service_driver{s}", .{ |
| 1250 | | subsystem_suffix, |
| 1251 | | })); |
| 1252 | | break :mode .uefi; |
| 1253 | | }, |
| 1254 | | .EfiRom => { |
| 1255 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:efi_rom{s}", .{ |
| 1256 | | subsystem_suffix, |
| 1257 | | })); |
| 1258 | | break :mode .uefi; |
| 1259 | | }, |
| 1260 | | .EfiRuntimeDriver => { |
| 1261 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:efi_runtime_driver{s}", .{ |
| 1262 | | subsystem_suffix, |
| 1263 | | })); |
| 1264 | | break :mode .uefi; |
| 1265 | | }, |
| 1266 | | .Native => { |
| 1267 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:native{s}", .{ |
| 1268 | | subsystem_suffix, |
| 1269 | | })); |
| 1270 | | break :mode .win32; |
| 1271 | | }, |
| 1272 | | .Posix => { |
| 1273 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:posix{s}", .{ |
| 1274 | | subsystem_suffix, |
| 1275 | | })); |
| 1276 | | break :mode .win32; |
| 1277 | | }, |
| 1278 | | .Windows => { |
| 1279 | | try argv.append(try allocPrint(arena, "-SUBSYSTEM:windows{s}", .{ |
| 1280 | | subsystem_suffix, |
| 1281 | | })); |
| 1282 | | break :mode .win32; |
| 1283 | | }, |
| 1284 | | } |
| 1285 | | } else if (target.os.tag == .uefi) { |
| 1286 | | break :mode .uefi; |
| 1287 | | } else { |
| 1288 | | break :mode .win32; |
| 1289 | | } |
| 1290 | | }; |
| 1462 | inline fn getDataDirectoryHeadersOffset(self: Coff) u32 { |
| 1463 | const msdos_hdr_size = msdos_stub.len + 4; |
| 1464 | return @intCast(u32, msdos_hdr_size + @sizeOf(coff.CoffHeader) + self.getOptionalHeaderSize()); |
| 1465 | } |
| 1291 | 1466 | |
| 1292 | | switch (mode) { |
| 1293 | | .uefi => try argv.appendSlice(&[_][]const u8{ |
| 1294 | | "-BASE:0", |
| 1295 | | "-ENTRY:EfiMain", |
| 1296 | | "-OPT:REF", |
| 1297 | | "-SAFESEH:NO", |
| 1298 | | "-MERGE:.rdata=.data", |
| 1299 | | "-ALIGN:32", |
| 1300 | | "-NODEFAULTLIB", |
| 1301 | | "-SECTION:.xdata,D", |
| 1302 | | }), |
| 1303 | | .win32 => { |
| 1304 | | if (link_in_crt) { |
| 1305 | | if (target.abi.isGnu()) { |
| 1306 | | try argv.append("-lldmingw"); |
| 1307 | | |
| 1308 | | if (target.cpu.arch == .i386) { |
| 1309 | | try argv.append("-ALTERNATENAME:__image_base__=___ImageBase"); |
| 1310 | | } else { |
| 1311 | | try argv.append("-ALTERNATENAME:__image_base__=__ImageBase"); |
| 1312 | | } |
| 1313 | | |
| 1314 | | if (is_dyn_lib) { |
| 1315 | | try argv.append(try comp.get_libc_crt_file(arena, "dllcrt2.obj")); |
| 1316 | | if (target.cpu.arch == .i386) { |
| 1317 | | try argv.append("-ALTERNATENAME:__DllMainCRTStartup@12=_DllMainCRTStartup@12"); |
| 1318 | | } else { |
| 1319 | | try argv.append("-ALTERNATENAME:_DllMainCRTStartup=DllMainCRTStartup"); |
| 1320 | | } |
| 1321 | | } else { |
| 1322 | | try argv.append(try comp.get_libc_crt_file(arena, "crt2.obj")); |
| 1323 | | } |
| 1324 | | |
| 1325 | | try argv.append(try comp.get_libc_crt_file(arena, "mingw32.lib")); |
| 1326 | | try argv.append(try comp.get_libc_crt_file(arena, "mingwex.lib")); |
| 1327 | | try argv.append(try comp.get_libc_crt_file(arena, "msvcrt-os.lib")); |
| 1328 | | |
| 1329 | | for (mingw.always_link_libs) |name| { |
