mirror of
https://github.com/OpenRCT2/OpenRCT2
synced 2026-01-16 03:23:15 +01:00
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
/*****************************************************************************
|
|
* Copyright (c) 2014-2018 OpenRCT2 developers
|
|
*
|
|
* For a complete list of all authors, please refer to contributors.md
|
|
* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
|
|
*
|
|
* OpenRCT2 is licensed under the GNU General Public License version 3.
|
|
*****************************************************************************/
|
|
|
|
#include "Addresses.h"
|
|
|
|
#if defined(__GNUC__)
|
|
#ifdef __clang__
|
|
#define DISABLE_OPT __attribute__((noinline, optnone))
|
|
#else
|
|
#define DISABLE_OPT __attribute__((noinline, optimize("O0")))
|
|
#endif // __clang__
|
|
#else
|
|
#define DISABLE_OPT
|
|
#endif // defined(__GNUC__)
|
|
|
|
// This variable serves a purpose of identifying a crash if it has happened inside original code.
|
|
// When switching to original code, stack frame pointer is modified and prevents breakpad from providing stack trace.
|
|
volatile int32_t _originalAddress = 0;
|
|
|
|
int32_t DISABLE_OPT RCT2_CALLPROC_X(
|
|
int32_t address, int32_t _eax, int32_t _ebx, int32_t _ecx, int32_t _edx, int32_t _esi, int32_t _edi, int32_t _ebp)
|
|
{
|
|
int32_t result = 0;
|
|
_originalAddress = address;
|
|
#if defined(PLATFORM_X86) && !defined(NO_RCT2)
|
|
#ifdef _MSC_VER
|
|
__asm {
|
|
push ebp
|
|
push address
|
|
mov eax, _eax
|
|
mov ebx, _ebx
|
|
mov ecx, _ecx
|
|
mov edx, _edx
|
|
mov esi, _esi
|
|
mov edi, _edi
|
|
mov ebp, _ebp
|
|
call [esp]
|
|
lahf
|
|
pop ebp
|
|
pop ebp
|
|
/* Load result with flags */
|
|
mov result, eax
|
|
}
|
|
#else
|
|
__asm__ volatile("\
|
|
\n\
|
|
push %%ebx \n\
|
|
push %%ebp \n\
|
|
push %[address] \n\
|
|
mov %[eax], %%eax \n\
|
|
mov %[ebx], %%ebx \n\
|
|
mov %[ecx], %%ecx \n\
|
|
mov %[edx], %%edx \n\
|
|
mov %[esi], %%esi \n\
|
|
mov %[edi], %%edi \n\
|
|
mov %[ebp], %%ebp \n\
|
|
call *(%%esp) \n\
|
|
lahf \n\
|
|
add $4, %%esp \n\
|
|
pop %%ebp \n\
|
|
pop %%ebx \n\
|
|
/* Load result with flags */ \n\
|
|
mov %%eax, %[result] \n\
|
|
"
|
|
: [address] "+m"(address),
|
|
[eax] "+m"(_eax),
|
|
[ebx] "+m"(_ebx),
|
|
[ecx] "+m"(_ecx),
|
|
[edx] "+m"(_edx),
|
|
[esi] "+m"(_esi),
|
|
[edi] "+m"(_edi),
|
|
[ebp] "+m"(_ebp),
|
|
[result] "+m"(result)
|
|
:
|
|
: "eax", "ecx", "edx", "esi", "edi", "memory");
|
|
#endif
|
|
#endif // PLATFORM_X86
|
|
_originalAddress = 0;
|
|
// lahf only modifies ah, zero out the rest
|
|
return result & 0xFF00;
|
|
}
|