diff options
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/sys_aix_ppc64.s | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/runtime/sys_aix_ppc64.s b/src/runtime/sys_aix_ppc64.s index c171c191c0..217ebb8878 100644 --- a/src/runtime/sys_aix_ppc64.s +++ b/src/runtime/sys_aix_ppc64.s @@ -25,7 +25,12 @@ TEXT callCfunction<>(SB), NOSPLIT|NOFRAME,$0 // stored in libcall_fn and store the results in libcall struture // Up to 6 arguments can be passed to this C function // Called by runtime.asmcgocall -// It reserves a stack of 288 bytes for the C function. +// It reserves a stack of 288 bytes for the C function. It must +// follow AIX convention, thus the first local variable must +// be stored at the offset 112, after the linker area (48 bytes) +// and the argument area (64). +// The AIX convention is described here: +// https://www.ibm.com/docs/en/aix/7.2?topic=overview-runtime-process-stack // NOT USING GO CALLING CONVENTION // runtime.asmsyscall6 is a function descriptor to the real asmsyscall6. DATA runtime·asmsyscall6+0(SB)/8, $asmsyscall6<>(SB) @@ -34,7 +39,8 @@ DATA runtime·asmsyscall6+16(SB)/8, $0 GLOBL runtime·asmsyscall6(SB), NOPTR, $24 TEXT asmsyscall6<>(SB),NOSPLIT,$256 - MOVD R3, 48(R1) // Save libcall for later + // Save libcall for later + MOVD R3, 112(R1) MOVD libcall_fn(R3), R12 MOVD libcall_args(R3), R9 MOVD 0(R9), R3 @@ -50,7 +56,7 @@ TEXT asmsyscall6<>(SB),NOSPLIT,$256 MOVD 40(R1), R2 // Store result in libcall - MOVD 48(R1), R5 + MOVD 112(R1), R5 MOVD R3, (libcall_r1)(R5) MOVD $-1, R6 CMP R6, R3 |