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//===-- Implementation of longjmp -----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/setjmp/longjmp.h"
#include "include/llvm-libc-macros/offsetof-macro.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#if !defined(LIBC_TARGET_ARCH_IS_X86)
#error "Invalid file include"
#endif
namespace LIBC_NAMESPACE_DECL {
#ifdef __i386__
[[gnu::naked]]
LLVM_LIBC_FUNCTION(void, longjmp, (jmp_buf, int)) {
asm(R"(
mov 0x4(%%esp), %%ecx
mov 0x8(%%esp), %%eax
cmpl $0x1, %%eax
adcl $0x0, %%eax
mov %c[ebx](%%ecx), %%ebx
mov %c[esi](%%ecx), %%esi
mov %c[edi](%%ecx), %%edi
mov %c[ebp](%%ecx), %%ebp
mov %c[esp](%%ecx), %%esp
jmp *%c[eip](%%ecx)
)" ::[ebx] "i"(offsetof(__jmp_buf, ebx)),
[esi] "i"(offsetof(__jmp_buf, esi)), [edi] "i"(offsetof(__jmp_buf, edi)),
[ebp] "i"(offsetof(__jmp_buf, ebp)), [esp] "i"(offsetof(__jmp_buf, esp)),
[eip] "i"(offsetof(__jmp_buf, eip)));
}
#else
[[gnu::naked]]
LLVM_LIBC_FUNCTION(void, longjmp, (jmp_buf, int)) {
asm(R"(
cmpl $0x1, %%esi
adcl $0x0, %%esi
movq %%rsi, %%rax
movq %c[rbx](%%rdi), %%rbx
movq %c[rbp](%%rdi), %%rbp
movq %c[r12](%%rdi), %%r12
movq %c[r13](%%rdi), %%r13
movq %c[r14](%%rdi), %%r14
movq %c[r15](%%rdi), %%r15
movq %c[rsp](%%rdi), %%rsp
jmpq *%c[rip](%%rdi)
)" ::[rbx] "i"(offsetof(__jmp_buf, rbx)),
[rbp] "i"(offsetof(__jmp_buf, rbp)), [r12] "i"(offsetof(__jmp_buf, r12)),
[r13] "i"(offsetof(__jmp_buf, r13)), [r14] "i"(offsetof(__jmp_buf, r14)),
[r15] "i"(offsetof(__jmp_buf, r15)), [rsp] "i"(offsetof(__jmp_buf, rsp)),
[rip] "i"(offsetof(__jmp_buf, rip)));
}
#endif
} // namespace LIBC_NAMESPACE_DECL
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