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tcc-stupidos/tccdbg.c
herman ten brugge 322c4dc275 Add support for backtrace() 
This requires adding .eh_frame and .eh_frame_hdr sections.

There are 3 new functions to setup the sections:
tcc_eh_frame_start: create cie in .eh_frame
tcc_debug_frame_end: add fde in .eh_frame for every function
tcc_eh_frame_hdr: create .eh_frame_hdr

The PT_GNU_EH_FRAME header is created.

The dwarf read functions are moved from tccrun.c to tcc.h

The backtrace() function is not supported on all targets.
windows, apple, bsd and arm are disabled.
arm uses its own sections .ARM.extab and .ARM.exidx.
2024-11-09 08:04:45 +01:00

2479 lines
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/*
* TCC - Tiny C Compiler
*
* Copyright (c) 2001-2004 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tcc.h"
/* stab debug support */
static const struct {
int type;
int size;
int encoding;
const char *name;
} default_debug[] = {
{ VT_INT, 4, DW_ATE_signed, "int:t1=r1;-2147483648;2147483647;" },
{ VT_BYTE, 1, DW_ATE_signed_char, "char:t2=r2;0;127;" },
#if LONG_SIZE == 4
{ VT_LONG | VT_INT, 4, DW_ATE_signed, "long int:t3=r3;-2147483648;2147483647;" },
#else
{ VT_LLONG | VT_LONG, 8, DW_ATE_signed, "long int:t3=r3;-9223372036854775808;9223372036854775807;" },
#endif
{ VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "unsigned int:t4=r4;0;037777777777;" },
#if LONG_SIZE == 4
{ VT_LONG | VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "long unsigned int:t5=r5;0;037777777777;" },
#else
/* use octal instead of -1 so size_t works (-gstabs+ in gcc) */
{ VT_LLONG | VT_LONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t5=r5;0;01777777777777777777777;" },
#endif
{ VT_QLONG, 16, DW_ATE_signed, "__int128:t6=r6;0;-1;" },
{ VT_QLONG | VT_UNSIGNED, 16, DW_ATE_unsigned, "__int128 unsigned:t7=r7;0;-1;" },
{ VT_LLONG, 8, DW_ATE_signed, "long long int:t8=r8;-9223372036854775808;9223372036854775807;" },
{ VT_LLONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long long unsigned int:t9=r9;0;01777777777777777777777;" },
{ VT_SHORT, 2, DW_ATE_signed, "short int:t10=r10;-32768;32767;" },
{ VT_SHORT | VT_UNSIGNED, 2, DW_ATE_unsigned, "short unsigned int:t11=r11;0;65535;" },
{ VT_BYTE | VT_DEFSIGN, 1, DW_ATE_signed_char, "signed char:t12=r12;-128;127;" },
{ VT_BYTE | VT_DEFSIGN | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t13=r13;0;255;" },
{ VT_FLOAT, 4, DW_ATE_float, "float:t14=r1;4;0;" },
{ VT_DOUBLE, 8, DW_ATE_float, "double:t15=r1;8;0;" },
#ifdef TCC_USING_DOUBLE_FOR_LDOUBLE
{ VT_DOUBLE | VT_LONG, 8, DW_ATE_float, "long double:t16=r1;8;0;" },
#else
{ VT_LDOUBLE, 16, DW_ATE_float, "long double:t16=r1;16;0;" },
#endif
{ -1, -1, -1, "_Float32:t17=r1;4;0;" },
{ -1, -1, -1, "_Float64:t18=r1;8;0;" },
{ -1, -1, -1, "_Float128:t19=r1;16;0;" },
{ -1, -1, -1, "_Float32x:t20=r1;8;0;" },
{ -1, -1, -1, "_Float64x:t21=r1;16;0;" },
{ -1, -1, -1, "_Decimal32:t22=r1;4;0;" },
{ -1, -1, -1, "_Decimal64:t23=r1;8;0;" },
{ -1, -1, -1, "_Decimal128:t24=r1;16;0;" },
/* if default char is unsigned */
{ VT_BYTE | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t25=r25;0;255;" },
/* boolean type */
{ VT_BOOL, 1, DW_ATE_boolean, "bool:t26=r26;0;255;" },
#if LONG_SIZE == 4
{ VT_VOID, 1, DW_ATE_unsigned_char, "void:t27=27" },
#else
/* bitfields use these */
{ VT_LONG | VT_INT, 8, DW_ATE_signed, "long int:t27=r27;-9223372036854775808;9223372036854775807;" },
{ VT_LONG | VT_INT | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t28=r28;0;01777777777777777777777;" },
{ VT_VOID, 1, DW_ATE_unsigned_char, "void:t29=29" },
#endif
};
#define N_DEFAULT_DEBUG (sizeof (default_debug) / sizeof (default_debug[0]))
/* dwarf debug */
#define DWARF_LINE_BASE -5
#define DWARF_LINE_RANGE 14
#define DWARF_OPCODE_BASE 13
#if defined TCC_TARGET_ARM64
#define DWARF_MIN_INSTR_LEN 4
#elif defined TCC_TARGET_ARM
#define DWARF_MIN_INSTR_LEN 2
#else
#define DWARF_MIN_INSTR_LEN 1
#endif
#define DWARF_ABBREV_COMPILE_UNIT 1
#define DWARF_ABBREV_BASE_TYPE 2
#define DWARF_ABBREV_VARIABLE_EXTERNAL 3
#define DWARF_ABBREV_VARIABLE_STATIC 4
#define DWARF_ABBREV_VARIABLE_LOCAL 5
#define DWARF_ABBREV_FORMAL_PARAMETER 6
#define DWARF_ABBREV_POINTER 7
#define DWARF_ABBREV_ARRAY_TYPE 8
#define DWARF_ABBREV_SUBRANGE_TYPE 9
#define DWARF_ABBREV_TYPEDEF 10
#define DWARF_ABBREV_ENUMERATOR_SIGNED 11
#define DWARF_ABBREV_ENUMERATOR_UNSIGNED 12
#define DWARF_ABBREV_ENUMERATION_TYPE 13
#define DWARF_ABBREV_MEMBER 14
#define DWARF_ABBREV_MEMBER_BF 15
#define DWARF_ABBREV_STRUCTURE_TYPE 16
#define DWARF_ABBREV_STRUCTURE_EMPTY_TYPE 17
#define DWARF_ABBREV_UNION_TYPE 18
#define DWARF_ABBREV_UNION_EMPTY_TYPE 19
#define DWARF_ABBREV_SUBPROGRAM_EXTERNAL 20
#define DWARF_ABBREV_SUBPROGRAM_STATIC 21
#define DWARF_ABBREV_LEXICAL_BLOCK 22
#define DWARF_ABBREV_LEXICAL_EMPTY_BLOCK 23
#define DWARF_ABBREV_SUBROUTINE_TYPE 24
#define DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE 25
#define DWARF_ABBREV_FORMAL_PARAMETER2 26
/* all entries should have been generated with dwarf_uleb128 except
has_children. All values are currently below 128 so this currently
works. */
static const unsigned char dwarf_abbrev_init[] = {
DWARF_ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, 1,
DW_AT_producer, DW_FORM_strp,
DW_AT_language, DW_FORM_data1,
DW_AT_name, DW_FORM_line_strp,
DW_AT_comp_dir, DW_FORM_line_strp,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
DW_AT_stmt_list, DW_FORM_sec_offset,
0, 0,
DWARF_ABBREV_BASE_TYPE, DW_TAG_base_type, 0,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_encoding, DW_FORM_data1,
DW_AT_name, DW_FORM_strp,
0, 0,
DWARF_ABBREV_VARIABLE_EXTERNAL, DW_TAG_variable, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_external, DW_FORM_flag,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_VARIABLE_STATIC, DW_TAG_variable, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_VARIABLE_LOCAL, DW_TAG_variable, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_type, DW_FORM_ref4,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_FORMAL_PARAMETER, DW_TAG_formal_parameter, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_type, DW_FORM_ref4,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_POINTER, DW_TAG_pointer_type, 0,
DW_AT_byte_size, DW_FORM_data1,
DW_AT_type, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_ARRAY_TYPE, DW_TAG_array_type, 1,
DW_AT_type, DW_FORM_ref4,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_SUBRANGE_TYPE, DW_TAG_subrange_type, 0,
DW_AT_type, DW_FORM_ref4,
DW_AT_upper_bound, DW_FORM_udata,
0, 0,
DWARF_ABBREV_TYPEDEF, DW_TAG_typedef, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_ENUMERATOR_SIGNED, DW_TAG_enumerator, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_const_value, DW_FORM_sdata,
0, 0,
DWARF_ABBREV_ENUMERATOR_UNSIGNED, DW_TAG_enumerator, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_const_value, DW_FORM_udata,
0, 0,
