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wine/dlls/dbghelp/dwarf.c

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/*
* File dwarf.c - read dwarf2 information from the ELF modules
*
* Copyright (C) 2005, Raphael Junqueira
* Copyright (C) 2006, Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <sys/types.h>
#include <fcntl.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdio.h>
#ifndef PATH_MAX
#define PATH_MAX MAX_PATH
#endif
#include <assert.h>
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winnls.h"
#include "dbghelp_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
/* FIXME:
* - Functions:
* o unspecified parameters
* o inlined functions
* o Debug{Start|End}Point
* o CFA
* - Udt
* o proper types loading (nesting)
*/
#if 0
static void dump(const void* ptr, unsigned len)
{
int i, j;
BYTE msg[128];
static const char hexof[] = "0123456789abcdef";
const BYTE* x = (const BYTE*)ptr;
for (i = 0; i < len; i += 16)
{
sprintf(msg, "%08x: ", i);
memset(msg + 10, ' ', 3 * 16 + 1 + 16);
for (j = 0; j < min(16, len - i); j++)
{
msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
msg[10 + 3 * j + 2] = ' ';
msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
x[i + j] : '.';
}
msg[10 + 3 * 16] = ' ';
msg[10 + 3 * 16 + 1 + 16] = '\0';
TRACE("%s\n", msg);
}
}
#endif
/**
*
* Main Specs:
* http://www.eagercon.com/dwarf/dwarf3std.htm
* http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
*
* dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
*
* example of projects who do dwarf2 parsing:
* http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
* http://elis.ugent.be/diota/log/ltrace_elf.c
*/
#include "dwarf.h"
/**
* Parsers
*/
typedef struct dwarf2_abbrev_entry_attr_s {
unsigned long attribute;
unsigned long form;
struct dwarf2_abbrev_entry_attr_s* next;
} dwarf2_abbrev_entry_attr_t;
typedef struct dwarf2_abbrev_entry_s
{
unsigned long entry_code;
unsigned long tag;
unsigned char have_child;
unsigned num_attr;
dwarf2_abbrev_entry_attr_t* attrs;
} dwarf2_abbrev_entry_t;
struct dwarf2_block
{
unsigned size;
const unsigned char* ptr;
};
union attribute
{
unsigned long uvalue;
long svalue;
const char* string;
struct dwarf2_block* block;
};
typedef struct dwarf2_debug_info_s
{
unsigned long offset;
const dwarf2_abbrev_entry_t*abbrev;
struct symt* symt;
union attribute* attributes;
struct vector children;
} dwarf2_debug_info_t;
typedef struct dwarf2_section_s
{
const unsigned char* address;
unsigned size;
} dwarf2_section_t;
enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_max};
typedef struct dwarf2_traverse_context_s
{
const dwarf2_section_t* sections;
unsigned section;
const unsigned char* data;
const unsigned char* start_data;
const unsigned char* end_data;
unsigned long offset;
unsigned char word_size;
} dwarf2_traverse_context_t;
typedef struct dwarf2_parse_context_s
{
struct pool pool;
struct module* module;
const struct elf_thunk_area*thunks;
struct sparse_array abbrev_table;
struct sparse_array debug_info_table;
unsigned char word_size;
} dwarf2_parse_context_t;
/* forward declarations */
static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
{
unsigned char uvalue = *(const unsigned char*) ctx->data;
ctx->data += 1;
return uvalue;
}
static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
{
unsigned short uvalue = *(const unsigned short*) ctx->data;
ctx->data += 2;
return uvalue;
}
static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
{
unsigned long uvalue = *(const unsigned int*) ctx->data;
ctx->data += 4;
return uvalue;
}
static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
{
unsigned long ret = 0;
unsigned char byte;
unsigned shift = 0;
assert( NULL != ctx );
do
{
byte = dwarf2_parse_byte(ctx);
ret |= (byte & 0x7f) << shift;
shift += 7;
} while (byte & 0x80);
return ret;
}
static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
{
long ret = 0;
unsigned char byte;
unsigned shift = 0;
const unsigned size = sizeof(int) * 8;
assert( NULL != ctx );
do
{
byte = dwarf2_parse_byte(ctx);
ret |= (byte & 0x7f) << shift;
shift += 7;
} while (byte & 0x80);
/* as spec: sign bit of byte is 2nd high order bit (80x40)
* -> 0x80 is used as flag.
