1e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* 2e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * dwarf-aux.c : libdw auxiliary interfaces 3e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 4e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * This program is free software; you can redistribute it and/or modify 5e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * it under the terms of the GNU General Public License as published by 6e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * the Free Software Foundation; either version 2 of the License, or 7e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * (at your option) any later version. 8e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 9e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * This program is distributed in the hope that it will be useful, 10e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * but WITHOUT ANY WARRANTY; without even the implied warranty of 11e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * GNU General Public License for more details. 13e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 14e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * You should have received a copy of the GNU General Public License 15e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * along with this program; if not, write to the Free Software 16e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 18e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 19e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 20e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <stdbool.h> 21e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "util.h" 22e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "debug.h" 23e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "dwarf-aux.h" 24e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 25e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 26e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * cu_find_realpath - Find the realpath of the target file 27e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @cu_die: A DIE(dwarf information entry) of CU(compilation Unit) 28e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @fname: The tail filename of the target file 29e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 30e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Find the real(long) path of @fname in @cu_die. 31e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 32e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengconst char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname) 33e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 34e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Files *files; 35e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng size_t nfiles, i; 36e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *src = NULL; 37e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int ret; 38e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 39e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!fname) 40e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 41e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 42e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = dwarf_getsrcfiles(cu_die, &files, &nfiles); 43e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret != 0) 44e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 45e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 46e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng for (i = 0; i < nfiles; i++) { 47e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng src = dwarf_filesrc(files, i, NULL, NULL); 48e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (strtailcmp(src, fname) == 0) 49e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng break; 50e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 51e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (i == nfiles) 52e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 53e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return src; 54e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 55e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 56e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 57e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * cu_get_comp_dir - Get the path of compilation directory 58e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @cu_die: a CU DIE 59e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 60e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get the path of compilation directory of given @cu_die. 61e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Since this depends on DW_AT_comp_dir, older gcc will not 62e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * embedded it. In that case, this returns NULL. 63e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 64e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengconst char *cu_get_comp_dir(Dwarf_Die *cu_die) 65e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 66e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 67e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_attr(cu_die, DW_AT_comp_dir, &attr) == NULL) 68e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 69e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return dwarf_formstring(&attr); 70e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 71e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 72e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 73e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * cu_find_lineinfo - Get a line number and file name for given address 74e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @cu_die: a CU DIE 75e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @addr: An address 76e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @fname: a pointer which returns the file name string 77e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @lineno: a pointer which returns the line number 78e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 79e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Find a line number and file name for @addr in @cu_die. 80e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 81e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint cu_find_lineinfo(Dwarf_Die *cu_die, unsigned long addr, 82e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char **fname, int *lineno) 83e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 84e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Line *line; 85e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr laddr; 86e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 87e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng line = dwarf_getsrc_die(cu_die, (Dwarf_Addr)addr); 88e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (line && dwarf_lineaddr(line, &laddr) == 0 && 89e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addr == (unsigned long)laddr && dwarf_lineno(line, lineno) == 0) { 90e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng *fname = dwarf_linesrc(line, NULL, NULL); 91e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!*fname) 92e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* line number is useless without filename */ 93e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng *lineno = 0; 94e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 95e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 96e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return *lineno ?: -ENOENT; 97e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 98e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 99e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_find_inline_cb(Dwarf_Die *die_mem, void *data); 100e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 101e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 102e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * cu_walk_functions_at - Walk on function DIEs at given address 103e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @cu_die: A CU DIE 104e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @addr: An address 105e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @callback: A callback which called with found DIEs 106e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @data: A user data 107e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 108e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Walk on function DIEs at given @addr in @cu_die. Passed DIEs 109e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * should be subprogram or inlined-subroutines. 