mirror of https://github.com/PCSX2/pcsx2.git
93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2021 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "FastJmp.h"
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#ifndef _WIN32
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#if defined(__APPLE__)
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#define PREFIX "_"
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#else
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#define PREFIX ""
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#endif
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#if defined(_M_X86_64)
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asm(
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"\t.global " PREFIX "fastjmp_set\n"
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"\t.global " PREFIX "fastjmp_jmp\n"
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"\t.text\n"
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"\t" PREFIX "fastjmp_set:" R"(
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movq 0(%rsp), %rax
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movq %rsp, %rdx # fixup stack pointer, so it doesn't include the call to fastjmp_set
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addq $8, %rdx
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movq %rax, 0(%rdi) # actually rip
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movq %rbx, 8(%rdi)
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movq %rdx, 16(%rdi) # actually rsp
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movq %rbp, 24(%rdi)
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movq %r12, 32(%rdi)
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movq %r13, 40(%rdi)
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movq %r14, 48(%rdi)
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movq %r15, 56(%rdi)
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xorl %eax, %eax
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ret
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)"
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"\t" PREFIX "fastjmp_jmp:" R"(
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movl %esi, %eax
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movq 0(%rdi), %rdx # actually rip
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movq 8(%rdi), %rbx
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movq 16(%rdi), %rsp # actually rsp
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movq 24(%rdi), %rbp
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movq 32(%rdi), %r12
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movq 40(%rdi), %r13
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movq 48(%rdi), %r14
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movq 56(%rdi), %r15
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jmp *%rdx
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)");
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#elif defined(_M_X86_32)
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asm(
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"\t.global " PREFIX "fastjmp_set\n"
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"\t.global " PREFIX "fastjmp_jmp\n"
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"\t.text\n"
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"\t" PREFIX "fastjmp_set:" R"(
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movl 0(%esp), %eax
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movl %esp, %edx # fixup stack pointer, so it doesn't include the call to fastjmp_set
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addl $4, %edx
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movl %eax, 0(%ecx) # actually eip
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movl %ebx, 4(%ecx)
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movl %edx, 8(%ecx) # actually esp
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movl %ebp, 12(%ecx)
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movl %esi, 16(%ecx)
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movl %edi, 20(%ecx)
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xorl %eax, %eax
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ret
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)"
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"\t" PREFIX "fastjmp_jmp:" R"(
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movl %edx, %eax
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movl 0(%ecx), %edx # actually eip
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movl 4(%ecx), %ebx
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movl 8(%ecx), %esp # actually esp
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movl 12(%ecx), %ebp
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movl 16(%ecx), %esi
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movl 20(%ecx), %edi
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jmp *%edx
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)");
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#endif
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#endif // __WIN32
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