| /* |
| * 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 |
| */ |
| |
| #define NONAMELESSUNION |
| |
| #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 "winuser.h" |
| #include "ole2.h" |
| #include "oleauto.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; |
| }; |
| |
| struct attribute |
| { |
| unsigned long form; |
| union |
| { |
| unsigned long uvalue; |
| long svalue; |
| const char* string; |
| struct dwarf2_block block; |
| } u; |
| }; |
| |
| typedef struct dwarf2_debug_info_s |
| { |
| const dwarf2_abbrev_entry_t*abbrev; |
| struct symt* symt; |
| const unsigned char** data; |
| 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 unsigned char* data; |
| const unsigned char* start_data; |
| const unsigned char* end_data; |
| unsigned char word_size; |
| } dwarf2_traverse_context_t; |
| |
| /* symt_cache indexes */ |
| #define sc_void 0 |
| #define sc_int1 1 |
| #define sc_int2 2 |
| #define sc_int4 3 |
| #define sc_num 4 |
| |
| typedef struct dwarf2_parse_context_s |
| { |
| const dwarf2_section_t* sections; |
| unsigned section; |
| struct pool pool; |
| struct module* module; |
| const struct elf_thunk_area*thunks; |
| struct sparse_array abbrev_table; |
| struct sparse_array debug_info_table; |
| unsigned long load_offset; |
| unsigned long ref_offset; |
| unsigned char word_size; |
| struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */ |
| } dwarf2_parse_context_t; |
| |
| /* stored in the dbghelp's module internal structure for later reuse */ |
| struct dwarf2_module_info_s |
| { |
| dwarf2_section_t debug_loc; |
| }; |
| |
| #define loc_dwarf2_location_list (loc_user + 0) |
| #define loc_dwarf2_block (loc_user + 1) |
| |
| /* forward declarations */ |
| static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry); |
| |
| static unsigned char dwarf2_get_byte(const unsigned char* ptr) |
| { |
| return *ptr; |
| } |
| |
| static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx) |
| { |
| unsigned char uvalue = dwarf2_get_byte(ctx->data); |
| ctx->data += 1; |
| return uvalue; |
| } |
| |
| static unsigned short dwarf2_get_u2(const unsigned char* ptr) |
| { |
| return *(const unsigned short*)ptr; |
| } |
| |
| static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx) |
| { |
| unsigned short uvalue = dwarf2_get_u2(ctx->data); |
| ctx->data += 2; |
| return uvalue; |
| } |
| |
| static unsigned long dwarf2_get_u4(const unsigned char* ptr) |
| { |
| return *(const unsigned long*)ptr; |
| } |
| |
| static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx) |
| { |
| unsigned long uvalue = dwarf2_get_u4(ctx->data); |
| ctx->data += 4; |
| return uvalue; |
| } |
| |
| static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end) |
| { |
| unsigned long ret = 0; |
| unsigned char byte; |
| unsigned shift = 0; |
| |
| do |
| { |
| byte = dwarf2_get_byte(ptr++); |
| ret |= (byte & 0x7f) << shift; |
| shift += 7; |
| } while (byte & 0x80); |
| |
| if (end) *end = ptr; |
| return ret; |
| } |
| |
| static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx) |
| { |
| unsigned long ret; |
| |
| assert(ctx); |
| |
| ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data); |
| |
| return ret; |
| } |
| |
| static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end) |
| { |
| long ret = 0; |
| unsigned char byte; |
| unsigned shift = 0; |
| const unsigned size = sizeof(int) * 8; |
| |
| do |
| { |
| byte = dwarf2_get_byte(ptr++); |
| ret |= (byte & 0x7f) << shift; |
| shift += 7; |
| } while (byte & 0x80); |
| if (end) *end = ptr; |
| |
| /* 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 long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx) |
| { |
| long ret = 0; |
| |
| assert(ctx); |
| |
| ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data); |
| return ret; |
| } |
| |
| static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx) |
| { |
| unsigned ret; |
| for (ret = 0; ctx->data[ret] & 0x80; ret++); |
| return ret + 1; |
| } |
| |
| static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size) |
| { |
| unsigned long ret; |
| |
| switch (word_size) |
| { |
| case 4: |
| ret = dwarf2_get_u4(ptr); |
| break; |
| default: |
| FIXME("Unsupported Word Size %u\n", word_size); |
| ret = 0; |
| } |
| return ret; |
| } |
| |
| static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx) |
| { |
| unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size); |
| ctx->data += ctx->word_size; |
| return ret; |
| } |
| |
| static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx) |
| { |
| return wine_dbg_sprintf("ctx(%p)", ctx->data); |
| } |
| |
| static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx) |
| { |
| return wine_dbg_sprintf("ctx(%p,%s)", |
| ctx, debugstr_w(ctx->module->module.ModuleName)); |
| } |
| |
| static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di) |
| { |
| return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)", |
| di->abbrev, di->symt); |
| } |
| |
| static dwarf2_abbrev_entry_t* |
| dwarf2_abbrev_table_find_entry(const 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_swallow_attribute(dwarf2_traverse_context_t* ctx, |
| const dwarf2_abbrev_entry_attr_t* abbrev_attr) |
| { |
| unsigned step; |
| |
| 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: step = ctx->word_size; break; |
| case DW_FORM_flag: |
| case DW_FORM_data1: |
