Mercurial > pub > dyncall > dyncall
comparison doc/disas_examples/x86.fastcall_borland.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 | b74d7a249642 |
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| 326:09aaa2e774cd | 327:c0390dc85a07 |
|---|---|
| 1 ; #pragma pack(push, 1) | |
| 2 ; struct TTest | |
| 3 ; { | |
| 4 ; __int32 i1; | |
| 5 ; __int32 i2; | |
| 6 ; }; | |
| 7 ; #pragma pack(pop) | |
| 8 ; | |
| 9 ; TTest __fastcall DoTest() | |
| 10 ; { | |
| 11 ; TTest t; | |
| 12 ; t.i1 = 1; | |
| 13 ; t.i2 = 2; | |
| 14 ; return t; | |
| 15 ; } | |
| 16 ; | |
| 17 ; ... | |
| 18 ; TTest t = DoTest(); | |
| 19 | |
| 20 ; from http://codeverge.com/embarcadero.cppbuilder.cpp/does-fastcall-have-any-bearing-on/1043767 | |
| 21 | |
| 22 | |
| 23 DoTest(): | |
| 24 push ebp ; | | |
| 25 mov ebp,esp ; | prolog | |
| 26 add esp,-0x0c ; | | |
| 27 mov [ebp-0x04],eax ; pointer to hidden param in eax -> local area | |
| 28 mov [ebp-0x0c],0x00000001 ; val 1 -> local area | |
| 29 mov [ebp-0x08],0x00000002 ; val 2 -> local area | |
| 30 mov eax,[ebp-0x04] ; refetch eax (pointlessly) | |
| 31 mov edx,[ebp-0x0c] ; get val 1 in edx and ... | |
| 32 mov [eax],edx ; ... store at *eax | |
| 33 mov edx,[ebp-0x08] ; get val 2 in edx and ... | |
| 34 mov [eax+0x04],edx ; ... store at *(eax + 4) | |
| 35 mov eax, [ebp-0x04] ; return value | |
| 36 mov esp,ebp ; | | |
| 37 pop ebp ; | epilog | |
| 38 ret ; | | |
| 39 | |
| 40 ; vim: ft=asm | |
| 41 |