| 1330 | | if (!self.base.options.system_libs.contains(name)) { |
| 1331 | | const lib_basename = try allocPrint(arena, "{s}.lib", .{name}); |
| 1332 | | try argv.append(try comp.get_libc_crt_file(arena, lib_basename)); |
| 1333 | | } |
| 1334 | | } |
| 1335 | | } else { |
| 1336 | | const lib_str = switch (self.base.options.link_mode) { |
| 1337 | | .Dynamic => "", |
| 1338 | | .Static => "lib", |
| 1339 | | }; |
| 1340 | | const d_str = switch (self.base.options.optimize_mode) { |
| 1341 | | .Debug => "d", |
| 1342 | | else => "", |
| 1343 | | }; |
| 1344 | | switch (self.base.options.link_mode) { |
| 1345 | | .Static => try argv.append(try allocPrint(arena, "libcmt{s}.lib", .{d_str})), |
| 1346 | | .Dynamic => try argv.append(try allocPrint(arena, "msvcrt{s}.lib", .{d_str})), |
| 1347 | | } |
| 1348 | | |
| 1349 | | try argv.append(try allocPrint(arena, "{s}vcruntime{s}.lib", .{ lib_str, d_str })); |
| 1350 | | try argv.append(try allocPrint(arena, "{s}ucrt{s}.lib", .{ lib_str, d_str })); |
| 1351 | | |
| 1352 | | //Visual C++ 2015 Conformance Changes |
| 1353 | | //https://msdn.microsoft.com/en-us/library/bb531344.aspx |
| 1354 | | try argv.append("legacy_stdio_definitions.lib"); |
| 1355 | | |
| 1356 | | // msvcrt depends on kernel32 and ntdll |
| 1357 | | try argv.append("kernel32.lib"); |
| 1358 | | try argv.append("ntdll.lib"); |
| 1359 | | } |
| 1360 | | } else { |
| 1361 | | try argv.append("-NODEFAULTLIB"); |
| 1362 | | if (!is_lib) { |
| 1363 | | if (self.base.options.module) |module| { |
| 1364 | | if (module.stage1_flags.have_winmain_crt_startup) { |
| 1365 | | try argv.append("-ENTRY:WinMainCRTStartup"); |
| 1366 | | } else { |
| 1367 | | try argv.append("-ENTRY:wWinMainCRTStartup"); |
| 1368 | | } |
| 1369 | | } else { |
| 1370 | | try argv.append("-ENTRY:wWinMainCRTStartup"); |
| 1371 | | } |
| 1372 | | } |
| 1373 | | } |
| 1374 | | }, |
| 1375 | | } |
| 1467 | inline fn getSectionHeadersOffset(self: Coff) u32 { |
| 1468 | return self.getDataDirectoryHeadersOffset() + self.getDataDirectoryHeadersSize(); |
| 1469 | } |
| 1376 | 1470 | |
| 1377 | | // libc++ dep |
| 1378 | | if (self.base.options.link_libcpp) { |
| 1379 | | try argv.append(comp.libcxxabi_static_lib.?.full_object_path); |
| 1380 | | try argv.append(comp.libcxx_static_lib.?.full_object_path); |
| 1381 | | } |
| 1471 | inline fn getSizeOfImage(self: Coff) u32 { |
| 1472 | var image_size: u32 = mem.alignForwardGeneric(u32, self.getSizeOfHeaders(), self.page_size); |
| 1473 | for (self.sections.items(.header)) |header| { |
| 1474 | image_size += mem.alignForwardGeneric(u32, header.virtual_size, self.page_size); |
| 1475 | } |
| 1476 | return image_size; |
| 1477 | } |
| 1382 | 1478 | |
| 1383 | | // libunwind dep |
| 1384 | | if (self.base.options.link_libunwind) { |
| 1385 | | try argv.append(comp.libunwind_static_lib.?.full_object_path); |
| 1386 | | } |
| 1479 | /// Returns symbol location corresponding to the set entrypoint (if any). |
| 1480 | pub fn getEntryPoint(self: Coff) ?SymbolWithLoc { |
| 1481 | const entry_name = self.base.options.entry orelse "_start"; // TODO this is incomplete |
| 1482 | return self.globals.get(entry_name); |