| case DW_FORM_ref1: step = 1; break; |
| case DW_FORM_data2: |
| case DW_FORM_ref2: step = 2; break; |
| case DW_FORM_data4: |
| case DW_FORM_ref4: |
| case DW_FORM_strp: step = 4; break; |
| case DW_FORM_data8: |
| case DW_FORM_ref8: step = 8; break; |
| case DW_FORM_sdata: |
| case DW_FORM_ref_udata: |
| case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break; |
| case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break; |
| case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break; |
| case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break; |
| case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break; |
| case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break; |
| default: |
| FIXME("Unhandled attribute form %lx\n", abbrev_attr->form); |
| return; |
| } |
| ctx->data += step; |
| } |
| |
| static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx, |
| const dwarf2_abbrev_entry_attr_t* abbrev_attr, |
| const unsigned char* data, |
| struct attribute* attr) |
| { |
| attr->form = abbrev_attr->form; |
| switch (attr->form) |
| { |
| case DW_FORM_ref_addr: |
| case DW_FORM_addr: |
| attr->u.uvalue = dwarf2_get_addr(data, ctx->word_size); |
| TRACE("addr<0x%lx>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_flag: |
| attr->u.uvalue = dwarf2_get_byte(data); |
| TRACE("flag<0x%lx>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_data1: |
| attr->u.uvalue = dwarf2_get_byte(data); |
| TRACE("data1<%lu>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_data2: |
| attr->u.uvalue = dwarf2_get_u2(data); |
| TRACE("data2<%lu>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_data4: |
| attr->u.uvalue = dwarf2_get_u4(data); |
| TRACE("data4<%lu>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_data8: |
| FIXME("Unhandled 64bits support\n"); |
| break; |
| |
| case DW_FORM_ref1: |
| attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data); |
| TRACE("ref1<0x%lx>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_ref2: |
| attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data); |
| TRACE("ref2<0x%lx>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_ref4: |
| attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data); |
| TRACE("ref4<0x%lx>\n", attr->u.uvalue); |
| break; |
| |
| case DW_FORM_ref8: |
| FIXME("Unhandled 64 bit support\n"); |
| break; |
| |
| case DW_FORM_sdata: |
| attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL); |
| break; |
| |
| case DW_FORM_ref_udata: |
| attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL); |
| break; |
| |
| case DW_FORM_udata: |
| attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL); |
| break; |
| |
| case DW_FORM_string: |
| attr->u.string = (const char *)data; |
| TRACE("string<%s>\n", attr->u.string); |
| break; |
| |
| case DW_FORM_strp: |
| { |
| unsigned long offset = dwarf2_get_u4(data); |
| attr->u.string = (const char*)ctx->sections[section_string].address + offset; |
| } |
| TRACE("strp<%s>\n", attr->u.string); |
| break; |
| |
| case DW_FORM_block: |
| attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr); |
| break; |
| |
| case DW_FORM_block1: |
| attr->u.block.size = dwarf2_get_byte(data); |
| attr->u.block.ptr = data + 1; |
| break; |
| |
| case DW_FORM_block2: |
| attr->u.block.size = dwarf2_get_u2(data); |
| attr->u.block.ptr = data + 2; |
| break; |
| |
| case DW_FORM_block4: |
| attr->u.block.size = dwarf2_get_u4(data); |
| attr->u.block.ptr = data + 4; |
| break; |
| |
| default: |
| FIXME("Unhandled attribute form %lx\n", abbrev_attr->form); |
| break; |
| } |
| } |
| |
| static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx, |
| const dwarf2_debug_info_t* di, |
| unsigned at, struct attribute* attr) |
| { |
| unsigned i, ai = 0; |
| dwarf2_abbrev_entry_attr_t* abbrev_attr; |
| dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr; |
| |
| while (di) |
| { |
| abstract_abbrev_attr = NULL; |
| for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next) |
| { |
| if (abbrev_attr->attribute == at) |
| { |
| dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr); |
| return TRUE; |
| } |
| if (abbrev_attr->attribute == DW_AT_abstract_origin && |
| at != DW_AT_sibling) |
| { |
| abstract_abbrev_attr = abbrev_attr; |
| ai = i; |
| } |
| } |
| /* do we have an abstract origin debug entry to look into ? */ |
| if (!abstract_abbrev_attr) break; |
| dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr); |
| if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue))) |
| FIXME("Should have found the debug info entry\n"); |
| } |
| return FALSE; |
| } |
| |
| static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*, |
| struct symt_compiland*); |
| |
| #define Wine_DW_no_register 0x7FFFFFFF |
| |
| static unsigned dwarf2_map_register(int regno) |
| { |
| unsigned reg; |
| |
| switch (regno) |
| { |
| case Wine_DW_no_register: FIXME("What the heck map reg 0x%x\n",regno); 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; |
| } |
| |
| static enum location_error |
| compute_location(dwarf2_traverse_context_t* ctx, struct location* loc, |
| HANDLE hproc, const struct location* frame) |
| { |
| unsigned long stack[64]; |
| unsigned stk; |
| unsigned char op; |
| BOOL piece_found = FALSE; |
| |
| stack[stk = 0] = 0; |
| |
| loc->kind = loc_absolute; |
| loc->reg = Wine_DW_no_register; |
| |
| while (ctx->data < ctx->end_data) |