*/
if ((shift < size) && (byte & 0x40))
{
ret |= - (1 << shift);
}
return ret;
}
static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
{
unsigned long ret;
switch (ctx->word_size)
{
case 4:
ret = dwarf2_parse_u4(ctx);
break;
default:
FIXME("Unsupported Word Size %u\n", ctx->word_size);
ret = 0;
}
return ret;
}
static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
{
return wine_dbg_sprintf("ctx(0x%x)", ctx->data - ctx->sections[ctx->section].address);
}
static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
{
return wine_dbg_sprintf("ctx(%p,%s)", ctx, ctx->module->module.ModuleName);
}
static const char* dwarf2_debug_di(dwarf2_debug_info_t* di)
{
return wine_dbg_sprintf("debug_info(offset:0x%lx,abbrev:%p,symt:%p)",
di->offset, di->abbrev, di->symt);
}
static dwarf2_abbrev_entry_t*
dwarf2_abbrev_table_find_entry(struct sparse_array* abbrev_table,
unsigned long entry_code)
{
assert( NULL != abbrev_table );
return sparse_array_find(abbrev_table, entry_code);
}
static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
struct sparse_array* abbrev_table,
struct pool* pool)
{
unsigned long entry_code;
dwarf2_abbrev_entry_t* abbrev_entry;
dwarf2_abbrev_entry_attr_t* new = NULL;
dwarf2_abbrev_entry_attr_t* last = NULL;
unsigned long attribute;
unsigned long form;
assert( NULL != abbrev_ctx );
TRACE("%s, end at %p\n",
dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
while (abbrev_ctx->data < abbrev_ctx->end_data)
{
TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
TRACE("found entry_code %lu\n", entry_code);
if (!entry_code)
{
TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
break;
}
abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
assert( NULL != abbrev_entry );
abbrev_entry->entry_code = entry_code;
abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
abbrev_entry->attrs = NULL;
abbrev_entry->num_attr = 0;
TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
abbrev_table, sparse_array_length(abbrev_table),
entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
last = NULL;
while (1)
{
attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
form = dwarf2_leb128_as_unsigned(abbrev_ctx);
if (!attribute) break;
new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
assert(new);
new->attribute = attribute;
new->form = form;
new->next = NULL;
if (abbrev_entry->attrs) last->next = new;
else abbrev_entry->attrs = new;
last = new;
abbrev_entry->num_attr++;
}
}
TRACE("found %u entries\n", sparse_array_length(abbrev_table));
}
static void dwarf2_parse_attr_into_di(struct pool* pool,
dwarf2_traverse_context_t* ctx,
const dwarf2_abbrev_entry_attr_t* abbrev_attr,
union attribute* attr)
{
TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
switch (abbrev_attr->form) {
case DW_FORM_ref_addr:
case DW_FORM_addr:
attr->uvalue = dwarf2_parse_addr(ctx);
TRACE("addr<0x%lx>\n", attr->uvalue);
break;
case DW_FORM_flag:
attr->uvalue = dwarf2_parse_byte(ctx);
TRACE("flag<0x%lx>\n", attr->uvalue);
break;
case DW_FORM_data1:
attr->uvalue = dwarf2_parse_byte(ctx);
TRACE("data1<%lu>\n", attr->uvalue);
break;
case DW_FORM_data2:
attr->uvalue = dwarf2_parse_u2(ctx);
TRACE("data2<%lu>\n", attr->uvalue);
break;
case DW_FORM_data4:
attr->uvalue = dwarf2_parse_u4(ctx);
TRACE("data4<%lu>\n", attr->uvalue);
break;
case DW_FORM_data8:
FIXME("Unhandled 64bits support\n");
ctx->data += 8;
break;
case DW_FORM_ref1:
attr->uvalue = ctx->offset + dwarf2_parse_byte(ctx);
TRACE("ref1<0x%lx>\n", attr->uvalue);
break;
case DW_FORM_ref2:
attr->uvalue = ctx->offset + dwarf2_parse_u2(ctx);
TRACE("ref2<0x%lx>\n", attr->uvalue);
break;
case DW_FORM_ref4:
attr->uvalue = ctx->offset + dwarf2_parse_u4(ctx);
TRACE("ref4<0x%lx>\n", attr->uvalue);
break;
case DW_FORM_ref8:
FIXME("Unhandled 64 bit support\n");
ctx->data += 8;
break;
case DW_FORM_sdata:
attr->svalue = dwarf2_leb128_as_signed(ctx);
break;
case DW_FORM_ref_udata:
attr->uvalue = dwarf2_leb128_as_unsigned(ctx);
break;
case DW_FORM_udata:
attr->uvalue = dwarf2_leb128_as_unsigned(ctx);
break;
case DW_FORM_string:
attr->string = (const char*)ctx->data;
ctx->data += strlen(attr->string) + 1;
TRACE("string<%s>\n", attr->string);
break;
case DW_FORM_strp:
{
unsigned long offset = dwarf2_parse_u4(ctx);
attr->string = (const char*)ctx->sections[section_string].address + offset;
}
TRACE("strp<%s>\n", attr->string);
break;
case DW_FORM_block:
attr->block = pool_alloc(pool, sizeof(struct dwarf2_block));
attr->block->size = dwarf2_leb128_as_unsigned(ctx);
attr->block->ptr = ctx->data;
ctx->data += attr->block->size;
break;
case DW_FORM_block1:
attr->block = pool_alloc(pool, sizeof(struct dwarf2_block));
attr->block->size = dwarf2_parse_byte(ctx);
attr->block->ptr = ctx->data;
ctx->data += attr->block->size;
break;
case DW_FORM_block2:
attr->block = pool_alloc(pool, sizeof(struct dwarf2_block));
attr->block->size = dwarf2_parse_u2(ctx);
attr->block->ptr = ctx->data;
ctx->data += attr->block->size;
break;
case DW_FORM_block4:
attr->block = pool_alloc(pool, sizeof(struct dwarf2_block));
attr->block->size = dwarf2_parse_u4(ctx);
attr->block->ptr = ctx->data;
ctx->data += attr->block->size;
break;
default:
FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
break;
}
}
static BOOL dwarf2_find_attribute(const dwarf2_debug_info_t* di,
unsigned at, union attribute* attr)
{
unsigned i;
dwarf2_abbrev_entry_attr_t* abbrev_attr;
for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
