vba-linux: src/gba/elf.cpp annotate

annotate src/gba/elf.cpp @ 1:f9f4f1b99eed

importing src directory

author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
parents
children

rev	line source
rlm@1	1 #include <cstdio>
rlm@1	2 #include <cstdlib>
rlm@1	3 #include <cstring>
rlm@1	4
rlm@1	5 #include "../Port.h"
rlm@1	6 #include "../NLS.h"
rlm@1	7 #include "../common/System.h" // systemMessage
rlm@1	8 #include "GBAGlobals.h"
rlm@1	9 #include "elf.h"
rlm@1	10
rlm@1	11 #define elfReadMemory(addr) \
rlm@1	12 READ32LE((&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask]))
rlm@1	13
rlm@1	14 #define DW_TAG_array_type 0x01
rlm@1	15 #define DW_TAG_enumeration_type 0x04
rlm@1	16 #define DW_TAG_formal_parameter 0x05
rlm@1	17 #define DW_TAG_label 0x0a
rlm@1	18 #define DW_TAG_lexical_block 0x0b
rlm@1	19 #define DW_TAG_member 0x0d
rlm@1	20 #define DW_TAG_pointer_type 0x0f
rlm@1	21 #define DW_TAG_reference_type 0x10
rlm@1	22 #define DW_TAG_compile_unit 0x11
rlm@1	23 #define DW_TAG_structure_type 0x13
rlm@1	24 #define DW_TAG_subroutine_type 0x15
rlm@1	25 #define DW_TAG_typedef 0x16
rlm@1	26 #define DW_TAG_union_type 0x17
rlm@1	27 #define DW_TAG_unspecified_parameters 0x18
rlm@1	28 #define DW_TAG_inheritance 0x1c
rlm@1	29 #define DW_TAG_inlined_subroutine 0x1d
rlm@1	30 #define DW_TAG_subrange_type 0x21
rlm@1	31 #define DW_TAG_base_type 0x24
rlm@1	32 #define DW_TAG_const_type 0x26
rlm@1	33 #define DW_TAG_enumerator 0x28
rlm@1	34 #define DW_TAG_subprogram 0x2e
rlm@1	35 #define DW_TAG_variable 0x34
rlm@1	36 #define DW_TAG_volatile_type 0x35
rlm@1	37
rlm@1	38 #define DW_AT_sibling 0x01
rlm@1	39 #define DW_AT_location 0x02
rlm@1	40 #define DW_AT_name 0x03
rlm@1	41 #define DW_AT_byte_size 0x0b
rlm@1	42 #define DW_AT_bit_offset 0x0c
rlm@1	43 #define DW_AT_bit_size 0x0d
rlm@1	44 #define DW_AT_stmt_list 0x10
rlm@1	45 #define DW_AT_low_pc 0x11
rlm@1	46 #define DW_AT_high_pc 0x12
rlm@1	47 #define DW_AT_language 0x13
rlm@1	48 #define DW_AT_compdir 0x1b
rlm@1	49 #define DW_AT_const_value 0x1c
rlm@1	50 #define DW_AT_containing_type 0x1d
rlm@1	51 #define DW_AT_inline 0x20
rlm@1	52 #define DW_AT_producer 0x25
rlm@1	53 #define DW_AT_prototyped 0x27
rlm@1	54 #define DW_AT_upper_bound 0x2f
rlm@1	55 #define DW_AT_abstract_origin 0x31
rlm@1	56 #define DW_AT_accessibility 0x32
rlm@1	57 #define DW_AT_artificial 0x34
rlm@1	58 #define DW_AT_data_member_location 0x38
rlm@1	59 #define DW_AT_decl_file 0x3a
rlm@1	60 #define DW_AT_decl_line 0x3b
rlm@1	61 #define DW_AT_declaration 0x3c
rlm@1	62 #define DW_AT_encoding 0x3e
rlm@1	63 #define DW_AT_external 0x3f
rlm@1	64 #define DW_AT_frame_base 0x40
rlm@1	65 #define DW_AT_macro_info 0x43
rlm@1	66 #define DW_AT_specification 0x47
rlm@1	67 #define DW_AT_type 0x49
rlm@1	68 #define DW_AT_virtuality 0x4c
rlm@1	69 #define DW_AT_vtable_elem_location 0x4d
rlm@1	70 // DWARF 2.1/3.0 extensions
rlm@1	71 #define DW_AT_entry_pc 0x52
rlm@1	72 #define DW_AT_ranges 0x55
rlm@1	73 // ARM Compiler extensions
rlm@1	74 #define DW_AT_proc_body 0x2000
rlm@1	75 #define DW_AT_save_offset 0x2001
rlm@1	76 #define DW_AT_user_2002 0x2002
rlm@1	77 // MIPS extensions
rlm@1	78 #define DW_AT_MIPS_linkage_name 0x2007
rlm@1	79
rlm@1	80 #define DW_FORM_addr 0x01
rlm@1	81 #define DW_FORM_data2 0x05
rlm@1	82 #define DW_FORM_data4 0x06
rlm@1	83 #define DW_FORM_string 0x08
rlm@1	84 #define DW_FORM_block 0x09
rlm@1	85 #define DW_FORM_block1 0x0a
rlm@1	86 #define DW_FORM_data1 0x0b
rlm@1	87 #define DW_FORM_flag 0x0c
rlm@1	88 #define DW_FORM_sdata 0x0d
rlm@1	89 #define DW_FORM_strp 0x0e
rlm@1	90 #define DW_FORM_udata 0x0f
rlm@1	91 #define DW_FORM_ref_addr 0x10
rlm@1	92 #define DW_FORM_ref4 0x13
rlm@1	93 #define DW_FORM_ref_udata 0x15
rlm@1	94 #define DW_FORM_indirect 0x16
rlm@1	95
rlm@1	96 #define DW_OP_addr 0x03
rlm@1	97 #define DW_OP_plus_uconst 0x23
rlm@1	98 #define DW_OP_reg0 0x50
rlm@1	99 #define DW_OP_reg1 0x51
rlm@1	100 #define DW_OP_reg2 0x52
rlm@1	101 #define DW_OP_reg3 0x53
rlm@1	102 #define DW_OP_reg4 0x54
rlm@1	103 #define DW_OP_reg5 0x55
rlm@1	104 #define DW_OP_reg6 0x56
rlm@1	105 #define DW_OP_reg7 0x57
rlm@1	106 #define DW_OP_reg8 0x58
rlm@1	107 #define DW_OP_reg9 0x59
rlm@1	108 #define DW_OP_reg10 0x5a
rlm@1	109 #define DW_OP_reg11 0x5b
rlm@1	110 #define DW_OP_reg12 0x5c
rlm@1	111 #define DW_OP_reg13 0x5d
rlm@1	112 #define DW_OP_reg14 0x5e
rlm@1	113 #define DW_OP_reg15 0x5f
rlm@1	114 #define DW_OP_fbreg 0x91
rlm@1	115
rlm@1	116 #define DW_LNS_extended_op 0x00
rlm@1	117 #define DW_LNS_copy 0x01
rlm@1	118 #define DW_LNS_advance_pc 0x02
rlm@1	119 #define DW_LNS_advance_line 0x03
rlm@1	120 #define DW_LNS_set_file 0x04
rlm@1	121 #define DW_LNS_set_column 0x05
rlm@1	122 #define DW_LNS_negate_stmt 0x06
rlm@1	123 #define DW_LNS_set_basic_block 0x07
rlm@1	124 #define DW_LNS_const_add_pc 0x08
rlm@1	125 #define DW_LNS_fixed_advance_pc 0x09
rlm@1	126
rlm@1	127 #define DW_LNE_end_sequence 0x01
rlm@1	128 #define DW_LNE_set_address 0x02
rlm@1	129 #define DW_LNE_define_file 0x03
rlm@1	130
rlm@1	131 #define DW_CFA_advance_loc 0x01
rlm@1	132 #define DW_CFA_offset 0x02
rlm@1	133 #define DW_CFA_restore 0x03
rlm@1	134 #define DW_CFA_set_loc 0x01
rlm@1	135 #define DW_CFA_advance_loc1 0x02
rlm@1	136 #define DW_CFA_advance_loc2 0x03
rlm@1	137 #define DW_CFA_advance_loc4 0x04
rlm@1	138 #define DW_CFA_offset_extended 0x05
rlm@1	139 #define DW_CFA_restore_extended 0x06
rlm@1	140 #define DW_CFA_undefined 0x07
rlm@1	141 #define DW_CFA_same_value 0x08
rlm@1	142 #define DW_CFA_register 0x09
rlm@1	143 #define DW_CFA_remember_state 0x0a
rlm@1	144 #define DW_CFA_restore_state 0x0b
rlm@1	145 #define DW_CFA_def_cfa 0x0c
rlm@1	146 #define DW_CFA_def_cfa_register 0x0d
rlm@1	147 #define DW_CFA_def_cfa_offset 0x0e
rlm@1	148 #define DW_CFA_nop 0x00
rlm@1	149
rlm@1	150 #define CASE_TYPE_TAG \
rlm@1	151 case DW_TAG_const_type: \
rlm@1	152 case DW_TAG_volatile_type: \
rlm@1	153 case DW_TAG_pointer_type: \
rlm@1	154 case DW_TAG_base_type: \
rlm@1	155 case DW_TAG_array_type: \
rlm@1	156 case DW_TAG_structure_type: \
rlm@1	157 case DW_TAG_union_type: \
rlm@1	158 case DW_TAG_typedef: \
rlm@1	159 case DW_TAG_subroutine_type: \
rlm@1	160 case DW_TAG_enumeration_type: \
rlm@1	161 case DW_TAG_enumerator: \
rlm@1	162 case DW_TAG_reference_type
rlm@1	163
rlm@1	164 struct ELFcie
rlm@1	165 {
rlm@1	166 ELFcie *next;
rlm@1	167 u32 offset;
rlm@1	168 u8 * augmentation;
rlm@1	169 u32 codeAlign;
rlm@1	170 s32 dataAlign;
rlm@1	171 int returnAddress;
rlm@1	172 u8 * data;
rlm@1	173 u32 dataLen;
rlm@1	174 };
rlm@1	175
rlm@1	176 struct ELFfde
rlm@1	177 {
rlm@1	178 ELFcie *cie;
rlm@1	179 u32 address;
rlm@1	180 u32 end;
rlm@1	181 u8 * data;
rlm@1	182 u32 dataLen;
rlm@1	183 };
rlm@1	184
rlm@1	185 enum ELFRegMode
rlm@1	186 {
rlm@1	187 REG_NOT_SET,
rlm@1	188 REG_OFFSET,
rlm@1	189 REG_REGISTER
rlm@1	190 };
rlm@1	191
rlm@1	192 struct ELFFrameStateRegister
rlm@1	193 {
rlm@1	194 ELFRegMode mode;
rlm@1	195 int reg;
rlm@1	196 s32 offset;
rlm@1	197 };
rlm@1	198
rlm@1	199 struct ELFFrameStateRegisters
rlm@1	200 {
rlm@1	201 ELFFrameStateRegister regs[16];
rlm@1	202 ELFFrameStateRegisters *previous;
rlm@1	203 };
rlm@1	204
rlm@1	205 enum ELFCfaMode
rlm@1	206 {
rlm@1	207 CFA_NOT_SET,
rlm@1	208 CFA_REG_OFFSET
rlm@1	209 };
rlm@1	210
rlm@1	211 struct ELFFrameState
rlm@1	212 {
rlm@1	213 ELFFrameStateRegisters registers;
rlm@1	214
rlm@1	215 ELFCfaMode cfaMode;
rlm@1	216 int cfaRegister;
rlm@1	217 s32 cfaOffset;
rlm@1	218
rlm@1	219 u32 pc;
rlm@1	220
rlm@1	221 int dataAlign;
rlm@1	222 int codeAlign;
rlm@1	223 int returnAddress;
rlm@1	224 };
rlm@1	225
rlm@1	226 extern bool8 cpuIsMultiBoot;
rlm@1	227
rlm@1	228 Symbol *elfSymbols = NULL;
rlm@1	229 char * elfSymbolsStrTab = NULL;
rlm@1	230 int elfSymbolsCount = 0;
rlm@1	231
rlm@1	232 ELFSectionHeader **elfSectionHeaders = NULL;
rlm@1	233 char *elfSectionHeadersStringTable = NULL;
rlm@1	234 int elfSectionHeadersCount = 0;
rlm@1	235 u8 * elfFileData = NULL;
rlm@1	236
rlm@1	237 CompileUnit *elfCompileUnits = NULL;
rlm@1	238 DebugInfo * elfDebugInfo = NULL;
rlm@1	239 char * elfDebugStrings = NULL;
rlm@1	240
rlm@1	241 ELFcie * elfCies = NULL;
rlm@1	242 ELFfde **elfFdes = NULL;
rlm@1	243 int elfFdeCount = 0;
rlm@1	244
rlm@1	245 CompileUnit *elfCurrentUnit = NULL;
rlm@1	246
rlm@1	247 u32 elfRead4Bytes(u8 *);
rlm@1	248 u16 elfRead2Bytes(u8 *);
rlm@1	249
rlm@1	250 CompileUnit *elfGetCompileUnit(u32 addr)
rlm@1	251 {
rlm@1	252 if (elfCompileUnits)
rlm@1	253 {
rlm@1	254 CompileUnit *unit = elfCompileUnits;
rlm@1	255 while (unit)
rlm@1	256 {
rlm@1	257 if (unit->lowPC)
rlm@1	258 {
rlm@1	259 if (addr >= unit->lowPC && addr < unit->highPC)
rlm@1	260 return unit;
rlm@1	261 }
rlm@1	262 else
rlm@1	263 {
rlm@1	264 ARanges *r = unit->ranges;
rlm@1	265 if (r)
rlm@1	266 {
rlm@1	267 int count = r->count;
rlm@1	268 for (int j = 0; j < count; j++)
rlm@1	269 {
rlm@1	270 if (addr >= r->ranges[j].lowPC && addr < r->ranges[j].highPC)
rlm@1	271 return unit;
rlm@1	272 }
rlm@1	273 }
rlm@1	274 }
rlm@1	275 unit = unit->next;
rlm@1	276 }
rlm@1	277 }
rlm@1	278 return NULL;
rlm@1	279 }
rlm@1	280
rlm@1	281 char *elfGetAddressSymbol(u32 addr)
rlm@1	282 {
rlm@1	283 static char buffer[256];
rlm@1	284
rlm@1	285 CompileUnit *unit = elfGetCompileUnit(addr);
rlm@1	286 // found unit, need to find function
rlm@1	287 if (unit)
rlm@1	288 {
rlm@1	289 Function *func = unit->functions;
rlm@1	290 while (func)
rlm@1	291 {
rlm@1	292 if (addr >= func->lowPC && addr < func->highPC)
rlm@1	293 {
rlm@1	294 int offset = addr - func->lowPC;
rlm@1	295 char *name = func->name;
rlm@1	296 if (!name)
rlm@1	297 name = "";
rlm@1	298 if (offset)
rlm@1	299 sprintf(buffer, "%s+%d", name, offset);
rlm@1	300 else
rlm@1	301 strcpy(buffer, name);
rlm@1	302 return buffer;
rlm@1	303 }
rlm@1	304 func = func->next;
rlm@1	305 }
rlm@1	306 }
rlm@1	307
rlm@1	308 if (elfSymbolsCount)
rlm@1	309 {
rlm@1	310 for (int i = 0; i < elfSymbolsCount; i++)
rlm@1	311 {
rlm@1	312 Symbol *s = &elfSymbols[i];
rlm@1	313 if ((addr >= s->value) && addr < (s->value+s->size))
rlm@1	314 {
rlm@1	315 int offset = addr-s->value;
rlm@1	316 char *name = s->name;
rlm@1	317 if (name == NULL)
rlm@1	318 name = "";
rlm@1	319 if (offset)
rlm@1	320 sprintf(buffer, "%s+%d", name, addr-s->value);
rlm@1	321 else
rlm@1	322 strcpy(buffer, name);
rlm@1	323 return buffer;
rlm@1	324 }
rlm@1	325 else if (addr == s->value)
rlm@1	326 {
rlm@1	327 if (s->name)
rlm@1	328 strcpy(buffer, s->name);
rlm@1	329 else
rlm@1	330 strcpy(buffer, "");
rlm@1	331 return buffer;
rlm@1	332 }
rlm@1	333 }
rlm@1	334 }
rlm@1	335
rlm@1	336 return "";
rlm@1	337 }
rlm@1	338
rlm@1	339 bool elfFindLineInModule(u32 addr, char name, int line)