| 1483 | } |
| 1387 | 1484 | |
| 1388 | | if (is_exe_or_dyn_lib and !self.base.options.skip_linker_dependencies) { |
| 1389 | | if (!self.base.options.link_libc) { |
| 1390 | | if (comp.libc_static_lib) |lib| { |
| 1391 | | try argv.append(lib.full_object_path); |
| 1392 | | } |
| 1393 | | } |
| 1394 | | // MinGW doesn't provide libssp symbols |
| 1395 | | if (target.abi.isGnu()) { |
| 1396 | | if (comp.libssp_static_lib) |lib| { |
| 1397 | | try argv.append(lib.full_object_path); |
| 1398 | | } |
| 1399 | | } |
| 1400 | | // MSVC compiler_rt is missing some stuff, so we build it unconditionally but |
| 1401 | | // and rely on weak linkage to allow MSVC compiler_rt functions to override ours. |
| 1402 | | if (comp.compiler_rt_lib) |lib| { |
| 1403 | | try argv.append(lib.full_object_path); |
| 1404 | | } |
| 1405 | | } |
| 1485 | /// Returns pointer-to-symbol described by `sym_with_loc` descriptor. |
| 1486 | pub fn getSymbolPtr(self: *Coff, sym_loc: SymbolWithLoc) *coff.Symbol { |
| 1487 | assert(sym_loc.file == null); // TODO linking object files |
| 1488 | return &self.locals.items[sym_loc.sym_index]; |
| 1489 | } |
| 1406 | 1490 | |
| 1407 | | try argv.ensureUnusedCapacity(self.base.options.system_libs.count()); |
| 1408 | | for (self.base.options.system_libs.keys()) |key| { |
| 1409 | | const lib_basename = try allocPrint(arena, "{s}.lib", .{key}); |
| 1410 | | if (comp.crt_files.get(lib_basename)) |crt_file| { |
| 1411 | | argv.appendAssumeCapacity(crt_file.full_object_path); |
| 1412 | | continue; |
| 1413 | | } |
| 1414 | | if (try self.findLib(arena, lib_basename)) |full_path| { |
| 1415 | | argv.appendAssumeCapacity(full_path); |
| 1416 | | continue; |
| 1417 | | } |
| 1418 | | if (target.abi.isGnu()) { |
| 1419 | | const fallback_name = try allocPrint(arena, "lib{s}.dll.a", .{key}); |
| 1420 | | if (try self.findLib(arena, fallback_name)) |full_path| { |
| 1421 | | argv.appendAssumeCapacity(full_path); |
| 1422 | | continue; |
| 1423 | | } |
| 1424 | | } |
| 1425 | | log.err("DLL import library for -l{s} not found", .{key}); |
| 1426 | | return error.DllImportLibraryNotFound; |
| 1427 | | } |
| 1491 | /// Returns symbol described by `sym_with_loc` descriptor. |
| 1492 | pub fn getSymbol(self: *const Coff, sym_loc: SymbolWithLoc) *const coff.Symbol { |
| 1493 | assert(sym_loc.file == null); // TODO linking object files |
| 1494 | return &self.locals.items[sym_loc.sym_index]; |
| 1495 | } |
| 1428 | 1496 | |
| 1429 | | if (self.base.options.verbose_link) { |
| 1430 | | // Skip over our own name so that the LLD linker name is the first argv item. |
| 1431 | | Compilation.dump_argv(argv.items[1..]); |
| 1432 | | } |
| 1497 | /// Returns name of the symbol described by `sym_with_loc` descriptor. |
| 1498 | pub fn getSymbolName(self: *const Coff, sym_loc: SymbolWithLoc) []const u8 { |
| 1499 | assert(sym_loc.file == null); // TODO linking object files |
| 1500 | const sym = self.getSymbol(sym_loc); |
| 1501 | const offset = sym.getNameOffset() orelse return sym.getName().?; |
| 1502 | return self.strtab.get(offset).?; |
| 1503 | } |
| 1433 | 1504 | |
| 1434 | | if (std.process.can_spawn) { |