{
if (abbrev_attr->attribute == at)
{
*attr = di->attributes[i];
return TRUE;
}
}
return FALSE;
}
static void dwarf2_find_name(dwarf2_parse_context_t* ctx,
const dwarf2_debug_info_t* di,
union attribute* attr, const char* pfx)
{
static int index;
if (!dwarf2_find_attribute(di, DW_AT_name, attr))
{
char* tmp = pool_alloc(&ctx->pool, strlen(pfx) + 16);
if (tmp) sprintf(tmp, "%s_%d", pfx, index++);
attr->string = tmp;
}
}
static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
struct symt_compiland*);
#define Wine_DW_no_register -1
#define Wine_DW_frame_register -2
static unsigned long dwarf2_compute_location(dwarf2_parse_context_t* ctx,
struct dwarf2_block* block,
int* in_register)
{
unsigned long loc[64];
unsigned stk;
if (in_register) *in_register = Wine_DW_no_register;
loc[stk = 0] = 0;
if (block->size)
{
dwarf2_traverse_context_t lctx;
unsigned char op;
BOOL piece_found = FALSE;
lctx.data = block->ptr;
lctx.end_data = block->ptr + block->size;
lctx.word_size = ctx->word_size;
while (lctx.data < lctx.end_data)
{
op = dwarf2_parse_byte(&lctx);
switch (op)
{
case DW_OP_addr: loc[++stk] = dwarf2_parse_addr(&lctx); break;
case DW_OP_const1u: loc[++stk] = dwarf2_parse_byte(&lctx); break;
case DW_OP_const1s: loc[++stk] = (long)(signed char)dwarf2_parse_byte(&lctx); break;
case DW_OP_const2u: loc[++stk] = dwarf2_parse_u2(&lctx); break;
case DW_OP_const2s: loc[++stk] = (long)(short)dwarf2_parse_u2(&lctx); break;
case DW_OP_const4u: loc[++stk] = dwarf2_parse_u4(&lctx); break;
case DW_OP_const4s: loc[++stk] = dwarf2_parse_u4(&lctx); break;
case DW_OP_constu: loc[++stk] = dwarf2_leb128_as_unsigned(&lctx); break;
case DW_OP_consts: loc[++stk] = dwarf2_leb128_as_signed(&lctx); break;
case DW_OP_plus_uconst:
loc[stk] += dwarf2_leb128_as_unsigned(&lctx); break;
case DW_OP_reg0: case DW_OP_reg1: case DW_OP_reg2: case DW_OP_reg3:
case DW_OP_reg4: case DW_OP_reg5: case DW_OP_reg6: case DW_OP_reg7:
case DW_OP_reg8: case DW_OP_reg9: case DW_OP_reg10: case DW_OP_reg11:
case DW_OP_reg12: case DW_OP_reg13: case DW_OP_reg14: case DW_OP_reg15:
case DW_OP_reg16: case DW_OP_reg17: case DW_OP_reg18: case DW_OP_reg19:
case DW_OP_reg20: case DW_OP_reg21: case DW_OP_reg22: case DW_OP_reg23:
case DW_OP_reg24: case DW_OP_reg25: case DW_OP_reg26: case DW_OP_reg27:
case DW_OP_reg28: case DW_OP_reg29: case DW_OP_reg30: case DW_OP_reg31:
if (in_register)
{
/* dbghelp APIs don't know how to cope with this anyway
* (for example 'long long' stored in two registers)
* FIXME: We should tell winedbg how to deal with it (sigh)
*/
if (!piece_found || (op - DW_OP_reg0 != *in_register + 1))
{
if (*in_register != Wine_DW_no_register)
FIXME("Only supporting one reg (%d -> %d)\n",
*in_register, op - DW_OP_reg0);
*in_register = op - DW_OP_reg0;
}
}
else FIXME("Found register, while not expecting it\n");
break;
case DW_OP_fbreg:
if (in_register)
{
if (*in_register != Wine_DW_no_register)
FIXME("Only supporting one reg (%d -> -2)\n", *in_register);
*in_register = Wine_DW_frame_register;
}
else FIXME("Found register, while not expecting it\n");
loc[++stk] = dwarf2_leb128_as_signed(&lctx);
break;
case DW_OP_piece:
{
unsigned sz = dwarf2_leb128_as_unsigned(&lctx);
WARN("Not handling OP_piece directly (size=%d)\n", sz);
piece_found = TRUE;
}
break;
default:
FIXME("Unhandled attr op: %x\n", op);
return loc[stk];
}
}
}
return loc[stk];
}
static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
const dwarf2_debug_info_t* di)
{
union attribute attr;
if (dwarf2_find_attribute(di, DW_AT_type, &attr))
{
dwarf2_debug_info_t* type;
type = sparse_array_find(&ctx->debug_info_table, attr.uvalue);
if (!type) FIXME("Unable to find back reference to type %lx\n", attr.uvalue);
if (!type->symt)
{
/* load the debug info entity */
dwarf2_load_one_entry(ctx, type, NULL);
}
return type->symt;
}
return NULL;
}
/******************************************************************
* dwarf2_read_one_debug_info
*
* Loads into memory one debug info entry, and recursively its children (if any)
*/
static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
dwarf2_traverse_context_t* traverse,
dwarf2_debug_info_t** pdi)
{
const dwarf2_abbrev_entry_t*abbrev;
unsigned long entry_code;
unsigned long offset;
dwarf2_debug_info_t* di;
dwarf2_debug_info_t* child;
dwarf2_debug_info_t** where;
dwarf2_abbrev_entry_attr_t* attr;
unsigned i;
union attribute sibling;
offset = traverse->data - traverse->sections[traverse->section].address;
entry_code = dwarf2_leb128_as_unsigned(traverse);
TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
if (!entry_code)
{
*pdi = NULL;
return TRUE;
}
abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
if (!abbrev)
{
WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
return FALSE;
}
di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
if (!di) return FALSE;
di->offset = offset;
di->abbrev = abbrev;
di->symt = NULL;
if (abbrev->num_attr)
{
di->attributes = pool_alloc(&ctx->pool,
abbrev->num_attr * sizeof(union attribute));
for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
{
dwarf2_parse_attr_into_di(&ctx->pool, traverse, attr, &di->attributes[i]);
}
}
else di->attributes = NULL;
if (abbrev->have_child)
{
vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
while (traverse->data < traverse->end_data)
{
if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
if (!child) break;
where = vector_add(&di->children, &ctx->pool);