| { |
| op = dwarf2_parse_byte(ctx); |
| switch (op) |
| { |
| case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break; |
| case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break; |
| case DW_OP_const1s: stack[++stk] = (long)(signed char)dwarf2_parse_byte(ctx); break; |
| case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break; |
| case DW_OP_const2s: stack[++stk] = (long)(short)dwarf2_parse_u2(ctx); break; |
| case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break; |
| case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break; |
| case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break; |
| case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break; |
| case DW_OP_plus_uconst: |
| stack[stk] += dwarf2_leb128_as_unsigned(ctx); 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: |
| /* 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) |
| { |
| if (loc->reg != Wine_DW_no_register) |
| FIXME("Only supporting one reg (%d -> %d)\n", |
| loc->reg, dwarf2_map_register(op - DW_OP_reg0)); |
| loc->reg = dwarf2_map_register(op - DW_OP_reg0); |
| } |
| loc->kind = loc_register; |
| break; |
| case DW_OP_breg0: case DW_OP_breg1: case DW_OP_breg2: case DW_OP_breg3: |
| case DW_OP_breg4: case DW_OP_breg5: case DW_OP_breg6: case DW_OP_breg7: |
| case DW_OP_breg8: case DW_OP_breg9: case DW_OP_breg10: case DW_OP_breg11: |
| case DW_OP_breg12: case DW_OP_breg13: case DW_OP_breg14: case DW_OP_breg15: |
| case DW_OP_breg16: case DW_OP_breg17: case DW_OP_breg18: case DW_OP_breg19: |
| case DW_OP_breg20: case DW_OP_breg21: case DW_OP_breg22: case DW_OP_breg23: |
| case DW_OP_breg24: case DW_OP_breg25: case DW_OP_breg26: case DW_OP_breg27: |
| case DW_OP_breg28: case DW_OP_breg29: case DW_OP_breg30: case DW_OP_breg31: |
| /* 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) |
| { |
| if (loc->reg != Wine_DW_no_register) |
| FIXME("Only supporting one reg (%d -> %d)\n", |
| loc->reg, dwarf2_map_register(op - DW_OP_breg0)); |
| loc->reg = dwarf2_map_register(op - DW_OP_breg0); |
| } |
| stack[++stk] = dwarf2_leb128_as_signed(ctx); |
| loc->kind = loc_regrel; |
| break; |
| case DW_OP_fbreg: |
| if (loc->reg != Wine_DW_no_register) |
| FIXME("Only supporting one reg (%d -> -2)\n", loc->reg); |
| if (frame && frame->kind == loc_register) |
| { |
| loc->kind = loc_regrel; |
| loc->reg = frame->reg; |
| stack[++stk] = dwarf2_leb128_as_signed(ctx); |
| } |
| else if (frame && frame->kind == loc_regrel) |
| { |
| loc->kind = loc_regrel; |
| loc->reg = frame->reg; |
| stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset; |
| } |
| else |
| { |
| /* FIXME: this could be later optimized by not recomputing |
| * this very location expression |
| */ |
| loc->kind = loc_dwarf2_block; |
| stack[++stk] = dwarf2_leb128_as_signed(ctx); |
| } |
| break; |
| case DW_OP_piece: |
| { |
| unsigned sz = dwarf2_leb128_as_unsigned(ctx); |
| WARN("Not handling OP_piece (size=%d)\n", sz); |
| piece_found = TRUE; |
| } |
| break; |
| case DW_OP_deref: |
| if (!stk) |
| { |
| FIXME("Unexpected empty stack\n"); |
| return loc_err_internal; |
| } |
| if (loc->reg != Wine_DW_no_register) |
| { |
| WARN("Too complex expression for deref\n"); |
| return loc_err_too_complex; |
| } |
| if (hproc) |
| { |
| DWORD addr = stack[stk--]; |
| DWORD deref; |
| |
| if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL)) |
| { |
| WARN("Couldn't read memory at %x\n", addr); |
| return loc_err_cant_read; |
| } |
| stack[++stk] = deref; |
| } |
| else |
| { |
| loc->kind = loc_dwarf2_block; |
| } |
| break; |
| default: |
| FIXME("Unhandled attr op: %x\n", op); |
| return loc_err_internal; |
| } |
| } |
| loc->offset = stack[stk]; |
| return 0; |
| } |
| |
| static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx, |
| const dwarf2_debug_info_t* di, |
| unsigned long dw, |
| struct location* loc, |
| const struct location* frame) |
| { |
| struct attribute xloc; |
| |
| if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE; |
| |
| switch (xloc.form) |
| { |
| case DW_FORM_data1: case DW_FORM_data2: |
| case DW_FORM_udata: case DW_FORM_sdata: |
| loc->kind = loc_absolute; |
| loc->reg = 0; |
| loc->offset = xloc.u.uvalue; |
| return TRUE; |
| case DW_FORM_data4: case DW_FORM_data8: |
| loc->kind = loc_dwarf2_location_list; |
| loc->reg = Wine_DW_no_register; |
| loc->offset = xloc.u.uvalue; |
| return TRUE; |
| } |
| |
| /* assume we have a block form */ |
| |
| if (xloc.u.block.size) |
| { |
| dwarf2_traverse_context_t lctx; |
| enum location_error err; |
| |
| lctx.data = xloc.u.block.ptr; |
| lctx.end_data = xloc.u.block.ptr + xloc.u.block.size; |
| lctx.word_size = ctx->word_size; |
| |
| err = compute_location(&lctx, loc, NULL, frame); |
| if (err < 0) |
| { |
| loc->kind = loc_error; |
| loc->reg = err; |
| } |
| else if (loc->kind == loc_dwarf2_block) |
| { |
| unsigned* ptr = pool_alloc(&ctx->module->pool, |
| sizeof(unsigned) + xloc.u.block.size); |
| *ptr = xloc.u.block.size; |
| memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size); |
| loc->offset = (unsigned long)ptr; |
| } |
| } |
| return TRUE; |
| } |
| |
| static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx, |
| const dwarf2_debug_info_t* di) |
| { |
| struct attribute attr; |
| |
| if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr)) |
| { |
| dwarf2_debug_info_t* type; |