| 1435 | | // If possible, we run LLD as a child process because it does not always |
| 1436 | | // behave properly as a library, unfortunately. |
| 1437 | | // https://github.com/ziglang/zig/issues/3825 |
| 1438 | | var child = std.ChildProcess.init(argv.items, arena); |
| 1439 | | if (comp.clang_passthrough_mode) { |
| 1440 | | child.stdin_behavior = .Inherit; |
| 1441 | | child.stdout_behavior = .Inherit; |
| 1442 | | child.stderr_behavior = .Inherit; |
| 1443 | | |
| 1444 | | const term = child.spawnAndWait() catch |err| { |
| 1445 | | log.err("unable to spawn {s}: {s}", .{ argv.items[0], @errorName(err) }); |
| 1446 | | return error.UnableToSpawnSelf; |
| 1447 | | }; |
| 1448 | | switch (term) { |
| 1449 | | .Exited => |code| { |
| 1450 | | if (code != 0) { |
| 1451 | | std.process.exit(code); |
| 1452 | | } |
| 1453 | | }, |
| 1454 | | else => std.process.abort(), |
| 1455 | | } |
| 1456 | | } else { |
| 1457 | | child.stdin_behavior = .Ignore; |
| 1458 | | child.stdout_behavior = .Ignore; |
| 1459 | | child.stderr_behavior = .Pipe; |
| 1460 | | |
| 1461 | | try child.spawn(); |
| 1462 | | |
| 1463 | | const stderr = try child.stderr.?.reader().readAllAlloc(arena, 10 * 1024 * 1024); |
| 1464 | | |
| 1465 | | const term = child.wait() catch |err| { |
| 1466 | | log.err("unable to spawn {s}: {s}", .{ argv.items[0], @errorName(err) }); |
| 1467 | | return error.UnableToSpawnSelf; |
| 1468 | | }; |
| 1469 | | |
| 1470 | | switch (term) { |
| 1471 | | .Exited => |code| { |
| 1472 | | if (code != 0) { |
| 1473 | | // TODO parse this output and surface with the Compilation API rather than |
| 1474 | | // directly outputting to stderr here. |
| 1475 | | std.debug.print("{s}", .{stderr}); |
| 1476 | | return error.LLDReportedFailure; |
| 1477 | | } |
| 1478 | | }, |
| 1479 | | else => { |
| 1480 | | log.err("{s} terminated with stderr:\n{s}", .{ argv.items[0], stderr }); |
| 1481 | | return error.LLDCrashed; |
| 1482 | | }, |
| 1483 | | } |
| 1505 | /// Returns atom if there is an atom referenced by the symbol described by `sym_with_loc` descriptor. |
| 1506 | /// Returns null on failure. |
| 1507 | pub fn getAtomForSymbol(self: *Coff, sym_loc: SymbolWithLoc) ?*Atom { |
| 1508 | assert(sym_loc.file == null); // TODO linking with object files |
| 1509 | return self.atom_by_index_table.get(sym_loc.sym_index); |
| 1510 | } |
| 1484 | 1511 | |
| 1485 | | if (stderr.len != 0) { |
| 1486 | | log.warn("unexpected LLD stderr:\n{s}", .{stderr}); |
| 1487 | | } |
| 1488 | | } |
| 1489 | | } else { |
| 1490 | | const exit_code = try lldMain(arena, argv.items, false); |
| 1491 | | if (exit_code != 0) { |
| 1492 | | if (comp.clang_passthrough_mode) { |
| 1493 | | std.process.exit(exit_code); |
| 1494 | | } else { |
| 1495 | | return error.LLDReportedFailure; |
| 1496 | | } |
| 1497 | | } |
| 1498 | | } |
| 1499 | | } |
| 1512 | /// Returns GOT atom that references `sym_with_loc` if one exists. |
| 1513 | /// Returns null otherwise. |
| 1514 | pub fn getGotAtomForSymbol(self: *Coff, sym_loc: SymbolWithLoc) ?*Atom { |
| 1515 | const got_index = self.got_entries.get(sym_loc) orelse return null; |