110e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 111e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr, 112e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int (*callback)(Dwarf_Die *, void *), void *data) 113e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 114e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die die_mem; 115e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *sc_die; 116e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int ret = -ENOENT; 117e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 118e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Inlined function could be recursive. Trace it until fail */ 119e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng for (sc_die = die_find_realfunc(cu_die, addr, &die_mem); 120e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng sc_die != NULL; 121e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng sc_die = die_find_child(sc_die, __die_find_inline_cb, &addr, 122e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng &die_mem)) { 123e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = callback(sc_die, data); 124e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret) 125e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng break; 126e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 127e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 128e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return ret; 129e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 130e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 131e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 132e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 133e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_compare_name - Compare diename and tname 134e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @dw_die: a DIE 135e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @tname: a string of target name 136e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 137e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Compare the name of @dw_die and @tname. Return false if @dw_die has no name. 138e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 139e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengbool die_compare_name(Dwarf_Die *dw_die, const char *tname) 140e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 141e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *name; 142e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng name = dwarf_diename(dw_die); 143e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return name ? (strcmp(tname, name) == 0) : false; 144e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 145e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 146e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 147e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_call_lineno - Get callsite line number of inline-function instance 148e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @in_die: a DIE of an inlined function instance 149e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 150e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get call-site line number of @in_die. This means from where the inline 151e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * function is called. 152e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 153e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint die_get_call_lineno(Dwarf_Die *in_die) 154e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 155e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 156e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Word ret; 157e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 158e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!dwarf_attr(in_die, DW_AT_call_line, &attr)) 159e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 160e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 161e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_formudata(&attr, &ret); 162e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (int)ret; 163e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 164e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 165e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 166e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_type - Get type DIE 167e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @vr_die: a DIE of a variable 168e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: where to store a type DIE 169e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 170e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get a DIE of the type of given variable (@vr_die), and store 171e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * it to die_mem. Return NULL if fails to get a type DIE. 172e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 173e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem) 174e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 175e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 176e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 177e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_attr_integrate(vr_die, DW_AT_type, &attr) && 178e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_formref_die(&attr, die_mem)) 179e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_mem; 180e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else 181e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 182e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 183e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 184e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Get a type die, but skip qualifiers */ 185e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic Dwarf_Die *__die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem) 186e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 187e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int tag; 188e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 189e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng do { 190e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng vr_die = die_get_type(vr_die, die_mem); 191e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!vr_die) 192e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng break; 193e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag = dwarf_tag(vr_die); 194e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } while (tag == DW_TAG_const_type || 195e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag == DW_TAG_restrict_type || 196e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag == DW_TAG_volatile_type || 197e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag == DW_TAG_shared_type); 198e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 199e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return vr_die; 200e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 201e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 202e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 203e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_real_type - Get a type die, but skip qualifiers and typedef 204e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @vr_die: a DIE of a variable 205e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: where to store a type DIE 206e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 207e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get a DIE of the type of given variable (@vr_die), and store 208e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * it to die_mem. Return NULL if fails to get a type DIE. 209e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * If the type is qualifiers (e.g. const) or typedef, this skips it 210e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * and tries to find real type (structure or basic types, e.g. int). 211e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 212e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem) 213e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 214e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng do { 215e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng vr_die = __die_get_real_type(vr_die, die_mem); 216e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } while (vr_die && dwarf_tag(vr_die) == DW_TAG_typedef); 217e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 218e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return vr_die; 219e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 220e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 221e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Get attribute and translate it as a udata */ 222e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int die_get_attr_udata(Dwarf_Die *tp_die, unsigned int attr_name, 223e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Word *result) 224e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 225e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 226e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 227e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_attr(tp_die, attr_name, &attr) == NULL || 228e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_formudata(&attr, result) != 0) 229e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 230e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 231e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return 0; 232e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 233e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 234e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Get attribute and translate it as a sdata */ 235e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int die_get_attr_sdata(Dwarf_Die *tp_die, unsigned int attr_name, 236e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Sword *result) 237e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 238e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 239e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 240e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_attr(tp_die, attr_name, &attr) == NULL || 241e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_formsdata(&attr, result) != 0) 242e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 243e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 244e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return 0; 245e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 246e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 247e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 248e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_is_signed_type - Check whether a type DIE is signed or not 249e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @tp_die: a DIE of a type 250e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 251e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get the encoding of @tp_die and return true if the encoding 252e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * is signed. 