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https://github.com/tobast/libunwind-eh_elf.git
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555bae8aa3
eh_valid_mask instead. When reading and the corresponding eh_valid_mask bit is set, read from eh_args[] instead. 2004/11/17 02:43:39-08:00 mostang.com!davidm (tdep_access_reg): Treat UNW_X86_64_RSP exactly like UNW_X86_64_CFA. (Logical change 1.290)
134 lines
3.8 KiB
C
134 lines
3.8 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "unwind_i.h"
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#if 0
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static inline dwarf_loc_t
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linux_scratch_loc (struct cursor *c, unw_regnum_t reg)
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{
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unw_word_t addr = c->sigcontext_addr;
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switch (c->sigcontext_format)
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{
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case X86_64_SCF_NONE:
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return DWARF_REG_LOC (&c->dwarf, reg);
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case X86_64_SCF_LINUX_RT_SIGFRAME:
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addr += LINUX_UC_MCONTEXT_OFF;
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break;
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}
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return DWARF_REG_LOC (&c->dwarf, reg);
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}
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HIDDEN dwarf_loc_t
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x86_64_scratch_loc (struct cursor *c, unw_regnum_t reg)
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{
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if (c->sigcontext_addr)
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return linux_scratch_loc (c, reg);
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else
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return DWARF_REG_LOC (&c->dwarf, reg);
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}
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#endif
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HIDDEN int
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tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
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int write)
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{
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dwarf_loc_t loc = DWARF_NULL_LOC;
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unsigned int mask;
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int arg_num;
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switch (reg)
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{
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case UNW_X86_64_RIP:
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if (write)
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c->dwarf.ip = *valp; /* also update the RIP cache */
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loc = c->dwarf.loc[RIP];
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break;
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case UNW_X86_64_CFA:
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case UNW_X86_64_RSP:
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if (write)
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return -UNW_EREADONLYREG;
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*valp = c->dwarf.cfa;
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return 0;
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case UNW_X86_64_RAX:
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case UNW_X86_64_RDX:
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arg_num = reg - UNW_X86_64_RAX;
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mask = (1 << arg_num);
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if (write)
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{
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c->dwarf.eh_args[arg_num] = *valp;
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c->dwarf.eh_valid_mask |= mask;
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return 0;
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}
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else if ((c->dwarf.eh_valid_mask & mask) != 0)
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{
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*valp = c->dwarf.eh_args[arg_num];
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return 0;
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}
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else
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loc = c->dwarf.loc[(reg == UNW_X86_64_RAX) ? RAX : RDX];
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break;
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case UNW_X86_64_RCX: loc = c->dwarf.loc[RCX]; break;
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case UNW_X86_64_RBX: loc = c->dwarf.loc[RBX]; break;
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case UNW_X86_64_RBP: loc = c->dwarf.loc[RBP]; break;
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case UNW_X86_64_RSI: loc = c->dwarf.loc[RSI]; break;
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case UNW_X86_64_RDI: loc = c->dwarf.loc[RDI]; break;
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case UNW_X86_64_R8: loc = c->dwarf.loc[R8]; break;
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case UNW_X86_64_R9: loc = c->dwarf.loc[R9]; break;
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case UNW_X86_64_R10: loc = c->dwarf.loc[R10]; break;
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case UNW_X86_64_R11: loc = c->dwarf.loc[R11]; break;
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case UNW_X86_64_R12: loc = c->dwarf.loc[R12]; break;
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case UNW_X86_64_R13: loc = c->dwarf.loc[R13]; break;
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case UNW_X86_64_R14: loc = c->dwarf.loc[R14]; break;
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case UNW_X86_64_R15: loc = c->dwarf.loc[R15]; break;
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default:
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Debug (1, "bad register number %u\n", reg);
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return -UNW_EBADREG;
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}
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if (write)
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return dwarf_put (&c->dwarf, loc, *valp);
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else
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return dwarf_get (&c->dwarf, loc, valp);
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}
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HIDDEN int
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tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
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int write)
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{
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return -UNW_EBADREG;
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}
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