| 1516 | return self.atom_by_index_table.get(got_index); |
| 1517 | } |
| 1500 | 1518 | |
| 1501 | | if (!self.base.options.disable_lld_caching) { |
| 1502 | | // Update the file with the digest. If it fails we can continue; it only |
| 1503 | | // means that the next invocation will have an unnecessary cache miss. |
| 1504 | | Cache.writeSmallFile(directory.handle, id_symlink_basename, &digest) catch |err| { |
| 1505 | | log.warn("failed to save linking hash digest file: {s}", .{@errorName(err)}); |
| 1506 | | }; |
| 1507 | | // Again failure here only means an unnecessary cache miss. |
| 1508 | | man.writeManifest() catch |err| { |
| 1509 | | log.warn("failed to write cache manifest when linking: {s}", .{@errorName(err)}); |
| 1510 | | }; |
| 1511 | | // We hang on to this lock so that the output file path can be used without |
| 1512 | | // other processes clobbering it. |
| 1513 | | self.base.lock = man.toOwnedLock(); |
| 1519 | fn setSectionName(self: *Coff, header: *coff.SectionHeader, name: []const u8) !void { |
| 1520 | if (name.len <= 8) { |
| 1521 | mem.copy(u8, &header.name, name); |
| 1522 | mem.set(u8, header.name[name.len..], 0); |
| 1523 | return; |
| 1514 | 1524 | } |
| 1525 | const offset = try self.strtab.insert(self.base.allocator, name); |
| 1526 | const name_offset = fmt.bufPrint(&header.name, "/{d}", .{offset}) catch unreachable; |
| 1527 | mem.set(u8, header.name[name_offset.len..], 0); |
| 1515 | 1528 | } |
| 1516 | 1529 | |
| 1517 | | fn findLib(self: *Coff, arena: Allocator, name: []const u8) !?[]const u8 { |
| 1518 | | for (self.base.options.lib_dirs) |lib_dir| { |
| 1519 | | const full_path = try fs.path.join(arena, &.{ lib_dir, name }); |
| 1520 | | fs.cwd().access(full_path, .{}) catch |err| switch (err) { |
| 1521 | | error.FileNotFound => continue, |
| 1522 | | else => |e| return e, |
| 1523 | | }; |
| 1524 | | return full_path; |
| 1530 | fn setSymbolName(self: *Coff, symbol: *coff.Symbol, name: []const u8) !void { |
| 1531 | if (name.len <= 8) { |
| 1532 | mem.copy(u8, &symbol.name, name); |
| 1533 | mem.set(u8, symbol.name[name.len..], 0); |
| 1534 | return; |
| 1525 | 1535 | } |
| 1526 | | return null; |
| 1536 | const offset = try self.strtab.insert(self.base.allocator, name); |
| 1537 | mem.set(u8, symbol.name[0..4], 0); |
| 1538 | mem.writeIntLittle(u32, symbol.name[4..8], offset); |
| 1527 | 1539 | } |
| 1528 | 1540 | |
| 1529 | | pub fn getDeclVAddr( |
| 1530 | | self: *Coff, |
| 1531 | | decl_index: Module.Decl.Index, |
| 1532 | | reloc_info: link.File.RelocInfo, |
| 1533 | | ) !u64 { |
| 1534 | | _ = reloc_info; |
| 1535 | | const mod = self.base.options.module.?; |
| 1536 | | const decl = mod.declPtr(decl_index); |
| 1537 | | assert(self.llvm_object == null); |
| 1538 | | return self.text_section_virtual_address + decl.link.coff.text_offset; |
| 1541 | fn logSymAttributes(sym: *const coff.Symbol, buf: *[4]u8) []const u8 { |
| 1542 | mem.set(u8, buf[0..4], '_'); |
| 1543 | switch (sym.section_number) { |
| 1544 | .UNDEFINED => { |
| 1545 | buf[3] = 'u'; |
| 1546 | switch (sym.storage_class) { |
| 1547 | .EXTERNAL => buf[1] = 'e', |
| 1548 | .WEAK_EXTERNAL => buf[1] = 'w', |