if (!where) return FALSE;
*where = child;
}
}
if (dwarf2_find_attribute(di, DW_AT_sibling, &sibling) &&
traverse->data != traverse->sections[traverse->section].address + sibling.uvalue)
{
WARN("setting cursor for %s to next sibling <0x%lx>\n",
dwarf2_debug_traverse_ctx(traverse), sibling.uvalue);
traverse->data = traverse->sections[traverse->section].address + sibling.uvalue;
}
*pdi = di;
return TRUE;
}
static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
union attribute name;
union attribute size;
union attribute encoding;
enum BasicType bt;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
dwarf2_find_name(ctx, di, &name, "base_type");
if (!dwarf2_find_attribute(di, DW_AT_byte_size, &size)) size.uvalue = 0;
if (!dwarf2_find_attribute(di, DW_AT_encoding, &encoding)) encoding.uvalue = DW_ATE_void;
switch (encoding.uvalue)
{
case DW_ATE_void: bt = btVoid; break;
case DW_ATE_address: bt = btULong; break;
case DW_ATE_boolean: bt = btBool; break;
case DW_ATE_complex_float: bt = btComplex; break;
case DW_ATE_float: bt = btFloat; break;
case DW_ATE_signed: bt = btInt; break;
case DW_ATE_unsigned: bt = btUInt; break;
case DW_ATE_signed_char: bt = btChar; break;
case DW_ATE_unsigned_char: bt = btChar; break;
default: bt = btNoType; break;
}
di->symt = &symt_new_basic(ctx->module, bt, name.string, size.uvalue)->symt;
if (di->abbrev->have_child) FIXME("Unsupported children\n");
return di->symt;
}
static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
struct symt* ref_type;
union attribute name;
if (di->symt) return di->symt;
TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
dwarf2_find_name(ctx, di, &name, "typedef");
ref_type = dwarf2_lookup_type(ctx, di);
if (name.string)
{
di->symt = &symt_new_typedef(ctx->module, ref_type, name.string)->symt;
}
if (di->abbrev->have_child) FIXME("Unsupported children\n");
return di->symt;
}
static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
struct symt* ref_type;
union attribute size;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
if (!dwarf2_find_attribute(di, DW_AT_byte_size, &size)) size.uvalue = 0;
ref_type = dwarf2_lookup_type(ctx, di);
di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
if (di->abbrev->have_child) FIXME("Unsupported children\n");
return di->symt;
}
static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
struct symt* ref_type;
struct symt* idx_type = NULL;
union attribute min, max, cnt;
dwarf2_debug_info_t** pchild = NULL;
dwarf2_debug_info_t* child;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
if (!di->abbrev->have_child)
{
FIXME("array without range information\n");
return NULL;
}
ref_type = dwarf2_lookup_type(ctx, di);
while ((pchild = vector_iter_up(&di->children, pchild)))
{
child = *pchild;
switch (child->abbrev->tag)
{
case DW_TAG_subrange_type:
idx_type = dwarf2_lookup_type(ctx, child);
if (!dwarf2_find_attribute(child, DW_AT_lower_bound, &min))
min.uvalue = 0;
if (!dwarf2_find_attribute(child, DW_AT_upper_bound, &max))
max.uvalue = 0;
if (dwarf2_find_attribute(child, DW_AT_count, &cnt))
max.uvalue = min.uvalue + cnt.uvalue;
break;
default:
FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
break;
}
}
di->symt = &symt_new_array(ctx->module, min.uvalue, max.uvalue, ref_type, idx_type)->symt;
return di->symt;
}
static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
struct symt* ref_type;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
ref_type = dwarf2_lookup_type(ctx, di);
if (di->abbrev->have_child) FIXME("Unsupported children\n");
di->symt = ref_type;
return ref_type;
}
static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
struct symt* ref_type = NULL;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
ref_type = dwarf2_lookup_type(ctx, di);
/* FIXME: for now, we hard-wire C++ references to pointers */
di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
if (di->abbrev->have_child) FIXME("Unsupported children\n");
return di->symt;
}
static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di,
struct symt_udt* parent)
{
struct symt* elt_type;
union attribute name;
union attribute loc;
unsigned long offset = 0;
union attribute bit_size;
union attribute bit_offset;
assert(parent);
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
dwarf2_find_name(ctx, di, &name, "udt_member");
elt_type = dwarf2_lookup_type(ctx, di);
if (dwarf2_find_attribute(di, DW_AT_data_member_location, &loc))
{
TRACE("found member_location at %s\n", dwarf2_debug_ctx(ctx));
offset = dwarf2_compute_location(ctx, loc.block, NULL);
TRACE("found offset:%lu\n", offset);
}
if (!dwarf2_find_attribute(di, DW_AT_bit_size, &bit_size)) bit_size.uvalue = 0;
if (dwarf2_find_attribute(di, DW_AT_bit_offset, &bit_offset))
{
/* FIXME: we should only do this when implementation is LSB (which is
* the case on i386 processors)
*/
union attribute nbytes;
if (!dwarf2_find_attribute(di, DW_AT_byte_size, &nbytes))
{
DWORD64 size;
nbytes.uvalue = symt_get_info(elt_type, TI_GET_LENGTH, &size) ? (unsigned long)size : 0;
}
bit_offset.uvalue = nbytes.uvalue * 8 - bit_offset.uvalue - bit_size.uvalue;
}
else bit_offset.uvalue = 0;
symt_add_udt_element(ctx->module, parent, name.string, elt_type,
(offset << 3) + bit_offset.uvalue, bit_size.uvalue);
if (di->abbrev->have_child) FIXME("Unsupported children\n");
}
static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di,
enum UdtKind udt)
{