DWARF_ABBREV_ENUMERATION_TYPE, DW_TAG_enumeration_type, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_encoding, DW_FORM_data1,
DW_AT_byte_size, DW_FORM_data1,
DW_AT_type, DW_FORM_ref4,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_MEMBER, DW_TAG_member, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_data_member_location, DW_FORM_udata,
0, 0,
DWARF_ABBREV_MEMBER_BF, DW_TAG_member, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_bit_size, DW_FORM_udata,
DW_AT_data_bit_offset, DW_FORM_udata,
0, 0,
DWARF_ABBREV_STRUCTURE_TYPE, DW_TAG_structure_type, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_STRUCTURE_EMPTY_TYPE, DW_TAG_structure_type, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
0, 0,
DWARF_ABBREV_UNION_TYPE, DW_TAG_union_type, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_UNION_EMPTY_TYPE, DW_TAG_union_type, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
0, 0,
DWARF_ABBREV_SUBPROGRAM_EXTERNAL, DW_TAG_subprogram, 1,
DW_AT_external, DW_FORM_flag,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
DW_AT_sibling, DW_FORM_ref4,
DW_AT_frame_base, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_SUBPROGRAM_STATIC, DW_TAG_subprogram, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
DW_AT_sibling, DW_FORM_ref4,
DW_AT_frame_base, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_LEXICAL_BLOCK, DW_TAG_lexical_block, 1,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
0, 0,
DWARF_ABBREV_LEXICAL_EMPTY_BLOCK, DW_TAG_lexical_block, 0,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
0, 0,
DWARF_ABBREV_SUBROUTINE_TYPE, DW_TAG_subroutine_type, 1,
DW_AT_type, DW_FORM_ref4,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE, DW_TAG_subroutine_type, 0,
DW_AT_type, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_FORMAL_PARAMETER2, DW_TAG_formal_parameter, 0,
DW_AT_type, DW_FORM_ref4,
0, 0,
0
};
static const unsigned char dwarf_line_opcodes[] = {
0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1
};
/* ------------------------------------------------------------------------- */
/* debug state */
struct _tccdbg {
int last_line_num, new_file;
int section_sym;
int debug_next_type;
struct _debug_hash {
int debug_type;
Sym *type;
} *debug_hash;
struct _debug_anon_hash {
Sym *type;
int n_debug_type;
int *debug_type;
} *debug_anon_hash;
int n_debug_hash;
int n_debug_anon_hash;
struct _debug_info {
int start;
int end;
int n_sym;
struct debug_sym {
int type;
unsigned long value;
char *str;
Section *sec;
int sym_index;
int info;
int file;
int line;
} *sym;
struct _debug_info *child, *next, *last, *parent;
} *debug_info, *debug_info_root;
struct {
int info;
int abbrev;
int line;
int str;
int line_str;
} dwarf_sym;
struct {
int start;
int dir_size;
char **dir_table;
int filename_size;
struct dwarf_filename_struct {
int dir_entry;
char *name;
} *filename_table;
int line_size;
int line_max_size;
unsigned char *line_data;
int cur_file;
int last_file;
int last_pc;
int last_line;
} dwarf_line;
struct {
int start;
Sym *func;
int line;
int base_type_used[N_DEFAULT_DEBUG];
} dwarf_info;
/* test coverage */
struct {
unsigned long offset;
unsigned long last_file_name;
unsigned long last_func_name;
int ind;
int line;
} tcov_data;
};
#define last_line_num s1->dState->last_line_num
#define new_file s1->dState->new_file
#define section_sym s1->dState->section_sym
#define debug_next_type s1->dState->debug_next_type
#define debug_hash s1->dState->debug_hash
#define debug_anon_hash s1->dState->debug_anon_hash
#define n_debug_hash s1->dState->n_debug_hash
#define n_debug_anon_hash s1->dState->n_debug_anon_hash
#define debug_info s1->dState->debug_info
#define debug_info_root s1->dState->debug_info_root
#define dwarf_sym s1->dState->dwarf_sym
#define dwarf_line s1->dState->dwarf_line
#define dwarf_info s1->dState->dwarf_info
#define tcov_data s1->dState->tcov_data
#define FDE_ENCODING (DW_EH_PE_udata4 | DW_EH_PE_signed | DW_EH_PE_pcrel)
/* ------------------------------------------------------------------------- */
static void put_stabs(TCCState *s1, const char *str, int type, int other,
int desc, unsigned long value);
ST_FUNC void tcc_debug_new(TCCState *s1)
{
int shf = 0;
if (!s1->dState)
s1->dState = tcc_mallocz(sizeof *s1->dState);
#ifdef CONFIG_TCC_BACKTRACE
/* include stab info with standalone backtrace support */
if (s1->do_debug && s1->output_type == TCC_OUTPUT_MEMORY)
s1->do_backtrace = 1;
if (s1->do_backtrace)
shf = SHF_ALLOC | SHF_WRITE; // SHF_WRITE needed for musl/SELINUX
#endif
if (s1->dwarf) {
s1->dwlo = s1->nb_sections;
dwarf_info_section =
new_section(s1, ".debug_info", SHT_PROGBITS, shf);
dwarf_abbrev_section =
new_section(s1, ".debug_abbrev", SHT_PROGBITS, shf);
dwarf_line_section =
new_section(s1, ".debug_line", SHT_PROGBITS, shf);
dwarf_aranges_section =
new_section(s1, ".debug_aranges", SHT_PROGBITS, shf);
shf |= SHF_MERGE | SHF_STRINGS;
dwarf_str_section =
new_section(s1, ".debug_str", SHT_PROGBITS, shf);
dwarf_str_section->sh_entsize = 1;
dwarf_info_section->sh_addralign =
dwarf_abbrev_section->sh_addralign =
dwarf_line_section->sh_addralign =
dwarf_aranges_section->sh_addralign =
dwarf_str_section->sh_addralign = 1;
if (s1->dwarf >= 5) {
dwarf_line_str_section =
new_section(s1, ".debug_line_str", SHT_PROGBITS, shf);
dwarf_line_str_section->sh_entsize = 1;
dwarf_line_str_section->sh_addralign = 1;
}
s1->dwhi = s1->nb_sections;
}
else
{
stab_section = new_section(s1, ".stab", SHT_PROGBITS, shf);
stab_section->sh_entsize = sizeof(Stab_Sym);
stab_section->sh_addralign = sizeof ((Stab_Sym*)0)->n_value;
stab_section->link = new_section(s1, ".stabstr", SHT_STRTAB, shf);
/* put first entry */
put_stabs(s1, "", 0, 0, 0, 0);
}
}
/* put stab debug information */
static void put_stabs(TCCState *s1, const char *str, int type, int other, int desc,
unsigned long value)
{
Stab_Sym *sym;
unsigned offset;
if (type == N_SLINE
&& (offset = stab_section->data_offset)
&& (sym = (Stab_Sym*)(stab_section->data + offset) - 1)
&& sym->n_type == type
&& sym->n_value == value) {
/* just update line_number in previous entry */
sym->n_desc = desc;
return;
}
sym = section_ptr_add(stab_section, sizeof(Stab_Sym));
if (str) {
sym->n_strx = put_elf_str(stab_section->link, str);
} else {
sym->n_strx = 0;
}
sym->n_type = type;
sym->n_other = other;
sym->n_desc = desc;
sym->n_value = value;
}
static void put_stabs_r(TCCState *s1, const char *str, int type, int other, int desc,
unsigned long value, Section *sec, int sym_index)
{
put_elf_reloc(symtab_section, stab_section,
stab_section->data_offset + 8,
sizeof ((Stab_Sym*)0)->n_value == PTR_SIZE ? R_DATA_PTR : R_DATA_32,
sym_index);
put_stabs(s1, str, type, other, desc, value);
}
static void put_stabn(TCCState *s1, int type, int other, int desc, int value)
{
put_stabs(s1, NULL, type, other, desc, value);
}
/* ------------------------------------------------------------------------- */
#define dwarf_data1(s,data) \
{ unsigned char *p = section_ptr_add((s), 1); *p = (data); }
#define dwarf_data2(s,data) \