| |
| type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue); |
| if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.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; |
| struct attribute sibling; |
| |
| offset = traverse->data - ctx->sections[ctx->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->abbrev = abbrev; |
| di->symt = NULL; |
| |
| if (abbrev->num_attr) |
| { |
| di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*)); |
| for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next) |
| { |
| di->data[i] = traverse->data; |
| dwarf2_swallow_attribute(traverse, attr); |
| } |
| } |
| else di->data = 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(ctx, di, DW_AT_sibling, &sibling) && |
| traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue) |
| { |
| WARN("setting cursor for %s to next sibling <0x%lx>\n", |
| dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue); |
| traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue; |
| } |
| *pdi = di; |
| return TRUE; |
| } |
| |
| static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx, |
| dwarf2_debug_info_t* di) |
| { |
| struct attribute name; |
| struct attribute size; |
| struct attribute encoding; |
| enum BasicType bt; |
| int cache_idx = -1; |
| if (di->symt) return di->symt; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) |
| name.u.string = NULL; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void; |
| |
| switch (encoding.u.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.u.string, size.u.uvalue)->symt; |
| switch (bt) |
| { |
| case btVoid: |
| assert(size.u.uvalue == 0); |
| cache_idx = sc_void; |
| break; |
| case btInt: |
| switch (size.u.uvalue) |
| { |
| case 1: cache_idx = sc_int1; break; |
| case 2: cache_idx = sc_int2; break; |
| case 4: cache_idx = sc_int4; break; |
| } |
| break; |
| default: break; |
| } |
| if (cache_idx != -1 && !ctx->symt_cache[cache_idx]) |
| ctx->symt_cache[cache_idx] = di->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; |
| struct attribute name; |
| |
| if (di->symt) return di->symt; |
| |
| TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code); |
| |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; |
| ref_type = dwarf2_lookup_type(ctx, di); |
| |
| if (name.u.string) |
| di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.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; |
| struct 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(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; |
| if (!(ref_type = dwarf2_lookup_type(ctx, di))) |
| { |
| ref_type = ctx->symt_cache[sc_void]; |
| assert(ref_type); |
| } |
| 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; |
| struct attribute min, max, cnt; |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| 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); |
| |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| switch (child->abbrev->tag) |
| { |
| case DW_TAG_subrange_type: |
| idx_type = dwarf2_lookup_type(ctx, child); |
| if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min)) |
| min.u.uvalue = 0; |
| if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max)) |
| max.u.uvalue = 0; |
| if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt)) |
| max.u.uvalue = min.u.uvalue + cnt.u.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.u.uvalue, max.u.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_volatile_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, |
| const dwarf2_debug_info_t* di, |
| struct symt_udt* parent) |
| { |
| struct symt* elt_type; |
| struct attribute name; |
| struct attribute bit_size; |
| struct attribute bit_offset; |
| struct location loc; |
| |
| assert(parent); |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; |
| elt_type = dwarf2_lookup_type(ctx, di); |
| if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL)) |
| { |
| if (loc.kind != loc_absolute) |
| { |
| FIXME("Found register, while not expecting it\n"); |
| loc.offset = 0; |
| } |
| else |
| TRACE("found member_location at %s -> %lu\n", |
| dwarf2_debug_ctx(ctx), loc.offset); |
| } |
| else |
| loc.offset = 0; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size)) |
| bit_size.u.uvalue = 0; |
| if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset)) |
| { |
| /* FIXME: we should only do this when implementation is LSB (which is |
| * the case on i386 processors) |
| */ |
| struct attribute nbytes; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes)) |
| { |
| DWORD64 size; |
| nbytes.u.uvalue = symt_get_info(elt_type, TI_GET_LENGTH, &size) ? (unsigned long)size : 0; |
| } |
| bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue; |
| } |
| else bit_offset.u.uvalue = 0; |
| symt_add_udt_element(ctx->module, parent, name.u.string, elt_type, |
| (loc.offset << 3) + bit_offset.u.uvalue, |
| bit_size.u.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) |
| { |
| struct attribute name; |
| struct 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(ctx, di, DW_AT_name, &name)) name.u.string = NULL; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; |
| |
| di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt; |
| |
| if (di->abbrev->have_child) /** any interest to not have child ? */ |
| { |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| |