253e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 254e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengbool die_is_signed_type(Dwarf_Die *tp_die) 255e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 256e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Word ret; 257e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 258e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (die_get_attr_udata(tp_die, DW_AT_encoding, &ret)) 259e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return false; 260e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 261e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (ret == DW_ATE_signed_char || ret == DW_ATE_signed || 262e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret == DW_ATE_signed_fixed); 263e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 264e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 265e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 266e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_is_func_def - Ensure that this DIE is a subprogram and definition 267e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @dw_die: a DIE 268e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 269e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Ensure that this DIE is a subprogram and NOT a declaration. This 270e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * returns true if @dw_die is a function definition. 271e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng **/ 272e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengbool die_is_func_def(Dwarf_Die *dw_die) 273e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 274e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 275e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 276e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (dwarf_tag(dw_die) == DW_TAG_subprogram && 277e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_attr(dw_die, DW_AT_declaration, &attr) == NULL); 278e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 279e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 280e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 281e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_data_member_location - Get the data-member offset 282e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @mb_die: a DIE of a member of a data structure 283e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @offs: The offset of the member in the data structure 284e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 285e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get the offset of @mb_die in the data structure including @mb_die, and 286e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * stores result offset to @offs. If any error occurs this returns errno. 287e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 288e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs) 289e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 290e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr; 291e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Op *expr; 292e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng size_t nexpr; 293e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int ret; 294e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 295e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_attr(mb_die, DW_AT_data_member_location, &attr) == NULL) 296e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 297e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 298e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_formudata(&attr, offs) != 0) { 299e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* DW_AT_data_member_location should be DW_OP_plus_uconst */ 300e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = dwarf_getlocation(&attr, &expr, &nexpr); 301e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret < 0 || nexpr == 0) 302e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 303e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 304e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (expr[0].atom != DW_OP_plus_uconst || nexpr != 1) { 305e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("Unable to get offset:Unexpected OP %x (%zd)\n", 306e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng expr[0].atom, nexpr); 307e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOTSUP; 308e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 309e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng *offs = (Dwarf_Word)expr[0].number; 310e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 311e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return 0; 312e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 313e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 314e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Get the call file index number in CU DIE */ 315e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int die_get_call_fileno(Dwarf_Die *in_die) 316e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 317e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Sword idx; 318e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 319e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (die_get_attr_sdata(in_die, DW_AT_call_file, &idx) == 0) 320e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (int)idx; 321e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else 322e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 323e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 324e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 325e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Get the declared file index number in CU DIE */ 326e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int die_get_decl_fileno(Dwarf_Die *pdie) 327e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 328e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Sword idx; 329e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 330e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (die_get_attr_sdata(pdie, DW_AT_decl_file, &idx) == 0) 331e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (int)idx; 332e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else 333e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 334e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 335e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 336e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 337e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_call_file - Get callsite file name of inlined function instance 338e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @in_die: a DIE of an inlined function instance 339e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 340e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get call-site file name of @in_die. This means from which file the inline 341e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * function is called. 342e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 343e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengconst char *die_get_call_file(Dwarf_Die *in_die) 344e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 345e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die cu_die; 346e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Files *files; 347e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int idx; 348e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 349e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng idx = die_get_call_fileno(in_die); 350e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (idx < 0 || !dwarf_diecu(in_die, &cu_die, NULL, NULL) || 351e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_getsrcfiles(&cu_die, &files, NULL) != 0) 352e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 353e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 354e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return dwarf_filesrc(files, idx, NULL, NULL); 355e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 356e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 357e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 358e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 359e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_find_child - Generic DIE search function in DIE tree 360e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @rt_die: a root DIE 361e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @callback: a callback function 362e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @data: a user data passed to the callback function 363e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: a buffer for result DIE 364e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 365e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Trace DIE tree from @rt_die and call @callback for each child DIE. 366e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * If @callback returns DIE_FIND_CB_END, this stores the DIE into 367e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem and returns it. If @callback returns DIE_FIND_CB_CONTINUE, 368e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * this continues to trace the tree. Optionally, @callback can return 369e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * DIE_FIND_CB_CHILD and DIE_FIND_CB_SIBLING, those means trace only 370e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * the children and trace only the siblings respectively. 