write16le(section_ptr_add((s), 2), (data))
#define dwarf_data4(s,data) \
write32le(section_ptr_add((s), 4), (data))
#define dwarf_data8(s,data) \
write64le(section_ptr_add((s), 8), (data))
static int dwarf_get_section_sym(Section *s)
{
TCCState *s1 = s->s1;
return put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
s->sh_num, NULL);
}
static void dwarf_reloc(Section *s, int sym, int rel)
{
TCCState *s1 = s->s1;
put_elf_reloca(symtab_section, s, s->data_offset, rel, sym, 0);
}
static void dwarf_string(Section *s, Section *dw, int sym, const char *str)
{
TCCState *s1 = s->s1;
int offset, len;
char *ptr;
len = strlen(str) + 1;
offset = dw->data_offset;
ptr = section_ptr_add(dw, len);
memmove(ptr, str, len);
put_elf_reloca(symtab_section, s, s->data_offset, R_DATA_32DW, sym,
PTR_SIZE == 4 ? 0 : offset);
dwarf_data4(s, PTR_SIZE == 4 ? offset : 0);
}
static void dwarf_strp(Section *s, const char *str)
{
TCCState *s1 = s->s1;
dwarf_string(s, dwarf_str_section, dwarf_sym.str, str);
}
static void dwarf_line_strp(Section *s, const char *str)
{
TCCState *s1 = s->s1;
dwarf_string(s, dwarf_line_str_section, dwarf_sym.line_str, str);
}
static void dwarf_line_op(TCCState *s1, unsigned char op)
{
if (dwarf_line.line_size >= dwarf_line.line_max_size) {
dwarf_line.line_max_size += 1024;
dwarf_line.line_data =
(unsigned char *)tcc_realloc(dwarf_line.line_data,
dwarf_line.line_max_size);
}
dwarf_line.line_data[dwarf_line.line_size++] = op;
}
static void dwarf_file(TCCState *s1)
{
int i, j;
char *filename;
int index_offset = s1->dwarf < 5;
if (!strcmp(file->filename, "<command line>")) {
dwarf_line.cur_file = 1;
return;
}
filename = strrchr(file->filename, '/');
if (filename == NULL) {
for (i = 1; i < dwarf_line.filename_size; i++)
if (dwarf_line.filename_table[i].dir_entry == 0 &&
strcmp(dwarf_line.filename_table[i].name,
file->filename) == 0) {
dwarf_line.cur_file = i + index_offset;
return;
}
i = -index_offset;
filename = file->filename;
}
else {
char *undo = filename;
char *dir = file->filename;
*filename++ = '\0';
for (i = 0; i < dwarf_line.dir_size; i++)
if (strcmp(dwarf_line.dir_table[i], dir) == 0) {
for (j = 1; j < dwarf_line.filename_size; j++)
if (dwarf_line.filename_table[j].dir_entry - index_offset
== i &&
strcmp(dwarf_line.filename_table[j].name,
filename) == 0) {
*undo = '/';
dwarf_line.cur_file = j + index_offset;
return;
}
break;
}
if (i == dwarf_line.dir_size) {
dwarf_line.dir_size++;
dwarf_line.dir_table =
(char **) tcc_realloc(dwarf_line.dir_table,
dwarf_line.dir_size *
sizeof (char *));
dwarf_line.dir_table[i] = tcc_strdup(dir);
}
*undo = '/';
}
dwarf_line.filename_table =
(struct dwarf_filename_struct *)
tcc_realloc(dwarf_line.filename_table,
(dwarf_line.filename_size + 1) *
sizeof (struct dwarf_filename_struct));
dwarf_line.filename_table[dwarf_line.filename_size].dir_entry =
i + index_offset;
dwarf_line.filename_table[dwarf_line.filename_size].name =
tcc_strdup(filename);
dwarf_line.cur_file = dwarf_line.filename_size++ + index_offset;
return;
}
#if 0
static int dwarf_uleb128_size (unsigned long long value)
{
int size = 0;
do {
value >>= 7;
size++;
} while (value != 0);
return size;
}
#endif
static int dwarf_sleb128_size (long long value)
{
int size = 0;
long long end = value >> 63;
unsigned char last = end & 0x40;
unsigned char byte;
do {
byte = value & 0x7f;
value >>= 7;
size++;
} while (value != end || (byte & 0x40) != last);
return size;
}
static void dwarf_uleb128 (Section *s, unsigned long long value)
{
do {
unsigned char byte = value & 0x7f;
value >>= 7;
dwarf_data1(s, byte | (value ? 0x80 : 0));
} while (value != 0);
}
static void dwarf_sleb128 (Section *s, long long value)
{
int more;
long long end = value >> 63;
unsigned char last = end & 0x40;
do {
unsigned char byte = value & 0x7f;
value >>= 7;
more = value != end || (byte & 0x40) != last;
dwarf_data1(s, byte | (0x80 * more));
} while (more);
}
static void dwarf_uleb128_op (TCCState *s1, unsigned long long value)
{
do {
unsigned char byte = value & 0x7f;
value >>= 7;
dwarf_line_op(s1, byte | (value ? 0x80 : 0));
} while (value != 0);
}
static void dwarf_sleb128_op (TCCState *s1, long long value)
{
int more;
long long end = value >> 63;
unsigned char last = end & 0x40;
do {
unsigned char byte = value & 0x7f;
value >>= 7;
more = value != end || (byte & 0x40) != last;
dwarf_line_op(s1, byte | (0x80 * more));
} while (more);
}
ST_FUNC void tcc_eh_frame_start(TCCState *s1)
{
#if !(defined _WIN32 || defined __APPLE__ || defined TCC_TARGET_ARM || \
defined TARGETOS_BSD)
eh_frame_section = new_section(s1, ".eh_frame", SHT_PROGBITS, SHF_ALLOC);
s1->eh_start = eh_frame_section->data_offset;
dwarf_data4(eh_frame_section, 0); // length
dwarf_data4(eh_frame_section, 0); // CIE ID
dwarf_data1(eh_frame_section, 1); // Version
dwarf_data1(eh_frame_section, 'z'); // Augmentation String
dwarf_data1(eh_frame_section, 'R');
dwarf_data1(eh_frame_section, 0);
#if defined TCC_TARGET_I386
dwarf_uleb128(eh_frame_section, 1); // code_alignment_factor
dwarf_sleb128(eh_frame_section, -4); // data_alignment_factor
dwarf_uleb128(eh_frame_section, 8); // return address column
dwarf_uleb128(eh_frame_section, 1); // Augmentation len
dwarf_data1(eh_frame_section, FDE_ENCODING);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 4); // r4 (esp)
dwarf_uleb128(eh_frame_section, 4); // ofs 4
dwarf_data1(eh_frame_section, DW_CFA_offset + 8); // r8 (eip)
dwarf_uleb128(eh_frame_section, 1); // cfa-4
#elif defined TCC_TARGET_X86_64
dwarf_uleb128(eh_frame_section, 1); // code_alignment_factor
dwarf_sleb128(eh_frame_section, -8); // data_alignment_factor
dwarf_uleb128(eh_frame_section, 16); // return address column
dwarf_uleb128(eh_frame_section, 1); // Augmentation len
dwarf_data1(eh_frame_section, FDE_ENCODING);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 7); // r7 (rsp)
dwarf_uleb128(eh_frame_section, 8); // ofs 8
dwarf_data1(eh_frame_section, DW_CFA_offset + 16); // r16 (rip)
dwarf_uleb128(eh_frame_section, 1); // cfa-8
#elif defined TCC_TARGET_ARM
/* TODO: arm must be compiled with: -funwind-tables */
/* arm also uses .ARM.extab and .ARM.exidx sections */
dwarf_uleb128(eh_frame_section, 2); // code_alignment_factor
dwarf_sleb128(eh_frame_section, -4); // data_alignment_factor
dwarf_uleb128(eh_frame_section, 14); // return address column
dwarf_uleb128(eh_frame_section, 1); // Augmentation len
dwarf_data1(eh_frame_section, FDE_ENCODING);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 13); // r13 (sp)
dwarf_uleb128(eh_frame_section, 0); // ofs 0
#elif defined TCC_TARGET_ARM64
dwarf_uleb128(eh_frame_section, 4); // code_alignment_factor
dwarf_sleb128(eh_frame_section, -8); // data_alignment_factor
dwarf_uleb128(eh_frame_section, 30); // return address column
dwarf_uleb128(eh_frame_section, 1); // Augmentation len
dwarf_data1(eh_frame_section, FDE_ENCODING);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 31); // x31 (sp)
dwarf_uleb128(eh_frame_section, 0); // ofs 0
#elif defined TCC_TARGET_RISCV64