union attribute name;
union attribute size;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
dwarf2_find_name(ctx, di, &name, "udt");
if (!dwarf2_find_attribute(di, DW_AT_byte_size, &size)) size.uvalue = 0;
di->symt = &symt_new_udt(ctx->module, name.string, size.uvalue, udt)->symt;
if (di->abbrev->have_child) /** any interest to not have child ? */
{
dwarf2_debug_info_t** pchild = NULL;
dwarf2_debug_info_t* child;
while ((pchild = vector_iter_up(&di->children, pchild)))
{
child = *pchild;
switch (child->abbrev->tag)
{
case DW_TAG_member:
/* FIXME: should I follow the sibling stuff ?? */
dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
break;
case DW_TAG_enumeration_type:
dwarf2_parse_enumeration_type(ctx, child);
break;
case DW_TAG_structure_type:
case DW_TAG_class_type:
case DW_TAG_union_type:
/* FIXME: we need to handle nested udt definitions */
break;
default:
FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
break;
}
}
}
return di->symt;
}
static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di,
struct symt_enum* parent)
{
union attribute name;
union attribute value;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
dwarf2_find_name(ctx, di, &name, "enum_value");
if (!dwarf2_find_attribute(di, DW_AT_const_value, &value)) value.svalue = 0;
symt_add_enum_element(ctx->module, parent, name.string, value.svalue);
if (di->abbrev->have_child) FIXME("Unsupported children\n");
}
static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di)
{
union attribute name;
union attribute size;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
dwarf2_find_name(ctx, di, &name, "enum");
if (!dwarf2_find_attribute(di, DW_AT_byte_size, &size)) size.uvalue = 0;
di->symt = &symt_new_enum(ctx->module, name.string)->symt;
if (di->abbrev->have_child) /* any interest to not have child ? */
{
dwarf2_debug_info_t** pchild = NULL;
dwarf2_debug_info_t* child;
/* FIXME: should we use the sibling stuff ?? */
while ((pchild = vector_iter_up(&di->children, pchild)))
{
child = *pchild;
switch (child->abbrev->tag)
{
case DW_TAG_enumerator:
dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
break;
default:
FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
}
}
}
return di->symt;
}
static unsigned dwarf2_map_register(int regno)
{
unsigned reg;
switch (regno)
{
case Wine_DW_no_register: FIXME("What the heck\n"); reg = 0; break;
/* FIXME: this is a dirty hack */
case Wine_DW_frame_register: reg = 0; break;
case 0: reg = CV_REG_EAX; break;
case 1: reg = CV_REG_ECX; break;
case 2: reg = CV_REG_EDX; break;
case 3: reg = CV_REG_EBX; break;
case 4: reg = CV_REG_ESP; break;
case 5: reg = CV_REG_EBP; break;
case 6: reg = CV_REG_ESI; break;
case 7: reg = CV_REG_EDI; break;
case 8: reg = CV_REG_EIP; break;
case 9: reg = CV_REG_EFLAGS; break;
case 10: reg = CV_REG_CS; break;
case 11: reg = CV_REG_SS; break;
case 12: reg = CV_REG_DS; break;
case 13: reg = CV_REG_ES; break;
case 14: reg = CV_REG_FS; break;
case 15: reg = CV_REG_GS; break;
case 16: case 17: case 18: case 19:
case 20: case 21: case 22: case 23:
reg = CV_REG_ST0 + regno - 16; break;
case 24: reg = CV_REG_CTRL; break;
case 25: reg = CV_REG_STAT; break;
case 26: reg = CV_REG_TAG; break;
/*
reg: fiseg 27
reg: fioff 28
reg: foseg 29
reg: fooff 30
reg: fop 31
*/
case 32: case 33: case 34: case 35:
case 36: case 37: case 38: case 39:
reg = CV_REG_XMM0 + regno - 32; break;
case 40: reg = CV_REG_MXCSR; break;
default:
FIXME("Don't know how to map register %d\n", regno);
return 0;
}
return reg;
}
/* structure used to pass information around when parsing a subprogram */
typedef struct dwarf2_subprogram_s
{
dwarf2_parse_context_t* ctx;
struct symt_compiland* compiland;
struct symt_function* func;
long frame_offset;
int frame_reg;
} dwarf2_subprogram_t;
/******************************************************************
* dwarf2_parse_variable
*
* Parses any variable (parameter, local/global variable)
*/
static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
struct symt_block* block,
dwarf2_debug_info_t* di)
{
struct symt* param_type;
union attribute name, loc, value;
BOOL is_pmt = di->abbrev->tag == DW_TAG_formal_parameter;
TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
param_type = dwarf2_lookup_type(subpgm->ctx, di);
dwarf2_find_name(subpgm->ctx, di, &name, "parameter");
if (dwarf2_find_attribute(di, DW_AT_location, &loc) && loc.block)
{
union attribute name;
union attribute ext;
long offset;
int in_reg;
offset = dwarf2_compute_location(subpgm->ctx, loc.block, &in_reg);
TRACE("found parameter %s/%ld (reg=%d) at %s\n",
name.string, offset, in_reg, dwarf2_debug_ctx(subpgm->ctx));
switch (in_reg)
{
case Wine_DW_no_register:
/* it's a global variable */
/* FIXME: we don't handle it's scope yet */
if (!dwarf2_find_attribute(di, DW_AT_external, &ext))
ext.uvalue = 0;
symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
name.string, !ext.uvalue,
subpgm->ctx->module->module.BaseOfImage + offset,
0, param_type);
break;
case Wine_DW_frame_register:
in_reg = subpgm->frame_reg;
offset += subpgm->frame_offset;
/* fall through */
default:
/* either a pmt/variable relative to frame pointer or
* pmt/variable in a register
*/
symt_add_func_local(subpgm->ctx->module, subpgm->func,
is_pmt ? DataIsParam : DataIsLocal,
dwarf2_map_register(in_reg), offset,
block, param_type, name.string);
break;
}
}
if (dwarf2_find_attribute(di, DW_AT_const_value, &value))