371e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Returns NULL if @callback can't find any appropriate DIE. 372e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 373e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_find_child(Dwarf_Die *rt_die, 374e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int (*callback)(Dwarf_Die *, void *), 375e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng void *data, Dwarf_Die *die_mem) 376e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 377e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die child_die; 378e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int ret; 379e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 380e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = dwarf_child(rt_die, die_mem); 381e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret != 0) 382e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 383e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 384e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng do { 385e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = callback(die_mem, data); 386e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret == DIE_FIND_CB_END) 387e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_mem; 388e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 389e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if ((ret & DIE_FIND_CB_CHILD) && 390e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_find_child(die_mem, callback, data, &child_die)) { 391e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng memcpy(die_mem, &child_die, sizeof(Dwarf_Die)); 392e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_mem; 393e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 394e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } while ((ret & DIE_FIND_CB_SIBLING) && 395e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_siblingof(die_mem, die_mem) == 0); 396e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 397e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 398e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 399e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 400e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstruct __addr_die_search_param { 401e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr addr; 402e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *die_mem; 403e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng}; 404e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 405e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* die_find callback for non-inlined function search */ 406e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_search_func_cb(Dwarf_Die *fn_die, void *data) 407e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 408e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __addr_die_search_param *ad = data; 409e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 410e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* 411e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Since a declaration entry doesn't has given pc, this always returns 412e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * function definition entry. 413e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 414e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_tag(fn_die) == DW_TAG_subprogram && 415e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_haspc(fn_die, ad->addr)) { 416e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng memcpy(ad->die_mem, fn_die, sizeof(Dwarf_Die)); 417e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DWARF_CB_ABORT; 418e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 419e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DWARF_CB_OK; 420e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 421e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 422e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 423e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_find_realfunc - Search a non-inlined function at given address 424e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @cu_die: a CU DIE which including @addr 425e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @addr: target address 426e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: a buffer for result DIE 427e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 428e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Search a non-inlined function DIE which includes @addr. Stores the 429e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * DIE to @die_mem and returns it if found. Returns NULL if failed. 430e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 431e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr, 432e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *die_mem) 433e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 434e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __addr_die_search_param ad; 435e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ad.addr = addr; 436e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ad.die_mem = die_mem; 437e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* dwarf_getscopes can't find subprogram. */ 438e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!dwarf_getfuncs(cu_die, __die_search_func_cb, &ad, 0)) 439e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 440e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else 441e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_mem; 442e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 443e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 444e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* die_find callback for inline function search */ 445e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_find_inline_cb(Dwarf_Die *die_mem, void *data) 446e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 447e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr *addr = data; 448e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 449e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_tag(die_mem) == DW_TAG_inlined_subroutine && 450e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_haspc(die_mem, *addr)) 451e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_END; 452e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 453e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_CONTINUE; 454e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 455e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 456e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 457e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_find_top_inlinefunc - Search the top inlined function at given address 458e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @sp_die: a subprogram DIE which including @addr 459e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @addr: target address 460e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: a buffer for result DIE 461e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 462e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Search an inlined function DIE which includes @addr. Stores the 463e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * DIE to @die_mem and returns it if found. Returns NULL if failed. 464e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Even if several inlined functions are expanded recursively, this 465e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * doesn't trace it down, and returns the topmost one. 466e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 467e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, 468e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *die_mem) 469e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 470e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_find_child(sp_die, __die_find_inline_cb, &addr, die_mem); 471e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 472e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 473e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 474e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_find_inlinefunc - Search an inlined function at given address 475e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @sp_die: a subprogram DIE which including @addr 476e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @addr: target address 477e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: a buffer for result DIE 478e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 479e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Search an inlined function DIE which includes @addr. Stores the 480e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * DIE to @die_mem and returns it if found. Returns NULL if failed. 481e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * If several inlined functions are expanded recursively, this trace 482e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * it down and returns deepest one. 483e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 484e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, 485e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *die_mem) 486e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 487e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die tmp_die; 488e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 489e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng sp_die = die_find_child(sp_die, __die_find_inline_cb, &addr, &tmp_die); 490e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!sp_die) 491e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 492e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 493e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Inlined function could be recursive. Trace it until fail */ 494e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng while (sp_die) { 495e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng memcpy(die_mem, sp_die, sizeof(Dwarf_Die)); 496e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng sp_die = die_find_child(sp_die, __die_find_inline_cb, &addr, 497e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng &tmp_die); 498e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 499e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 500e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_mem; 501e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 502e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 503e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstruct __instance_walk_param { 504e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng void *addr; 505e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int (*callback)(Dwarf_Die *, void *); 