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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_arm.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_arm.s')
| -rw-r--r-- | src/runtime/sys_linux_arm.s | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/runtime/sys_linux_arm.s b/src/runtime/sys_linux_arm.s index 992d32ab6c..44b56ccb9f 100644 --- a/src/runtime/sys_linux_arm.s +++ b/src/runtime/sys_linux_arm.s @@ -30,6 +30,7 @@ #define SYS_sigaltstack (SYS_BASE + 186) #define SYS_mmap2 (SYS_BASE + 192) #define SYS_futex (SYS_BASE + 240) +#define SYS_futex_time64 (SYS_BASE + 422) #define SYS_exit_group (SYS_BASE + 248) #define SYS_munmap (SYS_BASE + 91) #define SYS_madvise (SYS_BASE + 220) @@ -403,9 +404,10 @@ finish: 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 MOVW addr+0(FP), R0 MOVW op+4(FP), R1 MOVW val+8(FP), R2 @@ -417,6 +419,21 @@ TEXT runtime·futex(SB),NOSPLIT,$0 MOVW R0, 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 + MOVW addr+0(FP), R0 + MOVW op+4(FP), R1 + MOVW val+8(FP), R2 + MOVW ts+12(FP), R3 + MOVW addr2+16(FP), R4 + MOVW val3+20(FP), R5 + MOVW $SYS_futex_time64, R7 + SWI $0 + MOVW R0, ret+24(FP) + RET + // int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void)); TEXT runtime·clone(SB),NOSPLIT,$0 MOVW flags+0(FP), R0 |