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| author | Ken Thompson <ken@golang.org> | 2009-01-27 12:03:53 -0800 |
|---|---|---|
| committer | Ken Thompson <ken@golang.org> | 2009-01-27 12:03:53 -0800 |
| commit | 1e1cc4eb570aa6fec645ff4faf13431847b99db8 (patch) | |
| tree | bbbf12c48e9ab2d82b89e6a0adf15f15757e57af /src/runtime/rt0_amd64.s | |
| parent | 4a903e0b32be5a590880ceb7379e68790602c29d (diff) | |
| download | go-1e1cc4eb570aa6fec645ff4faf13431847b99db8.tar.xz | |
defer
R=r
OCL=23592
CL=23592
Diffstat (limited to 'src/runtime/rt0_amd64.s')
| -rw-r--r-- | src/runtime/rt0_amd64.s | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/runtime/rt0_amd64.s b/src/runtime/rt0_amd64.s index 8588d61a4e..f8d4a381b3 100644 --- a/src/runtime/rt0_amd64.s +++ b/src/runtime/rt0_amd64.s @@ -120,7 +120,7 @@ TEXT setspgoto(SB), 7, $0 // if(*val == old){ // *val = new; // return 1; -// }else +// } else // return 0; TEXT cas(SB), 7, $0 MOVQ 8(SP), BX @@ -133,3 +133,13 @@ TEXT cas(SB), 7, $0 RET MOVL $1, AX RET + +// void jmpdefer(byte*); +// 1. pop the caller +// 2. sub 5 bytes from the callers return +// 3. jmp to the argument +TEXT jmpdefer(SB), 7, $0 + MOVQ 8(SP), AX // function + ADDQ $(8+56), SP // pop saved PC and callers frame + SUBQ $5, (SP) // reposition his return address + JMP AX // and goto function |