281 lines
7.0 KiB
C
281 lines
7.0 KiB
C
/*-
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* Copyright (c) 2010 Kai Wang
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "_libdwarf.h"
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ELFTC_VCSID("$Id: libdwarf_sections.c 3041 2014-05-18 15:11:03Z kaiwang27 $");
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#define _SECTION_INIT_SIZE 128
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int
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_dwarf_section_init(Dwarf_P_Debug dbg, Dwarf_P_Section *dsp, const char *name,
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int pseudo, Dwarf_Error *error)
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{
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Dwarf_P_Section ds;
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assert(dbg != NULL && dsp != NULL && name != NULL);
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if ((ds = calloc(1, sizeof(struct _Dwarf_P_Section))) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
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return (DW_DLE_MEMORY);
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}
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if ((ds->ds_name = strdup(name)) == NULL) {
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free(ds);
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DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
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return (DW_DLE_MEMORY);
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}
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if (!pseudo) {
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ds->ds_cap = _SECTION_INIT_SIZE;
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if ((ds->ds_data = malloc((size_t) ds->ds_cap)) == NULL) {
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free(ds->ds_name);
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free(ds);
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DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
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return (DW_DLE_MEMORY);
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}
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STAILQ_INSERT_TAIL(&dbg->dbgp_seclist, ds, ds_next);
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dbg->dbgp_seccnt++;
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}
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*dsp = ds;
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return (DW_DLE_NONE);
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}
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void
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_dwarf_section_free(Dwarf_P_Debug dbg, Dwarf_P_Section *dsp)
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{
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Dwarf_P_Section ds, tds;
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assert(dbg != NULL && dsp != NULL);
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if (*dsp == NULL)
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return;
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STAILQ_FOREACH_SAFE(ds, &dbg->dbgp_seclist, ds_next, tds) {
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if (ds == *dsp) {
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STAILQ_REMOVE(&dbg->dbgp_seclist, ds, _Dwarf_P_Section,
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ds_next);
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dbg->dbgp_seccnt--;
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break;
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}
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}
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ds = *dsp;
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if (ds->ds_name)
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free(ds->ds_name);
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if (ds->ds_data)
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free(ds->ds_data);
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free(ds);
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*dsp = NULL;
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}
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int
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_dwarf_pro_callback(Dwarf_P_Debug dbg, char *name, int size,
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Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link,
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Dwarf_Unsigned info, Dwarf_Unsigned *symndx, int *error)
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{
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int e, ret, isymndx;
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assert(dbg != NULL && name != NULL && symndx != NULL);
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if (dbg->dbgp_func_b)
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ret = dbg->dbgp_func_b(name, size, type, flags, link, info,
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symndx, &e);
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else {
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ret = dbg->dbgp_func(name, size, type, flags, link, info,
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&isymndx, &e);
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*symndx = isymndx;
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}
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if (ret < 0) {
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if (error)
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*error = e;
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}
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return (ret);
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}
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int
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_dwarf_section_callback(Dwarf_P_Debug dbg, Dwarf_P_Section ds,
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Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link,
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Dwarf_Unsigned info, Dwarf_Error *error)
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{
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int ret, ndx;
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ndx = _dwarf_pro_callback(dbg, ds->ds_name, (int) ds->ds_size,
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type, flags, link, info, &ds->ds_symndx, NULL);
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if (ndx < 0) {
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ret = DW_DLE_ELF_SECT_ERR;
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DWARF_SET_ERROR(dbg, error, ret);
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return (ret);
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}
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ds->ds_ndx = ndx;
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return (DW_DLE_NONE);
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}
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int
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_dwarf_generate_sections(Dwarf_P_Debug dbg, Dwarf_Error *error)
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{
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int ret;
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/* Produce .debug_info section. */
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if ((ret = _dwarf_info_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_abbrev section. */
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if ((ret = _dwarf_abbrev_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_line section. */
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if ((ret = _dwarf_lineno_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_frame section. */
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if ((ret = _dwarf_frame_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_aranges section. */
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if ((ret = _dwarf_arange_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_macinfo section. */
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if ((ret = _dwarf_macinfo_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_pubnames section. */
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if ((ret = _dwarf_nametbl_gen(dbg, ".debug_pubnames", dbg->dbgp_pubs,
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error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_weaknames section. */
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if ((ret = _dwarf_nametbl_gen(dbg, ".debug_weaknames", dbg->dbgp_weaks,
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error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_funcnames section. */
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if ((ret = _dwarf_nametbl_gen(dbg, ".debug_funcnames", dbg->dbgp_funcs,
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error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_typenames section. */
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if ((ret = _dwarf_nametbl_gen(dbg, ".debug_typenames", dbg->dbgp_types,
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error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_varnames section. */
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if ((ret = _dwarf_nametbl_gen(dbg, ".debug_varnames", dbg->dbgp_vars,
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error)) != DW_DLE_NONE)
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return (ret);
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/* Produce .debug_str section. */
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if ((ret = _dwarf_strtab_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Finally, update and generate all relocation sections. */
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if ((ret = _dwarf_reloc_gen(dbg, error)) != DW_DLE_NONE)
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return (ret);
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/* Set section/relocation iterator to the first element. */
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dbg->dbgp_secpos = STAILQ_FIRST(&dbg->dbgp_seclist);
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dbg->dbgp_drspos = STAILQ_FIRST(&dbg->dbgp_drslist);
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return (DW_DLE_NONE);
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}
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Dwarf_Section *
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_dwarf_find_section(Dwarf_Debug dbg, const char *name)
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{
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Dwarf_Section *ds;
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Dwarf_Half i;
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assert(dbg != NULL && name != NULL);
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for (i = 0; i < dbg->dbg_seccnt; i++) {
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ds = &dbg->dbg_section[i];
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if (ds->ds_name != NULL && !strcmp(ds->ds_name, name))
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return (ds);
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}
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return (NULL);
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}
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Dwarf_Section *
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_dwarf_find_next_types_section(Dwarf_Debug dbg, Dwarf_Section *ds)
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{
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assert(dbg != NULL);
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if (ds == NULL)
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return (_dwarf_find_section(dbg, ".debug_types"));
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assert(ds->ds_name != NULL);
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do {
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ds++;
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if (ds->ds_name != NULL &&
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!strcmp(ds->ds_name, ".debug_types"))
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return (ds);
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} while (ds->ds_name != NULL);
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return (NULL);
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}
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Dwarf_P_Section
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_dwarf_pro_find_section(Dwarf_P_Debug dbg, const char *name)
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{
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Dwarf_P_Section ds;
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assert(dbg != NULL && name != NULL);
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STAILQ_FOREACH(ds, &dbg->dbgp_seclist, ds_next) {
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if (ds->ds_name != NULL && !strcmp(ds->ds_name ,name))
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return (ds);
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}
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return (NULL);
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}
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void
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_dwarf_section_cleanup(Dwarf_P_Debug dbg)
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{
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Dwarf_P_Section ds, tds;
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assert(dbg != NULL && dbg->dbg_mode == DW_DLC_WRITE);
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STAILQ_FOREACH_SAFE(ds, &dbg->dbgp_seclist, ds_next, tds) {
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STAILQ_REMOVE(&dbg->dbgp_seclist, ds, _Dwarf_P_Section,
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ds_next);
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if (ds->ds_name)
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free(ds->ds_name);
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if (ds->ds_data)
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free(ds->ds_data);
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free(ds);
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}
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dbg->dbgp_seccnt = 0;
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dbg->dbgp_secpos = 0;
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}
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