| 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: |
| case DW_TAG_typedef: |
| /* 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, |
| const dwarf2_debug_info_t* di, |
| struct symt_enum* parent) |
| { |
| struct attribute name; |
| struct attribute value; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0; |
| symt_add_enum_element(ctx->module, parent, name.u.string, value.u.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) |
| { |
| struct attribute name; |
| struct attribute size; |
| struct symt_basic* basetype; |
| |
| if (di->symt) return di->symt; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4; |
| |
| switch (size.u.uvalue) /* FIXME: that's wrong */ |
| { |
| case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break; |
| case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break; |
| default: |
| case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break; |
| } |
| |
| di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt; |
| |
| if (di->abbrev->have_child) /* any interest to not have child ? */ |
| { |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| /* FIXME: should we use the sibling stuff ?? */ |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| |
| 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; |
| } |
| |
| /* 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; |
| BOOL non_computed_variable; |
| struct location frame; |
| } 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; |
| struct attribute name, value; |
| struct location loc; |
| BOOL is_pmt; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); |
| |
| is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter; |
| param_type = dwarf2_lookup_type(subpgm->ctx, di); |
| |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) { |
| /* cannot do much without the name, the functions below won't like it. */ |
| return; |
| } |
| if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location, |
| &loc, &subpgm->frame)) |
| { |
| struct attribute ext; |
| |
| TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n", |
| name.u.string, loc.kind, loc.offset, loc.reg, |
| dwarf2_debug_ctx(subpgm->ctx)); |
| |
| switch (loc.kind) |
| { |
| case loc_absolute: |
| /* it's a global variable */ |
| /* FIXME: we don't handle its scope yet */ |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext)) |
| ext.u.uvalue = 0; |
| symt_new_global_variable(subpgm->ctx->module, subpgm->compiland, |
| name.u.string, !ext.u.uvalue, |
| subpgm->ctx->load_offset + loc.offset, |
| 0, param_type); |
| break; |
| default: |
| subpgm->non_computed_variable = TRUE; |
| /* fall through */ |
| case loc_register: |
| case loc_regrel: |
| /* either a pmt/variable relative to frame pointer or |
| * pmt/variable in a register |
| */ |
| assert(subpgm->func); |
| symt_add_func_local(subpgm->ctx->module, subpgm->func, |
| is_pmt ? DataIsParam : DataIsLocal, |
| &loc, block, param_type, name.u.string); |
| break; |
| } |
| } |
| else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value)) |
| { |
| VARIANT v; |
| if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string); |
| if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string); |
| switch (value.form) |
| { |
| case DW_FORM_data1: |
| case DW_FORM_data2: |
| case DW_FORM_data4: |
| case DW_FORM_udata: |
| case DW_FORM_addr: |
| v.n1.n2.vt = VT_UI4; |
| v.n1.n2.n3.lVal = value.u.uvalue; |
| break; |
| |
| case DW_FORM_sdata: |
| v.n1.n2.vt = VT_I4; |
| v.n1.n2.n3.lVal = value.u.svalue; |
| break; |
| |
| case DW_FORM_strp: |
| case DW_FORM_string: |
| /* FIXME: native doesn't report const strings from here !! |
| * however, the value of the string is in the code somewhere |
| */ |
| v.n1.n2.vt = VT_I1 | VT_BYREF; |
| v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string); |
| break; |
| |
| case DW_FORM_data8: |
| case DW_FORM_block: |
| case DW_FORM_block1: |
| case DW_FORM_block2: |
| case DW_FORM_block4: |
| |
| default: |
| FIXME("Unsupported form for const value %s (%lx)\n", |
| name.u.string, value.form); |
| v.n1.n2.vt = VT_EMPTY; |
| } |
| di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland, |
| name.u.string, param_type, &v)->symt; |
| } |
| 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, |
| const dwarf2_debug_info_t* di) |
| { |
| struct attribute name; |
| struct attribute low_pc; |
| struct location loc; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0; |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) |
| name.u.string = NULL; |
| |
| loc.kind = loc_absolute; |
| loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue; |
| symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel, |
| &loc, name.u.string); |
| } |
| |
| static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm, |
| struct symt_block* parent_block, |
| const dwarf2_debug_info_t* di); |
| |
| static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm, |
| struct symt_block* parent_block, |
| const dwarf2_debug_info_t* di) |
| { |
| struct symt_block* block; |
| struct attribute low_pc; |
| struct attribute high_pc; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0; |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0; |
| |
| block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block, |
| subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address, |
| high_pc.u.uvalue - low_pc.u.uvalue); |
