diff options
Diffstat (limited to 'rtemstoolkit/elftoolchain/libdwarf/dwarf_die.c')
| -rw-r--r-- | rtemstoolkit/elftoolchain/libdwarf/dwarf_die.c | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/rtemstoolkit/elftoolchain/libdwarf/dwarf_die.c b/rtemstoolkit/elftoolchain/libdwarf/dwarf_die.c new file mode 100644 index 0000000..de6351a --- /dev/null +++ b/rtemstoolkit/elftoolchain/libdwarf/dwarf_die.c @@ -0,0 +1,413 @@ +/*- + * Copyright (c) 2007 John Birrell (jb@freebsd.org) + * Copyright (c) 2009,2011,2014 Kai Wang + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "_libdwarf.h" + +ELFTC_VCSID("$Id: dwarf_die.c 3039 2014-05-18 15:10:56Z kaiwang27 $"); + +int +dwarf_child(Dwarf_Die die, Dwarf_Die *ret_die, Dwarf_Error *error) +{ + Dwarf_Debug dbg; + Dwarf_Section *ds; + Dwarf_CU cu; + int ret; + + dbg = die != NULL ? die->die_dbg : NULL; + + if (die == NULL || ret_die == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + if (die->die_ab->ab_children == DW_CHILDREN_no) + return (DW_DLV_NO_ENTRY); + + dbg = die->die_dbg; + cu = die->die_cu; + ds = cu->cu_is_info ? dbg->dbg_info_sec : dbg->dbg_types_sec; + ret = _dwarf_die_parse(die->die_dbg, ds, cu, cu->cu_dwarf_size, + die->die_next_off, cu->cu_next_offset, ret_die, 0, error); + + if (ret == DW_DLE_NO_ENTRY) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } else if (ret != DW_DLE_NONE) + return (DW_DLV_ERROR); + + return (DW_DLV_OK); +} + +int +dwarf_siblingof_b(Dwarf_Debug dbg, Dwarf_Die die, Dwarf_Die *ret_die, + Dwarf_Bool is_info, Dwarf_Error *error) +{ + Dwarf_CU cu; + Dwarf_Attribute at; + Dwarf_Section *ds; + uint64_t offset; + int ret, search_sibling; + + if (dbg == NULL || ret_die == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + ds = is_info ? dbg->dbg_info_sec : dbg->dbg_types_sec; + cu = is_info ? dbg->dbg_cu_current : dbg->dbg_tu_current; + + if (cu == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_DIE_NO_CU_CONTEXT); + return (DW_DLV_ERROR); + } + + /* Application requests the first DIE in this CU. */ + if (die == NULL) + return (dwarf_offdie_b(dbg, cu->cu_1st_offset, is_info, + ret_die, error)); + + /* + * Check if the `is_info' flag matches the debug section the + * DIE belongs to. + */ + if (is_info != die->die_cu->cu_is_info) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + /* + * If the DIE doesn't have any children, its sibling sits next + * right to it. + */ + search_sibling = 0; + if (die->die_ab->ab_children == DW_CHILDREN_no) + offset = die->die_next_off; + else { + /* + * Look for DW_AT_sibling attribute for the offset of + * its sibling. + */ + if ((at = _dwarf_attr_find(die, DW_AT_sibling)) != NULL) { + if (at->at_form != DW_FORM_ref_addr) + offset = at->u[0].u64 + cu->cu_offset; + else + offset = at->u[0].u64; + } else { + offset = die->die_next_off; + search_sibling = 1; + } + } + + ret = _dwarf_die_parse(die->die_dbg, ds, cu, cu->cu_dwarf_size, offset, + cu->cu_next_offset, ret_die, search_sibling, error); + + if (ret == DW_DLE_NO_ENTRY) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } else if (ret != DW_DLE_NONE) + return (DW_DLV_ERROR); + + return (DW_DLV_OK); +} + + +int +dwarf_siblingof(Dwarf_Debug dbg, Dwarf_Die die, Dwarf_Die *ret_die, + Dwarf_Error *error) +{ + + return (dwarf_siblingof_b(dbg, die, ret_die, 1, error)); +} + +static int +_dwarf_search_die_within_cu(Dwarf_Debug dbg, Dwarf_Section *s, Dwarf_CU cu, + Dwarf_Off offset, Dwarf_Die *ret_die, Dwarf_Error *error) +{ + + assert(dbg != NULL && cu != NULL && ret_die != NULL); + + return (_dwarf_die_parse(dbg, s, cu, cu->cu_dwarf_size, + offset, cu->cu_next_offset, ret_die, 0, error)); +} + +int +dwarf_offdie_b(Dwarf_Debug dbg, Dwarf_Off offset, Dwarf_Bool is_info, + Dwarf_Die *ret_die, Dwarf_Error *error) +{ + Dwarf_Section *ds; + Dwarf_CU cu; + int ret; + + if (dbg == NULL || ret_die == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + ds = is_info ? dbg->dbg_info_sec : dbg->dbg_types_sec; + cu = is_info ? dbg->dbg_cu_current : dbg->dbg_tu_current; + + /* First search the current CU. */ + if (cu != NULL) { + if (offset > cu->cu_offset && offset < cu->cu_next_offset) { + ret = _dwarf_search_die_within_cu(dbg, ds, cu, offset, + ret_die, error); + if (ret == DW_DLE_NO_ENTRY) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } else if (ret != DW_DLE_NONE) + return (DW_DLV_ERROR); + return (DW_DLV_OK); + } + } + + /* Search other CUs. */ + ret = _dwarf_info_load(dbg, 