rlm@1	340 {
rlm@1	341 CompileUnit *unit = elfCompileUnits;
rlm@1	342
rlm@1	343 while (unit)
rlm@1	344 {
rlm@1	345 if (unit->lineInfoTable)
rlm@1	346 {
rlm@1	347 int i;
rlm@1	348 int count = unit->lineInfoTable->fileCount;
rlm@1	349 char *found = NULL;
rlm@1	350 for (i = 0; i < count; i++)
rlm@1	351 {
rlm@1	352 if (strcmp(name, unit->lineInfoTable->files[i]) == 0)
rlm@1	353 {
rlm@1	354 found = unit->lineInfoTable->files[i];
rlm@1	355 break;
rlm@1	356 }
rlm@1	357 }
rlm@1	358 // found a matching filename... try to find line now
rlm@1	359 if (found)
rlm@1	360 {
rlm@1	361 LineInfoItem *table = unit->lineInfoTable->lines;
rlm@1	362 count = unit->lineInfoTable->number;
rlm@1	363 for (i = 0; i < count; i++)
rlm@1	364 {
rlm@1	365 if (table[i].file == found && table[i].line == line)
rlm@1	366 {
rlm@1	367 *addr = table[i].address;
rlm@1	368 return true;
rlm@1	369 }
rlm@1	370 }
rlm@1	371 // we can only find a single match
rlm@1	372 return false;
rlm@1	373 }
rlm@1	374 }
rlm@1	375 unit = unit->next;
rlm@1	376 }
rlm@1	377 return false;
rlm@1	378 }
rlm@1	379
rlm@1	380 int elfFindLine(CompileUnit unit, Function /* func /, u32 addr, char *f)
rlm@1	381 {
rlm@1	382 int currentLine = -1;
rlm@1	383 if (unit->hasLineInfo)
rlm@1	384 {
rlm@1	385 int count = unit->lineInfoTable->number;
rlm@1	386 LineInfoItem *table = unit->lineInfoTable->lines;
rlm@1	387 int i;
rlm@1	388 for (i = 0; i < count; i++)
rlm@1	389 {
rlm@1	390 if (addr <= table[i].address)
rlm@1	391 break;
rlm@1	392 }
rlm@1	393 if (i == count)
rlm@1	394 i--;
rlm@1	395 *f = table[i].file;
rlm@1	396 currentLine = table[i].line;
rlm@1	397 }
rlm@1	398 return currentLine;
rlm@1	399 }
rlm@1	400
rlm@1	401 bool elfFindLineInUnit(u32 addr, CompileUnit unit, int line)
rlm@1	402 {
rlm@1	403 if (unit->hasLineInfo)
rlm@1	404 {
rlm@1	405 int count = unit->lineInfoTable->number;
rlm@1	406 LineInfoItem *table = unit->lineInfoTable->lines;
rlm@1	407 int i;
rlm@1	408 for (i = 0; i < count; i++)
rlm@1	409 {
rlm@1	410 if (line == table[i].line)
rlm@1	411 {
rlm@1	412 *addr = table[i].address;
rlm@1	413 return true;
rlm@1	414 }
rlm@1	415 }
rlm@1	416 }
rlm@1	417 return false;
rlm@1	418 }
rlm@1	419
rlm@1	420 bool elfGetCurrentFunction(u32 addr, Function f, CompileUnit u)
rlm@1	421 {
rlm@1	422 CompileUnit *unit = elfGetCompileUnit(addr);
rlm@1	423 // found unit, need to find function
rlm@1	424 if (unit)
rlm@1	425 {
rlm@1	426 Function *func = unit->functions;
rlm@1	427 while (func)
rlm@1	428 {
rlm@1	429 if (addr >= func->lowPC && addr < func->highPC)
rlm@1	430 {
rlm@1	431 *f = func;
rlm@1	432 *u = unit;
rlm@1	433 return true;
rlm@1	434 }
rlm@1	435 func = func->next;
rlm@1	436 }
rlm@1	437 }
rlm@1	438 return false;
rlm@1	439 }
rlm@1	440
rlm@1	441 bool elfGetObject(char name, Function f, CompileUnit u, Object *o)
rlm@1	442 {
rlm@1	443 if (f && u)
rlm@1	444 {
rlm@1	445 Object *v = f->variables;
rlm@1	446
rlm@1	447 while (v)
rlm@1	448 {
rlm@1	449 if (strcmp(name, v->name) == 0)
rlm@1	450 {
rlm@1	451 *o = v;
rlm@1	452 return true;
rlm@1	453 }
rlm@1	454 v = v->next;
rlm@1	455 }
rlm@1	456 v = f->parameters;
rlm@1	457 while (v)
rlm@1	458 {
rlm@1	459 if (strcmp(name, v->name) == 0)
rlm@1	460 {
rlm@1	461 *o = v;
rlm@1	462 return true;
rlm@1	463 }
rlm@1	464 v = v->next;
rlm@1	465 }
rlm@1	466 v = u->variables;
rlm@1	467 while (v)
rlm@1	468 {
rlm@1	469 if (strcmp(name, v->name) == 0)
rlm@1	470 {
rlm@1	471 *o = v;
rlm@1	472 return true;
rlm@1	473 }
rlm@1	474 v = v->next;
rlm@1	475 }
rlm@1	476 }
rlm@1	477
rlm@1	478 CompileUnit *c = elfCompileUnits;
rlm@1	479
rlm@1	480 while (c)
rlm@1	481 {
rlm@1	482 if (c != u)
rlm@1	483 {
rlm@1	484 Object *v = c->variables;
rlm@1	485 while (v)
rlm@1	486 {
rlm@1	487 if (strcmp(name, v->name) == 0)
rlm@1	488 {
rlm@1	489 *o = v;
rlm@1	490 return true;
rlm@1	491 }
rlm@1	492 v = v->next;
rlm@1	493 }
rlm@1	494 }
rlm@1	495 c = c->next;
rlm@1	496 }
rlm@1	497
rlm@1	498 return false;
rlm@1	499 }
rlm@1	500
rlm@1	501 char elfGetSymbol(int i, u32 value, u32 size, int type)
rlm@1	502 {
rlm@1	503 if (i < elfSymbolsCount)
rlm@1	504 {
rlm@1	505 Symbol *s = &elfSymbols[i];
rlm@1	506 *value = s->value;
rlm@1	507 *size = s->size;
rlm@1	508 *type = s->type;
rlm@1	509 return s->name;
rlm@1	510 }
rlm@1	511 return NULL;
rlm@1	512 }
rlm@1	513
rlm@1	514 bool elfGetSymbolAddress(char sym, u32 addr, u32 size, int type)
rlm@1	515 {
rlm@1	516 if (elfSymbolsCount)
rlm@1	517 {
rlm@1	518 for (int i = 0; i < elfSymbolsCount; i++)
rlm@1	519 {
rlm@1	520 Symbol *s = &elfSymbols[i];
rlm@1	521 if (strcmp(sym, s->name) == 0)
rlm@1	522 {
rlm@1	523 *addr = s->value;
rlm@1	524 *size = s->size;
rlm@1	525 *type = s->type;
rlm@1	526 return true;
rlm@1	527 }
rlm@1	528 }
rlm@1	529 }
rlm@1	530 return false;
rlm@1	531 }
rlm@1	532
rlm@1	533 ELFfde *elfGetFde(u32 address)
rlm@1	534 {
rlm@1	535 if (elfFdes)
rlm@1	536 {
rlm@1	537 int i;
rlm@1	538 for (i = 0; i < elfFdeCount; i++)
rlm@1	539 {
rlm@1	540 if (address >= elfFdes[i]->address &&
rlm@1	541 address < elfFdes[i]->end)
rlm@1	542 {
rlm@1	543 return elfFdes[i];
rlm@1	544 }
rlm@1	545 }
rlm@1	546 }
rlm@1	547
rlm@1	548 return NULL;
rlm@1	549 }
rlm@1	550
rlm@1	551 void elfExecuteCFAInstructions(ELFFrameState state, u8 data, u32 len,
rlm@1	552 u32 pc)
rlm@1	553 {
rlm@1	554 u8 *end = data + len;
rlm@1	555 int bytes;
rlm@1	556 int reg;
rlm@1	557 ELFFrameStateRegisters *fs;
rlm@1	558
rlm@1	559 while (data < end && state->pc < pc)
rlm@1	560 {
rlm@1	561 u8 op = *data++;
rlm@1	562
rlm@1	563 switch (op >> 6)
rlm@1	564 {
rlm@1	565 case DW_CFA_advance_loc:
rlm@1	566 state->pc += (op & 0x3f) * state->codeAlign;
rlm@1	567 break;
rlm@1	568 case DW_CFA_offset:
rlm@1	569 reg = op & 0x3f;
rlm@1	570 state->registers.regs[reg].mode = REG_OFFSET;
rlm@1	571 state->registers.regs[reg].offset = state->dataAlign *
rlm@1	572 (s32)elfReadLEB128(data, &bytes);
rlm@1	573 data += bytes;
rlm@1	574 break;
rlm@1	575 case DW_CFA_restore:
rlm@1	576 // we don't care much about the other possible settings,
rlm@1	577 // so just setting to unset is enough for now
rlm@1	578 state->registers.regs[op & 0x3f].mode = REG_NOT_SET;
rlm@1	579 break;
rlm@1	580 case 0:
rlm@1	581 switch (op & 0x3f)
rlm@1	582 {
rlm@1	583 case DW_CFA_nop:
rlm@1	584 break;
rlm@1	585 case DW_CFA_advance_loc1:
rlm@1	586 state->pc += state->codeAlign * (*data++);
rlm@1	587 break;
rlm@1	588 case DW_CFA_advance_loc2:
rlm@1	589 state->pc += state->codeAlign * elfRead2Bytes(data);
rlm@1	590 data += 2;
rlm@1	591 break;
rlm@1	592 case DW_CFA_advance_loc4:
rlm@1	593 state->pc += state->codeAlign * elfRead4Bytes(data);
rlm@1	594 data += 4;
rlm@1	595 break;
rlm@1	596 case DW_CFA_offset_extended:
rlm@1	597 reg = elfReadLEB128(data, &bytes);
rlm@1	598 data += bytes;
rlm@1	599 state->registers.regs[reg].mode = REG_OFFSET;
rlm@1	600 state->registers.regs[reg].offset = state->dataAlign *
rlm@1	601 (s32)elfReadLEB128(data, &bytes);
rlm@1	602 data += bytes;
rlm@1	603 break;
rlm@1	604 case DW_CFA_restore_extended:
rlm@1	605 case DW_CFA_undefined:
rlm@1	606 case DW_CFA_same_value:
rlm@1	607 reg = elfReadLEB128(data, &bytes);
rlm@1	608 data += bytes;
rlm@1	609 state->registers.regs[reg].mode = REG_NOT_SET;
rlm@1	610 break;
rlm@1	611 case DW_CFA_register:
rlm@1	612 reg = elfReadLEB128(data, &bytes);
rlm@1	613 data += bytes;
rlm@1	614 state->registers.regs[reg].mode = REG_REGISTER;
rlm@1	615 state->registers.regs[reg].reg = elfReadLEB128(data, &bytes);
rlm@1	616 data += bytes;
rlm@1	617 break;
rlm@1	618 case DW_CFA_remember_state:
rlm@1	619 fs = (ELFFrameStateRegisters *)calloc(1,
rlm@1	620 sizeof(ELFFrameStateRegisters));
rlm@1	621 memcpy(fs, &state->registers, sizeof(ELFFrameStateRegisters));
rlm@1	622 state->registers.previous = fs;
rlm@1	623 break;
rlm@1	624 case DW_CFA_restore_state:
rlm@1	625 if (state->registers.previous == NULL)
rlm@1	626 {
rlm@1	627 printf("Error: previous frame state is NULL.\n");
rlm@1	628 return;
rlm@1	629 }
rlm@1	630 fs = state->registers.previous;
rlm@1	631 memcpy(&state->registers, fs, sizeof(ELFFrameStateRegisters));
rlm@1	632 free(fs);
rlm@1	633 break;
rlm@1	634 case DW_CFA_def_cfa:
rlm@1	635 state->cfaRegister = elfReadLEB128(data, &bytes);
rlm@1	636 data += bytes;
rlm@1	637 state->cfaOffset = (s32)elfReadLEB128(data, &bytes);
rlm@1	638 data += bytes;
rlm@1	639 state->cfaMode = CFA_REG_OFFSET;
rlm@1	640 break;
rlm@1	641 case DW_CFA_def_cfa_register:
rlm@1	642 state->cfaRegister = elfReadLEB128(data, &bytes);
rlm@1	643 data += bytes;
rlm@1	644 state->cfaMode = CFA_REG_OFFSET;
rlm@1	645 break;
rlm@1	646 case DW_CFA_def_cfa_offset:
rlm@1	647 state->cfaOffset = (s32)elfReadLEB128(data, &bytes);
rlm@1	648 data += bytes;
rlm@1	649 state->cfaMode = CFA_REG_OFFSET;
rlm@1	650 break;
rlm@1	651 default:
rlm@1	652 printf("Unknown CFA opcode %08x\n", op);
rlm@1	653 return;
rlm@1	654 }
rlm@1	655 break;
rlm@1	656 default:
rlm@1	657 printf("Unknown CFA opcode %08x\n", op);
rlm@1	658 return;
rlm@1	659 }
rlm@1	660 }
rlm@1	661 }
rlm@1	662
rlm@1	663 ELFFrameState elfGetFrameState(ELFfde fde, u32 address)
rlm@1	664 {
rlm@1	665 ELFFrameState state = (ELFFrameState )calloc(1, sizeof(ELFFrameState));
rlm@1	666 state->pc = fde->address;
rlm@1	667 state->dataAlign = fde->cie->dataAlign;
rlm@1	668 state->codeAlign = fde->cie->codeAlign;
rlm@1	669 state->returnAddress = fde->cie->returnAddress;
rlm@1	670
rlm@1	671 elfExecuteCFAInstructions(state,
rlm@1	672 fde->cie->data,
rlm@1	673 fde->cie->dataLen,
rlm@1	674 0xffffffff);
rlm@1	675 elfExecuteCFAInstructions(state,
rlm@1	676 fde->data,
rlm@1	677 fde->dataLen,
rlm@1	678 address);
rlm@1	679
rlm@1	680 return state;
rlm@1	681 }
rlm@1	682
rlm@1	683 void elfPrintCallChain(u32 address)
rlm@1	684 {
rlm@1	685 int count = 1;
rlm@1	686
rlm@1	687 reg_pair regs[15];
rlm@1	688 reg_pair newRegs[15];
rlm@1	689
rlm@1	690 memcpy(&regs[0], &reg[0], sizeof(reg_pair) * 15);
rlm@1	691
rlm@1	692 while (count < 20)
rlm@1	693 {
rlm@1	694 char *addr = elfGetAddressSymbol(address);
rlm@1	695 if (*addr == 0)
rlm@1	696 addr = "???";
rlm@1	697
rlm@1	698 printf("%08x %s\n", address, addr);
rlm@1	699
rlm@1	700 ELFfde *fde = elfGetFde(address);
rlm@1	701
rlm@1	702 if (fde == NULL)
rlm@1	703 {
rlm@1	704 break;
rlm@1	705 }
rlm@1	706
rlm@1	707 ELFFrameState *state = elfGetFrameState(fde, address);
rlm@1	708
rlm@1	709 if (!state)
rlm@1	710 {
rlm@1	711 break;
rlm@1	712 }
rlm@1	713
rlm@1	714 if (state->cfaMode == CFA_REG_OFFSET)
rlm@1	715 {
rlm@1	716 memcpy(&newRegs[0], &regs[0], sizeof(reg_pair) * 15);
rlm@1	717 u32 addr = 0;
rlm@1	718 for (int i = 0; i < 15; i++)
rlm@1	719 {
rlm@1	720 ELFFrameStateRegister *r = &state->registers.