506e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng void *data; 507e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int retval; 508e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng}; 509e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 510e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_walk_instances_cb(Dwarf_Die *inst, void *data) 511e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 512e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __instance_walk_param *iwp = data; 513e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute attr_mem; 514e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die origin_mem; 515e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Attribute *attr; 516e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *origin; 517e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int tmp; 518e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 519e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng attr = dwarf_attr(inst, DW_AT_abstract_origin, &attr_mem); 520e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (attr == NULL) 521e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_CONTINUE; 522e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 523e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng origin = dwarf_formref_die(attr, &origin_mem); 524e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (origin == NULL || origin->addr != iwp->addr) 525e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_CONTINUE; 526e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 527e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Ignore redundant instances */ 528e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_tag(inst) == DW_TAG_inlined_subroutine) { 529e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_decl_line(origin, &tmp); 530e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (die_get_call_lineno(inst) == tmp) { 531e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tmp = die_get_decl_fileno(origin); 532e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (die_get_call_fileno(inst) == tmp) 533e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_CONTINUE; 534e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 535e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 536e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 537e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng iwp->retval = iwp->callback(inst, iwp->data); 538e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 539e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (iwp->retval) ? DIE_FIND_CB_END : DIE_FIND_CB_CONTINUE; 540e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 541e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 542e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 543e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_walk_instances - Walk on instances of given DIE 544e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @or_die: an abstract original DIE 545e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @callback: a callback function which is called with instance DIE 546e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @data: user data 547e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 548e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Walk on the instances of give @in_die. @in_die must be an inlined function 549e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * declartion. This returns the return value of @callback if it returns 550e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * non-zero value, or -ENOENT if there is no instance. 551e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 552e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint die_walk_instances(Dwarf_Die *or_die, int (*callback)(Dwarf_Die *, void *), 553e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng void *data) 554e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 555e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die cu_die; 556e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die die_mem; 557e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __instance_walk_param iwp = { 558e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .addr = or_die->addr, 559e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .callback = callback, 560e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .data = data, 561e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .retval = -ENOENT, 562e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng }; 563e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 564e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_diecu(or_die, &cu_die, NULL, NULL) == NULL) 565e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 566e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 567e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_find_child(&cu_die, __die_walk_instances_cb, &iwp, &die_mem); 568e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 569e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return iwp.retval; 570e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 571e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 572e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Line walker internal parameters */ 573e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstruct __line_walk_param { 574e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bool recursive; 575e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng line_walk_callback_t callback; 576e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng void *data; 577e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int retval; 578e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng}; 579e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 580e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_walk_funclines_cb(Dwarf_Die *in_die, void *data) 581e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 582e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __line_walk_param *lw = data; 583e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr addr = 0; 584e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *fname; 585e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int lineno; 586e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 587e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_tag(in_die) == DW_TAG_inlined_subroutine) { 588e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng fname = die_get_call_file(in_die); 589e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng lineno = die_get_call_lineno(in_die); 590e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (fname && lineno > 0 && dwarf_entrypc(in_die, &addr) == 0) { 591e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng lw->retval = lw->callback(fname, lineno, addr, lw->data); 592e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (lw->retval != 0) 593e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_END; 594e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 595e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 596e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!lw->recursive) 597e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Don't need to search recursively */ 598e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_SIBLING; 599e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 600e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (addr) { 601e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng fname = dwarf_decl_file(in_die); 602e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (fname && dwarf_decl_line(in_die, &lineno) == 0) { 603e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng lw->retval = lw->callback(fname, lineno, addr, lw->data); 604e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (lw->retval != 0) 605e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_END; 606e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 607e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 608e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 609e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Continue to search nested inlined function call-sites */ 610e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_CONTINUE; 611e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 612e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 613e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* Walk on lines of blocks included in given DIE */ 614e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_walk_funclines(Dwarf_Die *sp_die, bool recursive, 615e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng line_walk_callback_t callback, void *data) 616e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 617e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __line_walk_param lw = { 618e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .recursive = recursive, 619e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .callback = callback, 620e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .data = data, 621e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .retval = 0, 622e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng }; 623e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die die_mem; 624e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr addr; 625e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *fname; 626e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int lineno; 627e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 628e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Handle function declaration line */ 629e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng fname = dwarf_decl_file(sp_die); 630e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (fname && dwarf_decl_line(sp_die, &lineno) == 0 && 631e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_entrypc(sp_die, &addr) == 0) { 