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/*
Package: dyncall
Library: test
File: test/gen-masm/call_x86.S
Description:
License:
Copyright (c) 2011 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.
*/
#if defined(GEN_MASM)
.386
.MODEL FLAT
.CODE
# define BEGIN_ASM
# define END_ASM END
# define GLOBAL(X) _##X PROC
# define BEGIN_PROC(X) OPTION PROLOGUE:NONE, EPILOGUE:NONE
# define END_PROC(X) _##X ENDP
# define HEX(X) X##h
#else
.intel_syntax
.text
# define BEGIN_ASM
# define END_ASM
# include "dyncall_macros.h"
# if defined(DC__OS_Win32) || defined(DC__OS_Cygwin) || defined(DC__OS_MinGW) || defined(DC__OS_Darwin)
# define CSYM(X) _##X
# else
# define CSYM(X) X
# endif
# define GLOBAL(X) .globl CSYM(X)
# define BEGIN_PROC(X) CSYM(X):
# define END_PROC(X)
# define HEX(X) 0x##X
#endif
// Package: dyncall
// File: dyncall/dyncall_call_x86_gas.S
// Description: All x86 abi call kernel implementations in GNU Assembler using C Preprocessor
// License:
//
// Copyright (c) 2007-2010 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.
//
// === end of macros ==========================================================
// ============================================================================
// DynCall Call Kernels for X86 Architecture
// ----------------------------------------------------------------------------
// C Interface:
// dcCall_x86_XXX(void* target, void* args, size_t size);
//
// Parameter Stack layout:
// size := ebp + 16
// args := ebp + 12
// target := ebp + 8
//
// NOTES:
// - epilog restore esp serves callee cleanup
// --- default / cdecl --------------------------------------------------------
// - caller clean-up
BEGIN_ASM
GLOBAL(dcCall_x86_cdecl)
BEGIN_PROC(dcCall_x86_cdecl)
push ebp // prolog
mov ebp, esp
push esi // save preserved
push edi
mov esi, dword ptr[ebp+12] // esi = copy source args
mov ecx, dword ptr[ebp+16] // ecx = size
sub esp, ecx // alloc stack size
mov edi, esp // edi = copy target stack
shr ecx, 2 // ecx = count DWORDs
rep movsd // copy DWORDs
call dword ptr[ebp+8] // call target
add esp, dword ptr[ebp+16] // cleanup stack
pop edi // restore preserved
pop esi
mov esp, ebp // epilog
pop ebp
ret
END_PROC(dcCall_x86_cdecl)
// ---- C++ this calls (microsoft) ------------------------------------------
// Details:
// - this pointer is in ECX
GLOBAL(dcCall_x86_win32_msthis)
BEGIN_PROC(dcCall_x86_win32_msthis)
push ebp // prolog
mov ebp, esp
push esi // save preserved
push edi
mov esi, dword ptr [ebp+12] // esi = pointer on args
mov ecx, dword ptr [ebp+16] // ecx = size
mov eax, dword ptr [esi+0] // eax = this pointer
add esi, 4 // increment args pointer by thisptr
sub ecx, 4 // decrement size by sizeof(thisptr)
sub esp, ecx // allocate argument-block on stack
mov edi, esp // edi = stack args
rep movsb // copy arguments
mov ecx, eax // ecx = this pointer
call dword ptr[ebp+8] // call function
pop edi // restore preserved
pop esi
mov esp, ebp // epilog
pop ebp
ret
END_PROC(dcCall_x86_win32_msthis)
// ---- win32 stdcall ---------------------------------------------------------
// - callee cleans up stack
GLOBAL(dcCall_x86_win32_std)
BEGIN_PROC(dcCall_x86_win32_std)
push ebp // prolog
mov ebp, esp
push esi // save esi, edi
push edi
mov esi, dword ptr[ebp+12] // esi = args
mov ecx, dword ptr[ebp+16] // ecx = size
sub esp, ecx // allocate size bytes on stack
mov edi, esp // edi = copy destination stack
rep movsb // copy BYTEs
call dword ptr[ebp+8] // call target
pop edi // restore edi, esi */
pop esi
mov esp, ebp // epilog
pop ebp
ret
END_PROC(dcCall_x86_win32_std)
// ---- win32 fastcall (GNU/Microsoft) ----------------------------------------
// - callee cleans up stack
// - first two integer (up to 32bits) are passed in ECX and EDX
GLOBAL(dcCall_x86_win32_fast)
BEGIN_PROC(dcCall_x86_win32_fast)
push ebp // prolog
mov ebp, esp
push esi // save preserved
push edi
mov esi, dword ptr[ebp+12] // esi = copy source args
mov ecx, dword ptr[ebp+16] // ecx = size
mov eax, dword ptr[esi+0] // eax = first argument
mov edx, dword ptr[esi+4] // edx = second argument
add esi, 8 // skip registers
sub ecx, 8 //
mov dword ptr [ebp+16], ecx // save stack alloc size
sub esp, ecx // allocate stack
mov edi, esp // edi = stack args
rep movsb // copy BYTEs
mov ecx, eax // ecx = first argument
call dword ptr[ebp+8] // call target
pop edi // restore preserved
pop esi
mov esp, ebp // epilog
pop ebp
ret
END_PROC(dcCall_x86_win32_fast)
// --- syscall int80 linux ---------------------------------------------------
// - all arguments are passed via registers
GLOBAL(dcCall_x86_sys_int80h_linux)
BEGIN_PROC(dcCall_x86_sys_int80h_linux)
push ebp // prolog
mov ebp, esp
push ebx // save preserved
push esi
push edi
mov eax, dword ptr[ebp+12] // eax = argument buffer
mov ebx, dword ptr[eax+0] // move first five arguments
mov ecx, dword ptr[eax+4]
mov edx, dword ptr[eax+8]
mov esi, dword ptr[eax+12]
mov edi, dword ptr[eax+16]
mov eax, dword ptr[ebp+8] // eax = syscall id
int HEX(80)
pop edi // restore preserved
pop esi
pop ebx
mov esp, ebp // epilog
pop ebp
ret
END_PROC(dcCall_x86_sys_int80h_linux)
// --- syscall int80 bsd -----------------------------------------------------
// - all arguments are passed via stack
GLOBAL(dcCall_x86_sys_int80h_bsd)
BEGIN_PROC(dcCall_x86_sys_int80h_bsd)
push ebp // prolog
mov ebp, esp
push esi // save preserved
push edi
mov esi, dword ptr[ebp+12] // esi = pointer on args
mov ecx, dword ptr[ebp+16] // ecx = size
sub esp, ecx // allocate stack space
mov edi, esp // edi = stack args
shr ecx, 2 // ecx = number of DWORDs
rep movsd // copy DWORDs
mov eax, dword ptr[ebp+8] // load system call id
call _do_int
pop edi // restore preserved
pop esi
mov esp, ebp // epilog
pop ebp
ret
_do_int:
int HEX(80)
ret
END_PROC(dcCall_x86_sys_int80h_bsd)
END_ASM
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