rlm@1	721 regs[i];
rlm@1	722
rlm@1	723 switch (r->mode)
rlm@1	724 {
rlm@1	725 case REG_NOT_SET:
rlm@1	726 newRegs[i].I = regs[i].I;
rlm@1	727 break;
rlm@1	728 case REG_OFFSET:
rlm@1	729 newRegs[i].I = elfReadMemory(regs[state->cfaRegister].I +
rlm@1	730 state->cfaOffset +
rlm@1	731 r->offset);
rlm@1	732 break;
rlm@1	733 case REG_REGISTER:
rlm@1	734 newRegs[i].I = regs[r->reg].I;
rlm@1	735 break;
rlm@1	736 default:
rlm@1	737 printf("Unknown register mode: %d\n", r->mode);
rlm@1	738 break;
rlm@1	739 }
rlm@1	740 }
rlm@1	741 memcpy(regs, newRegs, sizeof(reg_pair)*15);
rlm@1	742 addr = newRegs[14].I;
rlm@1	743 addr &= 0xfffffffe;
rlm@1	744 address = addr;
rlm@1	745 count++;
rlm@1	746 }
rlm@1	747 else
rlm@1	748 {
rlm@1	749 printf("CFA not set\n");
rlm@1	750 break;
rlm@1	751 }
rlm@1	752 if (state->registers.previous)
rlm@1	753 {
rlm@1	754 ELFFrameStateRegisters *prev = state->registers.previous;
rlm@1	755
rlm@1	756 while (prev)
rlm@1	757 {
rlm@1	758 ELFFrameStateRegisters *p = prev->previous;
rlm@1	759 free(prev);
rlm@1	760 prev = p;
rlm@1	761 }
rlm@1	762 }
rlm@1	763 free(state);
rlm@1	764 }
rlm@1	765 }
rlm@1	766
rlm@1	767 u32 elfDecodeLocation(Function f, ELFBlock o, LocationType *type, u32 base)
rlm@1	768 {
rlm@1	769 u32 framebase = 0;
rlm@1	770 if (f && f->frameBase)
rlm@1	771 {
rlm@1	772 ELFBlock *b = f->frameBase;
rlm@1	773 switch (*b->data)
rlm@1	774 {
rlm@1	775 case DW_OP_reg0:
rlm@1	776 case DW_OP_reg1:
rlm@1	777 case DW_OP_reg2:
rlm@1	778 case DW_OP_reg3:
rlm@1	779 case DW_OP_reg4:
rlm@1	780 case DW_OP_reg5:
rlm@1	781 case DW_OP_reg6:
rlm@1	782 case DW_OP_reg7:
rlm@1	783 case DW_OP_reg8:
rlm@1	784 case DW_OP_reg9:
rlm@1	785 case DW_OP_reg10:
rlm@1	786 case DW_OP_reg11:
rlm@1	787 case DW_OP_reg12:
rlm@1	788 case DW_OP_reg13:
rlm@1	789 case DW_OP_reg14:
rlm@1	790 case DW_OP_reg15:
rlm@1	791 framebase = reg[*b->data-0x50].I;
rlm@1	792 break;
rlm@1	793 default:
rlm@1	794 fprintf(stderr, "Unknown frameBase %02x\n", *b->data);
rlm@1	795 break;
rlm@1	796 }
rlm@1	797 }
rlm@1	798
rlm@1	799 ELFBlock *loc = o;
rlm@1	800 u32 location = 0;
rlm@1	801 int bytes = 0;
rlm@1	802 if (loc)
rlm@1	803 {
rlm@1	804 switch (*loc->data)
rlm@1	805 {
rlm@1	806 case DW_OP_addr:
rlm@1	807 location = elfRead4Bytes(loc->data+1);
rlm@1	808 *type = LOCATION_memory;
rlm@1	809 break;
rlm@1	810 case DW_OP_plus_uconst:
rlm@1	811 location = base + elfReadLEB128(loc->data+1, &bytes);
rlm@1	812 *type = LOCATION_memory;
rlm@1	813 break;
rlm@1	814 case DW_OP_reg0:
rlm@1	815 case DW_OP_reg1:
rlm@1	816 case DW_OP_reg2:
rlm@1	817 case DW_OP_reg3:
rlm@1	818 case DW_OP_reg4:
rlm@1	819 case DW_OP_reg5:
rlm@1	820 case DW_OP_reg6:
rlm@1	821 case DW_OP_reg7:
rlm@1	822 case DW_OP_reg8:
rlm@1	823 case DW_OP_reg9:
rlm@1	824 case DW_OP_reg10:
rlm@1	825 case DW_OP_reg11:
rlm@1	826 case DW_OP_reg12:
rlm@1	827 case DW_OP_reg13:
rlm@1	828 case DW_OP_reg14:
rlm@1	829 case DW_OP_reg15:
rlm@1	830 location = *loc->data - 0x50;
rlm@1	831 *type = LOCATION_register;
rlm@1	832 break;
rlm@1	833 case DW_OP_fbreg:
rlm@1	834 {
rlm@1	835 int bytes;
rlm@1	836 s32 off = elfReadSignedLEB128(loc->data+1, &bytes);
rlm@1	837 location = framebase + off;
rlm@1	838 *type = LOCATION_memory;
rlm@1	839 break;
rlm@1	840 }
rlm@1	841 default:
rlm@1	842 fprintf(stderr, "Unknown location %02x\n", *loc->data);
rlm@1	843 break;
rlm@1	844 }
rlm@1	845 }
rlm@1	846 return location;
rlm@1	847 }
rlm@1	848
rlm@1	849 u32 elfDecodeLocation(Function f, ELFBlock o, LocationType *type)
rlm@1	850 {
rlm@1	851 return elfDecodeLocation(f, o, type, 0);
rlm@1	852 }
rlm@1	853
rlm@1	854 // reading function
rlm@1	855
rlm@1	856 u32 elfRead4Bytes(u8 *data)
rlm@1	857 {
rlm@1	858 u32 value = *data++;
rlm@1	859 value \|= (*data++ << 8);
rlm@1	860 value \|= (*data++ << 16);
rlm@1	861 value \|= (*data << 24);
rlm@1	862 return value;
rlm@1	863 }
rlm@1	864
rlm@1	865 u16 elfRead2Bytes(u8 *data)
rlm@1	866 {
rlm@1	867 u16 value = *data++;
rlm@1	868 value \|= (*data << 8);
rlm@1	869 return value;
rlm@1	870 }
rlm@1	871
rlm@1	872 char elfReadString(u8 data, int *bytesRead)
rlm@1	873 {
rlm@1	874 if (*data == 0)
rlm@1	875 {
rlm@1	876 *bytesRead = 1;
rlm@1	877 return NULL;
rlm@1	878 }
rlm@1	879 bytesRead = strlen((char )data) + 1;
rlm@1	880 return (char *)data;
rlm@1	881 }
rlm@1	882
rlm@1	883 s32 elfReadSignedLEB128(u8 data, int bytesRead)
rlm@1	884 {
rlm@1	885 s32 result = 0;
rlm@1	886 int shift = 0;
rlm@1	887 int count = 0;
rlm@1	888
rlm@1	889 u8 byte;
rlm@1	890 do
rlm@1	891 {
rlm@1	892 byte = *data++;
rlm@1	893 count++;
rlm@1	894 result \|= (byte & 0x7f) << shift;
rlm@1	895 shift += 7;
rlm@1	896 }
rlm@1	897 while (byte & 0x80);
rlm@1	898 if ((shift < 32) && (byte & 0x40))
rlm@1	899 result \|= -(1 << shift);
rlm@1	900 *bytesRead = count;
rlm@1	901 return result;
rlm@1	902 }
rlm@1	903
rlm@1	904 u32 elfReadLEB128(u8 data, int bytesRead)
rlm@1	905 {
rlm@1	906 u32 result = 0;
rlm@1	907 int shift = 0;
rlm@1	908 int count = 0;
rlm@1	909 u8 byte;
rlm@1	910 do
rlm@1	911 {
rlm@1	912 byte = *data++;
rlm@1	913 count++;
rlm@1	914 result \|= (byte & 0x7f) << shift;
rlm@1	915 shift += 7;
rlm@1	916 }
rlm@1	917 while (byte & 0x80);
rlm@1	918 *bytesRead = count;
rlm@1	919 return result;
rlm@1	920 }
rlm@1	921
rlm@1	922 u8 elfReadSection(u8 data, ELFSectionHeader *sh)
rlm@1	923 {
rlm@1	924 return data + READ32LE(&sh->offset);
rlm@1	925 }
rlm@1	926
rlm@1	927 ELFSectionHeader elfGetSectionByName(char name)
rlm@1	928 {
rlm@1	929 for (int i = 0; i < elfSectionHeadersCount; i++)
rlm@1	930 {
rlm@1	931 if (strcmp(name,
rlm@1	932 &elfSectionHeadersStringTable[READ32LE(&elfSectionHeaders[i]->
rlm@1	933 name)]) == 0)
rlm@1	934 {
rlm@1	935 return elfSectionHeaders[i];
rlm@1	936 }
rlm@1	937 }
rlm@1	938 return NULL;
rlm@1	939 }
rlm@1	940
rlm@1	941 ELFSectionHeader *elfGetSectionByNumber(int number)
rlm@1	942 {
rlm@1	943 if (number < elfSectionHeadersCount)
rlm@1	944 {
rlm@1	945 return elfSectionHeaders[number];
rlm@1	946 }
rlm@1	947 return NULL;
rlm@1	948 }
rlm@1	949
rlm@1	950 CompileUnit elfGetCompileUnitForData(u8 data)
rlm@1	951 {
rlm@1	952 u8 *end = elfCurrentUnit->top + 4 + elfCurrentUnit->length;
rlm@1	953
rlm@1	954 if (data >= elfCurrentUnit->top && data < end)
rlm@1	955 return elfCurrentUnit;
rlm@1	956
rlm@1	957 CompileUnit *unit = elfCompileUnits;
rlm@1	958
rlm@1	959 while (unit)
rlm@1	960 {
rlm@1	961 end = unit->top + 4 + unit->length;
rlm@1	962
rlm@1	963 if (data >= unit->top && data < end)
rlm@1	964 return unit;
rlm@1	965
rlm@1	966 unit = unit->next;
rlm@1	967 }
rlm@1	968
rlm@1	969 printf("Error: cannot find reference to compile unit at offset %08x\n",
rlm@1	970 (int)(data - elfDebugInfo->infodata));
rlm@1	971 exit(-1);
rlm@1	972 }
rlm@1	973
rlm@1	974 u8 elfReadAttribute(u8 data, ELFAttr *attr)
rlm@1	975 {
rlm@1	976 int bytes;
rlm@1	977 int form = attr->form;
rlm@1	978 start:
rlm@1	979 switch (form)
rlm@1	980 {
rlm@1	981 case DW_FORM_addr:
rlm@1	982 attr->value = elfRead4Bytes(data);
rlm@1	983 data += 4;
rlm@1	984 break;
rlm@1	985 case DW_FORM_data2:
rlm@1	986 attr->value = elfRead2Bytes(data);
rlm@1	987 data += 2;
rlm@1	988 break;
rlm@1	989 case DW_FORM_data4:
rlm@1	990 attr->value = elfRead4Bytes(data);
rlm@1	991 data += 4;
rlm@1	992 break;
rlm@1	993 case DW_FORM_string:
rlm@1	994 attr->string = (char *)data;
rlm@1	995 data += strlen(attr->string)+1;
rlm@1	996 break;
rlm@1	997 case DW_FORM_strp:
rlm@1	998 attr->string = elfDebugStrings + elfRead4Bytes(data);
rlm@1	999 data += 4;
rlm@1	1000 break;
rlm@1	1001 case DW_FORM_block:
rlm@1	1002 attr->block = (ELFBlock *)malloc(sizeof(ELFBlock));
rlm@1	1003 attr->block->length = elfReadLEB128(data, &bytes);
rlm@1	1004 data += bytes;
rlm@1	1005 attr->block->data = data;
rlm@1	1006 data += attr->block->length;
rlm@1	1007 break;
rlm@1	1008 case DW_FORM_block1:
rlm@1	1009 attr->block = (ELFBlock *)malloc(sizeof(ELFBlock));
rlm@1	1010 attr->block->length = *data++;
rlm@1	1011 attr->block->data = data;
rlm@1	1012 data += attr->block->length;
rlm@1	1013 break;
rlm@1	1014 case DW_FORM_data1:
rlm@1	1015 attr->value = *data++;
rlm@1	1016 break;
rlm@1	1017 case DW_FORM_flag:
rlm@1	1018 attr->flag = (*data++) ? true : false;
rlm@1	1019 break;
rlm@1	1020 case DW_FORM_sdata:
rlm@1	1021 attr->value = elfReadSignedLEB128(data, &bytes);
rlm@1	1022 data += bytes;
rlm@1	1023 break;
rlm@1	1024 case DW_FORM_udata:
rlm@1	1025 attr->value = elfReadLEB128(data, &bytes);
rlm@1	1026 data += bytes;
rlm@1	1027 break;
rlm@1	1028 case DW_FORM_ref_addr:
rlm@1	1029 attr->value = (elfDebugInfo->infodata + elfRead4Bytes(data)) -
rlm@1	1030 elfGetCompileUnitForData(data)->top;
rlm@1	1031 data += 4;
rlm@1	1032 break;
rlm@1	1033 case DW_FORM_ref4:
rlm@1	1034 attr->value = elfRead4Bytes(data);
rlm@1	1035 data += 4;
rlm@1	1036 break;
rlm@1	1037 case DW_FORM_ref_udata:
rlm@1	1038 attr->value = (elfDebugInfo->infodata +
rlm@1	1039 (elfGetCompileUnitForData(data)->top -
rlm@1	1040 elfDebugInfo->infodata) +
rlm@1	1041 elfReadLEB128(data, &bytes)) -
rlm@1	1042 elfCurrentUnit->top;
rlm@1	1043 data += bytes;
rlm@1	1044 break;
rlm@1	1045 case DW_FORM_indirect:
rlm@1	1046 form = elfReadLEB128(data, &bytes);
rlm@1	1047 data += bytes;
rlm@1	1048 goto start;
rlm@1	1049 default:
rlm@1	1050 fprintf(stderr, "Unsupported FORM %02x\n", form);
rlm@1	1051 exit(-1);
rlm@1	1052 }
rlm@1	1053 return data;
rlm@1	1054 }
rlm@1	1055
rlm@1	1056 ELFAbbrev elfGetAbbrev(ELFAbbrev *table, u32 number)
rlm@1	1057 {
rlm@1	1058 int hash = number % 121;
rlm@1	1059
rlm@1	1060 ELFAbbrev *abbrev = table[hash];
rlm@1	1061
rlm@1	1062 while (abbrev)
rlm@1	1063 {
rlm@1	1064 if (abbrev->number == number)
rlm@1	1065 return abbrev;
rlm@1	1066 abbrev = abbrev->next;
rlm@1	1067 }
rlm@1	1068 return NULL;
rlm@1	1069 }
rlm@1	1070
rlm@1	1071 ELFAbbrev * elfReadAbbrevs(u8 data, u32 offset)
rlm@1	1072 {
rlm@1	1073 data += offset;
rlm@1	1074 ELFAbbrev *abbrevs = (ELFAbbrev )calloc(sizeof(ELFAbbrev )*121, 1);
rlm@1	1075 int bytes = 0;
rlm@1	1076 u32 number = elfReadLEB128(data, &bytes);
rlm@1	1077 data += bytes;
rlm@1	1078 while (number)
rlm@1	1079 {
rlm@1	1080 ELFAbbrev abbrev = (ELFAbbrev )calloc(sizeof(ELFAbbrev), 1);
rlm@1	1081
rlm@1	1082 // read tag information
rlm@1	1083 abbrev->number = number;
rlm@1	1084 abbrev->tag = elfReadLEB128(data, &bytes);
rlm@1	1085 data += bytes;
rlm@1	1086 abbrev->hasChildren = *data++ ? true : false;
rlm@1	1087
rlm@1	1088 // read attributes
rlm@1	1089 int name = elfReadLEB128(data, &bytes);
rlm@1	1090 data += bytes;
rlm@1	1091 int form = elfReadLEB128(data, &bytes);
rlm@1	1092 data += bytes;
rlm@1	1093
rlm@1	1094 while (name)
rlm@1	1095 {
rlm@1	1096 if ((abbrev->numAttrs % 4) == 0)
rlm@1	1097 {
rlm@1	1098 abbrev->attrs = (ELFAttr *)realloc(abbrev->attrs,
rlm@1	1099 (abbrev->numAttrs + 4) *
rlm@1	1100 sizeof(ELFAttr));
rlm@1	1101 }
rlm@1	1102 abbrev->attrs[abbrev->numAttrs].name = name;
rlm@1	1103 abbrev->attrs[abbrev->numAttrs++].form = form;
rlm@1	1104
rlm@1	1105 name = elfReadLEB128(data, &bytes);
rlm@1	1106 data += bytes;
rlm@1	1107 form = elfReadLEB128(data, &bytes);
rlm@1	1108 data += bytes;
rlm@1	1109 }
rlm@1	1110
rlm@1	1111 int hash = number % 121;
rlm@1	1112 abbrev->next = abbrevs[hash];
rlm@1	1113 abbrevs[hash] = abbrev;
rlm@1	1114
rlm@1	1115 number = elfReadLEB128(data, &bytes);
rlm@1	1116 data += bytes;
rlm@1	1117
rlm@1	1118 if (elfGetAbbrev(abbrevs, number) != NULL)
rlm@1	1119 break;
rlm@1	1120 }
rlm@1	1121
rlm@1	1122 return abbrevs;
rlm@1	1123 }
rlm@1	1124
rlm@1	1125 void elfParseCFA(u8 *top)
rlm@1	1126 {
rlm@1	1127 ELFSectionHeader *h = elfGetSectionByName(".debug_frame");
rlm@1	1128
rlm@1	1129 if (h == NULL)
rlm@1	1130 {
rlm@1	1131 return;
rlm@1	1132 }
rlm@1	1133
rlm@1	1134 u8 *data = elfReadSection(top, h);
rlm@1	1135
rlm@1	1136 u8 *topOffset = data;
rlm@1	1137
rlm@1	1138 u8 *end = data + READ32LE(&h->size);
rlm@1	1139
rlm@1	1140 ELFcie *cies = NULL;
rlm@1	1141
rlm@1	1142 while (data < end)
rlm@1	1143 {
rlm@1	1144 u32 offset = data - topOffset;
rlm@1	1145 u32 len = elfRead4Bytes(data);
rlm@1	1146 data += 4;
rlm@1	1147
rlm@1	1148 u8 *dataEnd = data + len;
rlm@1	1149
rlm@1	1150 u32 id = elfRead4Bytes(data);
rlm@1	1151 data += 4;
rlm@1	1152
rlm@1	1153 if (id == 0xffffffff)
rlm@1	1154 {
rlm@1	1155 // skip version
rlm@1	1156 *data++;
rlm@1	1157
rlm@1	1158 ELFcie cie = (ELFcie )calloc(1, sizeof(ELFcie));
rlm@1	1159
rlm@1	1160 cie->next = cies;
rlm@1	1161 cies = cie;
rlm@1	1162
rlm@1	1163 cie->offset = offset;
rlm@1	1164
rlm@1	1165 cie->augmentation = data;
rlm@1	1166 while (*data)
rlm@1	1167 data++;
rlm@1	1168 data++;
rlm@1	1169
rlm@1	1170 if (*cie->augmentation)
rlm@1	1171 {
