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      1 /* libunwind - a platform-independent unwind library
      2 
      3 This file is part of libunwind.
      4 
      5 Permission is hereby granted, free of charge, to any person obtaining
      6 a copy of this software and associated documentation files (the
      7 "Software"), to deal in the Software without restriction, including
      8 without limitation the rights to use, copy, modify, merge, publish,
      9 distribute, sublicense, and/or sell copies of the Software, and to
     10 permit persons to whom the Software is furnished to do so, subject to
     11 the following conditions:
     12 
     13 The above copyright notice and this permission notice shall be
     14 included in all copies or substantial portions of the Software.
     15 
     16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     17 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     18 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     19 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     20 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     21 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     22 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
     23 
     24 #ifndef _UCD_internal_h
     25 #define _UCD_internal_h
     26 
     27 #ifdef HAVE_CONFIG_H
     28 #include <config.h>
     29 #endif
     30 
     31 #ifdef HAVE_SYS_TYPES_H
     32 #include <sys/types.h>
     33 #endif
     34 #ifdef HAVE_SYS_PROCFS_H
     35 #include <sys/procfs.h> /* struct elf_prstatus */
     36 #endif
     37 #include <errno.h>
     38 #include <string.h>
     39 #include <limits.h>
     40 #include <stdio.h>
     41 #include <stdlib.h>
     42 
     43 #include <libunwind-coredump.h>
     44 
     45 #include "libunwind_i.h"
     46 
     47 
     48 #if SIZEOF_OFF_T == 4
     49 typedef uint32_t uoff_t;
     50 #elif SIZEOF_OFF_T == 8
     51 typedef uint64_t uoff_t;
     52 #else
     53 # error Unknown size of off_t!
     54 #endif
     55 
     56 
     57 /* Similar to ELF phdrs. p_paddr element is absent,
     58  * since it's always 0 in coredumps.
     59  */
     60 struct coredump_phdr
     61   {
     62     uint32_t p_type;
     63     uint32_t p_flags;
     64     uoff_t   p_offset;
     65     uoff_t   p_vaddr;
     66     uoff_t   p_filesz;
     67     uoff_t   p_memsz;
     68     uoff_t   p_align;
     69     /* Data for backing file. If backing_fd < 0, there is no file */
     70     uoff_t   backing_filesize;
     71     char    *backing_filename; /* for error meesages only */
     72     int      backing_fd;
     73   };
     74 
     75 typedef struct coredump_phdr coredump_phdr_t;
     76 
     77 #if defined(HAVE_STRUCT_ELF_PRSTATUS)
     78 #define PRSTATUS_STRUCT elf_prstatus
     79 #elif defined(HAVE_STRUCT_PRSTATUS)
     80 #define PRSTATUS_STRUCT prstatus
     81 #else
     82 #define PRSTATUS_STRUCT non_existent
     83 #endif
     84 
     85 struct UCD_info
     86   {
     87     int big_endian;  /* bool */
     88     int coredump_fd;
     89     char *coredump_filename; /* for error meesages only */
     90     coredump_phdr_t *phdrs; /* array, allocated */
     91     unsigned phdrs_count;
     92     void *note_phdr; /* allocated or NULL */
     93     struct PRSTATUS_STRUCT *prstatus; /* points inside note_phdr */
     94     int n_threads;
     95     struct PRSTATUS_STRUCT **threads;
     96 
     97     struct elf_dyn_info edi;
     98   };
     99 
    100 extern coredump_phdr_t * _UCD_get_elf_image(struct UCD_info *ui, unw_word_t ip);
    101 
    102 #define STRUCT_MEMBER_P(struct_p, struct_offset) ((void *) ((char*) (struct_p) + (long) (struct_offset)))
    103 #define STRUCT_MEMBER(member_type, struct_p, struct_offset) (*(member_type*) STRUCT_MEMBER_P ((struct_p), (struct_offset)))
    104 
    105 #endif
    106