| //===-- 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 "src/__support/common.h" |
| #include "src/__support/macros/properties/architectures.h" |
| |
| #include <setjmp.h> |
| |
| #if !defined(LIBC_TARGET_ARCH_IS_ANY_RISCV) |
| #error "Invalid file include" |
| #endif |
| |
| #define LOAD_IMPL(insns, reg, val) \ |
| LIBC_INLINE_ASM(#insns " " #reg ", %0\n\t" : : "m"(val) :) |
| |
| #ifdef LIBC_TARGET_ARCH_IS_RISCV32 |
| #define LOAD(reg, val) LOAD_IMPL(lw, reg, val) |
| #define LOAD_FP(reg, val) LOAD_IMPL(flw, reg, val) |
| #else |
| #define LOAD(reg, val) LOAD_IMPL(ld, reg, val) |
| #define LOAD_FP(reg, val) LOAD_IMPL(fld, reg, val) |
| #endif |
| |
| namespace LIBC_NAMESPACE { |
| |
| LLVM_LIBC_FUNCTION(void, longjmp, (__jmp_buf * buf, int val)) { |
| LOAD(ra, buf->__pc); |
| LOAD(s0, buf->__regs[0]); |
| LOAD(s1, buf->__regs[1]); |
| LOAD(s2, buf->__regs[2]); |
| LOAD(s3, buf->__regs[3]); |
| LOAD(s4, buf->__regs[4]); |
| LOAD(s5, buf->__regs[5]); |
| LOAD(s6, buf->__regs[6]); |
| LOAD(s7, buf->__regs[7]); |
| LOAD(s8, buf->__regs[8]); |
| LOAD(s9, buf->__regs[9]); |
| LOAD(s10, buf->__regs[10]); |
| LOAD(s11, buf->__regs[11]); |
| LOAD(sp, buf->__sp); |
| |
| #if __riscv_float_abi_double |
| LOAD_FP(fs0, buf->__fpregs[0]); |
| LOAD_FP(fs1, buf->__fpregs[1]); |
| LOAD_FP(fs2, buf->__fpregs[2]); |
| LOAD_FP(fs3, buf->__fpregs[3]); |
| LOAD_FP(fs4, buf->__fpregs[4]); |
| LOAD_FP(fs5, buf->__fpregs[5]); |
| LOAD_FP(fs6, buf->__fpregs[6]); |
| LOAD_FP(fs7, buf->__fpregs[7]); |
| LOAD_FP(fs8, buf->__fpregs[8]); |
| LOAD_FP(fs9, buf->__fpregs[9]); |
| LOAD_FP(fs10, buf->__fpregs[10]); |
| LOAD_FP(fs11, buf->__fpregs[11]); |
| #elif defined(__riscv_float_abi_single) |
| #error "longjmp implementation not available for the target architecture." |
| #endif |
| |
| val = val == 0 ? 1 : val; |
| LIBC_INLINE_ASM("add a0, %0, zero\n\t" : : "r"(val) :); |
| } |
| |
| } // namespace LIBC_NAMESPACE |