292 lines
10 KiB
C
292 lines
10 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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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 X86_LIBUNWIND_I_H
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#define X86_LIBUNWIND_I_H
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/* Target-dependent definitions that are internal to libunwind but need
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to be shared with target-independent code. */
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#include <stdlib.h>
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#include <libunwind.h>
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#include "elf32.h"
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#include "mempool.h"
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#include "dwarf.h"
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typedef struct
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{
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/* no x86-specific fast trace */
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}
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unw_tdep_frame_t;
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struct unw_addr_space
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{
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struct unw_accessors acc;
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unw_caching_policy_t caching_policy;
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#ifdef HAVE_ATOMIC_OPS_H
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AO_t cache_generation;
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#else
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uint32_t cache_generation;
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#endif
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unw_word_t dyn_generation; /* see dyn-common.h */
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unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */
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struct dwarf_rs_cache global_cache;
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struct unw_debug_frame_list *debug_frames;
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};
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struct cursor
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{
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struct dwarf_cursor dwarf; /* must be first */
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/* Format of sigcontext structure and address at which it is
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stored: */
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enum
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{
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X86_SCF_NONE, /* no signal frame encountered */
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X86_SCF_LINUX_SIGFRAME, /* Linux x86 sigcontext */
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X86_SCF_LINUX_RT_SIGFRAME, /* POSIX ucontext_t */
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X86_SCF_FREEBSD_SIGFRAME, /* FreeBSD x86 sigcontext */
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X86_SCF_FREEBSD_SIGFRAME4, /* FreeBSD 4.x x86 sigcontext */
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X86_SCF_FREEBSD_OSIGFRAME, /* FreeBSD pre-4.x x86 sigcontext */
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X86_SCF_FREEBSD_SYSCALL, /* FreeBSD x86 syscall */
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}
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sigcontext_format;
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unw_word_t sigcontext_addr;
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int validate;
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ucontext_t *uc;
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};
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static inline ucontext_t *
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dwarf_get_uc(const struct dwarf_cursor *cursor)
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{
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const struct cursor *c = (struct cursor *) cursor->as_arg;
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return c->uc;
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}
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#define DWARF_GET_LOC(l) ((l).val)
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#ifdef UNW_LOCAL_ONLY
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# define DWARF_NULL_LOC DWARF_LOC (0, 0)
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# define DWARF_IS_NULL_LOC(l) (DWARF_GET_LOC (l) == 0)
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# define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r) })
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# define DWARF_IS_REG_LOC(l) 0
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# define DWARF_REG_LOC(c,r) (DWARF_LOC((unw_word_t) \
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tdep_uc_addr(dwarf_get_uc(c), (r)), 0))
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# define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0)
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# define DWARF_FPREG_LOC(c,r) (DWARF_LOC((unw_word_t) \
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tdep_uc_addr(dwarf_get_uc(c), (r)), 0))
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static inline int
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dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
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{
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if (!DWARF_GET_LOC (loc))
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return -1;
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*val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
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return 0;
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}
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static inline int
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dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
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{
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if (!DWARF_GET_LOC (loc))
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return -1;
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*(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
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return 0;
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}
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static inline int
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dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
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{
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if (!DWARF_GET_LOC (loc))
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return -1;
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return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
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0, c->as_arg);
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}
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static inline int
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dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
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{
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if (!DWARF_GET_LOC (loc))
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return -1;
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return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
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1, c->as_arg);
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}
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#else /* !UNW_LOCAL_ONLY */
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# define DWARF_LOC_TYPE_FP (1 << 0)
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# define DWARF_LOC_TYPE_REG (1 << 1)
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# define DWARF_NULL_LOC DWARF_LOC (0, 0)
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# define DWARF_IS_NULL_LOC(l) \
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({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
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# define DWARF_LOC(r, t) ((dwarf_loc_t) { .val = (r), .type = (t) })
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# define DWARF_IS_REG_LOC(l) (((l).type & DWARF_LOC_TYPE_REG) != 0)
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# define DWARF_IS_FP_LOC(l) (((l).type & DWARF_LOC_TYPE_FP) != 0)
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# define DWARF_REG_LOC(c,r) DWARF_LOC((r), DWARF_LOC_TYPE_REG)
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# define DWARF_MEM_LOC(c,m) DWARF_LOC ((m), 0)
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# define DWARF_FPREG_LOC(c,r) DWARF_LOC((r), (DWARF_LOC_TYPE_REG \
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| DWARF_LOC_TYPE_FP))
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static inline int
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dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
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{
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char *valp = (char *) &val;
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unw_word_t addr;
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int ret;
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if (DWARF_IS_NULL_LOC (loc))
