freebsd-dev/contrib/elftoolchain/libdwarf/dwarf_pro_frame.c

196 lines
5.4 KiB
C

/*-
* Copyright (c) 2010 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_pro_frame.c 2074 2011-10-27 03:34:33Z jkoshy $");
Dwarf_P_Fde
dwarf_new_fde(Dwarf_P_Debug dbg, Dwarf_Error *error)
{
Dwarf_P_Fde fde;
if (dbg == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_BADADDR);
}
if ((fde = calloc(1, sizeof(struct _Dwarf_Fde))) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLV_BADADDR);
}
fde->fde_dbg = dbg;
return (fde);
}
Dwarf_Unsigned
dwarf_add_frame_cie(Dwarf_P_Debug dbg, char *augmenter, Dwarf_Small caf,
Dwarf_Small daf, Dwarf_Small ra, Dwarf_Ptr initinst,
Dwarf_Unsigned inst_len, Dwarf_Error *error)
{
Dwarf_P_Cie cie;
if (dbg == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_NOCOUNT);
}
if ((cie = calloc(1, sizeof(struct _Dwarf_Cie))) == NULL) {
DWARF_SET_ERROR(dbg, error,DW_DLE_MEMORY);
return (DW_DLV_NOCOUNT);
}
STAILQ_INSERT_TAIL(&dbg->dbgp_cielist, cie, cie_next);
cie->cie_index = dbg->dbgp_cielen++;
if (augmenter != NULL) {
cie->cie_augment = (uint8_t *) strdup(augmenter);
if (cie->cie_augment == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLV_NOCOUNT);
}
}
cie->cie_caf = caf;
cie->cie_daf = (int8_t) daf; /* daf is signed. */
cie->cie_ra = ra;
if (initinst != NULL && inst_len > 0) {
cie->cie_initinst = malloc((size_t) inst_len);
if (cie->cie_initinst == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLV_NOCOUNT);
}
memcpy(cie->cie_initinst, initinst, inst_len);
cie->cie_instlen = inst_len;
}
return (cie->cie_index);
}
Dwarf_Unsigned
dwarf_add_frame_fde(Dwarf_P_Debug dbg, Dwarf_P_Fde fde, Dwarf_P_Die die,
Dwarf_Unsigned cie, Dwarf_Addr virt_addr, Dwarf_Unsigned code_len,
Dwarf_Unsigned symbol_index, Dwarf_Error *error)
{
return (dwarf_add_frame_fde_b(dbg, fde, die, cie, virt_addr, code_len,
symbol_index, 0, 0, error));
}
Dwarf_Unsigned
dwarf_add_frame_fde_b(Dwarf_P_Debug dbg, Dwarf_P_Fde fde, Dwarf_P_Die die,
Dwarf_Unsigned cie, Dwarf_Addr virt_addr, Dwarf_Unsigned code_len,
Dwarf_Unsigned symbol_index, Dwarf_Unsigned end_symbol_index,
Dwarf_Addr offset_from_end_sym, Dwarf_Error *error)
{
Dwarf_P_Cie ciep;
int i;
/*
* XXX SGI libdwarf need the DIE arg because later it will insert a
* DW_AT_MIPS_fde attribute, which points to the offset the
* correspoding FDE, into this DIE. Do we need this?
*/
(void) die;
if (dbg == NULL || fde == NULL || fde->fde_dbg != dbg) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_NOCOUNT);
}
ciep = STAILQ_FIRST(&dbg->dbgp_cielist);
for (i = 0; (Dwarf_Unsigned) i < cie; i++) {
ciep = STAILQ_NEXT(ciep, cie_next);
if (ciep == NULL)
break;
}
if (ciep == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_NOCOUNT);
}
if (end_symbol_index > 0 &&
(dbg->dbgp_flags & DW_DLC_SYMBOLIC_RELOCATIONS) == 0) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_NOCOUNT);
}
fde->fde_cie = ciep;
fde->fde_initloc = virt_addr;
fde->fde_adrange = code_len;
fde->fde_symndx = symbol_index;
fde->fde_esymndx = end_symbol_index;
fde->fde_eoff = offset_from_end_sym;
STAILQ_INSERT_TAIL(&dbg->dbgp_fdelist, fde, fde_next);
return (dbg->dbgp_fdelen++);
}
Dwarf_P_Fde
dwarf_fde_cfa_offset(Dwarf_P_Fde fde, Dwarf_Unsigned reg, Dwarf_Signed offset,
Dwarf_Error *error)
{
int ret;
Dwarf_Debug dbg;
dbg = fde != NULL ? fde->fde_dbg : NULL;
if (fde == NULL || reg > 0x3f) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_BADADDR);
}
ret = _dwarf_frame_fde_add_inst(fde, DW_CFA_offset | (reg & 0x3f),
offset, 0, error);
if (ret != DW_DLE_NONE)
return (DW_DLV_BADADDR);
return (fde);
}
Dwarf_P_Fde
dwarf_add_fde_inst(Dwarf_P_Fde fde, Dwarf_Small op, Dwarf_Unsigned val1,
Dwarf_Unsigned val2, Dwarf_Error *error)
{
int ret;
if (fde == NULL) {
DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
return (DW_DLV_BADADDR);
}
ret = _dwarf_frame_fde_add_inst(fde, op, val1, val2, error);
if (ret != DW_DLE_NONE)
return (DW_DLV_BADADDR);
return (fde);
}