| 1549 | .NULL => {}, |
| 1550 | else => unreachable, |
| 1551 | } |
| 1552 | }, |
| 1553 | .ABSOLUTE => unreachable, // handle ABSOLUTE |
| 1554 | .DEBUG => unreachable, |
| 1555 | else => { |
| 1556 | buf[0] = 's'; |
| 1557 | switch (sym.storage_class) { |
| 1558 | .EXTERNAL => buf[1] = 'e', |
| 1559 | .WEAK_EXTERNAL => buf[1] = 'w', |
| 1560 | .NULL => {}, |
| 1561 | else => unreachable, |
| 1562 | } |
| 1563 | }, |
| 1564 | } |
| 1565 | return buf[0..]; |
| 1539 | 1566 | } |
| 1540 | 1567 | |
| 1541 | | pub fn updateDeclLineNumber(self: *Coff, module: *Module, decl: *Module.Decl) !void { |
| 1542 | | _ = self; |
| 1543 | | _ = module; |
| 1544 | | _ = decl; |
| 1545 | | // TODO Implement this |
| 1546 | | } |
| 1568 | fn logSymtab(self: *Coff) void { |
| 1569 | var buf: [4]u8 = undefined; |
| 1570 | |
| 1571 | log.debug("symtab:", .{}); |
| 1572 | log.debug(" object(null)", .{}); |
| 1573 | for (self.locals.items) |*sym, sym_id| { |
| 1574 | const where = if (sym.section_number == .UNDEFINED) "ord" else "sect"; |
| 1575 | const def_index: u16 = switch (sym.section_number) { |
| 1576 | .UNDEFINED => 0, // TODO |
| 1577 | .ABSOLUTE => unreachable, // TODO |
| 1578 | .DEBUG => unreachable, // TODO |
| 1579 | else => @enumToInt(sym.section_number), |
| 1580 | }; |
| 1581 | log.debug(" %{d}: {?s} @{x} in {s}({d}), {s}", .{ |
| 1582 | sym_id, |
| 1583 | self.getSymbolName(.{ .sym_index = @intCast(u32, sym_id), .file = null }), |
| 1584 | sym.value, |
| 1585 | where, |
| 1586 | def_index, |
| 1587 | logSymAttributes(sym, &buf), |
| 1588 | }); |
| 1589 | } |
| 1547 | 1590 | |
| 1548 | | pub fn deinit(self: *Coff) void { |
| 1549 | | if (build_options.have_llvm) { |
| 1550 | | if (self.llvm_object) |llvm_object| llvm_object.destroy(self.base.allocator); |
| 1591 | log.debug("globals table:", .{}); |
| 1592 | for (self.globals.keys()) |name, id| { |
| 1593 | const value = self.globals.values()[id]; |
| 1594 | log.debug(" {s} => %{d} in object({?d})", .{ name, value.sym_index, value.file }); |
| 1551 | 1595 | } |
| 1552 | 1596 | |
| 1553 | | self.text_block_free_list.deinit(self.base.allocator); |
| 1554 | | self.offset_table.deinit(self.base.allocator); |
| 1555 | | self.offset_table_free_list.deinit(self.base.allocator); |
| 1597 | log.debug("GOT entries:", .{}); |
| 1598 | for (self.got_entries.keys()) |target, i| { |
| 1599 | const got_sym = self.getSymbol(.{ .sym_index = self.got_entries.values()[i], .file = null }); |
| 1600 | const target_sym = self.getSymbol(target); |
| 1601 | if (target_sym.section_number == .UNDEFINED) { |
| 1602 | log.debug(" {d}@{x} => import('{s}')", .{ |
| 1603 | i, |
| 1604 | got_sym.value, |
| 1605 | self.getSymbolName(target), |
| 1606 | }); |
| 1607 | } else { |
| 1608 | log.debug(" {d}@{x} => local(%{d}) in object({?d}) {s}", .{ |
| 1609 | i, |
| 1610 | got_sym.value, |
| 1611 | target.sym_index, |
| 1612 | target.file, |
| 1613 | logSymAttributes(target_sym, &buf), |
| 1614 | }); |
| 1615 | } |
| 1616 | } |
| 1556 | 1617 | } |
Jakub Konka <kubkon@jakubkonka.com> 2022-08-30 14:29:41+02:00
GitHub <noreply@github.com> 2022-08-30 14:29:41+02:00
Signed by PGP key 4AEE18F83AFDEB23
src