69 lines · cpp
1//===-- Implementation of longjmp -----------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/setjmp/longjmp.h"10#include "src/__support/common.h"11#include "src/__support/macros/config.h"12#include "src/__support/macros/properties/architectures.h"13 14#if !defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)15#error "Invalid file include"16#endif17 18#define LOAD_IMPL(insns, reg, val) \19 LIBC_INLINE_ASM(#insns " " #reg ", %0\n\t" : : "m"(val) :)20 21#ifdef LIBC_TARGET_ARCH_IS_RISCV3222#define LOAD(reg, val) LOAD_IMPL(lw, reg, val)23#define LOAD_FP(reg, val) LOAD_IMPL(flw, reg, val)24#else25#define LOAD(reg, val) LOAD_IMPL(ld, reg, val)26#define LOAD_FP(reg, val) LOAD_IMPL(fld, reg, val)27#endif28 29namespace LIBC_NAMESPACE_DECL {30 31LLVM_LIBC_FUNCTION(void, longjmp, (jmp_buf buf, int val)) {32 LOAD(ra, buf->__pc);33 LOAD(s0, buf->__regs[0]);34 LOAD(s1, buf->__regs[1]);35 LOAD(s2, buf->__regs[2]);36 LOAD(s3, buf->__regs[3]);37 LOAD(s4, buf->__regs[4]);38 LOAD(s5, buf->__regs[5]);39 LOAD(s6, buf->__regs[6]);40 LOAD(s7, buf->__regs[7]);41 LOAD(s8, buf->__regs[8]);42 LOAD(s9, buf->__regs[9]);43 LOAD(s10, buf->__regs[10]);44 LOAD(s11, buf->__regs[11]);45 LOAD(sp, buf->__sp);46 47#if __riscv_float_abi_double48 LOAD_FP(fs0, buf->__fpregs[0]);49 LOAD_FP(fs1, buf->__fpregs[1]);50 LOAD_FP(fs2, buf->__fpregs[2]);51 LOAD_FP(fs3, buf->__fpregs[3]);52 LOAD_FP(fs4, buf->__fpregs[4]);53 LOAD_FP(fs5, buf->__fpregs[5]);54 LOAD_FP(fs6, buf->__fpregs[6]);55 LOAD_FP(fs7, buf->__fpregs[7]);56 LOAD_FP(fs8, buf->__fpregs[8]);57 LOAD_FP(fs9, buf->__fpregs[9]);58 LOAD_FP(fs10, buf->__fpregs[10]);59 LOAD_FP(fs11, buf->__fpregs[11]);60#elif defined(__riscv_float_abi_single)61#error "longjmp implementation not available for the target architecture."62#endif63 64 val = val == 0 ? 1 : val;65 LIBC_INLINE_ASM("add a0, %0, zero\n\t" : : "r"(val) :);66}67 68} // namespace LIBC_NAMESPACE_DECL69