Mercurial > pub > dyncall > dyncall
view dyncallback/dyncall_callback_x86.S @ 472:e5820b7a3fbc
doc:
- some more plan 9 disas examples
- x86 callconv doc updated:
* mainly info about aggregate passing and returning
* removing section about pascal calling convention, as dyncall doesn't support 16bit abis
- some cleanups
author | Tassilo Philipp |
---|---|
date | Thu, 10 Feb 2022 17:32:05 +0100 |
parents | f5577f6bf97a |
children |
line wrap: on
line source
/* Package: dyncall Library: dyncallback File: dyncallback/dyncall_callback_x86.S Description: Callback Thunk entry for x86 License: Copyright (c) 2011-2018 Daniel Adler <dadler@uni-goettingen.de> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "../portasm/portasm-x86.S" #include "../dyncall/dyncall_macros.h" BEGIN_ASM DCThunk_size = 16 DCArgs_size = 20 DCValue_size = 8 CTX_thunk = 0 CTX_phandler = 16 CTX_pargsvt = 20 CTX_stack_cleanup = 24 CTX_userdata = 28 frame_arg0 = 8 frame_ret = 4 frame_parent = 0 frame_CTX = -4 frame_DCArgs = -24 frame_DCValue = -32 #define ASCII_L 76 #define ASCII_l 108 #define ASCII_d 100 #define ASCII_f 102 #define ASCII_i 105 #define ASCII_v 118 GLOBAL(dcCallbackThunkEntry) BEGIN_PROC(dcCallbackThunkEntry) PUSH(EBP) MOVL(ESP,EBP) /* local variable frame_CTX) */ PUSH(EAX) /* EAX = CTX* */ /* initialize DCArgs */ PUSH(LIT(0)) /* fast_count */ PUSH(EDX) /* fast_data[1] */ PUSH(ECX) /* fast_data[0] */ LEA(DWORD(EBP,frame_arg0),ECX) /* compute arg stack address */ PUSH(ECX) /* stack-ptr */ PUSH(DWORD(EAX,CTX_pargsvt)) /* vtbl-ptr */ MOVL(ESP,ECX) /* ECX = DCArgs* */ /* initialize DCvalue */ PUSH(LIT(0)) PUSH(LIT(0)) MOVL(ESP,EDX) /* EDX = DCValue* */ ANDL(LIT(-16),ESP) /* align stack to 16 bytes. */ /* call handler(context) */ PUSH(DWORD(EAX,CTX_userdata)) /* userdata */ PUSH(EDX) /* DCValue* */ PUSH(ECX) /* DCargs* */ PUSH(EAX) /* DCCallback* */ CALL_DWORD(EAX,CTX_phandler) /* cleanup stack */ MOVL(EBP,ESP) /* reset esp to frame */ POP(ECX) /* skip parent frame */ POP(ECX) /* pop return address */ MOVL(DWORD(EBP,frame_CTX),EDX) ADD(DWORD(EDX,CTX_stack_cleanup),ESP) /* cleanup stack */ PUSH(ECX) /* push back return address */ LEA(DWORD(EBP,frame_DCValue), EDX) MOVL(DWORD(EBP,0), EBP) /* EBP = parent frame */ /* handle return value */ #if !defined(DC__OS_Minix) CMP(LIT(ASCII_f),AL) JE(LOCAL(return_f32)) CMP(LIT(ASCII_d),AL) JE(LOCAL(return_f64)) #endif /* All int cases (+ pointer & string cases) fall in the return_i64 case, here */ LOCAL(return_i64): MOVL(DWORD(EDX,0),EAX) MOVL(DWORD(EDX,4),EDX) RET() LOCAL(return_f32): FLDS(DWORD(EDX,0)) RET() LOCAL(return_f64): FLDL(QWORD(EDX,0)) LOCAL(return_void): RET() END_PROC(dcCallbackThunkEntry) END_ASM