| |
| if (di->abbrev->have_child) /** any interest to not have child ? */ |
| { |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| |
| switch (child->abbrev->tag) |
| { |
| case DW_TAG_formal_parameter: |
| 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_inlined_subroutine: |
| dwarf2_parse_inlined_subroutine(subpgm, block, 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)); |
| } |
| } |
| } |
| symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0); |
| } |
| |
| static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm, |
| struct symt_block* parent_block, |
| const dwarf2_debug_info_t* di) |
| { |
| struct symt_block* block; |
| struct attribute low_pc; |
| struct attribute high_pc; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); |
| |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) |
| low_pc.u.uvalue = 0; |
| if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) |
| high_pc.u.uvalue = 0; |
| |
| block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block, |
| subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address, |
| high_pc.u.uvalue - low_pc.u.uvalue); |
| |
| if (di->abbrev->have_child) /** any interest to not have child ? */ |
| { |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| |
| switch (child->abbrev->tag) |
| { |
| case DW_TAG_inlined_subroutine: |
| dwarf2_parse_inlined_subroutine(subpgm, block, 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_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; |
| 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) |
| { |
| struct attribute name; |
| struct attribute low_pc; |
| struct attribute high_pc; |
| struct attribute is_decl; |
| struct attribute inline_flags; |
| 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(ctx, di, DW_AT_name, &name)) |
| { |
| WARN("No name for function... dropping function\n"); |
| return NULL; |
| } |
| /* if it's an abstract representation of an inline function, there should be |
| * a concrete object that we'll handle |
| */ |
| if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags)) |
| { |
| TRACE("Function %s declared as inlined (%ld)... skipping\n", |
| name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue); |
| return NULL; |
| } |
| |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.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->load_offset + low_pc.u.uvalue, |
| ctx->thunks) >= 0) |
| return NULL; |
| if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl)) |
| is_decl.u.uvalue = 0; |
| |
| if (!(ret_type = dwarf2_lookup_type(ctx, di))) |
| { |
| ret_type = ctx->symt_cache[sc_void]; |
| assert(ret_type); |
| } |
| |
| /* FIXME: assuming C source code */ |
| sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C); |
| if (!is_decl.u.uvalue) |
| { |
| subpgm.func = symt_new_function(ctx->module, compiland, name.u.string, |
| ctx->load_offset + low_pc.u.uvalue, |
| high_pc.u.uvalue - low_pc.u.uvalue, |
| &sig_type->symt); |
| di->symt = &subpgm.func->symt; |
| } |
| else subpgm.func = NULL; |
| |
| subpgm.ctx = ctx; |
| subpgm.compiland = compiland; |
| if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base, |
| &subpgm.frame, NULL)) |
| { |
| /* on stack !! */ |
| subpgm.frame.kind = loc_regrel; |
| subpgm.frame.reg = 0; |
| subpgm.frame.offset = 0; |
| } |
| subpgm.non_computed_variable = FALSE; |
| |
| if (di->abbrev->have_child) /** any interest to not have child ? */ |
| { |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| |
| 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, NULL, 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)); |
| } |
| } |
| } |
| |
| if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user) |
| { |
| symt_add_function_point(ctx->module, subpgm.func, SymTagCustom, |
| &subpgm.frame, NULL); |
| } |
| if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func); |
| |
| return di->symt; |
| } |
| |
| static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx, |
| dwarf2_debug_info_t* di) |
| { |
| struct symt* ret_type; |
| struct symt_function_signature* sig_type; |
| |
| if (di->symt) return di->symt; |
| |
| TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); |
| |
| if (!(ret_type = dwarf2_lookup_type(ctx, di))) |
| { |
| ret_type = ctx->symt_cache[sc_void]; |
| assert(ret_type); |
| } |
| |
| /* FIXME: assuming C source code */ |
| sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C); |
| |
| if (di->abbrev->have_child) /** any interest to not have child ? */ |
| { |
| dwarf2_debug_info_t* child; |
| unsigned int i; |
| |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| child = *(dwarf2_debug_info_t**)vector_at(&di->children, i); |
| |
| switch (child->abbrev->tag) |
| { |
| case DW_TAG_formal_parameter: |
| symt_add_function_signature_parameter(ctx->module, sig_type, |
| dwarf2_lookup_type(ctx, child)); |
| break; |
| case DW_TAG_unspecified_parameters: |
| WARN("Unsupported unspecified parameters\n"); |
| break; |
| } |
| } |
| } |
| |
| return di->symt = &sig_type->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_volatile_type: |
| dwarf2_parse_volatile_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; |
| case DW_TAG_subroutine_type: |
| dwarf2_parse_subroutine_type(ctx, di); |
| break; |
| case DW_TAG_variable: |
| { |
| dwarf2_subprogram_t subpgm; |
| |
| subpgm.ctx = ctx; |