eh_frame_section->data[s1->eh_start + 8] = 3; // version = 3
dwarf_uleb128(eh_frame_section, 1); // code_alignment_factor
dwarf_sleb128(eh_frame_section, -4); // data_alignment_factor
dwarf_uleb128(eh_frame_section, 1); // return address column
dwarf_uleb128(eh_frame_section, 1); // Augmentation len
dwarf_data1(eh_frame_section, FDE_ENCODING);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 2); // r2 (sp)
dwarf_uleb128(eh_frame_section, 0); // ofs 0
#endif
while ((eh_frame_section->data_offset - s1->eh_start) & 3)
dwarf_data1(eh_frame_section, DW_CFA_nop);
write32le(eh_frame_section->data + s1->eh_start, // length
eh_frame_section->data_offset - s1->eh_start - 4);
#endif
}
static void tcc_debug_frame_end(TCCState *s1, int size)
{
int eh_section_sym;
unsigned long fde_start;
if (!eh_frame_section)
return;
eh_section_sym = dwarf_get_section_sym(text_section);
fde_start = eh_frame_section->data_offset;
dwarf_data4(eh_frame_section, 0); // length
dwarf_data4(eh_frame_section,
fde_start - s1->eh_start + 4); // CIE Pointer
#if TCC_TARGET_I386
dwarf_reloc(eh_frame_section, eh_section_sym, R_386_PC32);
#elif defined TCC_TARGET_X86_64
dwarf_reloc(eh_frame_section, eh_section_sym, R_X86_64_PC32);
#elif defined TCC_TARGET_ARM
dwarf_reloc(eh_frame_section, eh_section_sym, R_ARM_REL32);
#elif defined TCC_TARGET_ARM64
dwarf_reloc(eh_frame_section, eh_section_sym, R_AARCH64_PREL32);
#elif defined TCC_TARGET_RISCV64
dwarf_reloc(eh_frame_section, eh_section_sym, R_RISCV_32_PCREL);
#endif
dwarf_data4(eh_frame_section, func_ind); // PC Begin
dwarf_data4(eh_frame_section, size); // PC Range
dwarf_data1(eh_frame_section, 0); // Augmentation Length
#if TCC_TARGET_I386
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 1);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 8);
dwarf_data1(eh_frame_section, DW_CFA_offset + 5); // r5 (ebp)
dwarf_uleb128(eh_frame_section, 2); // cfa-8
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 2);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_register);
dwarf_uleb128(eh_frame_section, 5); // r5 (ebp)
dwarf_data1(eh_frame_section, DW_CFA_advance_loc4);
dwarf_data4(eh_frame_section, size - 5);
dwarf_data1(eh_frame_section, DW_CFA_restore + 5); // r5 (ebp)
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 4); // r4 (esp)
dwarf_uleb128(eh_frame_section, 4); // ofs 4
#elif defined TCC_TARGET_X86_64
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 1);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 16);
dwarf_data1(eh_frame_section, DW_CFA_offset + 6); // r6 (rbp)
dwarf_uleb128(eh_frame_section, 2); // cfa-16
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 3);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_register);
dwarf_uleb128(eh_frame_section, 6); // r6 (rbp)
dwarf_data1(eh_frame_section, DW_CFA_advance_loc4);
dwarf_data4(eh_frame_section, size - 5);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 7); // r7 (rsp)
dwarf_uleb128(eh_frame_section, 8); // ofs 8
#elif defined TCC_TARGET_ARM
/* TODO */
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 2);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 8);
dwarf_data1(eh_frame_section, DW_CFA_offset + 14); // r14 (lr)
dwarf_uleb128(eh_frame_section, 1);
dwarf_data1(eh_frame_section, DW_CFA_offset + 11); // r11 (fp)
dwarf_uleb128(eh_frame_section, 2);
dwarf_data1(eh_frame_section, DW_CFA_advance_loc4);
dwarf_data4(eh_frame_section, size / 2 - 5);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_register);
dwarf_uleb128(eh_frame_section, 11); // r11 (fp)
#elif defined TCC_TARGET_ARM64
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 1);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 224);
dwarf_data1(eh_frame_section, DW_CFA_offset + 29); // x29 (fp)
dwarf_uleb128(eh_frame_section, 28); // cfa-224
dwarf_data1(eh_frame_section, DW_CFA_offset + 30); // x30 (lr)
dwarf_uleb128(eh_frame_section, 27); // cfa-216
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 3);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 224 + ((-loc + 15) & ~15));
dwarf_data1(eh_frame_section, DW_CFA_advance_loc4);
dwarf_data4(eh_frame_section, size / 4 - 5);
dwarf_data1(eh_frame_section, DW_CFA_restore + 30); // x30 (lr)
dwarf_data1(eh_frame_section, DW_CFA_restore + 29); // x29 (fp)
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 0);
#elif defined TCC_TARGET_RISCV64
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 4);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 16); // ofs 16
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 8);
dwarf_data1(eh_frame_section, DW_CFA_offset + 1); // r1 (ra, lr)
dwarf_uleb128(eh_frame_section, 2); // cfa-8
dwarf_data1(eh_frame_section, DW_CFA_offset + 8); // r8 (s0, fp)
dwarf_uleb128(eh_frame_section, 4); // cfa-16
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 8);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 8); // r8 (s0, fp)
dwarf_uleb128(eh_frame_section, 0); // ofs 0
dwarf_data1(eh_frame_section, DW_CFA_advance_loc4);
while (size >= 4 &&
read32le(cur_text_section->data + func_ind + size - 4) != 0x00008067)
size -= 4;
dwarf_data4(eh_frame_section, size - 36);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa);
dwarf_uleb128(eh_frame_section, 2); // r2 (r2, sp)
dwarf_uleb128(eh_frame_section, 16); // ofs 16
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 4);
dwarf_data1(eh_frame_section, DW_CFA_restore + 1); // r1 (lr)
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 4);
dwarf_data1(eh_frame_section, DW_CFA_restore + 8); // r8 (s0, fp)
dwarf_data1(eh_frame_section, DW_CFA_advance_loc + 4);
dwarf_data1(eh_frame_section, DW_CFA_def_cfa_offset);
dwarf_uleb128(eh_frame_section, 0); // ofs 0
#endif
while ((eh_frame_section->data_offset - fde_start) & 3)
dwarf_data1(eh_frame_section, DW_CFA_nop);
write32le(eh_frame_section->data + fde_start, // length
eh_frame_section->data_offset - fde_start - 4);
}
ST_FUNC void tcc_eh_frame_end(TCCState *s1)
{
if (!eh_frame_section)
return;
dwarf_data4(eh_frame_section, 0);
}
struct eh_search_table {
uint32_t pc_offset;
uint32_t fde_offset;
};
static int sort_eh_table(const void *a, const void *b)
{
uint32_t pc1 = ((const struct eh_search_table *)a)->pc_offset;
uint32_t pc2 = ((const struct eh_search_table *)b)->pc_offset;
return pc1 < pc2 ? -1 : pc1 > pc2 ? 1 : 0;
}
ST_FUNC void tcc_eh_frame_hdr(TCCState *s1, int final)
{
int count = 0, offset;
unsigned long count_offset, tab_offset;
unsigned char *ln, *end;
unsigned int last_cie_offset = 0xffffffff;
if (!eh_frame_section || !eh_frame_section->data_offset)
return;
if (final && !eh_frame_hdr_section)
return;
if (final == 0)
eh_frame_hdr_section =
new_section(s1, ".eh_frame_hdr", SHT_PROGBITS, SHF_ALLOC);
eh_frame_hdr_section->data_offset = 0;
dwarf_data1(eh_frame_hdr_section, 1); // Version
// Pointer Encoding Format
dwarf_data1(eh_frame_hdr_section, DW_EH_PE_sdata4 | DW_EH_PE_pcrel);
// Count Encoding Format
dwarf_data1(eh_frame_hdr_section, DW_EH_PE_udata4 | DW_EH_PE_absptr);
