diff options
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/sys_darwin_arm64.s | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/runtime/sys_darwin_arm64.s b/src/runtime/sys_darwin_arm64.s index 3aac2d9215..10d8534359 100644 --- a/src/runtime/sys_darwin_arm64.s +++ b/src/runtime/sys_darwin_arm64.s @@ -483,7 +483,7 @@ ok: // C calling convention (use libcCall). TEXT runtime·syscall6(SB),NOSPLIT,$0 SUB $16, RSP // push structure pointer - MOVD R0, (RSP) + MOVD R0, 8(RSP) MOVD 0(R0), R12 // fn MOVD 16(R0), R1 // a2 @@ -492,19 +492,25 @@ TEXT runtime·syscall6(SB),NOSPLIT,$0 MOVD 40(R0), R4 // a5 MOVD 48(R0), R5 // a6 MOVD 8(R0), R0 // a1 + + // If fn is declared as vararg, we have to pass the vararg arguments on the stack. + // See syscall above. The only function this applies to is openat, for which the 4th + // arg must be on the stack. + MOVD R3, (RSP) + BL (R12) - MOVD (RSP), R2 // pop structure pointer + MOVD 8(RSP), R2 // pop structure pointer ADD $16, RSP MOVD R0, 56(R2) // save r1 MOVD R1, 64(R2) // save r2 CMPW $-1, R0 BNE ok SUB $16, RSP // push structure pointer - MOVD R2, (RSP) + MOVD R2, 8(RSP) BL libc_error(SB) MOVW (R0), R0 - MOVD (RSP), R2 // pop structure pointer + MOVD 8(RSP), R2 // pop structure pointer ADD $16, RSP MOVD R0, 72(R2) // save err ok: |