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| author | Daniel Maslowski <info@orangecms.org> | 2025-09-18 15:43:42 +0000 |
|---|---|---|
| committer | Jorropo <jorropo.pgm@gmail.com> | 2025-09-18 21:04:12 -0700 |
| commit | 3cf1aaf8b9c846c44ec8db679495dd5816d1ec30 (patch) | |
| tree | c48799377d006b2e9d82ffd90699464cee224698 /src/runtime/sys_linux_386.s | |
| parent | 0ab038af6290c7fb52d4c26949d735692781b3d1 (diff) | |
| download | go-3cf1aaf8b9c846c44ec8db679495dd5816d1ec30.tar.xz | |
runtime: use futexes with 64-bit time on Linux
Linux introduced new syscalls to fix the year 2038 issue.
To still be able to use the old ones, the Kconfig option
COMPAT_32BIT_TIME would be necessary.
Use the new syscall with 64-bit values for futex by default.
Define _ENOSYS for detecting if it's not available.
Add a fallback to use the older syscall in case the new one is
not available, since Go runs on Linux from 2.6.32 on, per
https://go.dev/wiki/MinimumRequirements.
Updates #75133
Change-Id: I65daff0a3d06b55440ff05d8f5a9aa1c07eb201d
GitHub-Last-Rev: 96dd1bd84bd12d898e971157fc83da562cc4f6b4
GitHub-Pull-Request: golang/go#75306
Reviewed-on: https://go-review.googlesource.com/c/go/+/701615
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'src/runtime/sys_linux_386.s')
| -rw-r--r-- | src/runtime/sys_linux_386.s | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/runtime/sys_linux_386.s b/src/runtime/sys_linux_386.s index 8e832687e0..1c3f1ff3e6 100644 --- a/src/runtime/sys_linux_386.s +++ b/src/runtime/sys_linux_386.s @@ -48,6 +48,7 @@ #define SYS_madvise 219 #define SYS_gettid 224 #define SYS_futex 240 +#define SYS_futex_time64 422 #define SYS_sched_getaffinity 242 #define SYS_set_thread_area 243 #define SYS_exit_group 252 @@ -532,9 +533,10 @@ TEXT runtime·madvise(SB),NOSPLIT,$0 MOVL AX, ret+12(FP) RET +// Linux: kernel/futex/syscalls.c, requiring COMPAT_32BIT_TIME // int32 futex(int32 *uaddr, int32 op, int32 val, -// struct timespec *timeout, int32 *uaddr2, int32 val2); -TEXT runtime·futex(SB),NOSPLIT,$0 +// struct old_timespec32 *timeout, int32 *uaddr2, int32 val2); +TEXT runtime·futex_time32(SB),NOSPLIT,$0 MOVL $SYS_futex, AX MOVL addr+0(FP), BX MOVL op+4(FP), CX @@ -546,6 +548,21 @@ TEXT runtime·futex(SB),NOSPLIT,$0 MOVL AX, ret+24(FP) RET +// Linux: kernel/futex/syscalls.c +// int32 futex(int32 *uaddr, int32 op, int32 val, +// struct timespec *timeout, int32 *uaddr2, int32 val2); +TEXT runtime·futex_time64(SB),NOSPLIT,$0 + MOVL $SYS_futex_time64, AX + MOVL addr+0(FP), BX + MOVL op+4(FP), CX + MOVL val+8(FP), DX + MOVL ts+12(FP), SI + MOVL addr2+16(FP), DI + MOVL val3+20(FP), BP + INVOKE_SYSCALL + MOVL AX, ret+24(FP) + RET + // int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void)); TEXT runtime·clone(SB),NOSPLIT,$0 MOVL $SYS_clone, AX |