// Table Encoding Format
dwarf_data1(eh_frame_hdr_section, DW_EH_PE_sdata4 | DW_EH_PE_datarel);
offset = eh_frame_section->sh_addr -
eh_frame_hdr_section->sh_addr -
eh_frame_hdr_section->data_offset;
dwarf_data4(eh_frame_hdr_section, offset); // eh_frame_ptr
// Count
count_offset = eh_frame_hdr_section->data_offset;
dwarf_data4(eh_frame_hdr_section, 0);
tab_offset = eh_frame_hdr_section->data_offset;
ln = eh_frame_section->data;
end = eh_frame_section->data + eh_frame_section->data_offset;
while (ln < end) {
unsigned char *fde = ln, *rd = ln;
unsigned int cie_offset, version, length = dwarf_read_4(rd, end);
unsigned int pc_offset, fde_offset;
if (length == 0)
goto next;
cie_offset = dwarf_read_4(rd, end);
if (cie_offset == 0)
goto next;
if (cie_offset != last_cie_offset) {
unsigned char *cie = rd - cie_offset + 4;
if (cie < eh_frame_section->data)
goto next;
version = dwarf_read_1(cie, end);
if ((version == 1 || version == 3) &&
dwarf_read_1(cie, end) == 'z' && // Augmentation String
dwarf_read_1(cie, end) == 'R' &&
dwarf_read_1(cie, end) == 0) {
dwarf_read_uleb128(&cie, end); // code_alignment_factor
dwarf_read_sleb128(&cie, end); // data_alignment_factor
dwarf_read_1(cie, end); // return address column
if (dwarf_read_uleb128(&cie, end) == 1 &&
dwarf_read_1(cie, end) == FDE_ENCODING) {
last_cie_offset = cie_offset;
}
else
goto next;
}
else
goto next;
}
count++;
fde_offset = eh_frame_section->sh_addr +
(fde - eh_frame_section->data) -
eh_frame_hdr_section->sh_addr;
pc_offset = dwarf_read_4(rd, end) + fde_offset + 8;
dwarf_data4(eh_frame_hdr_section, pc_offset);
dwarf_data4(eh_frame_hdr_section, fde_offset);
next:
ln += length + 4;
}
add32le(eh_frame_hdr_section->data + count_offset, count);
qsort(eh_frame_hdr_section->data + tab_offset, count,
sizeof(struct eh_search_table), sort_eh_table);
}
/* start of translation unit info */
ST_FUNC void tcc_debug_start(TCCState *s1)
{
int i;
char buf[512];
char *filename;
/* we might currently #include the <command-line> */
filename = file->prev ? file->prev->filename : file->filename;
/* an elf symbol of type STT_FILE must be put so that STB_LOCAL
symbols can be safely used */
put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
SHN_ABS, filename);
if (s1->do_debug) {
new_file = last_line_num = 0;
debug_next_type = N_DEFAULT_DEBUG;
debug_hash = NULL;
debug_anon_hash = NULL;
n_debug_hash = 0;
n_debug_anon_hash = 0;
getcwd(buf, sizeof(buf));
#ifdef _WIN32
normalize_slashes(buf);
#endif
if (s1->dwarf) {
int start_abbrev;
unsigned char *ptr;
char *undo;
/* dwarf_abbrev */
start_abbrev = dwarf_abbrev_section->data_offset;
ptr = section_ptr_add(dwarf_abbrev_section, sizeof(dwarf_abbrev_init));
memcpy(ptr, dwarf_abbrev_init, sizeof(dwarf_abbrev_init));
if (s1->dwarf < 5) {
while (*ptr) {
ptr += 3;
while (*ptr) {
if (ptr[1] == DW_FORM_line_strp)
ptr[1] = DW_FORM_strp;
if (s1->dwarf < 4) {
/* These are compatable for DW_TAG_compile_unit
DW_AT_stmt_list. */
if (ptr[1] == DW_FORM_sec_offset)
ptr[1] = DW_FORM_data4;
/* This code uses only size < 0x80 so these are
compatible. */
if (ptr[1] == DW_FORM_exprloc)
ptr[1] = DW_FORM_block1;
}
ptr += 2;
}
ptr += 2;
}
}
dwarf_sym.info = dwarf_get_section_sym(dwarf_info_section);
dwarf_sym.abbrev = dwarf_get_section_sym(dwarf_abbrev_section);
dwarf_sym.line = dwarf_get_section_sym(dwarf_line_section);
dwarf_sym.str = dwarf_get_section_sym(dwarf_str_section);
if (tcc_state->dwarf >= 5)
dwarf_sym.line_str = dwarf_get_section_sym(dwarf_line_str_section);
else {
dwarf_line_str_section = dwarf_str_section;
dwarf_sym.line_str = dwarf_sym.str;
}
section_sym = dwarf_get_section_sym(text_section);
/* dwarf_info */
dwarf_info.start = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0); // size
dwarf_data2(dwarf_info_section, s1->dwarf); // version
if (s1->dwarf >= 5) {
dwarf_data1(dwarf_info_section, DW_UT_compile); // unit type
dwarf_data1(dwarf_info_section, PTR_SIZE);
dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
dwarf_data4(dwarf_info_section, start_abbrev);
}
else {
dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
dwarf_data4(dwarf_info_section, start_abbrev);
dwarf_data1(dwarf_info_section, PTR_SIZE);
}
dwarf_data1(dwarf_info_section, DWARF_ABBREV_COMPILE_UNIT);
dwarf_strp(dwarf_info_section, "tcc " TCC_VERSION);
dwarf_data1(dwarf_info_section, s1->cversion == 201112 ? DW_LANG_C11 : DW_LANG_C99);
dwarf_line_strp(dwarf_info_section, filename);
dwarf_line_strp(dwarf_info_section, buf);
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, ind); // low pc
dwarf_data4(dwarf_info_section, 0); // high pc
#else
dwarf_data8(dwarf_info_section, ind); // low pc
dwarf_data8(dwarf_info_section, 0); // high pc
#endif
dwarf_reloc(dwarf_info_section, dwarf_sym.line, R_DATA_32DW);
dwarf_data4(dwarf_info_section, dwarf_line_section->data_offset); // stmt_list
/* dwarf_line */
dwarf_line.start = dwarf_line_section->data_offset;
dwarf_data4(dwarf_line_section, 0); // length
dwarf_data2(dwarf_line_section, s1->dwarf); // version
if (s1->dwarf >= 5) {
dwarf_data1(dwarf_line_section, PTR_SIZE); // address size
dwarf_data1(dwarf_line_section, 0); // segment selector
}
dwarf_data4(dwarf_line_section, 0); // prologue Length
dwarf_data1(dwarf_line_section, DWARF_MIN_INSTR_LEN);
if (s1->dwarf >= 4)
dwarf_data1(dwarf_line_section, 1); // maximum ops per instruction
dwarf_data1(dwarf_line_section, 1); // Initial value of 'is_stmt'
dwarf_data1(dwarf_line_section, DWARF_LINE_BASE);
dwarf_data1(dwarf_line_section, DWARF_LINE_RANGE);
dwarf_data1(dwarf_line_section, DWARF_OPCODE_BASE);
ptr = section_ptr_add(dwarf_line_section, sizeof(dwarf_line_opcodes));
memcpy(ptr, dwarf_line_opcodes, sizeof(dwarf_line_opcodes));
undo = strrchr(filename, '/');
if (undo)
*undo = 0;
dwarf_line.dir_size = 1 + (undo != NULL);
dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *) *
dwarf_line.dir_size);
dwarf_line.dir_table[0] = tcc_strdup(buf);
if (undo)
dwarf_line.dir_table[1] = tcc_strdup(filename);
dwarf_line.filename_size = 2;
dwarf_line.filename_table =
(struct dwarf_filename_struct *)
tcc_malloc(2*sizeof (struct dwarf_filename_struct));
dwarf_line.filename_table[0].dir_entry = 0;
if (undo) {
dwarf_line.filename_table[0].name = tcc_strdup(undo + 1);
dwarf_line.filename_table[1].dir_entry = 1;
dwarf_line.filename_table[1].name = tcc_strdup(undo + 1);
*undo = '/';
}
else {
dwarf_line.filename_table[0].name = tcc_strdup(filename);
dwarf_line.filename_table[1].dir_entry = 0;
dwarf_line.filename_table[1].name = tcc_strdup(filename);
}
dwarf_line.line_size = dwarf_line.line_max_size = 0;
dwarf_line.line_data = NULL;
dwarf_line.cur_file = 1;
dwarf_line.last_file = 0;
dwarf_line.last_pc = 0;
dwarf_line.last_line = 1;
dwarf_line_op(s1, 0); // extended
dwarf_uleb128_op(s1, 1 + PTR_SIZE); // extended size
dwarf_line_op(s1, DW_LNE_set_address);
for (i = 0; i < PTR_SIZE; i++)
dwarf_line_op(s1, 0);
memset(&dwarf_info.base_type_used, 0, sizeof(dwarf_info.base_type_used));
}
else
{