632e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng lw.retval = callback(fname, lineno, addr, data); 633e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (lw.retval != 0) 634e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng goto done; 635e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 636e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_find_child(sp_die, __die_walk_funclines_cb, &lw, &die_mem); 637e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengdone: 638e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return lw.retval; 639e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 640e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 641e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_walk_culines_cb(Dwarf_Die *sp_die, void *data) 642e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 643e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __line_walk_param *lw = data; 644e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 645e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng lw->retval = __die_walk_funclines(sp_die, true, lw->callback, lw->data); 646e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (lw->retval != 0) 647e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DWARF_CB_ABORT; 648e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 649e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DWARF_CB_OK; 650e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 651e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 652e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 653e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_walk_lines - Walk on lines inside given DIE 654e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @rt_die: a root DIE (CU, subprogram or inlined_subroutine) 655e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @callback: callback routine 656e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @data: user data 657e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 658e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Walk on all lines inside given @rt_die and call @callback on each line. 659e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * If the @rt_die is a function, walk only on the lines inside the function, 660e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * otherwise @rt_die must be a CU DIE. 661e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Note that this walks not only dwarf line list, but also function entries 662e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * and inline call-site. 663e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 664e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data) 665e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 666e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Lines *lines; 667e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Line *line; 668e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr addr; 669e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *fname; 670e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int lineno, ret = 0; 671e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die die_mem, *cu_die; 672e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng size_t nlines, i; 673e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 674e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Get the CU die */ 675e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_tag(rt_die) != DW_TAG_compile_unit) 676e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng cu_die = dwarf_diecu(rt_die, &die_mem, NULL, NULL); 677e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else 678e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng cu_die = rt_die; 679e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!cu_die) { 680e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug2("Failed to get CU from given DIE.\n"); 681e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -EINVAL; 682e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 683e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 684e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Get lines list in the CU */ 685e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_getsrclines(cu_die, &lines, &nlines) != 0) { 686e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug2("Failed to get source lines on this CU.\n"); 687e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 688e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 689e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug2("Get %zd lines from this CU\n", nlines); 690e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 691e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Walk on the lines on lines list */ 692e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng for (i = 0; i < nlines; i++) { 693e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng line = dwarf_onesrcline(lines, i); 694e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (line == NULL || 695e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_lineno(line, &lineno) != 0 || 696e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_lineaddr(line, &addr) != 0) { 697e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug2("Failed to get line info. " 698e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng "Possible error in debuginfo.\n"); 699e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng continue; 700e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 701e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Filter lines based on address */ 702e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (rt_die != cu_die) 703e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* 704e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Address filtering 705e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * The line is included in given function, and 706e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * no inline block includes it. 707e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 708e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!dwarf_haspc(rt_die, addr) || 709e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_find_inlinefunc(rt_die, addr, &die_mem)) 710e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng continue; 711e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Get source line */ 712e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng fname = dwarf_linesrc(line, NULL, NULL); 713e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 714e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = callback(fname, lineno, addr, data); 715e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret != 0) 716e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return ret; 717e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 718e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 719e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* 720e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Dwarf lines doesn't include function declarations and inlined 721e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * subroutines. We have to check functions list or given function. 722e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 723e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (rt_die != cu_die) 724e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* 725e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Don't need walk functions recursively, because nested 726e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * inlined functions don't have lines of the specified DIE. 727e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 728e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = __die_walk_funclines(rt_die, false, callback, data); 729e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else { 730e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __line_walk_param param = { 731e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .callback = callback, 732e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .data = data, 733e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .retval = 0, 734e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng }; 735e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_getfuncs(cu_die, __die_walk_culines_cb, ¶m, 0); 736e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = param.retval; 737e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 738e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 739e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return ret; 740e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 741e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 742e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstruct __find_variable_param { 743e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *name; 744e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr addr; 745e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng}; 746e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 747e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_find_variable_cb(Dwarf_Die *die_mem, void *data) 748e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 749e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __find_variable_param *fvp = data; 750e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int tag; 751e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 752e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag = dwarf_tag(die_mem); 753e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if ((tag == DW_TAG_formal_parameter || 754e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag == DW_TAG_variable) && 755e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_compare_name(die_mem, fvp->name)) 756e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_END; 757e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 758e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (dwarf_haspc(die_mem, fvp->addr)) 