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return -UNW_EBADREG;
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if (DWARF_IS_REG_LOC (loc))
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return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
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val, 0, c->as_arg);
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addr = DWARF_GET_LOC (loc);
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if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
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0, c->as_arg)) < 0)
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return ret;
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return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
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c->as_arg);
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}
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static inline int
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dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
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{
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char *valp = (char *) &val;
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unw_word_t addr;
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int ret;
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if (DWARF_IS_NULL_LOC (loc))
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return -UNW_EBADREG;
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if (DWARF_IS_REG_LOC (loc))
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return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
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&val, 1, c->as_arg);
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addr = DWARF_GET_LOC (loc);
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if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
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1, c->as_arg)) < 0)
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return ret;
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return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
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1, c->as_arg);
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}
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static inline int
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dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
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{
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if (DWARF_IS_NULL_LOC (loc))
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return -UNW_EBADREG;
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/* If a code-generator were to save a value of type unw_word_t in a
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floating-point register, we would have to support this case. I
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suppose it could happen with MMX registers, but does it really
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happen? */
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assert (!DWARF_IS_FP_LOC (loc));
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if (DWARF_IS_REG_LOC (loc))
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return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
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0, c->as_arg);
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else
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return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
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0, c->as_arg);
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}
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static inline int
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dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
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{
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if (DWARF_IS_NULL_LOC (loc))
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return -UNW_EBADREG;
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/* If a code-generator were to save a value of type unw_word_t in a
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floating-point register, we would have to support this case. I
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suppose it could happen with MMX registers, but does it really
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happen? */
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assert (!DWARF_IS_FP_LOC (loc));
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if (DWARF_IS_REG_LOC (loc))
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return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
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1, c->as_arg);
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else
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return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
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1, c->as_arg);
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}
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#endif /* !UNW_LOCAL_ONLY */
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#define tdep_getcontext_trace unw_getcontext
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#define tdep_init_done UNW_OBJ(init_done)
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#define tdep_init UNW_OBJ(init)
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/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
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tdep_search_unwind_table. */
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#define tdep_search_unwind_table dwarf_search_unwind_table
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#define tdep_find_unwind_table dwarf_find_unwind_table
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#define tdep_uc_addr UNW_ARCH_OBJ(uc_addr)
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#define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image)
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#define tdep_access_reg UNW_OBJ(access_reg)
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#define tdep_access_fpreg UNW_OBJ(access_fpreg)
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#define tdep_fetch_frame(c,ip,n) do {} while(0)
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#define tdep_cache_frame(c,rs) do {} while(0)
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#define tdep_reuse_frame(c,rs) do {} while(0)
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#define tdep_stash_frame(c,rs) do {} while(0)
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#define tdep_trace(cur,addr,n) (-UNW_ENOINFO)
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#ifdef UNW_LOCAL_ONLY
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# define tdep_find_proc_info(c,ip,n) \
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dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n), \
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(c)->as_arg)
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# define tdep_put_unwind_info(as,pi,arg) \
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dwarf_put_unwind_info((as), (pi), (arg))
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#else
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# define tdep_find_proc_info(c,ip,n) \
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(*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n), \
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(c)->as_arg)
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# define tdep_put_unwind_info(as,pi,arg) \
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(*(as)->acc.put_unwind_info)((as), (pi), (arg))
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#endif
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#define tdep_get_as(c) ((c)->dwarf.as)
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#define tdep_get_as_arg(c) ((c)->dwarf.as_arg)
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#define tdep_get_ip(c) ((c)->dwarf.ip)
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#define tdep_big_endian(as) 0
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extern int tdep_init_done;
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extern void tdep_init (void);
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extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
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unw_dyn_info_t *di, unw_proc_info_t *pi,
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int need_unwind_info, void *arg);
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extern void *tdep_uc_addr (ucontext_t *uc, int reg);
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extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
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unsigned long *segbase, unsigned long *mapoff,
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char *path, size_t pathlen);
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extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
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unw_word_t *valp, int write);
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extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
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unw_fpreg_t *valp, int write);
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#endif /* X86_LIBUNWIND_I_H */
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