Commit e701ac1a51e6f1d39b698b9b258c349b902dd848 | zig

author	Andrew Kelley <andrew@ziglang.org> 2020-11-29 10:33:43-08:00
committer	GitHub <noreply@github.com> 2020-11-29 10:33:43-08:00
log	e701ac1a51e6f1d39b698b9b258c349b902dd848
tree	5260c0b1787f3aac72858164f7e50c81e40fb025
parent	89ee4b86210dd3292f39e8ab405834a11865833c
parent	f10bff9ffb452eaf22af8dd85412653ac8bd1081
signature	Signed by PGP key 4AEE18F83AFDEB23

Add "long double" mapping and implement fork() on Linux/sparc64

3 files changed, 29 insertions(+), 1 deletions(-)

lib/std/os/linux.zig+3-1

...	...	@@ -112,7 +112,9 @@ pub fn execve(path: [:0]const u8, argv: [:null]const ?[:0]const u8, envp: [:
112	112	}
113	113
114	114	pub fn fork() usize {
115		if (@hasField(SYS, "fork")) {
	115	if (comptime builtin.arch.isSPARC()) {
	116	return syscall_fork();
	117	} else if (@hasField(SYS, "fork")) {
116	118	return syscall0(.fork);
117	119	} else {
118	120	return syscall2(.clone, SIGCHLD, 0);

lib/std/os/linux/sparc64.zig+23

...	...	@@ -21,6 +21,29 @@ pub fn syscall_pipe(fd: *[2]i32) usize {
21	21	);
22	22	}
23	23
	24	pub fn syscall_fork() usize {
	25	// Linux/sparc64 fork() returns two values in %o0 and %o1:
	26	// - On the parent's side, %o0 is the child's PID and %o1 is 0.
	27	// - On the child's side, %o0 is the parent's PID and %o1 is 1.
	28	// We need to clear the child's %o0 so that the return values
	29	// conform to the libc convention.
	30	return asm volatile (
	31	\\ t 0x6d
	32	\\ bcc,pt %%xcc, 1f
	33	\\ nop
	34	\\ ba 2f
	35	\\ neg %%o0
	36	\\ 1:
	37	\\ # Clear the child's %%o0
	38	\\ dec %%o1
	39	\\ and %%o1, %%o0, %%o0
	40	\\ 2:
	41	: [ret] "={o0}" (-> usize)
	42	: [number] "{g1}" (@enumToInt(SYS.fork))
	43	: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
	44	);
	45	}
	46
24	47	pub fn syscall0(number: SYS) usize {
25	48	return asm volatile (
26	49	\\ t 0x6d

src/stage1/codegen.cpp+3

...	...	@@ -8640,6 +8640,9 @@ static void define_builtin_types(CodeGen *g) {
8640	8640	case ZigLLVM_ppc64le:
8641	8641	add_fp_entry(g, "c_longdouble", 128, LLVMFP128Type(), &g->builtin_types.entry_c_longdouble);
8642	8642	break;
	8643	case ZigLLVM_sparcv9:
	8644	add_fp_entry(g, "c_longdouble", 128, LLVMFP128Type(), &g->builtin_types.entry_c_longdouble);
	8645	break;
8643	8646	case ZigLLVM_avr:
8644	8647	// It's either a float or a double, depending on a toolchain switch
8645	8648	add_fp_entry(g, "c_longdouble", 64, LLVMDoubleType(), &g->builtin_types.entry_c_longdouble);