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/* Get macro information.
Copyright (C) 2002, 2003, 2004, 2005 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <dwarf.h>
#include <string.h>
#include <libdwP.h>
ptrdiff_t
dwarf_getmacros (die, callback, arg, offset)
Dwarf_Die *die;
int (*callback) (Dwarf_Macro *, void *);
void *arg;
ptrdiff_t offset;
{
/* Get the appropriate attribute. */
Dwarf_Attribute attr;
if (INTUSE(dwarf_attr) (die, DW_AT_macro_info, &attr) == NULL)
return -1;
/* Offset into the .debug_macinfo section. */
Dwarf_Word macoff;
if (INTUSE(dwarf_formudata) (&attr, &macoff) != 0)
return -1;
const unsigned char *readp
= die->cu->dbg->sectiondata[IDX_debug_macinfo]->d_buf + offset;
const unsigned char *readendp
= readp + die->cu->dbg->sectiondata[IDX_debug_macinfo]->d_size;
if (readp == readendp)
return 0;
if (*readp != DW_MACINFO_start_file)
goto invalid;
while (readp < readendp)
{
unsigned int opcode = *readp++;
unsigned int u128;
unsigned int u128_2 = 0;
const char *str = NULL;
const unsigned char *endp;
switch (opcode)
{
case DW_MACINFO_define:
case DW_MACINFO_undef:
case DW_MACINFO_vendor_ext:
/* For the first two opcodes the parameters are
line, string
For the latter
number, string.
We can treat these cases together. */
get_uleb128 (u128, readp);
endp = memchr (readp, '\0', readendp - readp);
if (endp == NULL)
goto invalid;
str = (char *) readp;
readp = endp + 1;
break;
case DW_MACINFO_start_file:
/* The two parameters are line and file index. */
get_uleb128 (u128, readp);
get_uleb128 (u128_2, readp);
break;
case DW_MACINFO_end_file:
/* No parameters for this one. */
u128 = 0;
break;
case 0:
/* Nothing more to do. */
return 0;
default:
goto invalid;
}
Dwarf_Macro mac;
mac.opcode = opcode;
mac.param1 = u128;
if (str == NULL)
mac.param2.u = u128_2;
else
mac.param2.s = str;
if (callback (&mac, arg) != DWARF_CB_OK)
return (readp
- ((unsigned char *) die->cu->dbg->sectiondata[IDX_debug_macinfo]->d_buf
+ offset));
}
/* If we come here the termination of the data for the CU is not
present. */
invalid:
__libdw_seterrno (DWARF_E_INVALID_DWARF);
return -1;
}
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