{
FIXME("NIY (const value %08lx for %s\n", value.uvalue, name.string);
}
if (is_pmt && subpgm->func && subpgm->func->type)
symt_add_function_signature_parameter(subpgm->ctx->module,
(struct symt_function_signature*)subpgm->func->type,
param_type);
if (di->abbrev->have_child) FIXME("Unsupported children\n");
}
static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
dwarf2_debug_info_t* di)
{
union attribute name;
union attribute low_pc;
TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
if (!dwarf2_find_attribute(di, DW_AT_low_pc, &low_pc)) low_pc.uvalue = 0;
dwarf2_find_name(subpgm->ctx, di, &name, "label");
symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
subpgm->ctx->module->module.BaseOfImage + low_pc.uvalue, name.string);
}
static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
struct symt_block* block_parent,
dwarf2_debug_info_t* di);
static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
dwarf2_debug_info_t* di)
{
TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
/* FIXME: attributes to handle:
DW_AT_low_pc:
DW_AT_high_pc:
DW_AT_name:
*/
if (di->abbrev->have_child) /** any interest to not have child ? */
{
dwarf2_debug_info_t** pchild = NULL;
dwarf2_debug_info_t* child;
while ((pchild = vector_iter_up(&di->children, pchild)))
{
child = *pchild;
switch (child->abbrev->tag)
{
case DW_TAG_formal_parameter:
/* FIXME: this is not properly supported yet
* dwarf2_parse_subprogram_parameter(ctx, child, NULL);
*/
break;
case DW_TAG_variable:
/* FIXME:
* dwarf2_parse_variable(ctx, child);
*/
break;
case DW_TAG_lexical_block:
/* FIXME:
dwarf2_parse_subprogram_block(ctx, child, func);
*/
break;
case DW_TAG_inlined_subroutine:
/* FIXME */
dwarf2_parse_inlined_subroutine(subpgm, child);
break;
case DW_TAG_label:
dwarf2_parse_subprogram_label(subpgm, child);
break;
default:
FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
dwarf2_debug_di(di));
}
}
}
}
static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
struct symt_block* parent_block,
dwarf2_debug_info_t* di)
{
struct symt_block* block;
union attribute low_pc;
union attribute high_pc;
TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
if (!dwarf2_find_attribute(di, DW_AT_low_pc, &low_pc)) low_pc.uvalue = 0;
if (!dwarf2_find_attribute(di, DW_AT_high_pc, &high_pc)) high_pc.uvalue = 0;
block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
low_pc.uvalue, high_pc.uvalue - low_pc.uvalue);
if (di->abbrev->have_child) /** any interest to not have child ? */
{
dwarf2_debug_info_t** pchild = NULL;
dwarf2_debug_info_t* child;
while ((pchild = vector_iter_up(&di->children, pchild)))
{
child = *pchild;
switch (child->abbrev->tag)
{
case DW_TAG_inlined_subroutine:
dwarf2_parse_inlined_subroutine(subpgm, child);
break;
case DW_TAG_variable:
dwarf2_parse_variable(subpgm, block, child);
break;
case DW_TAG_lexical_block:
dwarf2_parse_subprogram_block(subpgm, block, child);
break;
case DW_TAG_subprogram:
/* FIXME: likely a declaration (to be checked)
* skip it for now
*/
break;
case DW_TAG_formal_parameter:
/* FIXME: likely elements for exception handling (GCC flavor)
* Skip it for now
*/
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
/* the type referred to will be loaded when we need it, so skip it */
break;
default:
FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
}
}
}
symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
}
static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di,
struct symt_compiland* compiland)
{
union attribute name;
union attribute low_pc;
union attribute high_pc;
union attribute is_decl;
union attribute inline_flags;
union attribute frame;
struct symt* ret_type;
struct symt_function_signature* sig_type;
dwarf2_subprogram_t subpgm;
if (di->symt) return di->symt;
TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
if (!dwarf2_find_attribute(di, DW_AT_low_pc, &low_pc)) low_pc.uvalue = 0;
if (!dwarf2_find_attribute(di, DW_AT_high_pc, &high_pc)) high_pc.uvalue = 0;
/* As functions (defined as inline assembly) get debug info with dwarf
* (not the case for stabs), we just drop Wine's thunks here...
* Actual thunks will be created in elf_module from the symbol table
*/
if (elf_is_in_thunk_area(ctx->module->module.BaseOfImage + low_pc.uvalue,
ctx->thunks) >= 0)
return NULL;
if (!dwarf2_find_attribute(di, DW_AT_declaration, &is_decl)) is_decl.uvalue = 0;
if (!dwarf2_find_attribute(di, DW_AT_inline, &inline_flags)) inline_flags.uvalue = 0;
dwarf2_find_name(ctx, di, &name, "subprogram");
ret_type = dwarf2_lookup_type(ctx, di);
/* FIXME: assuming C source code */
sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
if (!is_decl.uvalue)
{
subpgm.func = symt_new_function(ctx->module, compiland, name.string,
ctx->module->module.BaseOfImage + low_pc.uvalue,
high_pc.uvalue - low_pc.uvalue,
&sig_type->symt);
di->symt = &subpgm.func->symt;
}
else subpgm.func = NULL;
subpgm.ctx = ctx;
subpgm.compiland = compiland;
if (dwarf2_find_attribute(di, DW_AT_frame_base, &frame))
{
subpgm.frame_offset = dwarf2_compute_location(ctx, frame.block, &subpgm.frame_reg);
TRACE("For %s got %ld/%d\n", name.string, subpgm.frame_offset, subpgm.frame_reg);
}
else /* on stack !! */
{
subpgm.frame_reg = 0;
subpgm.frame_offset = 0;
}
if (di->abbrev->have_child) /** any interest to not have child ? */
{
dwarf2_debug_info_t** pchild = NULL;
dwarf2_debug_info_t* child;
while ((pchild = vector_iter_up(&di->children, pchild)))