/* file info: full path + filename */
pstrcat(buf, sizeof(buf), "/");
section_sym = put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
text_section->sh_num, NULL);
put_stabs_r(s1, buf, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
put_stabs_r(s1, filename, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
for (i = 0; i < N_DEFAULT_DEBUG; i++)
put_stabs(s1, default_debug[i].name, N_LSYM, 0, 0, 0);
}
/* we're currently 'including' the <command line> */
tcc_debug_bincl(s1);
}
}
/* put end of translation unit info */
ST_FUNC void tcc_debug_end(TCCState *s1)
{
if (!s1->do_debug || debug_next_type == 0)
return;
if (debug_info_root)
tcc_debug_funcend(s1, 0); /* free stuff in case of errors */
if (s1->dwarf) {
int i, j;
int start_aranges;
unsigned char *ptr;
int text_size = text_section->data_offset;
/* dwarf_info */
for (i = 0; i < n_debug_anon_hash; i++) {
Sym *t = debug_anon_hash[i].type;
int pos = dwarf_info_section->data_offset;
dwarf_data1(dwarf_info_section,
IS_UNION (t->type.t) ? DWARF_ABBREV_UNION_EMPTY_TYPE
: DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
dwarf_strp(dwarf_info_section,
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
dwarf_uleb128(dwarf_info_section, 0);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
write32le(dwarf_info_section->data +
debug_anon_hash[i].debug_type[j],
pos - dwarf_info.start);
tcc_free (debug_anon_hash[i].debug_type);
}
tcc_free (debug_anon_hash);
dwarf_data1(dwarf_info_section, 0);
ptr = dwarf_info_section->data + dwarf_info.start;
write32le(ptr, dwarf_info_section->data_offset - dwarf_info.start - 4);
write32le(ptr + 25 + (s1->dwarf >= 5) + PTR_SIZE, text_size);
/* dwarf_aranges */
start_aranges = dwarf_aranges_section->data_offset;
dwarf_data4(dwarf_aranges_section, 0); // size
dwarf_data2(dwarf_aranges_section, 2); // version
dwarf_reloc(dwarf_aranges_section, dwarf_sym.info, R_DATA_32DW);
dwarf_data4(dwarf_aranges_section, 0); // dwarf_info
#if PTR_SIZE == 4
dwarf_data1(dwarf_aranges_section, 4); // address size
#else
dwarf_data1(dwarf_aranges_section, 8); // address size
#endif
dwarf_data1(dwarf_aranges_section, 0); // segment selector size
dwarf_data4(dwarf_aranges_section, 0); // padding
dwarf_reloc(dwarf_aranges_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_aranges_section, 0); // Begin
dwarf_data4(dwarf_aranges_section, text_size); // End
dwarf_data4(dwarf_aranges_section, 0); // End list
dwarf_data4(dwarf_aranges_section, 0); // End list
#else
dwarf_data8(dwarf_aranges_section, 0); // Begin
dwarf_data8(dwarf_aranges_section, text_size); // End
dwarf_data8(dwarf_aranges_section, 0); // End list
dwarf_data8(dwarf_aranges_section, 0); // End list
#endif
ptr = dwarf_aranges_section->data + start_aranges;
write32le(ptr, dwarf_aranges_section->data_offset - start_aranges - 4);
/* dwarf_line */
if (s1->dwarf >= 5) {
dwarf_data1(dwarf_line_section, 1); /* col */
dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
dwarf_uleb128(dwarf_line_section, dwarf_line.dir_size);
for (i = 0; i < dwarf_line.dir_size; i++)
dwarf_line_strp(dwarf_line_section, dwarf_line.dir_table[i]);
dwarf_data1(dwarf_line_section, 2); /* col */
dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
dwarf_uleb128(dwarf_line_section, DW_LNCT_directory_index);
dwarf_uleb128(dwarf_line_section, DW_FORM_udata);
dwarf_uleb128(dwarf_line_section, dwarf_line.filename_size);
for (i = 0; i < dwarf_line.filename_size; i++) {
dwarf_line_strp(dwarf_line_section,
dwarf_line.filename_table[i].name);
dwarf_uleb128(dwarf_line_section,
dwarf_line.filename_table[i].dir_entry);
}
}
else {
int len;
for (i = 0; i < dwarf_line.dir_size; i++) {
len = strlen(dwarf_line.dir_table[i]) + 1;
ptr = section_ptr_add(dwarf_line_section, len);
memmove(ptr, dwarf_line.dir_table[i], len);
}
dwarf_data1(dwarf_line_section, 0); /* end dir */
for (i = 0; i < dwarf_line.filename_size; i++) {
len = strlen(dwarf_line.filename_table[i].name) + 1;
ptr = section_ptr_add(dwarf_line_section, len);
memmove(ptr, dwarf_line.filename_table[i].name, len);
dwarf_uleb128(dwarf_line_section,
dwarf_line.filename_table[i].dir_entry);
dwarf_uleb128(dwarf_line_section, 0); /* time */
dwarf_uleb128(dwarf_line_section, 0); /* size */
}
dwarf_data1(dwarf_line_section, 0); /* end file */
}
for (i = 0; i < dwarf_line.dir_size; i++)
tcc_free(dwarf_line.dir_table[i]);
tcc_free(dwarf_line.dir_table);
for (i = 0; i < dwarf_line.filename_size; i++)
tcc_free(dwarf_line.filename_table[i].name);
tcc_free(dwarf_line.filename_table);
dwarf_line_op(s1, 0); // extended
dwarf_uleb128_op(s1, 1); // extended size
dwarf_line_op(s1, DW_LNE_end_sequence);
i = (s1->dwarf >= 5) * 2;
write32le(&dwarf_line_section->data[dwarf_line.start + 6 + i],
dwarf_line_section->data_offset - dwarf_line.start - (10 + i));
section_ptr_add(dwarf_line_section, 3);
dwarf_reloc(dwarf_line_section, section_sym, R_DATA_PTR);
ptr = section_ptr_add(dwarf_line_section, dwarf_line.line_size - 3);
memmove(ptr - 3, dwarf_line.line_data, dwarf_line.line_size);
tcc_free(dwarf_line.line_data);
write32le(dwarf_line_section->data + dwarf_line.start,
dwarf_line_section->data_offset - dwarf_line.start - 4);
}
else
{
put_stabs_r(s1, NULL, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
}
tcc_free(debug_hash);
debug_next_type = 0;
}
static BufferedFile* put_new_file(TCCState *s1)
{
BufferedFile *f = file;
/* use upper file if from inline ":asm:" */
if (f->filename[0] == ':')
f = f->prev;
if (f && new_file) {
new_file = last_line_num = 0;
if (s1->dwarf)
dwarf_file(s1);
else
put_stabs_r(s1, f->filename, N_SOL, 0, 0, ind, text_section, section_sym);
}
return f;
}
/* put alternative filename */
ST_FUNC void tcc_debug_newfile(TCCState *s1)
{
if (!s1->do_debug)
return;
if (s1->dwarf)
dwarf_file(s1);
new_file = 1;
}
/* begin of #include */
ST_FUNC void tcc_debug_bincl(TCCState *s1)
{
if (!s1->do_debug)
return;
if (s1->dwarf)
dwarf_file(s1);
else
put_stabs(s1, file->filename, N_BINCL, 0, 0, 0);
new_file = 1;
}
/* end of #include */
ST_FUNC void tcc_debug_eincl(TCCState *s1)
{
if (!s1->do_debug)
return;
if (s1->dwarf)
dwarf_file(s1);
else
put_stabn(s1, N_EINCL, 0, 0, 0);
new_file = 1;
}
/* generate line number info */
ST_FUNC void tcc_debug_line(TCCState *s1)
{
BufferedFile *f;
if (!s1->do_debug)
return;
if (cur_text_section != text_section || nocode_wanted)
return;
f = put_new_file(s1);
if (!f)
return;
if (last_line_num == f->line_num)
return;
last_line_num = f->line_num;
if (s1->dwarf) {
int len_pc = (ind - dwarf_line.last_pc) / DWARF_MIN_INSTR_LEN;
int len_line = f->line_num - dwarf_line.last_line;
int n = len_pc * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
if (dwarf_line.cur_file != dwarf_line.last_file) {
dwarf_line.last_file = dwarf_line.cur_file;
dwarf_line_op(s1, DW_LNS_set_file);
dwarf_uleb128_op(s1, dwarf_line.cur_file);
}
if (len_pc &&
len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
n >= DWARF_OPCODE_BASE && n <= 255)
dwarf_line_op(s1, n);
else {
if (len_pc) {
