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-exception 6 // 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 #endif 17 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_RISCV32 22 #define LOAD(reg, val) LOAD_IMPL(lw, reg, val) 23 #define LOAD_FP(reg, val) LOAD_IMPL(flw, reg, val) 24 #else 25 #define LOAD(reg, val) LOAD_IMPL(ld, reg, val) 26 #define LOAD_FP(reg, val) LOAD_IMPL(fld, reg, val) 27 #endif 28 29 namespace LIBC_NAMESPACE_DECL { 30 31 LLVM_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_double 48 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 #endif 63 64 val = val == 0 ? 1 : val; 65 LIBC_INLINE_ASM("add a0, %0, zero\n\t" : : "r"(val) :); 66 } 67 68 } // namespace LIBC_NAMESPACE_DECL 69