{
child = *pchild;
switch (child->abbrev->tag)
{
case DW_TAG_variable:
case DW_TAG_formal_parameter:
dwarf2_parse_variable(&subpgm, NULL, child);
break;
case DW_TAG_lexical_block:
dwarf2_parse_subprogram_block(&subpgm, NULL, child);
break;
case DW_TAG_inlined_subroutine:
dwarf2_parse_inlined_subroutine(&subpgm, child);
break;
case DW_TAG_subprogram:
/* FIXME: likely a declaration (to be checked)
* skip it for now
*/
break;
case DW_TAG_label:
dwarf2_parse_subprogram_label(&subpgm, child);
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
case DW_TAG_typedef:
/* the type referred to will be loaded when we need it, so skip it */
break;
case DW_TAG_unspecified_parameters:
/* FIXME: no support in dbghelp's internals so far */
break;
default:
FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
}
}
}
symt_normalize_function(subpgm.ctx->module, subpgm.func);
return di->symt;
}
static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
dwarf2_debug_info_t* di,
struct symt_compiland* compiland)
{
switch (di->abbrev->tag)
{
case DW_TAG_typedef:
dwarf2_parse_typedef(ctx, di);
break;
case DW_TAG_base_type:
dwarf2_parse_base_type(ctx, di);
break;
case DW_TAG_pointer_type:
dwarf2_parse_pointer_type(ctx, di);
break;
case DW_TAG_class_type:
dwarf2_parse_udt_type(ctx, di, UdtClass);
break;
case DW_TAG_structure_type:
dwarf2_parse_udt_type(ctx, di, UdtStruct);
break;
case DW_TAG_union_type:
dwarf2_parse_udt_type(ctx, di, UdtUnion);
break;
case DW_TAG_array_type:
dwarf2_parse_array_type(ctx, di);
break;
case DW_TAG_const_type:
dwarf2_parse_const_type(ctx, di);
break;
case DW_TAG_reference_type:
dwarf2_parse_reference_type(ctx, di);
break;
case DW_TAG_enumeration_type:
dwarf2_parse_enumeration_type(ctx, di);
break;
case DW_TAG_subprogram:
dwarf2_parse_subprogram(ctx, di, compiland);
break;
default:
WARN("Unhandled Tag type 0x%lx at %s, for %lu\n",
di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
}
}
static void dwarf2_set_line_number(struct module* module, unsigned long address,
struct vector* v, unsigned file, unsigned line)
{
struct symt_function* func;
int idx;
unsigned* psrc;
if (!file || !(psrc = vector_at(v, file - 1))) return;
TRACE("%s %lx %s %u\n", module->module.ModuleName, address, source_get(module, *psrc), line);
if ((idx = symt_find_nearest(module, address)) == -1 ||
module->addr_sorttab[idx]->symt.tag != SymTagFunction) return;
func = (struct symt_function*)module->addr_sorttab[idx];
symt_add_func_line(module, func, *psrc, line, address - func->address);
}
static void dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
dwarf2_parse_context_t* ctx,
unsigned long offset)
{
dwarf2_traverse_context_t traverse;
unsigned long length;
unsigned version, header_len, insn_size, default_stmt;
unsigned line_range, opcode_base;
int line_base;
const unsigned char* opcode_len;
struct vector dirs;
struct vector files;
const char** p;
traverse.sections = sections;
traverse.section = section_line;
traverse.data = sections[section_line].address + offset;
traverse.start_data = traverse.data;
traverse.end_data = traverse.data + 4;
traverse.offset = offset;
traverse.word_size = ctx->word_size;
length = dwarf2_parse_u4(&traverse);
traverse.end_data = traverse.start_data + length;
version = dwarf2_parse_u2(&traverse);
header_len = dwarf2_parse_u4(&traverse);
insn_size = dwarf2_parse_byte(&traverse);
default_stmt = dwarf2_parse_byte(&traverse);
line_base = (signed char)dwarf2_parse_byte(&traverse);
line_range = dwarf2_parse_byte(&traverse);
opcode_base = dwarf2_parse_byte(&traverse);
opcode_len = traverse.data;
traverse.data += opcode_base - 1;
vector_init(&dirs, sizeof(const char*), 4);
p = vector_add(&dirs, &ctx->pool);
*p = ".";
while (*traverse.data)
{
TRACE("Got include %s\n", (const char*)traverse.data);
p = vector_add(&dirs, &ctx->pool);
*p = (const char *)traverse.data;
traverse.data += strlen((const char *)traverse.data) + 1;
}
traverse.data++;
vector_init(&files, sizeof(unsigned), 16);
while (*traverse.data)
{
unsigned int dir_index, mod_time, length;
const char* name;
const char* dir;
unsigned* psrc;
name = (const char*)traverse.data;
traverse.data += strlen(name) + 1;
dir_index = dwarf2_leb128_as_unsigned(&traverse);
mod_time = dwarf2_leb128_as_unsigned(&traverse);
length = dwarf2_leb128_as_unsigned(&traverse);
dir = *(const char**)vector_at(&dirs, dir_index);
TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
psrc = vector_add(&files, &ctx->pool);
*psrc = source_new(ctx->module, dir, name);
}
traverse.data++;
while (traverse.data < traverse.end_data)
{
unsigned long address = 0;
unsigned file = 1;
unsigned line = 1;
unsigned is_stmt = default_stmt;
BOOL basic_block = FALSE, end_sequence = FALSE;
unsigned opcode, extopcode, i;
while (!end_sequence)
{
opcode = dwarf2_parse_byte(&traverse);
TRACE("Got opcode %x\n", opcode);
if (opcode >= opcode_base)
{
unsigned delta = opcode - opcode_base;
address += (delta / line_range) * insn_size;
line += line_base + (delta % line_range);
basic_block = TRUE;
dwarf2_set_line_number(ctx->module, address, &files, file, line);
}
else
{
switch (opcode)
{
case DW_LNS_copy:
basic_block = FALSE;
dwarf2_set_line_number(ctx->module, address, &files, file, line);
break;
case DW_LNS_advance_pc:
address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
break;
case DW_LNS_advance_line:
line += dwarf2_leb128_as_signed(&traverse);
break;
