diff options
Diffstat (limited to 'src/syscall/asm_linux_386.s')
| -rw-r--r-- | src/syscall/asm_linux_386.s | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/src/syscall/asm_linux_386.s b/src/syscall/asm_linux_386.s index c94060571b..228a542cf1 100644 --- a/src/syscall/asm_linux_386.s +++ b/src/syscall/asm_linux_386.s @@ -12,18 +12,9 @@ // func Syscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); // Trap # in AX, args in BX CX DX SI DI, return in AX -// Most linux systems use glibc's dynamic linker, which puts the -// __kernel_vsyscall vdso helper at 0x10(GS) for easy access from position -// independent code and setldt in runtime does the same in the statically -// linked case. Android, however, uses bionic's dynamic linker, which does not -// save the helper anywhere, and so the only way to invoke a syscall from -// position independent code is boring old int $0x80 (which is also what -// bionic's syscall wrappers use). -#ifdef GOOS_android +// See ../runtime/sys_linux_386.s for the reason why we always use int 0x80 +// instead of the glibc-specific "CALL 0x10(GS)". #define INVOKE_SYSCALL INT $0x80 -#else -#define INVOKE_SYSCALL CALL 0x10(GS) -#endif TEXT ·Syscall(SB),NOSPLIT,$0-28 CALL runtime·entersyscall(SB) |