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- /* libunwind - a platform-independent unwind library
- Copyright (C) 2002 Hewlett-Packard Co
- Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
- Modified for x86_64 by Max Asbock <masbock@us.ibm.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 "unwind_i.h"
- /* Avoid a trip to x86_64_r_uc_addr() for purely local initialisation. */
- #if defined UNW_LOCAL_ONLY && defined __linux
- # define REG_INIT_LOC(c, rlc, ruc) \
- DWARF_LOC ((unw_word_t) &c->uc->uc_mcontext.gregs[REG_ ## ruc], 0)
- #elif defined UNW_LOCAL_ONLY && defined __FreeBSD__
- # define REG_INIT_LOC(c, rlc, ruc) \
- DWARF_LOC ((unw_word_t) &c->uc->uc_mcontext.mc_ ## rlc, 0)
- #else
- # define REG_INIT_LOC(c, rlc, ruc) \
- DWARF_REG_LOC (&c->dwarf, UNW_X86_64_ ## ruc)
- #endif
- static inline int
- common_init (struct cursor *c, unsigned use_prev_instr)
- {
- int ret;
- c->dwarf.loc[RAX] = REG_INIT_LOC(c, rax, RAX);
- c->dwarf.loc[RDX] = REG_INIT_LOC(c, rdx, RDX);
- c->dwarf.loc[RCX] = REG_INIT_LOC(c, rcx, RCX);
- c->dwarf.loc[RBX] = REG_INIT_LOC(c, rbx, RBX);
- c->dwarf.loc[RSI] = REG_INIT_LOC(c, rsi, RSI);
- c->dwarf.loc[RDI] = REG_INIT_LOC(c, rdi, RDI);
- c->dwarf.loc[RBP] = REG_INIT_LOC(c, rbp, RBP);
- c->dwarf.loc[RSP] = REG_INIT_LOC(c, rsp, RSP);
- c->dwarf.loc[R8] = REG_INIT_LOC(c, r8, R8);
- c->dwarf.loc[R9] = REG_INIT_LOC(c, r9, R9);
- c->dwarf.loc[R10] = REG_INIT_LOC(c, r10, R10);
- c->dwarf.loc[R11] = REG_INIT_LOC(c, r11, R11);
- c->dwarf.loc[R12] = REG_INIT_LOC(c, r12, R12);
- c->dwarf.loc[R13] = REG_INIT_LOC(c, r13, R13);
- c->dwarf.loc[R14] = REG_INIT_LOC(c, r14, R14);
- c->dwarf.loc[R15] = REG_INIT_LOC(c, r15, R15);
- c->dwarf.loc[RIP] = REG_INIT_LOC(c, rip, RIP);
- ret = dwarf_get (&c->dwarf, c->dwarf.loc[RIP], &c->dwarf.ip);
- if (ret < 0)
- return ret;
- ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_X86_64_RSP),
- &c->dwarf.cfa);
- if (ret < 0)
- return ret;
- c->sigcontext_format = X86_64_SCF_NONE;
- c->sigcontext_addr = 0;
- c->dwarf.args_size = 0;
- c->dwarf.ret_addr_column = RIP;
- c->dwarf.stash_frames = 0;
- c->dwarf.use_prev_instr = use_prev_instr;
- c->dwarf.pi_valid = 0;
- c->dwarf.pi_is_dynamic = 0;
- c->dwarf.hint = 0;
- c->dwarf.prev_rs = 0;
- return 0;
- }
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