n = len_pc * DWARF_LINE_RANGE + 0 + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
if (n >= DWARF_OPCODE_BASE && n <= 255)
dwarf_line_op(s1, n);
else {
dwarf_line_op(s1, DW_LNS_advance_pc);
dwarf_uleb128_op(s1, len_pc);
}
}
if (len_line) {
n = 0 * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
if (len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
n >= DWARF_OPCODE_BASE && n <= 255)
dwarf_line_op(s1, n);
else {
dwarf_line_op(s1, DW_LNS_advance_line);
dwarf_sleb128_op(s1, len_line);
}
}
}
dwarf_line.last_pc = ind;
dwarf_line.last_line = f->line_num;
}
else
{
if (func_ind != -1) {
put_stabn(s1, N_SLINE, 0, f->line_num, ind - func_ind);
} else {
/* from tcc_assemble */
put_stabs_r(s1, NULL, N_SLINE, 0, f->line_num, ind, text_section, section_sym);
}
}
}
static void tcc_debug_stabs (TCCState *s1, const char *str, int type, unsigned long value,
Section *sec, int sym_index, int info)
{
struct debug_sym *s;
if (debug_info) {
debug_info->sym =
(struct debug_sym *)tcc_realloc (debug_info->sym,
sizeof(struct debug_sym) *
(debug_info->n_sym + 1));
s = debug_info->sym + debug_info->n_sym++;
s->type = type;
s->value = value;
s->str = tcc_strdup(str);
s->sec = sec;
s->sym_index = sym_index;
s->info = info;
s->file = dwarf_line.cur_file;
s->line = file->line_num;
}
else if (sec)
put_stabs_r (s1, str, type, 0, 0, value, sec, sym_index);
else
put_stabs (s1, str, type, 0, 0, value);
}
ST_FUNC void tcc_debug_stabn(TCCState *s1, int type, int value)
{
if (!s1->do_debug)
return;
if (type == N_LBRAC) {
struct _debug_info *info =
(struct _debug_info *) tcc_mallocz(sizeof (*info));
info->start = value;
info->parent = debug_info;
if (debug_info) {
if (debug_info->child) {
if (debug_info->child->last)
debug_info->child->last->next = info;
else
debug_info->child->next = info;
debug_info->child->last = info;
}
else
debug_info->child = info;
}
else
debug_info_root = info;
debug_info = info;
}
else {
debug_info->end = value;
debug_info = debug_info->parent;
}
}
static int tcc_debug_find(TCCState *s1, Sym *t, int dwarf)
{
int i;
if (!debug_info && dwarf &&
(t->type.t & VT_BTYPE) == VT_STRUCT && t->c == -1) {
for (i = 0; i < n_debug_anon_hash; i++)
if (t == debug_anon_hash[i].type)
return 0;
debug_anon_hash = (struct _debug_anon_hash *)
tcc_realloc (debug_anon_hash,
(n_debug_anon_hash + 1) * sizeof(*debug_anon_hash));
debug_anon_hash[n_debug_anon_hash].n_debug_type = 0;
debug_anon_hash[n_debug_anon_hash].debug_type = NULL;
debug_anon_hash[n_debug_anon_hash++].type = t;
return 0;
}
for (i = 0; i < n_debug_hash; i++)
if (t == debug_hash[i].type)
return debug_hash[i].debug_type;
return -1;
}
static int tcc_get_dwarf_info(TCCState *s1, Sym *s);
static void tcc_debug_check_anon(TCCState *s1, Sym *t, int debug_type)
{
int i;
if (!debug_info && (t->type.t & VT_BTYPE) == VT_STRUCT && t->type.ref->c == -1)
for (i = 0; i < n_debug_anon_hash; i++)
if (t->type.ref == debug_anon_hash[i].type) {
debug_anon_hash[i].debug_type =
tcc_realloc(debug_anon_hash[i].debug_type,
(debug_anon_hash[i].n_debug_type + 1) * sizeof(int));
debug_anon_hash[i].debug_type[debug_anon_hash[i].n_debug_type++] =
debug_type;
}
}
ST_FUNC void tcc_debug_fix_anon(TCCState *s1, CType *t)
{
int i, j, debug_type;
if (!(s1->do_debug & 2) || !s1->dwarf || debug_info)
return;
if ((t->t & VT_BTYPE) == VT_STRUCT && t->ref->c != -1)
for (i = 0; i < n_debug_anon_hash; i++)
if (t->ref == debug_anon_hash[i].type) {
Sym sym = {0}; sym .type = *t ;
/* Trick to not hash this struct */
debug_info = (struct _debug_info *) t;
debug_type = tcc_get_dwarf_info(s1, &sym);
debug_info = NULL;
for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
write32le(dwarf_info_section->data +
debug_anon_hash[i].debug_type[j],
debug_type - dwarf_info.start);
tcc_free(debug_anon_hash[i].debug_type);
n_debug_anon_hash--;
for (; i < n_debug_anon_hash; i++)
debug_anon_hash[i] = debug_anon_hash[i + 1];
}
}
static int tcc_debug_add(TCCState *s1, Sym *t, int dwarf)
{
int offset = dwarf ? dwarf_info_section->data_offset : ++debug_next_type;
debug_hash = (struct _debug_hash *)
tcc_realloc (debug_hash,
(n_debug_hash + 1) * sizeof(*debug_hash));
debug_hash[n_debug_hash].debug_type = offset;
debug_hash[n_debug_hash++].type = t;
return offset;
}
static void tcc_debug_remove(TCCState *s1, Sym *t)
{
int i;
for (i = 0; i < n_debug_hash; i++)
if (t == debug_hash[i].type) {
n_debug_hash--;
for (; i < n_debug_hash; i++)
debug_hash[i] = debug_hash[i+1];
}
}
#define STRUCT_NODEBUG(s) \
(s->a.nodebug || \
((s->v & ~SYM_FIELD) >= SYM_FIRST_ANOM && \
((s->type.t & VT_BTYPE) == VT_BYTE || \
(s->type.t & VT_BTYPE) == VT_BOOL || \
(s->type.t & VT_BTYPE) == VT_SHORT || \
(s->type.t & VT_BTYPE) == VT_INT || \
(s->type.t & VT_BTYPE) == VT_LLONG)))
static void tcc_get_debug_info(TCCState *s1, Sym *s, CString *result)
{
int type;
int n = 0;
int debug_type = -1;
Sym *t = s;
CString str;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
n++, t = t->type.ref;
else
break;
}
if ((type & VT_BTYPE) == VT_STRUCT) {
Sym *e = t;
t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 0);
if (debug_type == -1) {
debug_type = tcc_debug_add(s1, t, 0);
cstr_new (&str);
cstr_printf (&str, "%s:T%d=%c%d",
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL),
debug_type,
IS_UNION (t->type.t) ? 'u' : 's',
t->c);
while (t->next) {
int pos, size, align;
t = t->next;
if (STRUCT_NODEBUG(t))
continue;
cstr_printf (&str, "%s:",
get_tok_str(t->v, NULL));
tcc_get_debug_info (s1, t, &str);
if (t->type.t & VT_BITFIELD) {
pos = t->c * 8 + BIT_POS(t->type.t);
size = BIT_SIZE(t->type.t);
}
else {
pos = t->c * 8;
size = type_size(&t->type, &align) * 8;
}
cstr_printf (&str, ",%d,%d;", pos, size);
}
cstr_printf (&str, ";");
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
cstr_free (&str);
if (debug_info)
tcc_debug_remove(s1, e);
}
}
else if (IS_ENUM(type)) {
Sym *e = t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 0);
if (debug_type == -1) {
debug_type = tcc_debug_add(s1, t, 0);
cstr_new (&str);
cstr_printf (&str, "%s:T%d=e",
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL),
debug_type);
while (t->next) {
t = t->next;
cstr_printf (&str, "%s:",
(t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
cstr_printf (&str, e->type.t & VT_UNSIGNED ? "%u," : "%d,",
(int)t->enum_val);
}
cstr_printf (&str, ";");
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
cstr_free (&str);
if (debug_info)
tcc_debug_remove(s1, e);
}
}
else if ((type & VT_BTYPE) != VT_FUNC) {
type &= ~VT_STRUCT_MASK;
for (debug_type = 1; debug_type <= N_DEFAULT_DEBUG; debug_type++)
if (default_debug[debug_type - 1].type == type)
break;
if (debug_type > N_DEFAULT_DEBUG)
return;
}
if (n > 0)
cstr_printf (result, "%d=", ++debug_next_type);
t = s;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR)
cstr_printf (result, "%d=*", ++debug_next_type);
else if (type == (VT_PTR | VT_ARRAY))
cstr_printf (result, "%d=ar1;0;%d;",
++debug_next_type, t->type.ref->c - 1);
else if (type == VT_FUNC) {