rlm@1	1172 fprintf(stderr, "Error: augmentation not supported\n");
rlm@1	1173 exit(-1);
rlm@1	1174 }
rlm@1	1175
rlm@1	1176 int bytes;
rlm@1	1177 cie->codeAlign = elfReadLEB128(data, &bytes);
rlm@1	1178 data += bytes;
rlm@1	1179
rlm@1	1180 cie->dataAlign = elfReadSignedLEB128(data, &bytes);
rlm@1	1181 data += bytes;
rlm@1	1182
rlm@1	1183 cie->returnAddress = *data++;
rlm@1	1184
rlm@1	1185 cie->data = data;
rlm@1	1186 cie->dataLen = dataEnd - data;
rlm@1	1187 }
rlm@1	1188 else
rlm@1	1189 {
rlm@1	1190 ELFfde fde = (ELFfde )calloc(1, sizeof(ELFfde));
rlm@1	1191
rlm@1	1192 ELFcie *cie = cies;
rlm@1	1193
rlm@1	1194 while (cie != NULL)
rlm@1	1195 {
rlm@1	1196 if (cie->offset == id)
rlm@1	1197 break;
rlm@1	1198 cie = cie->next;
rlm@1	1199 }
rlm@1	1200
rlm@1	1201 if (!cie)
rlm@1	1202 {
rlm@1	1203 fprintf(stderr, "Cannot find CIE %08x\n", id);
rlm@1	1204 exit(-1);
rlm@1	1205 }
rlm@1	1206
rlm@1	1207 fde->cie = cie;
rlm@1	1208
rlm@1	1209 fde->address = elfRead4Bytes(data);
rlm@1	1210 data += 4;
rlm@1	1211
rlm@1	1212 fde->end = fde->address + elfRead4Bytes(data);
rlm@1	1213 data += 4;
rlm@1	1214
rlm@1	1215 fde->data = data;
rlm@1	1216 fde->dataLen = dataEnd - data;
rlm@1	1217
rlm@1	1218 if ((elfFdeCount %10) == 0)
rlm@1	1219 {
rlm@1	1220 elfFdes = (ELFfde * )realloc(elfFdes, (elfFdeCount+10)
rlm@1	1221 sizeof(ELFfde *));
rlm@1	1222 }
rlm@1	1223 elfFdes[elfFdeCount++] = fde;
rlm@1	1224 }
rlm@1	1225 data = dataEnd;
rlm@1	1226 }
rlm@1	1227
rlm@1	1228 elfCies = cies;
rlm@1	1229 }
rlm@1	1230
rlm@1	1231 void elfAddLine(LineInfo l, u32 a, int file, int line, int max)
rlm@1	1232 {
rlm@1	1233 if (l->number == *max)
rlm@1	1234 {
rlm@1	1235 *max += 1000;
rlm@1	1236 l->lines = (LineInfoItem )realloc(l->lines, max*sizeof(LineInfoItem));
rlm@1	1237 }
rlm@1	1238 LineInfoItem *li = &l->lines[l->number];
rlm@1	1239 li->file = l->files[file-1];
rlm@1	1240 li->address = a;
rlm@1	1241 li->line = line;
rlm@1	1242 l->number++;
rlm@1	1243 }
rlm@1	1244
rlm@1	1245 void elfParseLineInfo(CompileUnit unit, u8 top)
rlm@1	1246 {
rlm@1	1247 ELFSectionHeader *h = elfGetSectionByName(".debug_line");
rlm@1	1248 if (h == NULL)
rlm@1	1249 {
rlm@1	1250 fprintf(stderr, "No line information found\n");
rlm@1	1251 return;
rlm@1	1252 }
rlm@1	1253 LineInfo l = unit->lineInfoTable = (LineInfo )calloc(1, sizeof(LineInfo));
rlm@1	1254 l->number = 0;
rlm@1	1255 int max = 1000;
rlm@1	1256 l->lines = (LineInfoItem )malloc(1000sizeof(LineInfoItem));
rlm@1	1257
rlm@1	1258 u8 *data = elfReadSection(top, h);
rlm@1	1259 data += unit->lineInfo;
rlm@1	1260 u32 totalLen = elfRead4Bytes(data);
rlm@1	1261 data += 4;
rlm@1	1262 u8 *end = data + totalLen;
rlm@1	1263 // u16 version = elfRead2Bytes(data);
rlm@1	1264 data += 2;
rlm@1	1265 // u32 offset = elfRead4Bytes(data);
rlm@1	1266 data += 4;
rlm@1	1267 int minInstrSize = *data++;
rlm@1	1268 int defaultIsStmt = *data++;
rlm@1	1269 int lineBase = (s8)*data++;
rlm@1	1270 int lineRange = *data++;
rlm@1	1271 int opcodeBase = *data++;
rlm@1	1272 u8 stdOpLen = (u8 )malloc(opcodeBase * sizeof(u8));
rlm@1	1273 stdOpLen[0] = 1;
rlm@1	1274 int i;
rlm@1	1275 for (i = 1; i < opcodeBase; i++)
rlm@1	1276 stdOpLen[i] = *data++;
rlm@1	1277
rlm@1	1278 free(stdOpLen); // todo
rlm@1	1279 int bytes = 0;
rlm@1	1280
rlm@1	1281 char *s;
rlm@1	1282 while ((s = elfReadString(data, &bytes)) != NULL)
rlm@1	1283 {
rlm@1	1284 data += bytes;
rlm@1	1285 // fprintf(stderr, "Directory is %s\n", s);
rlm@1	1286 }
rlm@1	1287 data += bytes;
rlm@1	1288 int count = 4;
rlm@1	1289 int index = 0;
rlm@1	1290 l->files = (char * )malloc(sizeof(char )*count);
rlm@1	1291
rlm@1	1292 while ((s = elfReadString(data, &bytes)) != NULL)
rlm@1	1293 {
rlm@1	1294 l->files[index++] = s;
rlm@1	1295
rlm@1	1296 data += bytes;
rlm@1	1297 // directory
rlm@1	1298 elfReadLEB128(data, &bytes);
rlm@1	1299 data += bytes;
rlm@1	1300 // time
rlm@1	1301 elfReadLEB128(data, &bytes);
rlm@1	1302 data += bytes;
rlm@1	1303 // size
rlm@1	1304 elfReadLEB128(data, &bytes);
rlm@1	1305 data += bytes;
rlm@1	1306 // fprintf(stderr, "File is %s\n", s);
rlm@1	1307 if (index == count)
rlm@1	1308 {
rlm@1	1309 count += 4;
rlm@1	1310 l->files = (char * )realloc(l->files, sizeof(char )*count);
rlm@1	1311 }
rlm@1	1312 }
rlm@1	1313 l->fileCount = index;
rlm@1	1314 data += bytes;
rlm@1	1315
rlm@1	1316 while (data < end)
rlm@1	1317 {
rlm@1	1318 u32 address = 0;
rlm@1	1319 int file = 1;
rlm@1	1320 int line = 1;
rlm@1	1321 int col = 0;
rlm@1	1322 int isStmt = defaultIsStmt;
rlm@1	1323 int basicBlock = 0;
rlm@1	1324 int endSeq = 0;
rlm@1	1325
rlm@1	1326 while (!endSeq)
rlm@1	1327 {
rlm@1	1328 int op = *data++;
rlm@1	1329 switch (op)
rlm@1	1330 {
rlm@1	1331 case DW_LNS_extended_op:
rlm@1	1332 {
rlm@1	1333 data++;
rlm@1	1334 op = *data++;
rlm@1	1335 switch (op)
rlm@1	1336 {
rlm@1	1337 case DW_LNE_end_sequence:
rlm@1	1338 endSeq = 1;
rlm@1	1339 break;
rlm@1	1340 case DW_LNE_set_address:
rlm@1	1341 address = elfRead4Bytes(data);
rlm@1	1342 data += 4;
rlm@1	1343 break;
rlm@1	1344 default:
rlm@1	1345 fprintf(stderr, "Unknown extended LINE opcode %02x\n", op);
rlm@1	1346 exit(-1);
rlm@1	1347 }
rlm@1	1348 break;
rlm@1	1349 }
rlm@1	1350 case DW_LNS_copy:
rlm@1	1351 // fprintf(stderr, "Address %08x line %d (%d)\n", address, line, file);
rlm@1	1352 elfAddLine(l, address, file, line, &max);
rlm@1	1353 basicBlock = 0;
rlm@1	1354 break;
rlm@1	1355 case DW_LNS_advance_pc:
rlm@1	1356 address += minInstrSize * elfReadLEB128(data, &bytes);
rlm@1	1357 data += bytes;
rlm@1	1358 break;
rlm@1	1359 case DW_LNS_advance_line:
rlm@1	1360 line += elfReadSignedLEB128(data, &bytes);
rlm@1	1361 data += bytes;
rlm@1	1362 break;
rlm@1	1363 case DW_LNS_set_file:
rlm@1	1364 file = elfReadLEB128(data, &bytes);
rlm@1	1365 data += bytes;
rlm@1	1366 break;
rlm@1	1367 case DW_LNS_set_column:
rlm@1	1368 col = elfReadLEB128(data, &bytes);
rlm@1	1369 data += bytes;
rlm@1	1370 break;
rlm@1	1371 case DW_LNS_negate_stmt:
rlm@1	1372 isStmt = !isStmt;
rlm@1	1373 break;
rlm@1	1374 case DW_LNS_set_basic_block:
rlm@1	1375 basicBlock = 1;
rlm@1	1376 break;
rlm@1	1377 case DW_LNS_const_add_pc:
rlm@1	1378 address += (minInstrSize *((255 - opcodeBase)/lineRange));
rlm@1	1379 break;
rlm@1	1380 case DW_LNS_fixed_advance_pc:
rlm@1	1381 address += elfRead2Bytes(data);
rlm@1	1382 data += 2;
rlm@1	1383 break;
rlm@1	1384 default:
rlm@1	1385 op = op - opcodeBase;
rlm@1	1386 address += (op / lineRange) * minInstrSize;
rlm@1	1387 line += lineBase + (op % lineRange);
rlm@1	1388 elfAddLine(l, address, file, line, &max);
rlm@1	1389 // fprintf(stderr, "Address %08x line %d (%d)\n", address, line,file);
rlm@1	1390 basicBlock = 1;
rlm@1	1391 break;
rlm@1	1392 }
rlm@1	1393 }
rlm@1	1394 }
rlm@1	1395 l->lines = (LineInfoItem )realloc(l->lines, l->numbersizeof(LineInfoItem));
rlm@1	1396 }
rlm@1	1397
rlm@1	1398 u8 elfSkipData(u8 data, ELFAbbrev abbrev, ELFAbbrev *abbrevs)
rlm@1	1399 {
rlm@1	1400 int i;
rlm@1	1401 int bytes;
rlm@1	1402
rlm@1	1403 for (i = 0; i < abbrev->numAttrs; i++)
rlm@1	1404 {
rlm@1	1405 data = elfReadAttribute(data, &abbrev->attrs[i]);
rlm@1	1406 if (abbrev->attrs[i].form == DW_FORM_block1)
rlm@1	1407 free(abbrev->attrs[i].block);
rlm@1	1408 }
rlm@1	1409
rlm@1	1410 if (abbrev->hasChildren)
rlm@1	1411 {
rlm@1	1412 int nesting = 1;
rlm@1	1413 while (nesting)
rlm@1	1414 {
rlm@1	1415 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	1416 data += bytes;
rlm@1	1417
rlm@1	1418 if (!abbrevNum)
rlm@1	1419 {
rlm@1	1420 nesting--;
rlm@1	1421 continue;
rlm@1	1422 }
rlm@1	1423
rlm@1	1424 abbrev = elfGetAbbrev(abbrevs, abbrevNum);
rlm@1	1425
rlm@1	1426 for (i = 0; i < abbrev->numAttrs; i++)
rlm@1	1427 {
rlm@1	1428 data = elfReadAttribute(data, &abbrev->attrs[i]);
rlm@1	1429 if (abbrev->attrs[i].form == DW_FORM_block1)
rlm@1	1430 free(abbrev->attrs[i].block);
rlm@1	1431 }
rlm@1	1432
rlm@1	1433 if (abbrev->hasChildren)
rlm@1	1434 {
rlm@1	1435 nesting++;
rlm@1	1436 }
rlm@1	1437 }
rlm@1	1438 }
rlm@1	1439 return data;
rlm@1	1440 }
rlm@1	1441
rlm@1	1442 Type elfParseType(CompileUnit unit, u32);
rlm@1	1443 u8 elfParseObject(u8 data, ELFAbbrev abbrev, CompileUnit unit,
rlm@1	1444 Object **object);
rlm@1	1445 u8 elfParseFunction(u8 data, ELFAbbrev abbrev, CompileUnit unit,
rlm@1	1446 Function **function);
rlm@1	1447 void elfCleanUp(Function *);
rlm@1	1448
rlm@1	1449 void elfAddType(Type type, CompileUnit unit, u32 offset)
rlm@1	1450 {
rlm@1	1451 if (type->next == NULL)
rlm@1	1452 {
rlm@1	1453 if (unit->types != type && type->offset == 0)
rlm@1	1454 {
rlm@1	1455 type->offset = offset;
rlm@1	1456 type->next = unit->types;
rlm@1	1457 unit->types = type;
rlm@1	1458 }
rlm@1	1459 }
rlm@1	1460 }
rlm@1	1461
rlm@1	1462 void elfParseType(u8 data, u32 offset, ELFAbbrev abbrev, CompileUnit *unit,
rlm@1	1463 Type **type)
rlm@1	1464 {
rlm@1	1465 switch (abbrev->tag)
rlm@1	1466 {
rlm@1	1467 case DW_TAG_typedef:
rlm@1	1468 {
rlm@1	1469 u32 typeref = 0;
rlm@1	1470 char *name = NULL;
rlm@1	1471 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1472 {
rlm@1	1473 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1474 data = elfReadAttribute(data, attr);
rlm@1	1475 switch (attr->name)
rlm@1	1476 {
rlm@1	1477 case DW_AT_name:
rlm@1	1478 name = attr->string;
rlm@1	1479 break;
rlm@1	1480 case DW_AT_type:
rlm@1	1481 typeref = attr->value;
rlm@1	1482 break;
rlm@1	1483 case DW_AT_decl_file:
rlm@1	1484 case DW_AT_decl_line:
rlm@1	1485 break;
rlm@1	1486 default:
rlm@1	1487 fprintf(stderr, "Unknown attribute for typedef %02x\n", attr->name);
rlm@1	1488 break;
rlm@1	1489 }
rlm@1	1490 }
rlm@1	1491 if (abbrev->hasChildren)
rlm@1	1492 fprintf(stderr, "Unexpected children for typedef\n");
rlm@1	1493 *type = elfParseType(unit, typeref);
rlm@1	1494 if (name)
rlm@1	1495 (*type)->name = name;
rlm@1	1496 return;
rlm@1	1497 break;
rlm@1	1498 }
rlm@1	1499 case DW_TAG_union_type:
rlm@1	1500 case DW_TAG_structure_type:
rlm@1	1501 {
rlm@1	1502 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	1503 if (abbrev->tag == DW_TAG_structure_type)
rlm@1	1504 t->type = TYPE_struct;
rlm@1	1505 else
rlm@1	1506 t->type = TYPE_union;
rlm@1	1507
rlm@1	1508 Struct s = (Struct )calloc(sizeof(Struct), 1);
rlm@1	1509 t->structure = s;
rlm@1	1510 elfAddType(t, unit, offset);
rlm@1	1511
rlm@1	1512 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1513 {
rlm@1	1514 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1515 data = elfReadAttribute(data, attr);
rlm@1	1516 switch (attr->name)
rlm@1	1517 {
rlm@1	1518 case DW_AT_name:
rlm@1	1519 t->name = attr->string;
rlm@1	1520 break;
rlm@1	1521 case DW_AT_byte_size:
rlm@1	1522 t->size = attr->value;
rlm@1	1523 break;
rlm@1	1524 case DW_AT_decl_file:
rlm@1	1525 case DW_AT_decl_line:
rlm@1	1526 case DW_AT_sibling:
rlm@1	1527 case DW_AT_containing_type: // todo?
rlm@1	1528 case DW_AT_declaration:
rlm@1	1529 case DW_AT_specification: // TODO:
rlm@1	1530 break;
rlm@1	1531 default:
rlm@1	1532 fprintf(stderr, "Unknown attribute for struct %02x\n", attr->name);
rlm@1	1533 break;
rlm@1	1534 }
rlm@1	1535 }
rlm@1	1536 if (abbrev->hasChildren)
rlm@1	1537 {
rlm@1	1538 int bytes;
rlm@1	1539 u32 num = elfReadLEB128(data, &bytes);
rlm@1	1540 data += bytes;
rlm@1	1541 int index = 0;
rlm@1	1542 while (num)
rlm@1	1543 {
rlm@1	1544 ELFAbbrev *abbr = elfGetAbbrev(unit->abbrevs, num);
rlm@1	1545
rlm@1	1546 switch (abbr->tag)
rlm@1	1547 {
rlm@1	1548 case DW_TAG_member:
rlm@1	1549 {
rlm@1	1550 if ((index % 4) == 0)
rlm@1	1551 s->members = (Member *)realloc(s->members,
rlm@1	1552 sizeof(Member)*(index+4));
rlm@1	1553 Member *m = &s->members[index];
rlm@1	1554 m->location = NULL;
rlm@1	1555 m->bitOffset = 0;
rlm@1	1556 m->bitSize = 0;
rlm@1	1557 m->byteSize = 0;
rlm@1	1558 for (int i = 0; i < abbr->numAttrs; i++)
rlm@1	1559 {
rlm@1	1560 ELFAttr *attr = &abbr->attrs[i];
rlm@1	1561 data = elfReadAttribute(data, attr);
rlm@1	1562 switch (attr->name)
rlm@1	1563 {
rlm@1	1564 case DW_AT_name:
rlm@1	1565 m->name = attr->string;
rlm@1	1566 break;
rlm@1	1567 case DW_AT_type:
rlm@1	1568 m->type = elfParseType(unit, attr->value);
rlm@1	1569 break;
rlm@1	1570 case DW_AT_data_member_location:
rlm@1	1571 m->location = attr->block;
rlm@1	1572 break;
rlm@1	1573 case DW_AT_byte_size:
rlm@1	1574 m->byteSize = attr->value;
rlm@1	1575 break;
rlm@1	1576 case DW_AT_bit_offset:
rlm@1	1577 m->bitOffset = attr->value;
rlm@1	1578 break;
rlm@1	1579 case DW_AT_bit_size:
rlm@1	1580 m->bitSize = attr->value;
rlm@1	1581 break;
rlm@1	1582 case DW_AT_decl_file:
rlm@1	1583 case DW_AT_decl_line:
rlm@1	1584 case DW_AT_accessibility:
rlm@1	1585 case DW_AT_artificial: // todo?