| subpgm.compiland = compiland; |
| subpgm.func = NULL; |
| subpgm.frame.kind = loc_absolute; |
| subpgm.frame.offset = 0; |
| subpgm.frame.reg = Wine_DW_no_register; |
| dwarf2_parse_variable(&subpgm, NULL, di); |
| } |
| break; |
| default: |
| FIXME("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, |
| const struct vector* v, unsigned file, unsigned line) |
| { |
| struct symt_function* func; |
| struct symt_ht* symt; |
| unsigned* psrc; |
| |
| if (!file || !(psrc = vector_at(v, file - 1))) return; |
| |
| TRACE("%s %lx %s %u\n", |
| debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line); |
| if (!(symt = symt_find_nearest(module, address)) || |
| symt->symt.tag != SymTagFunction) return; |
| func = (struct symt_function*)symt; |
| symt_add_func_line(module, func, *psrc, line, address - func->address); |
| } |
| |
| static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections, |
| dwarf2_parse_context_t* ctx, |
| const char* compile_dir, |
| 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; |
| |
| /* section with line numbers stripped */ |
| if (sections[section_line].address == ELF_NO_MAP) |
| return FALSE; |
| |
| traverse.data = sections[section_line].address + offset; |
| traverse.start_data = traverse.data; |
| traverse.end_data = traverse.data + 4; |
| 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 = compile_dir ? compile_dir : "."; |
| while (*traverse.data) |
| { |
| const char* rel = (const char*)traverse.data; |
| unsigned rellen = strlen(rel); |
| TRACE("Got include %s\n", rel); |
| traverse.data += rellen + 1; |
| p = vector_add(&dirs, &ctx->pool); |
| |
| if (*rel == '/' || !compile_dir) |
| *p = rel; |
| else |
| { |
| /* include directory relative to compile directory */ |
| unsigned baselen = strlen(compile_dir); |
| char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1); |
| strcpy(tmp, compile_dir); |
| if (tmp[baselen - 1] != '/') tmp[baselen++] = '/'; |
| strcpy(&tmp[baselen], rel); |
| *p = tmp; |
| } |
| |
| } |
| 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->load_offset + 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; |
| } |
| } |
| } |
| } |
| return TRUE; |
| } |
| |
| static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections, |
| struct module* module, |
| const struct elf_thunk_area* thunks, |
| dwarf2_traverse_context_t* mod_ctx, |
| unsigned long load_offset) |
| { |
| dwarf2_parse_context_t ctx; |
| dwarf2_traverse_context_t abbrev_ctx; |
| dwarf2_debug_info_t* di; |
| dwarf2_traverse_context_t cu_ctx; |
| const unsigned char* comp_unit_start = mod_ctx->data; |
| unsigned long cu_length; |
| unsigned short cu_version; |
| unsigned long cu_abbrev_offset; |
| BOOL ret = FALSE; |
| |
| cu_length = dwarf2_parse_u4(mod_ctx); |
| cu_ctx.data = cu_ctx.start_data = mod_ctx->data; |
| cu_ctx.end_data = mod_ctx->data + cu_length; |
| mod_ctx->data += cu_length; |
| cu_version = dwarf2_parse_u2(&cu_ctx); |
| cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx); |
| cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx); |
| |
| TRACE("Compilation Unit Header found at 0x%x:\n", |
| comp_unit_start - sections[section_debug].address); |
| TRACE("- length: %lu\n", cu_length); |
| TRACE("- version: %u\n", cu_version); |
| TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset); |
| TRACE("- word_size: %u\n", cu_ctx.word_size); |
| |
| if (cu_version != 2) |
| { |
| WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n", |
| cu_version); |
| return FALSE; |
| } |
| |
| pool_init(&ctx.pool, 65536); |
| ctx.sections = sections; |
| ctx.section = section_debug; |
| ctx.module = module; |
| ctx.word_size = cu_ctx.word_size; |
| ctx.thunks = thunks; |
| ctx.load_offset = load_offset; |
| ctx.ref_offset = comp_unit_start - sections[section_debug].address; |
| memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache)); |
| ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt; |
| |
| abbrev_ctx.start_data = sections[section_abbrev].address + cu_abbrev_offset; |
| abbrev_ctx.data = abbrev_ctx.start_data; |
| abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size; |
| abbrev_ctx.word_size = cu_ctx.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, &cu_ctx, &di); |
| |
| if (di->abbrev->tag == DW_TAG_compile_unit) |
| { |
| struct attribute name; |
| dwarf2_debug_info_t** pdi = NULL; |
| struct attribute stmt_list, low_pc; |
| struct attribute comp_dir; |
| |
| if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name)) |
| name.u.string = NULL; |
| |
| /* get working directory of current compilation unit */ |
| if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir)) |
| comp_dir.u.string = NULL; |
| |
| if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc)) |
| low_pc.u.uvalue = 0; |
| di->symt = &symt_new_compiland(module, |
| ctx.load_offset + low_pc.u.uvalue, |
| source_new(module, comp_dir.u.string, name.u.string))->symt; |
| |
| if (di->abbrev->have_child) |
| { |
| unsigned int i; |
| for (i=0; i<vector_length(&di->children); i++) |
| { |
| pdi = vector_at(&di->children, i); |
| dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt); |
| } |
| } |
| if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list)) |
| { |
| if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue)) |
| module->module.LineNumbers = TRUE; |
| } |
| ret = TRUE; |
| } |