759e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_CONTINUE; 760e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else 761e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_SIBLING; 762e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 763e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 764e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 765e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_find_variable_at - Find a given name variable at given address 766e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @sp_die: a function DIE 767e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @name: variable name 768e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @addr: address 769e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: a buffer for result DIE 770e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 771e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Find a variable DIE called @name at @addr in @sp_die. 772e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 773e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name, 774e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Addr addr, Dwarf_Die *die_mem) 775e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 776e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct __find_variable_param fvp = { .name = name, .addr = addr}; 777e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 778e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_find_child(sp_die, __die_find_variable_cb, (void *)&fvp, 779e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_mem); 780e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 781e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 782e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstatic int __die_find_member_cb(Dwarf_Die *die_mem, void *data) 783e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 784e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *name = data; 785e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 786e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if ((dwarf_tag(die_mem) == DW_TAG_member) && 787e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_compare_name(die_mem, name)) 788e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_END; 789e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 790e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return DIE_FIND_CB_SIBLING; 791e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 792e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 793e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 794e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_find_member - Find a given name member in a data structure 795e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @st_die: a data structure type DIE 796e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @name: member name 797e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @die_mem: a buffer for result DIE 798e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 799e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Find a member DIE called @name in @st_die. 800e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 801e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengDwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name, 802e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die *die_mem) 803e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 804e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return die_find_child(st_die, __die_find_member_cb, (void *)name, 805e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng die_mem); 806e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 807e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 808e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 809e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_typename - Get the name of given variable DIE 810e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @vr_die: a variable DIE 811e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @buf: a buffer for result type name 812e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @len: a max-length of @buf 813e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 814e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get the name of @vr_die and stores it to @buf. Return the actual length 815e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * of type name if succeeded. Return -E2BIG if @len is not enough long, and 816e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Return -ENOENT if failed to find type name. 817e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Note that the result will stores typedef name if possible, and stores 818e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * "*(function_type)" if the type is a function pointer. 819e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 820e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint die_get_typename(Dwarf_Die *vr_die, char *buf, int len) 821e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 822e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng Dwarf_Die type; 823e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int tag, ret, ret2; 824e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *tmp = ""; 825e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 826e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (__die_get_real_type(vr_die, &type) == NULL) 827e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 828e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 829e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tag = dwarf_tag(&type); 830e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (tag == DW_TAG_array_type || tag == DW_TAG_pointer_type) 831e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tmp = "*"; 832e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else if (tag == DW_TAG_subroutine_type) { 833e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Function pointer */ 834e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = snprintf(buf, len, "(function_type)"); 835e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (ret >= len) ? -E2BIG : ret; 836e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } else { 837e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (!dwarf_diename(&type)) 838e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -ENOENT; 839e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (tag == DW_TAG_union_type) 840e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tmp = "union "; 841e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else if (tag == DW_TAG_structure_type) 842e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tmp = "struct "; 843e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng else if (tag == DW_TAG_enumeration_type) 844e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng tmp = "enum "; 845e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* Write a base name */ 846e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = snprintf(buf, len, "%s%s", tmp, dwarf_diename(&type)); 847e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return (ret >= len) ? -E2BIG : ret; 848e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 849e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = die_get_typename(&type, buf, len); 850e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret > 0) { 851e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret2 = snprintf(buf + ret, len - ret, "%s", tmp); 852e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = (ret2 >= len - ret) ? -E2BIG : ret2 + ret; 853e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 854e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return ret; 855e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 856e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 857e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/** 858e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * die_get_varname - Get the name and type of given variable DIE 859e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @vr_die: a variable DIE 860e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @buf: a buffer for type and variable name 861e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * @len: the max-length of @buf 862e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 863e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Get the name and type of @vr_die and stores it in @buf as "type\tname". 864e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 865e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint die_get_varname(Dwarf_Die *vr_die, char *buf, int len) 866e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 867e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int ret, ret2; 868e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 869e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = die_get_typename(vr_die, buf, len); 870e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret < 0) { 871e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("Failed to get type, make it unknown.\n"); 872e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = snprintf(buf, len, "(unknown_type)"); 873e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 874e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (ret > 0) { 875e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret2 = snprintf(buf + ret, len - ret, "\t%s", 876e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng dwarf_diename(vr_die)); 877e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ret = (ret2 >= len - ret) ? -E2BIG : ret2 + ret; 878e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 879e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return ret; 880e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 881e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 882