diff options
Diffstat (limited to 'src/runtime/asm_s390x.s')
| -rw-r--r-- | src/runtime/asm_s390x.s | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/runtime/asm_s390x.s b/src/runtime/asm_s390x.s index d4110d563f..534cb6112c 100644 --- a/src/runtime/asm_s390x.s +++ b/src/runtime/asm_s390x.s @@ -480,6 +480,21 @@ TEXT callfnMVC<>(SB),NOSPLIT|NOFRAME,$0-0 TEXT runtime·procyield(SB),NOSPLIT,$0-0 RET +// void jmpdefer(fv, sp); +// called from deferreturn. +// 1. grab stored LR for caller +// 2. sub 6 bytes to get back to BL deferreturn (size of BRASL instruction) +// 3. BR to fn +TEXT runtime·jmpdefer(SB),NOSPLIT|NOFRAME,$0-16 + MOVD 0(R15), R1 + SUB $6, R1, LR + + MOVD fv+0(FP), R12 + MOVD argp+8(FP), R15 + SUB $8, R15 + MOVD 0(R12), R3 + BR (R3) + // Save state of caller into g->sched, // but using fake PC from systemstack_switch. // Must only be called from functions with no locals ($0) |