| else FIXME("Should have a compilation unit here\n"); |
| pool_destroy(&ctx.pool); |
| return ret; |
| } |
| |
| static BOOL dwarf2_lookup_loclist(const struct module* module, const BYTE* start, |
| unsigned long ip, |
| dwarf2_traverse_context_t* lctx) |
| { |
| DWORD beg, end; |
| const BYTE* ptr = start; |
| DWORD len; |
| |
| while (ptr < module->dwarf2_info->debug_loc.address + module->dwarf2_info->debug_loc.size) |
| { |
| beg = dwarf2_get_u4(ptr); ptr += 4; |
| end = dwarf2_get_u4(ptr); ptr += 4; |
| if (!beg && !end) break; |
| len = dwarf2_get_u2(ptr); ptr += 2; |
| |
| if (beg <= ip && ip < end) |
| { |
| lctx->data = ptr; |
| lctx->end_data = ptr + len; |
| lctx->word_size = 4; /* FIXME word size !!! */ |
| return TRUE; |
| } |
| ptr += len; |
| } |
| WARN("Couldn't find ip in location list\n"); |
| return FALSE; |
| } |
| |
| static enum location_error loc_compute_frame(struct process* pcs, |
| const struct module* module, |
| const struct symt_function* func, |
| DWORD ip, struct location* frame) |
| { |
| struct symt** psym = NULL; |
| struct location* pframe; |
| dwarf2_traverse_context_t lctx; |
| enum location_error err; |
| unsigned int i; |
| |
| for (i=0; i<vector_length(&func->vchildren); i++) |
| { |
| psym = vector_at(&func->vchildren, i); |
| if ((*psym)->tag == SymTagCustom) |
| { |
| pframe = &((struct symt_hierarchy_point*)*psym)->loc; |
| |
| /* First, recompute the frame information, if needed */ |
| switch (pframe->kind) |
| { |
| case loc_regrel: |
| case loc_register: |
| *frame = *pframe; |
| break; |
| case loc_dwarf2_location_list: |
| WARN("Searching loclist for %s\n", func->hash_elt.name); |
| if (!dwarf2_lookup_loclist(module, |
| module->dwarf2_info->debug_loc.address + pframe->offset, |
| ip, &lctx)) |
| return loc_err_out_of_scope; |
| if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err; |
| if (frame->kind >= loc_user) |
| { |
| WARN("Couldn't compute runtime frame location\n"); |
| return loc_err_too_complex; |
| } |
| break; |
| default: |
| WARN("Unsupported frame kind %d\n", pframe->kind); |
| return loc_err_internal; |
| } |
| return 0; |
| } |
| } |
| WARN("Couldn't find Custom function point, whilst location list offset is searched\n"); |
| return loc_err_internal; |
| } |
| |
| static void dwarf2_location_compute(struct process* pcs, |
| const struct module* module, |
| const struct symt_function* func, |
| struct location* loc) |
| { |
| struct location frame; |
| DWORD ip; |
| int err; |
| dwarf2_traverse_context_t lctx; |
| |
| if (!func->container || func->container->tag != SymTagCompiland) |
| { |
| WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name); |
| err = loc_err_internal; |
| } |
| else |
| { |
| /* instruction pointer relative to compiland's start */ |
| ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address; |
| |
| if ((err = loc_compute_frame(pcs, module, func, ip, &frame)) == 0) |
| { |
| switch (loc->kind) |
| { |
| case loc_dwarf2_location_list: |
| /* Then, if the variable has a location list, find it !! */ |
| if (dwarf2_lookup_loclist(module, |
| module->dwarf2_info->debug_loc.address + loc->offset, |
| ip, &lctx)) |
| goto do_compute; |
| err = loc_err_out_of_scope; |
| break; |
| case loc_dwarf2_block: |
| /* or if we have a copy of an existing block, get ready for it */ |
| { |
| unsigned* ptr = (unsigned*)loc->offset; |
| |
| lctx.data = (const BYTE*)(ptr + 1); |
| lctx.end_data = lctx.data + *ptr; |
| lctx.word_size = 4; /* FIXME !! */ |
| } |
| do_compute: |
| /* now get the variable */ |
| err = compute_location(&lctx, loc, pcs->handle, &frame); |
| break; |
| case loc_register: |
| case loc_regrel: |
| /* nothing to do */ |
| break; |
| default: |
| WARN("Unsupported local kind %d\n", loc->kind); |
| err = loc_err_internal; |
| } |
| } |
| } |
| if (err < 0) |
| { |
| loc->kind = loc_register; |
| loc->reg = err; |
| } |
| } |
| |
| 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, |
| const unsigned char* loclist, unsigned int loclist_size) |
| { |
| dwarf2_section_t section[section_max]; |
| unsigned char* ptr; |
| dwarf2_traverse_context_t mod_ctx; |
| |
| mod_ctx.start_data = mod_ctx.data = debug; |
| mod_ctx.end_data = debug + debug_size; |
| |
| module->loc_compute = dwarf2_location_compute; |
| |
| 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; |
| |
| if (loclist_size) |
| { |
| /* initialize the dwarf2 specific info block for this module. |
| * As we'll need later on the .debug_loc section content, we copy it in |
| * the module structure for later reuse |
| */ |
| module->dwarf2_info = HeapAlloc(GetProcessHeap(), 0, sizeof(*module->dwarf2_info) + loclist_size); |
| if (!module->dwarf2_info) return FALSE; |
| ptr = (unsigned char*)(module->dwarf2_info + 1); |
| memcpy(ptr, loclist, loclist_size); |
| module->dwarf2_info->debug_loc.address = ptr; |
| module->dwarf2_info->debug_loc.size = loclist_size; |
| } |
| |
| while (mod_ctx.data < mod_ctx.end_data) |
| { |
| dwarf2_parse_compilation_unit(section, module, thunks, &mod_ctx, load_offset); |
| } |
| module->module.SymType = SymDia; |
| module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24); |
| /* FIXME: we could have a finer grain here */ |
| module->module.GlobalSymbols = TRUE; |
| module->module.TypeInfo = TRUE; |
| module->module.SourceIndexed = TRUE; |
| module->module.Publics = TRUE; |
| return TRUE; |
| } |