1, is_info, error); + if (ret != DW_DLE_NONE) + return (DW_DLV_ERROR); + + if (is_info) { + STAILQ_FOREACH(cu, &dbg->dbg_cu, cu_next) { + if (offset < cu->cu_offset || + offset > cu->cu_next_offset) + continue; + ret = _dwarf_search_die_within_cu(dbg, ds, cu, offset, + ret_die, error); + if (ret == DW_DLE_NO_ENTRY) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } else if (ret != DW_DLE_NONE) + return (DW_DLV_ERROR); + return (DW_DLV_OK); + } + } else { + STAILQ_FOREACH(cu, &dbg->dbg_tu, cu_next) { + if (offset < cu->cu_offset || + offset > cu->cu_next_offset) + continue; + ret = _dwarf_search_die_within_cu(dbg, ds, cu, offset, + ret_die, error); + if (ret == DW_DLE_NO_ENTRY) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } else if (ret != DW_DLE_NONE) + return (DW_DLV_ERROR); + return (DW_DLV_OK); + } + } + + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); +} + +int +dwarf_offdie(Dwarf_Debug dbg, Dwarf_Off offset, Dwarf_Die *ret_die, + Dwarf_Error *error) +{ + + return (dwarf_offdie_b(dbg, offset, 1, ret_die, error)); +} + +int +dwarf_tag(Dwarf_Die die, Dwarf_Half *tag, Dwarf_Error *error) +{ + Dwarf_Debug dbg; + + dbg = die != NULL ? die->die_dbg : NULL; + + if (die == NULL || tag == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + assert(die->die_ab != NULL); + + *tag = (Dwarf_Half) die->die_ab->ab_tag; + + return (DW_DLV_OK); +} + +int +dwarf_dieoffset(Dwarf_Die die, Dwarf_Off *ret_offset, Dwarf_Error *error) +{ + Dwarf_Debug dbg; + + dbg = die != NULL ? die->die_dbg : NULL; + + if (die == NULL || ret_offset == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + *ret_offset = die->die_offset; + + return (DW_DLV_OK); +} + +int +dwarf_die_CU_offset(Dwarf_Die die, Dwarf_Off *ret_offset, Dwarf_Error *error) +{ + Dwarf_Debug dbg; + Dwarf_CU cu; + + dbg = die != NULL ? die->die_dbg : NULL; + + if (die == NULL || ret_offset == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + cu = die->die_cu; + assert(cu != NULL); + + *ret_offset = die->die_offset - cu->cu_offset; + + return (DW_DLV_OK); +} + +int +dwarf_die_CU_offset_range(Dwarf_Die die, Dwarf_Off *cu_offset, + Dwarf_Off *cu_length, Dwarf_Error *error) +{ + Dwarf_Debug dbg; + Dwarf_CU cu; + + dbg = die != NULL ? die->die_dbg : NULL; + + if (die == NULL || cu_offset == NULL || cu_length == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + cu = die->die_cu; + assert(cu != NULL); + + *cu_offset = cu->cu_offset; + *cu_length = cu->cu_length + cu->cu_length_size; + + return (DW_DLV_OK); +} + +int +dwarf_diename(Dwarf_Die die, char **ret_name, Dwarf_Error *error) +{ + Dwarf_Debug dbg; + + dbg = die != NULL ? die->die_dbg : NULL; + + if (die == NULL || ret_name == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + if (die->die_name == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } + + *ret_name = die->die_name; + + return (DW_DLV_OK); +} + +int +dwarf_die_abbrev_code(Dwarf_Die die) +{ + + assert(die != NULL); + + return (die->die_abnum); +} + +int +dwarf_get_cu_die_offset_given_cu_header_offset_b(Dwarf_Debug dbg, + Dwarf_Off in_cu_header_offset, Dwarf_Bool is_info, + Dwarf_Off *out_cu_die_offset, Dwarf_Error *error) +{ + Dwarf_CU cu; + + if (dbg == NULL || out_cu_die_offset == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + if (is_info) { + STAILQ_FOREACH(cu, &dbg->dbg_cu, cu_next) { + if (cu->cu_offset == in_cu_header_offset) { + *out_cu_die_offset = cu->cu_1st_offset; + break; + } + } + } else { + STAILQ_FOREACH(cu, &dbg->dbg_tu, cu_next) { + if (cu->cu_offset == in_cu_header_offset) { + *out_cu_die_offset = cu->cu_1st_offset; + break; + } + } + } + + if (cu == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); + return (DW_DLV_NO_ENTRY); + } + + return (DW_DLV_OK); +} + +int +dwarf_get_cu_die_offset_given_cu_header_offset(Dwarf_Debug dbg, + Dwarf_Off in_cu_header_offset, Dwarf_Off *out_cu_die_offset, + Dwarf_Error *error) +{ + + return (dwarf_get_cu_die_offset_given_cu_header_offset_b(dbg, + in_cu_header_offset, 1, out_cu_die_offset, error)); +} + +int +dwarf_get_address_size(Dwarf_Debug dbg, Dwarf_Half *addr_size, + Dwarf_Error *error) +{ + + if (dbg == NULL || addr_size == NULL) { + DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); + return (DW_DLV_ERROR); + } + + *addr_size = dbg->dbg_pointer_size; + + return (DW_DLV_OK); +} + +Dwarf_Bool +dwarf_get_die_infotypes_flag(Dwarf_Die die) +{ + + assert(die != NULL); + + return (die->die_cu->cu_is_info); +} |