rlm@1	1586 break;
rlm@1	1587 default:
rlm@1	1588 fprintf(stderr, "Unknown member attribute %02x\n",
rlm@1	1589 attr->name);
rlm@1	1590 }
rlm@1	1591 }
rlm@1	1592 index++;
rlm@1	1593 break;
rlm@1	1594 }
rlm@1	1595 case DW_TAG_subprogram:
rlm@1	1596 {
rlm@1	1597 Function *fnc = NULL;
rlm@1	1598 data = elfParseFunction(data, abbr, unit, &fnc);
rlm@1	1599 if (fnc != NULL)
rlm@1	1600 {
rlm@1	1601 if (unit->lastFunction)
rlm@1	1602 unit->lastFunction->next = fnc;
rlm@1	1603 else
rlm@1	1604 unit->functions = fnc;
rlm@1	1605 unit->lastFunction = fnc;
rlm@1	1606 }
rlm@1	1607 break;
rlm@1	1608 }
rlm@1	1609 case DW_TAG_inheritance:
rlm@1	1610 // TODO: add support
rlm@1	1611 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1612 break;
rlm@1	1613 CASE_TYPE_TAG:
rlm@1	1614 // skip types... parsed only when used
rlm@1	1615 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1616 break;
rlm@1	1617 case DW_TAG_variable:
rlm@1	1618 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1619 break;
rlm@1	1620 default:
rlm@1	1621 fprintf(stderr, "Unknown struct tag %02x %s\n", abbr->tag, t->name);
rlm@1	1622 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1623 break;
rlm@1	1624 }
rlm@1	1625 num = elfReadLEB128(data, &bytes);
rlm@1	1626 data += bytes;
rlm@1	1627 }
rlm@1	1628 s->memberCount = index;
rlm@1	1629 }
rlm@1	1630 *type = t;
rlm@1	1631 return;
rlm@1	1632 break;
rlm@1	1633 }
rlm@1	1634 case DW_TAG_base_type:
rlm@1	1635 {
rlm@1	1636 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	1637
rlm@1	1638 t->type = TYPE_base;
rlm@1	1639 elfAddType(t, unit, offset);
rlm@1	1640 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1641 {
rlm@1	1642 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1643 data = elfReadAttribute(data, attr);
rlm@1	1644 switch (attr->name)
rlm@1	1645 {
rlm@1	1646 case DW_AT_name:
rlm@1	1647 t->name = attr->string;
rlm@1	1648 break;
rlm@1	1649 case DW_AT_encoding:
rlm@1	1650 t->encoding = attr->value;
rlm@1	1651 break;
rlm@1	1652 case DW_AT_byte_size:
rlm@1	1653 t->size = attr->value;
rlm@1	1654 break;
rlm@1	1655 case DW_AT_bit_size:
rlm@1	1656 t->bitSize = attr->value;
rlm@1	1657 break;
rlm@1	1658 default:
rlm@1	1659 fprintf(stderr, "Unknown attribute for base type %02x\n",
rlm@1	1660 attr->name);
rlm@1	1661 break;
rlm@1	1662 }
rlm@1	1663 }
rlm@1	1664 if (abbrev->hasChildren)
rlm@1	1665 fprintf(stderr, "Unexpected children for base type\n");
rlm@1	1666 *type = t;
rlm@1	1667 return;
rlm@1	1668 break;
rlm@1	1669 }
rlm@1	1670 case DW_TAG_pointer_type:
rlm@1	1671 {
rlm@1	1672 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	1673
rlm@1	1674 t->type = TYPE_pointer;
rlm@1	1675
rlm@1	1676 elfAddType(t, unit, offset);
rlm@1	1677
rlm@1	1678 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1679 {
rlm@1	1680 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1681 data = elfReadAttribute(data, attr);
rlm@1	1682 switch (attr->name)
rlm@1	1683 {
rlm@1	1684 case DW_AT_type:
rlm@1	1685 t->pointer = elfParseType(unit, attr->value);
rlm@1	1686 break;
rlm@1	1687 case DW_AT_byte_size:
rlm@1	1688 t->size = attr->value;
rlm@1	1689 break;
rlm@1	1690 default:
rlm@1	1691 fprintf(stderr, "Unknown pointer type attribute %02x\n", attr->name);
rlm@1	1692 break;
rlm@1	1693 }
rlm@1	1694 }
rlm@1	1695 if (abbrev->hasChildren)
rlm@1	1696 fprintf(stderr, "Unexpected children for pointer type\n");
rlm@1	1697 *type = t;
rlm@1	1698 return;
rlm@1	1699 break;
rlm@1	1700 }
rlm@1	1701 case DW_TAG_reference_type:
rlm@1	1702 {
rlm@1	1703 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	1704
rlm@1	1705 t->type = TYPE_reference;
rlm@1	1706
rlm@1	1707 elfAddType(t, unit, offset);
rlm@1	1708
rlm@1	1709 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1710 {
rlm@1	1711 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1712 data = elfReadAttribute(data, attr);
rlm@1	1713 switch (attr->name)
rlm@1	1714 {
rlm@1	1715 case DW_AT_type:
rlm@1	1716 t->pointer = elfParseType(unit, attr->value);
rlm@1	1717 break;
rlm@1	1718 case DW_AT_byte_size:
rlm@1	1719 t->size = attr->value;
rlm@1	1720 break;
rlm@1	1721 default:
rlm@1	1722 fprintf(stderr, "Unknown ref type attribute %02x\n", attr->name);
rlm@1	1723 break;
rlm@1	1724 }
rlm@1	1725 }
rlm@1	1726 if (abbrev->hasChildren)
rlm@1	1727 fprintf(stderr, "Unexpected children for ref type\n");
rlm@1	1728 *type = t;
rlm@1	1729 return;
rlm@1	1730 break;
rlm@1	1731 }
rlm@1	1732 case DW_TAG_volatile_type:
rlm@1	1733 {
rlm@1	1734 u32 typeref = 0;
rlm@1	1735
rlm@1	1736 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1737 {
rlm@1	1738 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1739 data = elfReadAttribute(data, attr);
rlm@1	1740 switch (attr->name)
rlm@1	1741 {
rlm@1	1742 case DW_AT_type:
rlm@1	1743 typeref = attr->value;
rlm@1	1744 break;
rlm@1	1745 default:
rlm@1	1746 fprintf(stderr, "Unknown volatile attribute for type %02x\n",
rlm@1	1747 attr->name);
rlm@1	1748 break;
rlm@1	1749 }
rlm@1	1750 }
rlm@1	1751 if (abbrev->hasChildren)
rlm@1	1752 fprintf(stderr, "Unexpected children for volatile type\n");
rlm@1	1753 *type = elfParseType(unit, typeref);
rlm@1	1754 return;
rlm@1	1755 break;
rlm@1	1756 }
rlm@1	1757 case DW_TAG_const_type:
rlm@1	1758 {
rlm@1	1759 u32 typeref = 0;
rlm@1	1760
rlm@1	1761 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1762 {
rlm@1	1763 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1764 data = elfReadAttribute(data, attr);
rlm@1	1765 switch (attr->name)
rlm@1	1766 {
rlm@1	1767 case DW_AT_type:
rlm@1	1768 typeref = attr->value;
rlm@1	1769 break;
rlm@1	1770 default:
rlm@1	1771 fprintf(stderr, "Unknown const attribute for type %02x\n",
rlm@1	1772 attr->name);
rlm@1	1773 break;
rlm@1	1774 }
rlm@1	1775 }
rlm@1	1776 if (abbrev->hasChildren)
rlm@1	1777 fprintf(stderr, "Unexpected children for const type\n");
rlm@1	1778 *type = elfParseType(unit, typeref);
rlm@1	1779 return;
rlm@1	1780 break;
rlm@1	1781 }
rlm@1	1782 case DW_TAG_enumeration_type:
rlm@1	1783 {
rlm@1	1784 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	1785 t->type = TYPE_enum;
rlm@1	1786 Enum e = (Enum )calloc(sizeof(Enum), 1);
rlm@1	1787 t->enumeration = e;
rlm@1	1788 elfAddType(t, unit, offset);
rlm@1	1789 int count = 0;
rlm@1	1790 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1791 {
rlm@1	1792 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1793 data = elfReadAttribute(data, attr);
rlm@1	1794 switch (attr->name)
rlm@1	1795 {
rlm@1	1796 case DW_AT_name:
rlm@1	1797 t->name = attr->string;
rlm@1	1798 break;
rlm@1	1799 case DW_AT_byte_size:
rlm@1	1800 t->size = attr->value;
rlm@1	1801 break;
rlm@1	1802 case DW_AT_sibling:
rlm@1	1803 case DW_AT_decl_file:
rlm@1	1804 case DW_AT_decl_line:
rlm@1	1805 break;
rlm@1	1806 default:
rlm@1	1807 fprintf(stderr, "Unknown enum attribute %02x\n", attr->name);
rlm@1	1808 }
rlm@1	1809 }
rlm@1	1810 if (abbrev->hasChildren)
rlm@1	1811 {
rlm@1	1812 int bytes;
rlm@1	1813 u32 num = elfReadLEB128(data, &bytes);
rlm@1	1814 data += bytes;
rlm@1	1815 while (num)
rlm@1	1816 {
rlm@1	1817 ELFAbbrev *abbr = elfGetAbbrev(unit->abbrevs, num);
rlm@1	1818
rlm@1	1819 switch (abbr->tag)
rlm@1	1820 {
rlm@1	1821 case DW_TAG_enumerator:
rlm@1	1822 {
rlm@1	1823 count++;
rlm@1	1824 e->members = (EnumMember *)realloc(e->members,
rlm@1	1825 count*sizeof(EnumMember));
rlm@1	1826 EnumMember *m = &e->members[count-1];
rlm@1	1827 for (int i = 0; i < abbr->numAttrs; i++)
rlm@1	1828 {
rlm@1	1829 ELFAttr *attr = &abbr->attrs[i];
rlm@1	1830 data = elfReadAttribute(data, attr);
rlm@1	1831 switch (attr->name)
rlm@1	1832 {
rlm@1	1833 case DW_AT_name:
rlm@1	1834 m->name = attr->string;
rlm@1	1835 break;
rlm@1	1836 case DW_AT_const_value:
rlm@1	1837 m->value = attr->value;
rlm@1	1838 break;
rlm@1	1839 default:
rlm@1	1840 fprintf(stderr, "Unknown sub param attribute %02x\n",
rlm@1	1841 attr->name);
rlm@1	1842 }
rlm@1	1843 }
rlm@1	1844 break;
rlm@1	1845 }
rlm@1	1846 default:
rlm@1	1847 fprintf(stderr, "Unknown enum tag %02x\n", abbr->tag);
rlm@1	1848 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1849 break;
rlm@1	1850 }
rlm@1	1851 num = elfReadLEB128(data, &bytes);
rlm@1	1852 data += bytes;
rlm@1	1853 }
rlm@1	1854 }
rlm@1	1855 e->count = count;
rlm@1	1856 *type = t;
rlm@1	1857 return;
rlm@1	1858 break;
rlm@1	1859 }
rlm@1	1860 case DW_TAG_subroutine_type:
rlm@1	1861 {
rlm@1	1862 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	1863 t->type = TYPE_function;
rlm@1	1864 FunctionType f = (FunctionType )calloc(sizeof(FunctionType), 1);
rlm@1	1865 t->function = f;
rlm@1	1866 elfAddType(t, unit, offset);
rlm@1	1867 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	1868 {
rlm@1	1869 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1870 data = elfReadAttribute(data, attr);
rlm@1	1871 switch (attr->name)
rlm@1	1872 {
rlm@1	1873 case DW_AT_prototyped:
rlm@1	1874 case DW_AT_sibling:
rlm@1	1875 break;
rlm@1	1876 case DW_AT_type:
rlm@1	1877 f->returnType = elfParseType(unit, attr->value);
rlm@1	1878 break;
rlm@1	1879 default:
rlm@1	1880 fprintf(stderr, "Unknown subroutine attribute %02x\n", attr->name);
rlm@1	1881 }
rlm@1	1882 }
rlm@1	1883 if (abbrev->hasChildren)
rlm@1	1884 {
rlm@1	1885 int bytes;
rlm@1	1886 u32 num = elfReadLEB128(data, &bytes);
rlm@1	1887 data += bytes;
rlm@1	1888 Object *lastVar = NULL;
rlm@1	1889 while (num)
rlm@1	1890 {
rlm@1	1891 ELFAbbrev *abbr = elfGetAbbrev(unit->abbrevs, num);
rlm@1	1892
rlm@1	1893 switch (abbr->tag)
rlm@1	1894 {
rlm@1	1895 case DW_TAG_formal_parameter:
rlm@1	1896 {
rlm@1	1897 Object *o;
rlm@1	1898 data = elfParseObject(data, abbr, unit, &o);
rlm@1	1899 if (f->args)
rlm@1	1900 lastVar->next = o;
rlm@1	1901 else
rlm@1	1902 f->args = o;
rlm@1	1903 lastVar = o;
rlm@1	1904 break;
rlm@1	1905 }
rlm@1	1906 case DW_TAG_unspecified_parameters:
rlm@1	1907 // no use in the debugger yet
rlm@1	1908 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1909 break;
rlm@1	1910 CASE_TYPE_TAG:
rlm@1	1911 // skip types... parsed only when used
rlm@1	1912 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1913 break;
rlm@1	1914 default:
rlm@1	1915 fprintf(stderr, "Unknown subroutine tag %02x\n", abbr->tag);
rlm@1	1916 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1917 break;
rlm@1	1918 }
rlm@1	1919 num = elfReadLEB128(data, &bytes);
rlm@1	1920 data += bytes;
rlm@1	1921 }
rlm@1	1922 }
rlm@1	1923 *type = t;
rlm@1	1924 return;
rlm@1	1925 break;
rlm@1	1926 }
rlm@1	1927 case DW_TAG_array_type:
rlm@1	1928 {
rlm@1	1929 u32 typeref = 0;
rlm@1	1930 int i;
rlm@1	1931 Array array = (Array )calloc(sizeof(Array), 1);
rlm@1	1932 Type * t = (Type *)calloc(sizeof(Type), 1);
rlm@1	1933 t->type = TYPE_array;
rlm@1	1934 elfAddType(t, unit, offset);
rlm@1	1935
rlm@1	1936 for (i = 0; i < abbrev->numAttrs; i++)
rlm@1	1937 {
rlm@1	1938 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	1939 data = elfReadAttribute(data, attr);
rlm@1	1940 switch (attr->name)
rlm@1	1941 {
rlm@1	1942 case DW_AT_sibling:
rlm@1	1943 break;
rlm@1	1944 case DW_AT_type:
rlm@1	1945 typeref = attr->value;
rlm@1	1946 array->type = elfParseType(unit, typeref);
rlm@1	1947 break;
rlm@1	1948 default:
rlm@1	1949 fprintf(stderr, "Unknown array attribute %02x\n", attr->name);
rlm@1	1950 }
rlm@1	1951 }
rlm@1	1952 if (abbrev->hasChildren)
rlm@1	1953 {
rlm@1	1954 int bytes;
rlm@1	1955 u32 num = elfReadLEB128(data, &bytes);
rlm@1	1956 data += bytes;
rlm@1	1957 int index = 0;
rlm@1	1958 int maxBounds = 0;
rlm@1	1959 while (num)
rlm@1	1960 {
rlm@1	1961 ELFAbbrev *abbr = elfGetAbbrev(unit->abbrevs, num);
rlm@1	1962
rlm@1	1963 switch (abbr->tag)
rlm@1	1964 {
rlm@1	1965 case DW_TAG_subrange_type:
rlm@1	1966 {
rlm@1	1967 if (maxBounds == index)
rlm@1	1968 {
rlm@1	1969 maxBounds += 4;
rlm@1	1970 array->bounds = (int *)realloc(array->bounds,
rlm@1	1971 sizeof(int)*maxBounds);
rlm@1	1972 }
rlm@1	1973 for (int i = 0; i < abbr->numAttrs; i++)
rlm@1	1974 {
rlm@1	1975 ELFAttr *attr = &abbr->attrs[i];
rlm@1	1976 data = elfReadAttribute(data, attr);
rlm@1	1977 switch (attr->name)
rlm@1	1978 {
rlm@1	1979 case DW_AT_upper_bound:
rlm@1	1980 array->bounds[index] = attr->value+1;
rlm@1	1981 break;
