Mercurial > pub > dyncall > dyncall
view dyncallback/dyncall_callback_x86.c @ 188:44ae5b653086
- more endian detection in macros
author | Tassilo Philipp |
---|---|
date | Mon, 13 Mar 2017 13:23:10 +0100 |
parents | d48a8b8d2ef9 |
children | 030fbb70aa1b |
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/* Package: dyncall Library: dyncallback File: dyncallback/dyncall_callback_x86.c Description: Callback - Implementation for x86 License: Copyright (c) 2007-2016 Daniel Adler <dadler@uni-goettingen.de>, Tassilo Philipp <tphilipp@potion-studios.com> 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 "dyncall_callback.h" #include "dyncall_alloc_wx.h" #include "dyncall_thunk.h" #include "dyncall_args_x86.h" /* Callback symbol. */ extern void dcCallbackThunkEntry(); struct DCCallback { DCThunk thunk; /* offset 0, size 16 */ DCCallbackHandler* handler; /* offset 16 */ DCArgsVT* args_vt; /* offset 20 */ size_t stack_cleanup; /* offset 24 */ void* userdata; /* offset 28 */ }; /* compute stacksize for callee cleanup calling conventions: * * cdecl,stdcall,thiscall_ms,fastcall_ms,fastcall_gnu */ static int dcbCleanupSize_x86_cdecl(const char* signature) { return 0; } static int dcbCleanupSize_x86_std(const char* signature) { const char* ptr = signature; int size = 0; char ch; while( (ch = *ptr++) != DC_SIGCHAR_ENDARG ) { switch(ch) { case DC_SIGCHAR_BOOL: case DC_SIGCHAR_CHAR: case DC_SIGCHAR_SHORT: case DC_SIGCHAR_INT: case DC_SIGCHAR_LONG: case DC_SIGCHAR_POINTER: case DC_SIGCHAR_UCHAR: case DC_SIGCHAR_USHORT: case DC_SIGCHAR_UINT: case DC_SIGCHAR_ULONG: case DC_SIGCHAR_STRING: case DC_SIGCHAR_FLOAT: size += 4; break; case DC_SIGCHAR_DOUBLE: case DC_SIGCHAR_LONGLONG: case DC_SIGCHAR_ULONGLONG: size += 8; break; } } return size; } static int dcbCleanupSize_x86_this_ms(const char* signature) { const char* ptr = signature; int size = 0; char ch; while( (ch = *ptr++) != DC_SIGCHAR_ENDARG ) { switch(ch) { case DC_SIGCHAR_BOOL: case DC_SIGCHAR_CHAR: case DC_SIGCHAR_SHORT: case DC_SIGCHAR_INT: case DC_SIGCHAR_LONG: case DC_SIGCHAR_POINTER: case DC_SIGCHAR_UCHAR: case DC_SIGCHAR_USHORT: case DC_SIGCHAR_UINT: case DC_SIGCHAR_ULONG: case DC_SIGCHAR_STRING: case DC_SIGCHAR_FLOAT: size += 4; break; case DC_SIGCHAR_DOUBLE: case DC_SIGCHAR_LONGLONG: case DC_SIGCHAR_ULONGLONG: size += 8; break; } } return size; } static int dcbCleanupSize_x86_fast_ms(const char* signature) { const char* ptr = signature; int size = 0; int regs = 0; char ch; while( (ch = *ptr++) != DC_SIGCHAR_ENDARG ) { switch(ch) { case DC_SIGCHAR_BOOL: case DC_SIGCHAR_CHAR: case DC_SIGCHAR_SHORT: case DC_SIGCHAR_INT: case DC_SIGCHAR_LONG: case DC_SIGCHAR_POINTER: case DC_SIGCHAR_UCHAR: case DC_SIGCHAR_USHORT: case DC_SIGCHAR_UINT: case DC_SIGCHAR_ULONG: case DC_SIGCHAR_STRING: if (regs < 2) regs++; else size += 4; break; case DC_SIGCHAR_FLOAT: size += 4; break; case DC_SIGCHAR_DOUBLE: size += 8; break; case DC_SIGCHAR_LONGLONG: case DC_SIGCHAR_ULONGLONG: