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ae5c1f2adf
Insert static branch prediction predicates in useful places and avoid unnecessary code in the hottest paths. Bypass unnecessary indirect calls, in particular to access_mem(), when known to be safe.
92 lines
3 KiB
C
92 lines
3 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2002, 2005 Hewlett-Packard Co
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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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#ifndef unwind_i_h
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#define unwind_i_h
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#include <memory.h>
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#include <stdint.h>
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#include <libunwind-x86_64.h>
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#include "libunwind_i.h"
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#include <sys/ucontext.h>
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/* DWARF column numbers for x86_64: */
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#define RAX 0
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#define RDX 1
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#define RCX 2
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#define RBX 3
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#define RSI 4
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#define RDI 5
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#define RBP 6
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#define RSP 7
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#define R8 8
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#define R9 9
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#define R10 10
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#define R11 11
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#define R12 12
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#define R13 13
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#define R14 14
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#define R15 15
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#define RIP 16
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#define x86_64_lock UNW_OBJ(lock)
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#define x86_64_local_resume UNW_OBJ(local_resume)
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#define x86_64_local_addr_space_init UNW_OBJ(local_addr_space_init)
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#define setcontext UNW_ARCH_OBJ (setcontext)
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#if 0
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#define x86_64_scratch_loc UNW_OBJ(scratch_loc)
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#endif
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#define x86_64_r_uc_addr UNW_OBJ(r_uc_addr)
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#define x86_64_sigreturn UNW_OBJ(sigreturn)
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/* By-pass calls to access_mem() when known to be safe. */
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#ifdef UNW_LOCAL_ONLY
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# undef ACCESS_MEM_FAST
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# define ACCESS_MEM_FAST(ret,validate,cur,addr,to) \
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do { \
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if (unlikely(validate)) \
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(ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); \
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else \
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(ret) = 0, (to) = *(unw_word_t *)(addr); \
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} while (0)
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#endif
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extern void x86_64_local_addr_space_init (void);
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extern int x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
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void *arg);
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extern int setcontext (const ucontext_t *ucp);
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#if 0
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extern dwarf_loc_t x86_64_scratch_loc (struct cursor *c, unw_regnum_t reg);
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#endif
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extern void *x86_64_r_uc_addr (ucontext_t *uc, int reg);
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extern NORETURN void x86_64_sigreturn (unw_cursor_t *cursor);
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#endif /* unwind_i_h */
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