rlm@1	1982 case DW_AT_type: // ignore
rlm@1	1983 break;
rlm@1	1984 default:
rlm@1	1985 fprintf(stderr, "Unknown subrange attribute %02x\n",
rlm@1	1986 attr->name);
rlm@1	1987 }
rlm@1	1988 }
rlm@1	1989 index++;
rlm@1	1990 break;
rlm@1	1991 }
rlm@1	1992 default:
rlm@1	1993 fprintf(stderr, "Unknown array tag %02x\n", abbr->tag);
rlm@1	1994 data = elfSkipData(data, abbr, unit->abbrevs);
rlm@1	1995 break;
rlm@1	1996 }
rlm@1	1997 num = elfReadLEB128(data, &bytes);
rlm@1	1998 data += bytes;
rlm@1	1999 }
rlm@1	2000 array->maxBounds = index;
rlm@1	2001 }
rlm@1	2002 t->size = array->type->size;
rlm@1	2003 for (i = 0; i < array->maxBounds; i++)
rlm@1	2004 t->size *= array->bounds[i];
rlm@1	2005 t->array = array;
rlm@1	2006 *type = t;
rlm@1	2007 return;
rlm@1	2008 break;
rlm@1	2009 }
rlm@1	2010 default:
rlm@1	2011 fprintf(stderr, "Unknown type TAG %02x\n", abbrev->tag);
rlm@1	2012 exit(-1);
rlm@1	2013 }
rlm@1	2014 }
rlm@1	2015
rlm@1	2016 Type elfParseType(CompileUnit unit, u32 offset)
rlm@1	2017 {
rlm@1	2018 Type *t = unit->types;
rlm@1	2019
rlm@1	2020 while (t)
rlm@1	2021 {
rlm@1	2022 if (t->offset == offset)
rlm@1	2023 return t;
rlm@1	2024 t = t->next;
rlm@1	2025 }
rlm@1	2026 if (offset == 0)
rlm@1	2027 {
rlm@1	2028 Type t = (Type )calloc(sizeof(Type), 1);
rlm@1	2029 t->type = TYPE_void;
rlm@1	2030 t->offset = 0;
rlm@1	2031 elfAddType(t, unit, 0);
rlm@1	2032 return t;
rlm@1	2033 }
rlm@1	2034 u8 *data = unit->top + offset;
rlm@1	2035 int bytes;
rlm@1	2036 int abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2037 data += bytes;
rlm@1	2038 Type *type = NULL;
rlm@1	2039
rlm@1	2040 ELFAbbrev *abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2041
rlm@1	2042 elfParseType(data, offset, abbrev, unit, &type);
rlm@1	2043 return type;
rlm@1	2044 }
rlm@1	2045
rlm@1	2046 void elfGetObjectAttributes(CompileUnit unit, u32 offset, Object o)
rlm@1	2047 {
rlm@1	2048 u8 *data = unit->top + offset;
rlm@1	2049 int bytes;
rlm@1	2050 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2051 data += bytes;
rlm@1	2052
rlm@1	2053 if (!abbrevNum)
rlm@1	2054 {
rlm@1	2055 return;
rlm@1	2056 }
rlm@1	2057
rlm@1	2058 ELFAbbrev *abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2059
rlm@1	2060 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	2061 {
rlm@1	2062 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	2063 data = elfReadAttribute(data, attr);
rlm@1	2064 switch (attr->name)
rlm@1	2065 {
rlm@1	2066 case DW_AT_location:
rlm@1	2067 o->location = attr->block;
rlm@1	2068 break;
rlm@1	2069 case DW_AT_name:
rlm@1	2070 if (o->name == NULL)
rlm@1	2071 o->name = attr->string;
rlm@1	2072 break;
rlm@1	2073 case DW_AT_MIPS_linkage_name:
rlm@1	2074 o->name = attr->string;
rlm@1	2075 break;
rlm@1	2076 case DW_AT_decl_file:
rlm@1	2077 o->file = attr->value;
rlm@1	2078 break;
rlm@1	2079 case DW_AT_decl_line:
rlm@1	2080 o->line = attr->value;
rlm@1	2081 break;
rlm@1	2082 case DW_AT_type:
rlm@1	2083 o->type = elfParseType(unit, attr->value);
rlm@1	2084 break;
rlm@1	2085 case DW_AT_external:
rlm@1	2086 o->external = attr->flag;
rlm@1	2087 break;
rlm@1	2088 case DW_AT_const_value:
rlm@1	2089 case DW_AT_abstract_origin:
rlm@1	2090 case DW_AT_declaration:
rlm@1	2091 case DW_AT_artificial:
rlm@1	2092 // todo
rlm@1	2093 break;
rlm@1	2094 case DW_AT_specification:
rlm@1	2095 // TODO:
rlm@1	2096 break;
rlm@1	2097 default:
rlm@1	2098 fprintf(stderr, "Unknown object attribute %02x\n", attr->name);
rlm@1	2099 break;
rlm@1	2100 }
rlm@1	2101 }
rlm@1	2102 }
rlm@1	2103
rlm@1	2104 u8 elfParseObject(u8 data, ELFAbbrev abbrev, CompileUnit unit,
rlm@1	2105 Object **object)
rlm@1	2106 {
rlm@1	2107 Object o = (Object )calloc(sizeof(Object), 1);
rlm@1	2108
rlm@1	2109 o->next = NULL;
rlm@1	2110
rlm@1	2111 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	2112 {
rlm@1	2113 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	2114 data = elfReadAttribute(data, attr);
rlm@1	2115 switch (attr->name)
rlm@1	2116 {
rlm@1	2117 case DW_AT_location:
rlm@1	2118 o->location = attr->block;
rlm@1	2119 break;
rlm@1	2120 case DW_AT_name:
rlm@1	2121 if (o->name == NULL)
rlm@1	2122 o->name = attr->string;
rlm@1	2123 break;
rlm@1	2124 case DW_AT_MIPS_linkage_name:
rlm@1	2125 o->name = attr->string;
rlm@1	2126 break;
rlm@1	2127 case DW_AT_decl_file:
rlm@1	2128 o->file = attr->value;
rlm@1	2129 break;
rlm@1	2130 case DW_AT_decl_line:
rlm@1	2131 o->line = attr->value;
rlm@1	2132 break;
rlm@1	2133 case DW_AT_type:
rlm@1	2134 o->type = elfParseType(unit, attr->value);
rlm@1	2135 break;
rlm@1	2136 case DW_AT_external:
rlm@1	2137 o->external = attr->flag;
rlm@1	2138 break;
rlm@1	2139 case DW_AT_abstract_origin:
rlm@1	2140 elfGetObjectAttributes(unit, attr->value, o);
rlm@1	2141 break;
rlm@1	2142 case DW_AT_const_value:
rlm@1	2143 case DW_AT_declaration:
rlm@1	2144 case DW_AT_artificial:
rlm@1	2145 break;
rlm@1	2146 case DW_AT_specification:
rlm@1	2147 // TODO:
rlm@1	2148 break;
rlm@1	2149 default:
rlm@1	2150 fprintf(stderr, "Unknown object attribute %02x\n", attr->name);
rlm@1	2151 break;
rlm@1	2152 }
rlm@1	2153 }
rlm@1	2154 *object = o;
rlm@1	2155 return data;
rlm@1	2156 }
rlm@1	2157
rlm@1	2158 u8 elfParseBlock(u8 data, ELFAbbrev abbrev, CompileUnit unit,
rlm@1	2159 Function func, Object *lastVar)
rlm@1	2160 {
rlm@1	2161 int bytes;
rlm@1	2162 u32 start = func->lowPC;
rlm@1	2163 u32 end = func->highPC;
rlm@1	2164
rlm@1	2165 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	2166 {
rlm@1	2167 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	2168 data = elfReadAttribute(data, attr);
rlm@1	2169 switch (attr->name)
rlm@1	2170 {
rlm@1	2171 case DW_AT_sibling:
rlm@1	2172 break;
rlm@1	2173 case DW_AT_low_pc:
rlm@1	2174 start = attr->value;
rlm@1	2175 break;
rlm@1	2176 case DW_AT_high_pc:
rlm@1	2177 end = attr->value;
rlm@1	2178 break;
rlm@1	2179 case DW_AT_ranges: // ignore for now
rlm@1	2180 break;
rlm@1	2181 default:
rlm@1	2182 fprintf(stderr, "Unknown block attribute %02x\n", attr->name);
rlm@1	2183 break;
rlm@1	2184 }
rlm@1	2185 }
rlm@1	2186
rlm@1	2187 if (abbrev->hasChildren)
rlm@1	2188 {
rlm@1	2189 int nesting = 1;
rlm@1	2190
rlm@1	2191 while (nesting)
rlm@1	2192 {
rlm@1	2193 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2194 data += bytes;
rlm@1	2195
rlm@1	2196 if (!abbrevNum)
rlm@1	2197 {
rlm@1	2198 nesting--;
rlm@1	2199 continue;
rlm@1	2200 }
rlm@1	2201
rlm@1	2202 abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2203
rlm@1	2204 switch (abbrev->tag)
rlm@1	2205 {
rlm@1	2206 CASE_TYPE_TAG: // types only parsed when used
rlm@1	2207 case DW_TAG_label: // not needed
rlm@1	2208 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2209 break;
rlm@1	2210 case DW_TAG_lexical_block:
rlm@1	2211 data = elfParseBlock(data, abbrev, unit, func, lastVar);
rlm@1	2212 break;
rlm@1	2213 case DW_TAG_subprogram:
rlm@1	2214 {
rlm@1	2215 Function *f = NULL;
rlm@1	2216 data = elfParseFunction(data, abbrev, unit, &f);
rlm@1	2217 if (f != NULL)
rlm@1	2218 {
rlm@1	2219 if (unit->lastFunction)
rlm@1	2220 unit->lastFunction->next = f;
rlm@1	2221 else
rlm@1	2222 unit->functions = f;
rlm@1	2223 unit->lastFunction = f;
rlm@1	2224 }
rlm@1	2225 break;
rlm@1	2226 }
rlm@1	2227 case DW_TAG_variable:
rlm@1	2228 {
rlm@1	2229 Object *o;
rlm@1	2230 data = elfParseObject(data, abbrev, unit, &o);
rlm@1	2231 if (o->startScope == 0)
rlm@1	2232 o->startScope = start;
rlm@1	2233 if (o->endScope == 0)
rlm@1	2234 o->endScope = 0;
rlm@1	2235 if (func->variables)
rlm@1	2236 (*lastVar)->next = o;
rlm@1	2237 else
rlm@1	2238 func->variables = o;
rlm@1	2239 *lastVar = o;
rlm@1	2240 break;
rlm@1	2241 }
rlm@1	2242 case DW_TAG_inlined_subroutine:
rlm@1	2243 // TODO:
rlm@1	2244 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2245 break;
rlm@1	2246 default:
rlm@1	2247 {
rlm@1	2248 fprintf(stderr, "Unknown block TAG %02x\n", abbrev->tag);
rlm@1	2249 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2250 break;
rlm@1	2251 }
rlm@1	2252 }
rlm@1	2253 }
rlm@1	2254 }
rlm@1	2255 return data;
rlm@1	2256 }
rlm@1	2257
rlm@1	2258 void elfGetFunctionAttributes(CompileUnit unit, u32 offset, Function func)
rlm@1	2259 {
rlm@1	2260 u8 *data = unit->top + offset;
rlm@1	2261 int bytes;
rlm@1	2262 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2263 data += bytes;
rlm@1	2264
rlm@1	2265 if (!abbrevNum)
rlm@1	2266 {
rlm@1	2267 return;
rlm@1	2268 }
rlm@1	2269
rlm@1	2270 ELFAbbrev *abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2271
rlm@1	2272 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	2273 {
rlm@1	2274 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	2275 data = elfReadAttribute(data, attr);
rlm@1	2276
rlm@1	2277 switch (attr->name)
rlm@1	2278 {
rlm@1	2279 case DW_AT_sibling:
rlm@1	2280 break;
rlm@1	2281 case DW_AT_name:
rlm@1	2282 if (func->name == NULL)
rlm@1	2283 func->name = attr->string;
rlm@1	2284 break;
rlm@1	2285 case DW_AT_MIPS_linkage_name:
rlm@1	2286 func->name = attr->string;
rlm@1	2287 break;
rlm@1	2288 case DW_AT_low_pc:
rlm@1	2289 func->lowPC = attr->value;
rlm@1	2290 break;
rlm@1	2291 case DW_AT_high_pc:
rlm@1	2292 func->highPC = attr->value;
rlm@1	2293 break;
rlm@1	2294 case DW_AT_decl_file:
rlm@1	2295 func->file = attr->value;
rlm@1	2296 break;
rlm@1	2297 case DW_AT_decl_line:
rlm@1	2298 func->line = attr->value;
rlm@1	2299 break;
rlm@1	2300 case DW_AT_external:
rlm@1	2301 func->external = attr->flag;
rlm@1	2302 break;
rlm@1	2303 case DW_AT_frame_base:
rlm@1	2304 func->frameBase = attr->block;
rlm@1	2305 break;
rlm@1	2306 case DW_AT_type:
rlm@1	2307 func->returnType = elfParseType(unit, attr->value);
rlm@1	2308 break;
rlm@1	2309 case DW_AT_inline:
rlm@1	2310 case DW_AT_specification:
rlm@1	2311 case DW_AT_declaration:
rlm@1	2312 case DW_AT_artificial:
rlm@1	2313 case DW_AT_prototyped:
rlm@1	2314 case DW_AT_proc_body:
rlm@1	2315 case DW_AT_save_offset:
rlm@1	2316 case DW_AT_user_2002:
rlm@1	2317 case DW_AT_virtuality:
rlm@1	2318 case DW_AT_containing_type:
rlm@1	2319 case DW_AT_accessibility:
rlm@1	2320 // todo;
rlm@1	2321 break;
rlm@1	2322 case DW_AT_vtable_elem_location:
rlm@1	2323 free(attr->block);
rlm@1	2324 break;
rlm@1	2325 default:
rlm@1	2326 fprintf(stderr, "Unknown function attribute %02x\n", attr->name);
rlm@1	2327 break;
rlm@1	2328 }
rlm@1	2329 }
rlm@1	2330
rlm@1	2331 return;
rlm@1	2332 }
rlm@1	2333
rlm@1	2334 u8 elfParseFunction(u8 data, ELFAbbrev abbrev, CompileUnit unit,
rlm@1	2335 Function **f)
rlm@1	2336 {
rlm@1	2337 Function func = (Function )calloc(sizeof(Function), 1);
rlm@1	2338 *f = func;
rlm@1	2339
rlm@1	2340 int bytes;
rlm@1	2341 bool mangled = false;
rlm@1	2342 bool declaration = false;
rlm@1	2343 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	2344 {
rlm@1	2345 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	2346 data = elfReadAttribute(data, attr);
rlm@1	2347 switch (attr->name)
rlm@1	2348 {
rlm@1	2349 case DW_AT_sibling:
rlm@1	2350 break;
rlm@1	2351 case DW_AT_name:
rlm@1	2352 if (func->name == NULL)
rlm@1	2353 func->name = attr->string;
rlm@1	2354 break;
rlm@1	2355 case DW_AT_MIPS_linkage_name:
rlm@1	2356 func->name = attr->string;
rlm@1	2357 mangled = true;
rlm@1	2358 break;
rlm@1	2359 case DW_AT_low_pc:
rlm@1	2360 func->lowPC = attr->value;
rlm@1	2361 break;
rlm@1	2362 case DW_AT_high_pc:
rlm@1	2363 func->highPC = attr->value;
rlm@1	2364 break;
rlm@1	2365 case DW_AT_prototyped:
rlm@1	2366 break;
rlm@1	2367 case DW_AT_decl_file:
rlm@1	2368 func->file = attr->value;
rlm@1	2369 break;
rlm@1	2370 case DW_AT_decl_line:
rlm@1	2371 func->line = attr->value;
rlm@1	2372 break;
rlm@1	2373 case DW_AT_external:
rlm@1	2374 func->external = attr->flag;
rlm@1	2375 break;
rlm@1	2376 case DW_AT_frame_base:
rlm@1	2377 func->frameBase = attr->block;
rlm@1	2378 break;
rlm@1	2379 case DW_AT_type:
rlm@1	2380 func->returnType = elfParseType(unit, attr->value);
rlm@1	2381 break;
rlm@1	2382 case DW_AT_abstract_origin:
rlm@1	2383 elfGetFunctionAttributes(unit, attr->value, func);
rlm@1	2384 break;
rlm@1	2385 case DW_AT_declaration:
rlm@1	2386 declaration = attr->flag;
rlm@1	2387 break;
rlm@1	2388 case DW_AT_inline:
rlm@1	2389 case DW_AT_specification:
rlm@1	2390 case DW_AT_artificial:
