Mercurial > pub > dyncall > dyncall
diff doc/disas_examples/x86.plan9call.disas @ 327:c0390dc85a07
- doc: added disassembly examples for many platforms and calling conventions, for reference
| author | Tassilo Philipp |
|---|---|
| date | Fri, 22 Nov 2019 23:08:59 +0100 |
| parents | |
| children | 97fff5d9cea1 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/doc/disas_examples/x86.plan9call.disas Fri Nov 22 23:08:59 2019 +0100 @@ -0,0 +1,64 @@ +; void leaf_call(int a, int b, int c, int d, int e, int f) +; { +; } +; +; int nonleaf_call(int a, int b, int c, int d, int e, int f, int g) +; { +; leaf_call(b,c,d,e,f,g); +; return 'x'; +; } +; +; int main() +; { +; nonleaf_call(0,1,2,3,4,5,6); +; return 0; +; } + + + +; output from plan9-4th_edition-x86 w/ 8c x.c && 8l -a x.8 + +001020 (1) TEXT leaf_call+0(SB),$0 +001020 c3 (3) RET , + +001021 (5) TEXT nonleaf_call+0(SB),$28 +001021 83ec1c (5) SUBL $28,SP ; prolog (note, there is no register save area at all) +001024 8b442424 (7) MOVL b+36(FP),AX ; | +001028 890424 (7) MOVL AX,(SP) ; | +00102b 8b442428 (7) MOVL c+40(FP),AX ; | +00102f 89442404 (7) MOVL AX,4(SP) ; | +001033 8b44242c (7) MOVL d+44(FP),AX ; | +001037 89442408 (7) MOVL AX,8(SP) ; | fetch in args from prev frame's param area ... +00103b 8b442430 (7) MOVL e+48(FP),AX ; | ... and "push" onto stack +00103f 8944240c (7) MOVL AX,12(SP) ; | +001043 8b442434 (7) MOVL f+52(FP),AX ; | +001047 89442410 (7) MOVL AX,16(SP) ; | +00104b 8b442438 (7) MOVL g+56(FP),AX ; | +00104f 89442414 (7) MOVL AX,20(SP) ; | +001053 e8c8ffffff (7) CALL ,1020+leaf_call ; push return addrss and call +001058 b878000000 (8) MOVL $120,AX ; return value: 'x' -> eax +00105d 83c41c (8) ADDL $28,SP ; | +001060 c3 (8) RET , ; | epilog + +001061 (11) TEXT main+0(SB),$32 +001061 83ec20 (11) SUBL $32,SP ; prolog (note, there is no register save area at all) +001064 c7042400000000 (13) MOVL $0,(SP) ; arg 0 -> "push" onto stack +00106b b801000000 (13) MOVL $1,AX ; arg 1 -> eax, then ... +001070 89442404 (13) MOVL AX,4(SP) ; ... "pushed" onto stack +001074 b802000000 (13) MOVL $2,AX ; arg 2 -> eax, then ... +001079 89442408 (13) MOVL AX,8(SP) ; ... "pushed" onto stack +00107d b803000000 (13) MOVL $3,AX ; . +001082 8944240c (13) MOVL AX,12(SP) ; . +001086 b804000000 (13) MOVL $4,AX ; . +00108b 89442410 (13) MOVL AX,16(SP) ; . +00108f b805000000 (13) MOVL $5,AX ; . +001094 89442414 (13) MOVL AX,20(SP) ; . +001098 b806000000 (13) MOVL $6,AX ; arg 6 -> eax, then ... +00109d 89442418 (13) MOVL AX,24(SP) ; ... "pushed" onto stack +0010a1 e87bffffff (13) CALL ,1021+nonleaf_call ; push return addrss and call +0010a6 31c0 (14) MOVL $0,AX ; return value +0010a8 83c420 (14) ADDL $32,SP ; | +0010ab c3 (14) RET , ; | epilog + +; vim: ft=asm +