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| 1 | //===-- Definition of type jmp_buf ----------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLVM_LIBC_TYPES_JMP_BUF_H |
| 10 | #define LLVM_LIBC_TYPES_JMP_BUF_H |
| 11 | |
| 12 | // TODO: implement sigjmp_buf related functions for other architectures |
| 13 | // Issue: https://github.com/llvm/llvm-project/issues/136358 |
| 14 | #if defined(__linux__) |
| 15 | #if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \ |
| 16 | defined(__riscv) |
| 17 | #define __LIBC_HAS_SIGJMP_BUF |
| 18 | #endif |
| 19 | #endif |
| 20 | |
| 21 | #if defined(__LIBC_HAS_SIGJMP_BUF) |
| 22 | #include "sigset_t.h" |
| 23 | #endif |
| 24 | |
| 25 | typedef struct { |
| 26 | #ifdef __x86_64__ |
| 27 | __UINT64_TYPE__ rbx; |
| 28 | __UINT64_TYPE__ rbp; |
| 29 | __UINT64_TYPE__ r12; |
| 30 | __UINT64_TYPE__ r13; |
| 31 | __UINT64_TYPE__ r14; |
| 32 | __UINT64_TYPE__ r15; |
| 33 | __UINTPTR_TYPE__ rsp; |
| 34 | __UINTPTR_TYPE__ rip; |
| 35 | #elif defined(__i386__) |
| 36 | long ebx; |
| 37 | long esi; |
| 38 | long edi; |
| 39 | long ebp; |
| 40 | long esp; |
| 41 | long eip; |
| 42 | #elif defined(__riscv) |
| 43 | /* Program counter. */ |
| 44 | long int __pc; |
| 45 | /* Callee-saved registers. */ |
| 46 | long int __regs[12]; |
| 47 | /* Stack pointer. */ |
| 48 | long int __sp; |
| 49 | /* Callee-saved floating point registers. */ |
| 50 | #if __riscv_float_abi_double |
| 51 | double __fpregs[12]; |
| 52 | #elif defined(__riscv_float_abi_single) |
| 53 | #error "__jmp_buf not available for your target architecture." |
| 54 | #endif |
| 55 | #elif defined(__arm__) |
| 56 | // r4, r5, r6, r7, r8, r9, r10, r11, r12, lr |
| 57 | long opaque[10]; |
| 58 | #elif defined(__aarch64__) |
| 59 | long opaque[14]; // x19-x29, lr, sp, optional x18 |
| 60 | #if __ARM_FP |
| 61 | long fopaque[8]; // d8-d15 |
| 62 | #endif |
| 63 | #else |
| 64 | #error "__jmp_buf not available for your target architecture." |
| 65 | #endif |
| 66 | #if defined(__LIBC_HAS_SIGJMP_BUF) |
| 67 | // return address |
| 68 | void *sig_retaddr; |
| 69 | // extra register buffer to avoid indefinite stack growth in sigsetjmp |
| 70 | void *sig_extra; |
| 71 | // signal masks |
| 72 | sigset_t sigmask; |
| 73 | #endif |
| 74 | } __jmp_buf; |
| 75 | |
| 76 | typedef __jmp_buf jmp_buf[1]; |
| 77 | |
| 78 | #if defined(__LIBC_HAS_SIGJMP_BUF) |
| 79 | typedef __jmp_buf sigjmp_buf[1]; |
| 80 | #endif |
| 81 | |
| 82 | #undef __LIBC_HAS_SIGJMP_BUF |
| 83 | |
| 84 | #endif // LLVM_LIBC_TYPES_JMP_BUF_H |
| 85 |
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