rlm@1	2391 case DW_AT_proc_body:
rlm@1	2392 case DW_AT_save_offset:
rlm@1	2393 case DW_AT_user_2002:
rlm@1	2394 case DW_AT_virtuality:
rlm@1	2395 case DW_AT_containing_type:
rlm@1	2396 case DW_AT_accessibility:
rlm@1	2397 // todo;
rlm@1	2398 break;
rlm@1	2399 case DW_AT_vtable_elem_location:
rlm@1	2400 free(attr->block);
rlm@1	2401 break;
rlm@1	2402 default:
rlm@1	2403 fprintf(stderr, "Unknown function attribute %02x\n", attr->name);
rlm@1	2404 break;
rlm@1	2405 }
rlm@1	2406 }
rlm@1	2407
rlm@1	2408 if (declaration)
rlm@1	2409 {
rlm@1	2410 elfCleanUp(func);
rlm@1	2411 free(func);
rlm@1	2412 *f = NULL;
rlm@1	2413
rlm@1	2414 while (1)
rlm@1	2415 {
rlm@1	2416 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2417 data += bytes;
rlm@1	2418
rlm@1	2419 if (!abbrevNum)
rlm@1	2420 {
rlm@1	2421 return data;
rlm@1	2422 }
rlm@1	2423
rlm@1	2424 abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2425
rlm@1	2426 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2427 }
rlm@1	2428 }
rlm@1	2429
rlm@1	2430 if (abbrev->hasChildren)
rlm@1	2431 {
rlm@1	2432 int nesting = 1;
rlm@1	2433 Object *lastParam = NULL;
rlm@1	2434 Object *lastVar = NULL;
rlm@1	2435
rlm@1	2436 while (nesting)
rlm@1	2437 {
rlm@1	2438 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2439 data += bytes;
rlm@1	2440
rlm@1	2441 if (!abbrevNum)
rlm@1	2442 {
rlm@1	2443 nesting--;
rlm@1	2444 continue;
rlm@1	2445 }
rlm@1	2446
rlm@1	2447 abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2448
rlm@1	2449 switch (abbrev->tag)
rlm@1	2450 {
rlm@1	2451 CASE_TYPE_TAG: // no need to parse types. only parsed when used
rlm@1	2452 case DW_TAG_label: // not needed
rlm@1	2453 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2454 break;
rlm@1	2455 case DW_TAG_subprogram:
rlm@1	2456 {
rlm@1	2457 Function *fnc = NULL;
rlm@1	2458 data = elfParseFunction(data, abbrev, unit, &fnc);
rlm@1	2459 if (fnc != NULL)
rlm@1	2460 {
rlm@1	2461 if (unit->lastFunction == NULL)
rlm@1	2462 unit->functions = fnc;
rlm@1	2463 else
rlm@1	2464 unit->lastFunction->next = fnc;
rlm@1	2465 unit->lastFunction = fnc;
rlm@1	2466 }
rlm@1	2467 break;
rlm@1	2468 }
rlm@1	2469 case DW_TAG_lexical_block:
rlm@1	2470 {
rlm@1	2471 data = elfParseBlock(data, abbrev, unit, func, &lastVar);
rlm@1	2472 break;
rlm@1	2473 }
rlm@1	2474 case DW_TAG_formal_parameter:
rlm@1	2475 {
rlm@1	2476 Object *o;
rlm@1	2477 data = elfParseObject(data, abbrev, unit, &o);
rlm@1	2478 if (func->parameters)
rlm@1	2479 lastParam->next = o;
rlm@1	2480 else
rlm@1	2481 func->parameters = o;
rlm@1	2482 lastParam = o;
rlm@1	2483 break;
rlm@1	2484 }
rlm@1	2485 case DW_TAG_variable:
rlm@1	2486 {
rlm@1	2487 Object *o;
rlm@1	2488 data = elfParseObject(data, abbrev, unit, &o);
rlm@1	2489 if (func->variables)
rlm@1	2490 lastVar->next = o;
rlm@1	2491 else
rlm@1	2492 func->variables = o;
rlm@1	2493 lastVar = o;
rlm@1	2494 break;
rlm@1	2495 }
rlm@1	2496 case DW_TAG_unspecified_parameters:
rlm@1	2497 case DW_TAG_inlined_subroutine:
rlm@1	2498 {
rlm@1	2499 // todo
rlm@1	2500 for (int i = 0; i < abbrev->numAttrs; i++)
rlm@1	2501 {
rlm@1	2502 data = elfReadAttribute(data, &abbrev->attrs[i]);
rlm@1	2503 if (abbrev->attrs[i].form == DW_FORM_block1)
rlm@1	2504 free(abbrev->attrs[i].block);
rlm@1	2505 }
rlm@1	2506
rlm@1	2507 if (abbrev->hasChildren)
rlm@1	2508 nesting++;
rlm@1	2509 break;
rlm@1	2510 }
rlm@1	2511 default:
rlm@1	2512 {
rlm@1	2513 fprintf(stderr, "Unknown function TAG %02x\n", abbrev->tag);
rlm@1	2514 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2515 break;
rlm@1	2516 }
rlm@1	2517 }
rlm@1	2518 }
rlm@1	2519 }
rlm@1	2520 return data;
rlm@1	2521 }
rlm@1	2522
rlm@1	2523 u8 elfParseUnknownData(u8 data, ELFAbbrev abbrev, ELFAbbrev *abbrevs)
rlm@1	2524 {
rlm@1	2525 int i;
rlm@1	2526 int bytes;
rlm@1	2527 // switch(abbrev->tag) {
rlm@1	2528 // default:
rlm@1	2529 fprintf(stderr, "Unknown TAG %02x\n", abbrev->tag);
rlm@1	2530
rlm@1	2531 for (i = 0; i < abbrev->numAttrs; i++)
rlm@1	2532 {
rlm@1	2533 data = elfReadAttribute(data, &abbrev->attrs[i]);
rlm@1	2534 if (abbrev->attrs[i].form == DW_FORM_block1)
rlm@1	2535 free(abbrev->attrs[i].block);
rlm@1	2536 }
rlm@1	2537
rlm@1	2538 if (abbrev->hasChildren)
rlm@1	2539 {
rlm@1	2540 int nesting = 1;
rlm@1	2541 while (nesting)
rlm@1	2542 {
rlm@1	2543 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2544 data += bytes;
rlm@1	2545
rlm@1	2546 if (!abbrevNum)
rlm@1	2547 {
rlm@1	2548 nesting--;
rlm@1	2549 continue;
rlm@1	2550 }
rlm@1	2551
rlm@1	2552 abbrev = elfGetAbbrev(abbrevs, abbrevNum);
rlm@1	2553
rlm@1	2554 fprintf(stderr, "Unknown TAG %02x\n", abbrev->tag);
rlm@1	2555
rlm@1	2556 for (i = 0; i < abbrev->numAttrs; i++)
rlm@1	2557 {
rlm@1	2558 data = elfReadAttribute(data, &abbrev->attrs[i]);
rlm@1	2559 if (abbrev->attrs[i].form == DW_FORM_block1)
rlm@1	2560 free(abbrev->attrs[i].block);
rlm@1	2561 }
rlm@1	2562
rlm@1	2563 if (abbrev->hasChildren)
rlm@1	2564 {
rlm@1	2565 nesting++;
rlm@1	2566 }
rlm@1	2567 }
rlm@1	2568 }
rlm@1	2569 // }
rlm@1	2570 return data;
rlm@1	2571 }
rlm@1	2572
rlm@1	2573 u8 elfParseCompileUnitChildren(u8 data, CompileUnit *unit)
rlm@1	2574 {
rlm@1	2575 int bytes;
rlm@1	2576 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2577 data += bytes;
rlm@1	2578 Object *lastObj = NULL;
rlm@1	2579 while (abbrevNum)
rlm@1	2580 {
rlm@1	2581 ELFAbbrev *abbrev = elfGetAbbrev(unit->abbrevs, abbrevNum);
rlm@1	2582 switch (abbrev->tag)
rlm@1	2583 {
rlm@1	2584 case DW_TAG_subprogram:
rlm@1	2585 {
rlm@1	2586 Function *func = NULL;
rlm@1	2587 data = elfParseFunction(data, abbrev, unit, &func);
rlm@1	2588 if (func != NULL)
rlm@1	2589 {
rlm@1	2590 if (unit->lastFunction)
rlm@1	2591 unit->lastFunction->next = func;
rlm@1	2592 else
rlm@1	2593 unit->functions = func;
rlm@1	2594 unit->lastFunction = func;
rlm@1	2595 }
rlm@1	2596 break;
rlm@1	2597 }
rlm@1	2598 CASE_TYPE_TAG:
rlm@1	2599 data = elfSkipData(data, abbrev, unit->abbrevs);
rlm@1	2600 break;
rlm@1	2601 case DW_TAG_variable:
rlm@1	2602 {
rlm@1	2603 Object *var = NULL;
rlm@1	2604 data = elfParseObject(data, abbrev, unit, &var);
rlm@1	2605 if (lastObj)
rlm@1	2606 lastObj->next = var;
rlm@1	2607 else
rlm@1	2608 unit->variables = var;
rlm@1	2609 lastObj = var;
rlm@1	2610 break;
rlm@1	2611 }
rlm@1	2612 default:
rlm@1	2613 data = elfParseUnknownData(data, abbrev, unit->abbrevs);
rlm@1	2614 break;
rlm@1	2615 }
rlm@1	2616
rlm@1	2617 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2618 data += bytes;
rlm@1	2619 }
rlm@1	2620 return data;
rlm@1	2621 }
rlm@1	2622
rlm@1	2623 CompileUnit elfParseCompUnit(u8 data, u8 *abbrevData)
rlm@1	2624 {
rlm@1	2625 int bytes;
rlm@1	2626 u8 *top = data;
rlm@1	2627
rlm@1	2628 u32 length = elfRead4Bytes(data);
rlm@1	2629 data += 4;
rlm@1	2630
rlm@1	2631 u16 version = elfRead2Bytes(data);
rlm@1	2632 data += 2;
rlm@1	2633
rlm@1	2634 u32 offset = elfRead4Bytes(data);
rlm@1	2635 data += 4;
rlm@1	2636
rlm@1	2637 u8 addrSize = *data++;
rlm@1	2638
rlm@1	2639 if (version != 2)
rlm@1	2640 {
rlm@1	2641 fprintf(stderr, "Unsupported debugging information version %d\n", version);
rlm@1	2642 return NULL;
rlm@1	2643 }
rlm@1	2644
rlm@1	2645 if (addrSize != 4)
rlm@1	2646 {
rlm@1	2647 fprintf(stderr, "Unsupported address size %d\n", addrSize);
rlm@1	2648 return NULL;
rlm@1	2649 }
rlm@1	2650
rlm@1	2651 ELFAbbrev **abbrevs = elfReadAbbrevs(abbrevData, offset);
rlm@1	2652
rlm@1	2653 u32 abbrevNum = elfReadLEB128(data, &bytes);
rlm@1	2654 data += bytes;
rlm@1	2655
rlm@1	2656 ELFAbbrev *abbrev = elfGetAbbrev(abbrevs, abbrevNum);
rlm@1	2657
rlm@1	2658 CompileUnit unit = (CompileUnit )calloc(sizeof(CompileUnit), 1);
rlm@1	2659 unit->top = top;
rlm@1	2660 unit->length = length;
rlm@1	2661 unit->abbrevs = abbrevs;
rlm@1	2662 unit->next = NULL;
rlm@1	2663
rlm@1	2664 elfCurrentUnit = unit;
rlm@1	2665
rlm@1	2666 int i;
rlm@1	2667
rlm@1	2668 for (i = 0; i < abbrev->numAttrs; i++)
rlm@1	2669 {
rlm@1	2670 ELFAttr *attr = &abbrev->attrs[i];
rlm@1	2671 data = elfReadAttribute(data, attr);
rlm@1	2672
rlm@1	2673 switch (attr->name)
rlm@1	2674 {
rlm@1	2675 case DW_AT_name:
rlm@1	2676 unit->name = attr->string;
rlm@1	2677 break;
rlm@1	2678 case DW_AT_stmt_list:
rlm@1	2679 unit->hasLineInfo = true;
rlm@1	2680 unit->lineInfo = attr->value;
rlm@1	2681 break;
rlm@1	2682 case DW_AT_low_pc:
rlm@1	2683 unit->lowPC = attr->value;
rlm@1	2684 break;
rlm@1	2685 case DW_AT_high_pc:
rlm@1	2686 unit->highPC = attr->value;
rlm@1	2687 break;
rlm@1	2688 case DW_AT_compdir:
rlm@1	2689 unit->compdir = attr->string;
rlm@1	2690 break;
rlm@1	2691 // ignore
rlm@1	2692 case DW_AT_language:
rlm@1	2693 case DW_AT_producer:
rlm@1	2694 case DW_AT_macro_info:
rlm@1	2695 case DW_AT_entry_pc:
rlm@1	2696 break;
rlm@1	2697 default:
rlm@1	2698 fprintf(stderr, "Unknown attribute %02x\n", attr->name);
rlm@1	2699 break;
rlm@1	2700 }
rlm@1	2701 }
rlm@1	2702
rlm@1	2703 if (abbrev->hasChildren)
rlm@1	2704 elfParseCompileUnitChildren(data, unit);
rlm@1	2705
rlm@1	2706 return unit;
rlm@1	2707 }
rlm@1	2708
rlm@1	2709 void elfParseAranges(u8 *data)
rlm@1	2710 {
rlm@1	2711 ELFSectionHeader *sh = elfGetSectionByName(".debug_aranges");
rlm@1	2712 if (sh == NULL)
rlm@1	2713 {
rlm@1	2714 fprintf(stderr, "No aranges found\n");
rlm@1	2715 return;
rlm@1	2716 }
rlm@1	2717
rlm@1	2718 data = elfReadSection(data, sh);
rlm@1	2719 u8 *end = data + READ32LE(&sh->size);
rlm@1	2720
rlm@1	2721 int max = 4;
rlm@1	2722 ARanges ranges = (ARanges )calloc(sizeof(ARanges), 4);
rlm@1	2723
rlm@1	2724 int index = 0;
rlm@1	2725
rlm@1	2726 while (data < end)
rlm@1	2727 {
rlm@1	2728 u32 len = elfRead4Bytes(data);
rlm@1	2729 data += 4;
rlm@1	2730 // u16 version = elfRead2Bytes(data);
rlm@1	2731 data += 2;
rlm@1	2732 u32 offset = elfRead4Bytes(data);
rlm@1	2733 data += 4;
rlm@1	2734 // u8 addrSize = *data++;
rlm@1	2735 // u8 segSize = *data++;
rlm@1	2736 data += 2; // remove if uncommenting above
rlm@1	2737 data += 4;
rlm@1	2738 ranges[index].count = (len-20)/8;
rlm@1	2739 ranges[index].offset = offset;
rlm@1	2740 ranges[index].ranges = (ARange *)calloc(sizeof(ARange), (len-20)/8);
rlm@1	2741 int i = 0;
rlm@1	2742 while (true)
rlm@1	2743 {
rlm@1	2744 u32 addr = elfRead4Bytes(data);
rlm@1	2745 data += 4;
rlm@1	2746 u32 len = elfRead4Bytes(data);
rlm@1	2747 data += 4;
rlm@1	2748 if (addr == 0 && len == 0)
rlm@1	2749 break;
rlm@1	2750 ranges[index].ranges[i].lowPC = addr;
rlm@1	2751 ranges[index].ranges[i].highPC = addr+len;
rlm@1	2752 i++;
rlm@1	2753 }
rlm@1	2754 index++;
rlm@1	2755 if (index == max)
rlm@1	2756 {
rlm@1	2757 max += 4;
rlm@1	2758 ranges = (ARanges )realloc(ranges, maxsizeof(ARanges));
rlm@1	2759 }
rlm@1	2760 }
rlm@1	2761 elfDebugInfo->numRanges = index;
rlm@1	2762 elfDebugInfo->ranges = ranges;
rlm@1	2763 }
rlm@1	2764
rlm@1	2765 void elfReadSymtab(u8 *data)
rlm@1	2766 {
rlm@1	2767 ELFSectionHeader *sh = elfGetSectionByName(".symtab");
rlm@1	2768 int table = READ32LE(&sh->link);
rlm@1	2769
rlm@1	2770 char strtable = (char )elfReadSection(data, elfGetSectionByNumber(table));
rlm@1	2771
rlm@1	2772 ELFSymbol symtab = (ELFSymbol )elfReadSection(data, sh);
rlm@1	2773
rlm@1	2774 int count = READ32LE(&sh->size) / sizeof(ELFSymbol);
rlm@1	2775 elfSymbolsCount = 0;
rlm@1	2776
rlm@1	2777 elfSymbols = (Symbol )malloc(sizeof(Symbol)count);
rlm@1	2778
rlm@1	2779 int i;
rlm@1	2780
rlm@1	2781 for (i = 0; i < count; i++)
rlm@1	2782 {
rlm@1	2783 ELFSymbol *s = &symtab[i];
rlm@1	2784 int type = s->info & 15;
rlm@1	2785 int binding = s->info >> 4;
rlm@1	2786
rlm@1	2787 if (binding)
rlm@1	2788 {
rlm@1	2789 Symbol *sym = &elfSymbols[elfSymbolsCount];
rlm@1	2790 sym->name = &strtable[READ32LE(&s->name)];
rlm@1	2791 sym->binding = binding;
rlm@1	2792 sym->type = type;
rlm@1	2793 sym->value = READ32LE(&s->value);
rlm@1	2794 sym->size = READ32LE(&s->size);
rlm@1	2795 elfSymbolsCount++;
rlm@1	2796 }
rlm@1	2797 }
rlm@1	2798 for (i = 0; i < count; i++)
rlm@1	2799 {
rlm@1	2800 ELFSymbol *s = &symtab[i];
rlm@1	2801 int bind = s->info>>4;
rlm@1	2802 int type = s->info & 15;
rlm@1	2803
rlm@1	2804 if (!bind)
rlm@1	2805 {
rlm@1	2806 Symbol *sym = &elfSymbols[elfSymbolsCount];
rlm@1	2807 sym->name = &strtable[READ32LE(&s->name)];
