authorgravatar for koachan@protonmail.comKoakuma <koachan@protonmail.com> 2020-10-25 21:51:01+07:00
committergravatar for koachan@protonmail.comKoakuma <koachan@protonmail.com> 2020-10-25 21:51:01+07:00
log5474d4338905e8535b13391f952830a15bc5eaeb
treebf58719e90664b62b5ccde07b442bf1cfc3f223d
parent1a362ea5b032d7e7f0300e0d9ace1b36b164576c

Zero %i6 to terminate backchain

1 files changed, 4 insertions(+), 7 deletions(-)

lib/std/start.zig+4-7
...@@ -148,13 +148,10 @@ fn _start() callconv(.Naked) noreturn {...@@ -148,13 +148,10 @@ fn _start() callconv(.Naked) noreturn {
148 );148 );
149 },149 },
150 .sparcv9 => {150 .sparcv9 => {
151 // On sparc64, the stack pointer register points to a place151 // argc is stored after a register window (16 registers) plus stack bias
152 // 2047 bytes below the actual stack. Also, argc and friends are152 starting_stack_ptr = asm (
153 // placed starting at [stack-start + 128], so we need to account for that too.153 \\ mov %%g0, %%i6
154 // Ref: System V Application Binary Interface: SPARC Version 9 Processor Supplement154 \\ add %%o6, 2175, %[argc]
155 // Version 1.35, figure 3-16.
156 // TODO: find a better way to do this.
157 starting_stack_ptr = asm ("add %%o6, 2175, %[argc]"
158 : [argc] "=r" (-> [*]usize)155 : [argc] "=r" (-> [*]usize)
159 );156 );
160 },157 },