case DW_LNS_set_file:
file = dwarf2_leb128_as_unsigned(&traverse);
break;
case DW_LNS_set_column:
dwarf2_leb128_as_unsigned(&traverse);
break;
case DW_LNS_negate_stmt:
is_stmt = !is_stmt;
break;
case DW_LNS_set_basic_block:
basic_block = 1;
break;
case DW_LNS_const_add_pc:
address += ((255 - opcode_base) / line_range) * insn_size;
break;
case DW_LNS_fixed_advance_pc:
address += dwarf2_parse_u2(&traverse);
break;
case DW_LNS_extended_op:
dwarf2_leb128_as_unsigned(&traverse);
extopcode = dwarf2_parse_byte(&traverse);
switch (extopcode)
{
case DW_LNE_end_sequence:
dwarf2_set_line_number(ctx->module, address, &files, file, line);
end_sequence = TRUE;
break;
case DW_LNE_set_address:
address = ctx->module->module.BaseOfImage + dwarf2_parse_addr(&traverse);
break;
case DW_LNE_define_file:
FIXME("not handled %s\n", traverse.data);
traverse.data += strlen((const char *)traverse.data) + 1;
dwarf2_leb128_as_unsigned(&traverse);
dwarf2_leb128_as_unsigned(&traverse);
dwarf2_leb128_as_unsigned(&traverse);
break;
default:
FIXME("Unsupported extended opcode %x\n", extopcode);
break;
}
break;
default:
WARN("Unsupported opcode %x\n", opcode);
for (i = 0; i < opcode_len[opcode]; i++)
dwarf2_leb128_as_unsigned(&traverse);
break;
}
}
}
}
}
static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
const dwarf2_comp_unit_t* comp_unit,
struct module* module,
const struct elf_thunk_area* thunks,
const unsigned char* comp_unit_cursor)
{
dwarf2_parse_context_t ctx;
dwarf2_traverse_context_t traverse;
dwarf2_traverse_context_t abbrev_ctx;
dwarf2_debug_info_t* di;
BOOL ret = FALSE;
TRACE("Compilation Unit Header found at 0x%x:\n",
comp_unit_cursor - sections[section_debug].address);
TRACE("- length: %lu\n", comp_unit->length);
TRACE("- version: %u\n", comp_unit->version);
TRACE("- abbrev_offset: %lu\n", comp_unit->abbrev_offset);
TRACE("- word_size: %u\n", comp_unit->word_size);
if (comp_unit->version != 2)
{
WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
comp_unit->version);
return FALSE;
}
pool_init(&ctx.pool, 65536);
ctx.module = module;
ctx.word_size = comp_unit->word_size;
ctx.thunks = thunks;
traverse.sections = sections;
traverse.section = section_debug;
traverse.start_data = comp_unit_cursor + sizeof(dwarf2_comp_unit_stream_t);
traverse.data = traverse.start_data;
traverse.offset = comp_unit_cursor - sections[section_debug].address;
traverse.word_size = comp_unit->word_size;
traverse.end_data = comp_unit_cursor + comp_unit->length + sizeof(unsigned);
abbrev_ctx.sections = sections;
abbrev_ctx.section = section_abbrev;
abbrev_ctx.start_data = sections[section_abbrev].address + comp_unit->abbrev_offset;
abbrev_ctx.data = abbrev_ctx.start_data;
abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
abbrev_ctx.offset = comp_unit->abbrev_offset;
abbrev_ctx.word_size = comp_unit->word_size;
dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
dwarf2_read_one_debug_info(&ctx, &traverse, &di);
if (di->abbrev->tag == DW_TAG_compile_unit)
{
union attribute name;
dwarf2_debug_info_t** pdi = NULL;
union attribute stmt_list;
TRACE("beginning at 0x%lx, for %lu\n", di->offset, di->abbrev->entry_code);
dwarf2_find_name(&ctx, di, &name, "compiland");
di->symt = &symt_new_compiland(module, source_new(module, NULL, name.string))->symt;
if (di->abbrev->have_child)
{
while ((pdi = vector_iter_up(&di->children, pdi)))
{
dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
}
}
if (dwarf2_find_attribute(di, DW_AT_stmt_list, &stmt_list))
{
dwarf2_parse_line_numbers(sections, &ctx, stmt_list.uvalue);
}
ret = TRUE;
}
else FIXME("Should have a compilation unit here\n");
pool_destroy(&ctx.pool);
return ret;
}
BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
const struct elf_thunk_area* thunks,
const unsigned char* debug, unsigned int debug_size,
const unsigned char* abbrev, unsigned int abbrev_size,
const unsigned char* str, unsigned int str_size,
const unsigned char* line, unsigned int line_size)
{
dwarf2_section_t section[section_max];
const unsigned char*comp_unit_cursor = debug;
const unsigned char*end_debug = debug + debug_size;
section[section_debug].address = debug;
section[section_debug].size = debug_size;
section[section_abbrev].address = abbrev;
section[section_abbrev].size = abbrev_size;
section[section_string].address = str;
section[section_string].size = str_size;
section[section_line].address = line;
section[section_line].size = line_size;
while (comp_unit_cursor < end_debug)
{
const dwarf2_comp_unit_stream_t* comp_unit_stream;
dwarf2_comp_unit_t comp_unit;
comp_unit_stream = (const dwarf2_comp_unit_stream_t*) comp_unit_cursor;
comp_unit.length = *(unsigned long*) comp_unit_stream->length;
comp_unit.version = *(unsigned short*) comp_unit_stream->version;
comp_unit.abbrev_offset = *(unsigned long*) comp_unit_stream->abbrev_offset;
comp_unit.word_size = *(unsigned char*) comp_unit_stream->word_size;
dwarf2_parse_compilation_unit(section, &comp_unit, module,
thunks, comp_unit_cursor);
comp_unit_cursor += comp_unit.length + sizeof(unsigned);
}
module->module.SymType = SymDia;
module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
/* FIXME: we could have a finer grain here */
module->module.LineNumbers = TRUE;
module->module.GlobalSymbols = TRUE;
module->module.TypeInfo = TRUE;
module->module.SourceIndexed = TRUE;
module->module.Publics = TRUE;
return TRUE;
}
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