rlm@1	2808 sym->binding = (s->info >> 4);
rlm@1	2809 sym->type = type;
rlm@1	2810 sym->value = READ32LE(&s->value);
rlm@1	2811 sym->size = READ32LE(&s->size);
rlm@1	2812 elfSymbolsCount++;
rlm@1	2813 }
rlm@1	2814 }
rlm@1	2815 elfSymbolsStrTab = strtable;
rlm@1	2816 // free(symtab);
rlm@1	2817 }
rlm@1	2818
rlm@1	2819 bool elfReadProgram(ELFHeader eh, u8 data, int& size, bool parseDebug)
rlm@1	2820 {
rlm@1	2821 int count = READ16LE(&eh->e_phnum);
rlm@1	2822 int i;
rlm@1	2823
rlm@1	2824 if (READ32LE(&eh->e_entry) == 0x2000000)
rlm@1	2825 cpuIsMultiBoot = true;
rlm@1	2826
rlm@1	2827 // read program headers... should probably move this code down
rlm@1	2828 u8 *p = data + READ32LE(&eh->e_phoff);
rlm@1	2829 size = 0;
rlm@1	2830 for (i = 0; i < count; i++)
rlm@1	2831 {
rlm@1	2832 ELFProgramHeader ph = (ELFProgramHeader )p;
rlm@1	2833 p += sizeof(ELFProgramHeader);
rlm@1	2834 if (READ16LE(&eh->e_phentsize) != sizeof(ELFProgramHeader))
rlm@1	2835 {
rlm@1	2836 p += READ16LE(&eh->e_phentsize) - sizeof(ELFProgramHeader);
rlm@1	2837 }
rlm@1	2838
rlm@1	2839 // printf("PH %d %08x %08x %08x %08x %08x %08x %08x %08x\n",
rlm@1	2840 // i, ph->type, ph->offset, ph->vaddr, ph->paddr,
rlm@1	2841 // ph->filesz, ph->memsz, ph->flags, ph->align);
rlm@1	2842 if (cpuIsMultiBoot)
rlm@1	2843 {
rlm@1	2844 if (READ32LE(&ph->paddr) >= 0x2000000 &&
rlm@1	2845 READ32LE(&ph->paddr) <= 0x203ffff)
rlm@1	2846 {
rlm@1	2847 memcpy(&workRAM[READ32LE(&ph->paddr) & 0x3ffff],
rlm@1	2848 data + READ32LE(&ph->offset),
rlm@1	2849 READ32LE(&ph->filesz));
rlm@1	2850 }
rlm@1	2851 }
rlm@1	2852 else
rlm@1	2853 {
rlm@1	2854 if (READ32LE(&ph->paddr) >= 0x8000000 &&
rlm@1	2855 READ32LE(&ph->paddr) <= 0x9ffffff)
rlm@1	2856 {
rlm@1	2857 memcpy(&rom[READ32LE(&ph->paddr) & 0x1ffffff],
rlm@1	2858 data + READ32LE(&ph->offset),
rlm@1	2859 READ32LE(&ph->filesz));
rlm@1	2860 size += READ32LE(&ph->filesz);
rlm@1	2861 }
rlm@1	2862 }
rlm@1	2863 }
rlm@1	2864
rlm@1	2865 char *stringTable = NULL;
rlm@1	2866
rlm@1	2867 // read section headers
rlm@1	2868 p = data + READ32LE(&eh->e_shoff);
rlm@1	2869 count = READ16LE(&eh->e_shnum);
rlm@1	2870
rlm@1	2871 ELFSectionHeader *sh = (ELFSectionHeader *)
rlm@1	2872 malloc(sizeof(ELFSectionHeader ) count);
rlm@1	2873
rlm@1	2874 for (i = 0; i < count; i++)
rlm@1	2875 {
rlm@1	2876 sh[i] = (ELFSectionHeader *)p;
rlm@1	2877 p += sizeof(ELFSectionHeader);
rlm@1	2878 if (READ16LE(&eh->e_shentsize) != sizeof(ELFSectionHeader))
rlm@1	2879 p += READ16LE(&eh->e_shentsize) - sizeof(ELFSectionHeader);
rlm@1	2880 }
rlm@1	2881
rlm@1	2882 if (READ16LE(&eh->e_shstrndx) != 0)
rlm@1	2883 {
rlm@1	2884 stringTable = (char *)elfReadSection(data,
rlm@1	2885 sh[READ16LE(&eh->e_shstrndx)]);
rlm@1	2886 }
rlm@1	2887
rlm@1	2888 elfSectionHeaders = sh;
rlm@1	2889 elfSectionHeadersStringTable = stringTable;
rlm@1	2890 elfSectionHeadersCount = count;
rlm@1	2891
rlm@1	2892 for (i = 0; i < count; i++)
rlm@1	2893 {
rlm@1	2894 // printf("SH %d %-20s %08x %08x %08x %08x %08x %08x %08x %08x\n",
rlm@1	2895 // i, &stringTable[sh[i]->name], sh[i]->name, sh[i]->type,
rlm@1	2896 // sh[i]->flags, sh[i]->addr, sh[i]->offset, sh[i]->size,
rlm@1	2897 // sh[i]->link, sh[i]->info);
rlm@1	2898 if (READ32LE(&sh[i]->flags) & 2) // load section
rlm@1	2899 {
rlm@1	2900 if (cpuIsMultiBoot)
rlm@1	2901 {
rlm@1	2902 if (READ32LE(&sh[i]->addr) >= 0x2000000 &&
rlm@1	2903 READ32LE(&sh[i]->addr) <= 0x203ffff)
rlm@1	2904 {
rlm@1	2905 memcpy(&workRAM[READ32LE(&sh[i]->addr) & 0x3ffff], data +
rlm@1	2906 READ32LE(&sh[i]->offset),
rlm@1	2907 READ32LE(&sh[i]->size));
rlm@1	2908 }
rlm@1	2909 }
rlm@1	2910 else
rlm@1	2911 {
rlm@1	2912 if (READ32LE(&sh[i]->addr) >= 0x8000000 &&
rlm@1	2913 READ32LE(&sh[i]->addr) <= 0x9ffffff)
rlm@1	2914 {
rlm@1	2915 memcpy(&rom[READ32LE(&sh[i]->addr) & 0x1ffffff],
rlm@1	2916 data + READ32LE(&sh[i]->offset),
rlm@1	2917 READ32LE(&sh[i]->size));
rlm@1	2918 size += READ32LE(&sh[i]->size);
rlm@1	2919 }
rlm@1	2920 }
rlm@1	2921 }
rlm@1	2922 }
rlm@1	2923
rlm@1	2924 if (parseDebug)
rlm@1	2925 {
rlm@1	2926 fprintf(stderr, "Parsing debug info\n");
rlm@1	2927
rlm@1	2928 ELFSectionHeader *dbgHeader = elfGetSectionByName(".debug_info");
rlm@1	2929 if (dbgHeader == NULL)
rlm@1	2930 {
rlm@1	2931 fprintf(stderr, "Cannot find debug information\n");
rlm@1	2932 goto end;
rlm@1	2933 }
rlm@1	2934
rlm@1	2935 ELFSectionHeader *h = elfGetSectionByName(".debug_abbrev");
rlm@1	2936 if (h == NULL)
rlm@1	2937 {
rlm@1	2938 fprintf(stderr, "Cannot find abbreviation table\n");
rlm@1	2939 goto end;
rlm@1	2940 }
rlm@1	2941
rlm@1	2942 elfDebugInfo = (DebugInfo *)calloc(sizeof(DebugInfo), 1);
rlm@1	2943 u8 *abbrevdata = elfReadSection(data, h);
rlm@1	2944
rlm@1	2945 h = elfGetSectionByName(".debug_str");
rlm@1	2946
rlm@1	2947 if (h == NULL)
rlm@1	2948 elfDebugStrings = NULL;
rlm@1	2949 else
rlm@1	2950 elfDebugStrings = (char *)elfReadSection(data, h);
rlm@1	2951
rlm@1	2952 u8 *debugdata = elfReadSection(data, dbgHeader);
rlm@1	2953
rlm@1	2954 elfDebugInfo->debugdata = data;
rlm@1	2955 elfDebugInfo->infodata = debugdata;
rlm@1	2956
rlm@1	2957 u32 total = READ32LE(&dbgHeader->size);
rlm@1	2958 u8 *end = debugdata + total;
rlm@1	2959 u8 *ddata = debugdata;
rlm@1	2960
rlm@1	2961 CompileUnit *last = NULL;
rlm@1	2962 CompileUnit *unit = NULL;
rlm@1	2963
rlm@1	2964 while (ddata < end)
rlm@1	2965 {
rlm@1	2966 unit = elfParseCompUnit(ddata, abbrevdata);
rlm@1	2967 unit->offset = ddata-debugdata;
rlm@1	2968 elfParseLineInfo(unit, data);
rlm@1	2969 if (last == NULL)
rlm@1	2970 elfCompileUnits = unit;
rlm@1	2971 else
rlm@1	2972 last->next = unit;
rlm@1	2973 last = unit;
rlm@1	2974 ddata += 4 + unit->length;
rlm@1	2975 }
rlm@1	2976 elfParseAranges(data);
rlm@1	2977 CompileUnit *comp = elfCompileUnits;
rlm@1	2978 while (comp)
rlm@1	2979 {
rlm@1	2980 ARanges *r = elfDebugInfo->ranges;
rlm@1	2981 for (int i = 0; i < elfDebugInfo->numRanges; i++)
rlm@1	2982 if (r[i].offset == comp->offset)
rlm@1	2983 {
rlm@1	2984 comp->ranges = &r[i];
rlm@1	2985 break;
rlm@1	2986 }
rlm@1	2987 comp = comp->next;
rlm@1	2988 }
rlm@1	2989 elfParseCFA(data);
rlm@1	2990 elfReadSymtab(data);
rlm@1	2991 }
rlm@1	2992 end:
rlm@1	2993 if (sh)
rlm@1	2994 {
rlm@1	2995 free(sh);
rlm@1	2996 }
rlm@1	2997
rlm@1	2998 elfSectionHeaders = NULL;
rlm@1	2999 elfSectionHeadersStringTable = NULL;
rlm@1	3000 elfSectionHeadersCount = 0;
rlm@1	3001
rlm@1	3002 return true;
rlm@1	3003 }
rlm@1	3004
rlm@1	3005 extern bool8 parseDebug;
rlm@1	3006
rlm@1	3007 bool elfRead(const char name, int& siz, FILE f)
rlm@1	3008 {
rlm@1	3009 fseek(f, 0, SEEK_END);
rlm@1	3010 long size = ftell(f);
rlm@1	3011 elfFileData = (u8 *)malloc(size);
rlm@1	3012 fseek(f, 0, SEEK_SET);
rlm@1	3013 fread(elfFileData, 1, size, f);
rlm@1	3014 fclose(f);
rlm@1	3015
rlm@1	3016 ELFHeader header = (ELFHeader )elfFileData;
rlm@1	3017
rlm@1	3018 if (READ32LE(&header->magic) != 0x464C457F \|\|
rlm@1	3019 READ16LE(&header->e_machine) != 40 \|\|
rlm@1	3020 header->clazz != 1)
rlm@1	3021 {
rlm@1	3022 systemMessage(0, N_("Not a valid ELF file %s"), name);
rlm@1	3023 free(elfFileData);
rlm@1	3024 elfFileData = NULL;
rlm@1	3025 return false;
rlm@1	3026 }
rlm@1	3027
rlm@1	3028 if (!elfReadProgram(header, elfFileData, siz, parseDebug))
rlm@1	3029 {
rlm@1	3030 free(elfFileData);
rlm@1	3031 elfFileData = NULL;
rlm@1	3032 return false;
rlm@1	3033 }
rlm@1	3034
rlm@1	3035 return true;
rlm@1	3036 }
rlm@1	3037
rlm@1	3038 void elfCleanUp(Object *o)
rlm@1	3039 {
rlm@1	3040 free(o->location);
rlm@1	3041 }
rlm@1	3042
rlm@1	3043 void elfCleanUp(Function *func)
rlm@1	3044 {
rlm@1	3045 Object *o = func->parameters;
rlm@1	3046 while (o)
rlm@1	3047 {
rlm@1	3048 elfCleanUp(o);
rlm@1	3049 Object *next = o->next;
rlm@1	3050 free(o);
rlm@1	3051 o = next;
rlm@1	3052 }
rlm@1	3053
rlm@1	3054 o = func->variables;
rlm@1	3055 while (o)
rlm@1	3056 {
rlm@1	3057 elfCleanUp(o);
rlm@1	3058 Object *next = o->next;
rlm@1	3059 free(o);
rlm@1	3060 o = next;
rlm@1	3061 }
rlm@1	3062 free(func->frameBase);
rlm@1	3063 }
rlm@1	3064
rlm@1	3065 void elfCleanUp(ELFAbbrev **abbrevs)
rlm@1	3066 {
rlm@1	3067 for (int i = 0; i < 121; i++)
rlm@1	3068 {
rlm@1	3069 ELFAbbrev *abbrev = abbrevs[i];
rlm@1	3070
rlm@1	3071 while (abbrev)
rlm@1	3072 {
rlm@1	3073 free(abbrev->attrs);
rlm@1	3074 ELFAbbrev *next = abbrev->next;
rlm@1	3075 free(abbrev);
rlm@1	3076
rlm@1	3077 abbrev = next;
rlm@1	3078 }
rlm@1	3079 }
rlm@1	3080 }
rlm@1	3081
rlm@1	3082 void elfCleanUp(Type *t)
rlm@1	3083 {
rlm@1	3084 switch (t->type)
rlm@1	3085 {
rlm@1	3086 case TYPE_function:
rlm@1	3087 if (t->function)
rlm@1	3088 {
rlm@1	3089 Object *o = t->function->args;
rlm@1	3090 while (o)
rlm@1	3091 {
rlm@1	3092 elfCleanUp(o);
rlm@1	3093 Object *next = o->next;
rlm@1	3094 free(o);
rlm@1	3095 o = next;
rlm@1	3096 }
rlm@1	3097 free(t->function);
rlm@1	3098 }
rlm@1	3099 break;
rlm@1	3100 case TYPE_array:
rlm@1	3101 if (t->array)
rlm@1	3102 {
rlm@1	3103 free(t->array->bounds);
rlm@1	3104 free(t->array);
rlm@1	3105 }
rlm@1	3106 break;
rlm@1	3107 case TYPE_struct:
rlm@1	3108 case TYPE_union:
rlm@1	3109 if (t->structure)
rlm@1	3110 {
rlm@1	3111 for (int i = 0; i < t->structure->memberCount; i++)
rlm@1	3112 {
rlm@1	3113 free(t->structure->members[i].location);
rlm@1	3114 }
rlm@1	3115 free(t->structure->members);
rlm@1	3116 free(t->structure);
rlm@1	3117 }
rlm@1	3118 break;
rlm@1	3119 case TYPE_enum:
rlm@1	3120 if (t->enumeration)
rlm@1	3121 {
rlm@1	3122 free(t->enumeration->members);
rlm@1	3123 free(t->enumeration);
rlm@1	3124 }
rlm@1	3125 break;
rlm@1	3126 case TYPE_base:
rlm@1	3127 case TYPE_pointer:
rlm@1	3128 case TYPE_void:
rlm@1	3129 case TYPE_reference:
rlm@1	3130 break; // nothing to do
rlm@1	3131 }
rlm@1	3132 }
rlm@1	3133
rlm@1	3134 void elfCleanUp(CompileUnit *comp)
rlm@1	3135 {
rlm@1	3136 elfCleanUp(comp->abbrevs);
rlm@1	3137 free(comp->abbrevs);
rlm@1	3138 Function *func = comp->functions;
rlm@1	3139 while (func)
rlm@1	3140 {
rlm@1	3141 elfCleanUp(func);
rlm@1	3142 Function *next = func->next;
rlm@1	3143 free(func);
rlm@1	3144 func = next;
rlm@1	3145 }
rlm@1	3146 Type *t = comp->types;
rlm@1	3147 while (t)
rlm@1	3148 {
rlm@1	3149 elfCleanUp(t);
rlm@1	3150 Type *next = t->next;
rlm@1	3151 free(t);
rlm@1	3152 t = next;
rlm@1	3153 }
rlm@1	3154 Object *o = comp->variables;
rlm@1	3155 while (o)
rlm@1	3156 {
rlm@1	3157 elfCleanUp(o);
rlm@1	3158 Object *next = o->next;
rlm@1	3159 free(o);
rlm@1	3160 o = next;
rlm@1	3161 }
rlm@1	3162 if (comp->lineInfoTable)
rlm@1	3163 {
rlm@1	3164 free(comp->lineInfoTable->lines);
rlm@1	3165 free(comp->lineInfoTable->files);
rlm@1	3166 free(comp->lineInfoTable);
rlm@1	3167 }
rlm@1	3168 }
rlm@1	3169
rlm@1	3170 void elfCleanUp()
rlm@1	3171 {
rlm@1	3172 CompileUnit *comp = elfCompileUnits;
rlm@1	3173
rlm@1	3174 while (comp)
rlm@1	3175 {
rlm@1	3176 elfCleanUp(comp);
rlm@1	3177 CompileUnit *next = comp->next;
rlm@1	3178 free(comp);
rlm@1	3179 comp = next;
rlm@1	3180 }
rlm@1	3181 elfCompileUnits = NULL;
rlm@1	3182 free(elfSymbols);
rlm@1	3183 elfSymbols = NULL;
rlm@1	3184 // free(elfSymbolsStrTab);
rlm@1	3185 elfSymbolsStrTab = NULL;
rlm@1	3186
rlm@1	3187 elfDebugStrings = NULL;
rlm@1	3188 if (elfDebugInfo)
rlm@1	3189 {
rlm@1	3190 int num = elfDebugInfo->numRanges;
rlm@1	3191 int i;
rlm@1	3192 for (i = 0; i < num; i++)
rlm@1	3193 {
rlm@1	3194 free(elfDebugInfo->ranges[i].ranges);
rlm@1	3195 }
rlm@1	3196 free(elfDebugInfo->ranges);
rlm@1	3197 free(elfDebugInfo);
rlm@1	3198 elfDebugInfo = NULL;
rlm@1	3199 }
rlm@1	3200
rlm@1	3201 if (elfFdes)
rlm@1	3202 {
rlm@1	3203 if (elfFdeCount)
rlm@1	3204 {
rlm@1	3205 for (int i = 0; i < elfFdeCount; i++)
rlm@1	3206 free(elfFdes[i]);
rlm@1	3207 }
rlm@1	3208 free(elfFdes);
rlm@1	3209
rlm@1	3210 elfFdes = NULL;
rlm@1	3211 elfFdeCount = 0;
rlm@1	3212 }
rlm@1	3213
rlm@1	3214 ELFcie *cie = elfCies;
rlm@1	3215 while (cie)
rlm@1	3216 {
rlm@1	3217 ELFcie *next = cie->next;
rlm@1	3218 free(cie);
rlm@1	3219 cie = next;
rlm@1	3220 }
rlm@1	3221 elfCies = NULL;
rlm@1	3222
rlm@1	3223 if (elfFileData)
rlm@1	3224 {
rlm@1	3225 free(elfFileData);
rlm@1	3226 elfFileData = NULL;
rlm@1	3227 }
rlm@1	3228 }
rlm@1	3229

Mercurial > vba-linux

annotate src/gba/elf.cpp @ 1:f9f4f1b99eed