size += 8; break; } } return size; } static int dcbCleanupSize_x86_fast_gnu(const char* signature) { const char* ptr = signature; char ch; int size = 0; int regs = 0; while( (ch = *ptr++) != DC_SIGCHAR_ENDARG ) { switch(ch) { case DC_SIGCHAR_FLOAT: size += 4; break; case DC_SIGCHAR_DOUBLE: size += 8; break; case DC_SIGCHAR_LONGLONG: case DC_SIGCHAR_ULONGLONG: regs = 2; size += 8; break; default: if (regs < 2) regs++; else size += 4; break; } } return size; } void dcbInitCallback(DCCallback* pcb, const char* signature, DCCallbackHandler* handler, void* userdata) { const char* ptr; char ch; int mode; pcb->handler = handler; pcb->userdata = userdata; ptr = signature; ch = *ptr; /* x86 hints: */ mode = DC_CALL_C_X86_CDECL; if(ch == DC_SIGCHAR_CC_PREFIX) { ptr++; ch = *ptr++; switch(ch) { case DC_SIGCHAR_CC_STDCALL: mode = DC_CALL_C_X86_WIN32_STD; break; case DC_SIGCHAR_CC_THISCALL_MS: mode = DC_CALL_C_X86_WIN32_THIS_MS; break; case DC_SIGCHAR_CC_FASTCALL_GNU: mode = DC_CALL_C_X86_WIN32_FAST_GNU; break; case DC_SIGCHAR_CC_FASTCALL_MS: mode = DC_CALL_C_X86_WIN32_FAST_MS; break; } } /* x86 configuration: */ switch(mode) { case DC_CALL_C_X86_CDECL: pcb->args_vt = &dcArgsVT_default; pcb->stack_cleanup = dcbCleanupSize_x86_cdecl(ptr); break; case DC_CALL_C_X86_WIN32_STD: pcb->args_vt = &dcArgsVT_default; pcb->stack_cleanup = dcbCleanupSize_x86_std(ptr); break; case DC_CALL_C_X86_WIN32_THIS_MS: pcb->args_vt = &dcArgsVT_this_ms; pcb->stack_cleanup = dcbCleanupSize_x86_this_ms(ptr); break; case DC_CALL_C_X86_WIN32_FAST_MS: pcb->args_vt = &dcArgsVT_fast_ms; pcb->stack_cleanup = dcbCleanupSize_x86_fast_ms(ptr); break; case DC_CALL_C_X86_WIN32_FAST_GNU: pcb->args_vt = &dcArgsVT_fast_gnu; pcb->stack_cleanup = dcbCleanupSize_x86_fast_gnu(ptr); break; } #if defined(DC_PLAN9) /* HACK for Plan9 - 'reuse' pcb->stack_cleanup as a flag to indicate if return value is 64bit. The field is not used anyways as the caller is responsible to clean up the stack in Plan9. If set to '1' the callback kernel takes into account an extra stack-parameter (pointer to 64bit return value). I thought of introducing a new field, but for one single x86 calling convention out of many, it seemed overkill to change the struct for everybody else. Maybe renaming would be a good idea, though. ~ Tassilo */ while(*ptr) { if(*ptr++ == DC_SIGCHAR_ENDARG) { pcb->stack_cleanup = (*ptr == DC_SIGCHAR_LONGLONG) || (*ptr == DC_SIGCHAR_ULONGLONG); break; } } #endif } /* * callback constructor */ DCCallback* dcbNewCallback(const char* signature, DCCallbackHandler* handler, void* userdata) { int err; DCCallback* pcb; err = dcAllocWX(sizeof(DCCallback), (void**) &pcb); if (err != 0) return 0; dcbInitThunk(&pcb->thunk, dcCallbackThunkEntry); dcbInitCallback(pcb, signature, handler, userdata); return pcb; } /* * free */ void dcbFreeCallback(DCCallback* pcb) { dcFreeWX(pcb, sizeof(DCCallback)); } void* dcbGetUserData(DCCallback* pcb) { return pcb->userdata; }