| /* libunwind - a platform-independent unwind library |
| Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com> |
| |
| This file is part of libunwind. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ |
| |
| #include "_UCD_lib.h" |
| |
| #include "_UCD_internal.h" |
| |
| int |
| _UCD_access_reg (unw_addr_space_t as, |
| unw_regnum_t regnum, unw_word_t *valp, |
| int write, void *arg) |
| { |
| struct UCD_info *ui = arg; |
| |
| if (write) |
| { |
| Debug(0, "write is not supported\n"); |
| return -UNW_EINVAL; |
| } |
| |
| #if defined(UNW_TARGET_AARCH64) |
| if (regnum < 0 || regnum >= UNW_AARCH64_FPCR) |
| goto badreg; |
| #elif defined(UNW_TARGET_ARM) |
| if (regnum < 0 || regnum >= 16) |
| goto badreg; |
| #elif defined(UNW_TARGET_SH) |
| if (regnum < 0 || regnum > UNW_SH_PR) |
| goto badreg; |
| #else |
| #if defined(UNW_TARGET_MIPS) |
| static const uint8_t remap_regs[] = |
| { |
| [UNW_MIPS_R0] = EF_REG0, |
| [UNW_MIPS_R1] = EF_REG1, |
| [UNW_MIPS_R2] = EF_REG2, |
| [UNW_MIPS_R3] = EF_REG3, |
| [UNW_MIPS_R4] = EF_REG4, |
| [UNW_MIPS_R5] = EF_REG5, |
| [UNW_MIPS_R6] = EF_REG6, |
| [UNW_MIPS_R7] = EF_REG7, |
| [UNW_MIPS_R8] = EF_REG8, |
| [UNW_MIPS_R9] = EF_REG9, |
| [UNW_MIPS_R10] = EF_REG10, |
| [UNW_MIPS_R11] = EF_REG11, |
| [UNW_MIPS_R12] = EF_REG12, |
| [UNW_MIPS_R13] = EF_REG13, |
| [UNW_MIPS_R14] = EF_REG14, |
| [UNW_MIPS_R15] = EF_REG15, |
| [UNW_MIPS_R16] = EF_REG16, |
| [UNW_MIPS_R17] = EF_REG17, |
| [UNW_MIPS_R18] = EF_REG18, |
| [UNW_MIPS_R19] = EF_REG19, |
| [UNW_MIPS_R20] = EF_REG20, |
| [UNW_MIPS_R21] = EF_REG21, |
| [UNW_MIPS_R22] = EF_REG22, |
| [UNW_MIPS_R23] = EF_REG23, |
| [UNW_MIPS_R24] = EF_REG24, |
| [UNW_MIPS_R25] = EF_REG25, |
| [UNW_MIPS_R28] = EF_REG28, |
| [UNW_MIPS_R29] = EF_REG29, |
| [UNW_MIPS_R30] = EF_REG30, |
| [UNW_MIPS_R31] = EF_REG31, |
| [UNW_MIPS_PC] = EF_CP0_EPC, |
| }; |
| #elif defined(UNW_TARGET_X86) |
| static const uint8_t remap_regs[] = |
| { |
| /* names from libunwind-x86.h */ |
| [UNW_X86_EAX] = offsetof(struct user_regs_struct, eax) / sizeof(long), |
| [UNW_X86_EDX] = offsetof(struct user_regs_struct, edx) / sizeof(long), |
| [UNW_X86_ECX] = offsetof(struct user_regs_struct, ecx) / sizeof(long), |
| [UNW_X86_EBX] = offsetof(struct user_regs_struct, ebx) / sizeof(long), |
| [UNW_X86_ESI] = offsetof(struct user_regs_struct, esi) / sizeof(long), |
| [UNW_X86_EDI] = offsetof(struct user_regs_struct, edi) / sizeof(long), |
| [UNW_X86_EBP] = offsetof(struct user_regs_struct, ebp) / sizeof(long), |
| [UNW_X86_ESP] = offsetof(struct user_regs_struct, esp) / sizeof(long), |
| [UNW_X86_EIP] = offsetof(struct user_regs_struct, eip) / sizeof(long), |
| [UNW_X86_EFLAGS] = offsetof(struct user_regs_struct, eflags) / sizeof(long), |
| [UNW_X86_TRAPNO] = offsetof(struct user_regs_struct, orig_eax) / sizeof(long), |
| }; |
| #elif defined(UNW_TARGET_X86_64) |
| static const int8_t remap_regs[] = |
| { |
| [UNW_X86_64_RAX] = offsetof(struct user_regs_struct, rax) / sizeof(long), |
| [UNW_X86_64_RDX] = offsetof(struct user_regs_struct, rdx) / sizeof(long), |
| [UNW_X86_64_RCX] = offsetof(struct user_regs_struct, rcx) / sizeof(long), |
| [UNW_X86_64_RBX] = offsetof(struct user_regs_struct, rbx) / sizeof(long), |
| [UNW_X86_64_RSI] = offsetof(struct user_regs_struct, rsi) / sizeof(long), |
| [UNW_X86_64_RDI] = offsetof(struct user_regs_struct, rdi) / sizeof(long), |
| [UNW_X86_64_RBP] = offsetof(struct user_regs_struct, rbp) / sizeof(long), |
| [UNW_X86_64_RSP] = offsetof(struct user_regs_struct, rsp) / sizeof(long), |
| [UNW_X86_64_RIP] = offsetof(struct user_regs_struct, rip) / sizeof(long), |
| }; |
| #else |
| #error Port me |
| #endif |
| |
| if (regnum < 0 || regnum >= (unw_regnum_t)ARRAY_SIZE(remap_regs)) |
| goto badreg; |
| |
| regnum = remap_regs[regnum]; |
| #endif |
| |
| /* pr_reg is a long[] array, but it contains struct user_regs_struct's |
| * image. |
| */ |
| Debug(1, "pr_reg[%d]:%ld (0x%lx)\n", regnum, |
| (long)ui->prstatus->pr_reg[regnum], |
| (long)ui->prstatus->pr_reg[regnum] |
| ); |
| *valp = ui->prstatus->pr_reg[regnum]; |
| |
| return 0; |
| |
| badreg: |
| Debug(0, "bad regnum:%d\n", regnum); |
| return -UNW_EINVAL; |
| } |