cstr_printf (result, "%d=f", ++debug_next_type);
tcc_get_debug_info (s1, t->type.ref, result);
return;
}
else
break;
t = t->type.ref;
}
cstr_printf (result, "%d", debug_type);
}
static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
{
int type;
int debug_type = -1;
Sym *e, *t = s;
int i;
int last_pos = -1;
int retval;
if (new_file)
put_new_file(s1);
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
t = t->type.ref;
else
break;
}
if ((type & VT_BTYPE) == VT_STRUCT) {
t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 1);
if (debug_type == -1) {
int pos_sib = 0, i, *pos_type;
debug_type = tcc_debug_add(s1, t, 1);
e = t;
i = 0;
while (e->next) {
e = e->next;
if (STRUCT_NODEBUG(e))
continue;
i++;
}
pos_type = (int *) tcc_malloc(i * sizeof(int));
dwarf_data1(dwarf_info_section,
IS_UNION (t->type.t)
? t->next ? DWARF_ABBREV_UNION_TYPE
: DWARF_ABBREV_UNION_EMPTY_TYPE
: t->next ? DWARF_ABBREV_STRUCTURE_TYPE
: DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
dwarf_strp(dwarf_info_section,
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
dwarf_uleb128(dwarf_info_section, t->c);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
if (t->next) {
pos_sib = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
}
e = t;
i = 0;
while (e->next) {
e = e->next;
if (STRUCT_NODEBUG(e))
continue;
dwarf_data1(dwarf_info_section,
e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
: DWARF_ABBREV_MEMBER);
dwarf_strp(dwarf_info_section,
get_tok_str(e->v, NULL));
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
pos_type[i++] = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
if (e->type.t & VT_BITFIELD) {
int pos = e->c * 8 + BIT_POS(e->type.t);
int size = BIT_SIZE(e->type.t);
dwarf_uleb128(dwarf_info_section, size);
dwarf_uleb128(dwarf_info_section, pos);
}
else
dwarf_uleb128(dwarf_info_section, e->c);
}
if (t->next) {
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + pos_sib,
dwarf_info_section->data_offset - dwarf_info.start);
}
e = t;
i = 0;
while (e->next) {
e = e->next;
if (STRUCT_NODEBUG(e))
continue;
type = tcc_get_dwarf_info(s1, e);
tcc_debug_check_anon(s1, e, pos_type[i]);
write32le(dwarf_info_section->data + pos_type[i++],
type - dwarf_info.start);
}
tcc_free(pos_type);
if (debug_info)
tcc_debug_remove(s1, t);
}
}
else if (IS_ENUM(type)) {
t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 1);
if (debug_type == -1) {
int pos_sib, pos_type;
Sym sym = {0}; sym.type.t = VT_INT | (type & VT_UNSIGNED);
pos_type = tcc_get_dwarf_info(s1, &sym);
debug_type = tcc_debug_add(s1, t, 1);
dwarf_data1(dwarf_info_section, DWARF_ABBREV_ENUMERATION_TYPE);
dwarf_strp(dwarf_info_section,
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
dwarf_data1(dwarf_info_section,
type & VT_UNSIGNED ? DW_ATE_unsigned : DW_ATE_signed );
dwarf_data1(dwarf_info_section, 4);
dwarf_data4(dwarf_info_section, pos_type - dwarf_info.start);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
pos_sib = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
e = t;
while (e->next) {
e = e->next;
dwarf_data1(dwarf_info_section,
type & VT_UNSIGNED ? DWARF_ABBREV_ENUMERATOR_UNSIGNED
: DWARF_ABBREV_ENUMERATOR_SIGNED);
dwarf_strp(dwarf_info_section,
(e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(e->v, NULL));
if (type & VT_UNSIGNED)
dwarf_uleb128(dwarf_info_section, e->enum_val);
else
dwarf_sleb128(dwarf_info_section, e->enum_val);
}
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + pos_sib,
dwarf_info_section->data_offset - dwarf_info.start);
if (debug_info)
tcc_debug_remove(s1, t);
}
}
else if ((type & VT_BTYPE) != VT_FUNC) {
type &= ~VT_STRUCT_MASK;
for (i = 1; i <= N_DEFAULT_DEBUG; i++)
if (default_debug[i - 1].type == type)
break;
if (i > N_DEFAULT_DEBUG)
return 0;
debug_type = dwarf_info.base_type_used[i - 1];
if (debug_type == 0) {
char name[100];
debug_type = dwarf_info_section->data_offset;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_BASE_TYPE);
dwarf_uleb128(dwarf_info_section, default_debug[i - 1].size);
dwarf_data1(dwarf_info_section, default_debug[i - 1].encoding);
strncpy(name, default_debug[i - 1].name, sizeof(name) -1);
*strchr(name, ':') = 0;
dwarf_strp(dwarf_info_section, name);
dwarf_info.base_type_used[i - 1] = debug_type;
}
}
retval = debug_type;
e = NULL;
t = s;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR) {
i = dwarf_info_section->data_offset;
if (retval == debug_type)
retval = i;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_POINTER);
dwarf_data1(dwarf_info_section, PTR_SIZE);
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
i - dwarf_info.start);
}
last_pos = dwarf_info_section->data_offset;
e = t->type.ref;
dwarf_data4(dwarf_info_section, 0);
}
else if (type == (VT_PTR | VT_ARRAY)) {
int sib_pos, sub_type;
#if LONG_SIZE == 4
Sym sym = {0}; sym.type.t = VT_LONG | VT_INT | VT_UNSIGNED;
#else
Sym sym = {0}; sym.type.t = VT_LLONG | VT_LONG | VT_UNSIGNED;
#endif
sub_type = tcc_get_dwarf_info(s1, &sym);
i = dwarf_info_section->data_offset;
if (retval == debug_type)
retval = i;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_ARRAY_TYPE);
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
i - dwarf_info.start);
}
last_pos = dwarf_info_section->data_offset;
e = t->type.ref;
dwarf_data4(dwarf_info_section, 0);
sib_pos = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
for (;;) {
dwarf_data1(dwarf_info_section, DWARF_ABBREV_SUBRANGE_TYPE);
dwarf_data4(dwarf_info_section, sub_type - dwarf_info.start);
dwarf_uleb128(dwarf_info_section, t->type.ref->c - 1);
s = t->type.ref;
type = s->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
if (type != (VT_PTR | VT_ARRAY))
break;
t = s;
}
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + sib_pos,
dwarf_info_section->data_offset - dwarf_info.start);
}
else if (type == VT_FUNC) {
int sib_pos = 0, *pos_type;
Sym *f;
i = dwarf_info_section->data_offset;
debug_type = tcc_get_dwarf_info(s1, t->type.ref);
if (retval == debug_type)
retval = i;
dwarf_data1(dwarf_info_section,
t->type.ref->next ? DWARF_ABBREV_SUBROUTINE_TYPE
: DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE);
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
i - dwarf_info.start);
}
last_pos = dwarf_info_section->data_offset;
e = t->type.ref;
dwarf_data4(dwarf_info_section, 0);
if (t->type.ref->next) {
sib_pos = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
}
f = t->type.ref;
i = 0;
while (f->next) {
f = f->next;
i++;
}
pos_type = (int *) tcc_malloc(i * sizeof(int));
f = t->type.ref;
i = 0;
while (f->next) {
f = f->next;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_FORMAL_PARAMETER2);
pos_type[i++] = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
}
if (t->type.ref->next) {
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + sib_pos,
dwarf_info_section->data_offset - dwarf_info.start);
}
f = t->type.ref;
i = 0;
while (f->next) {
f = f->next;
type = tcc_get_dwarf_info(s1, f);
tcc_debug_check_anon(s1, f, pos_type[i]);
write32le(dwarf_info_section->data + pos_type[i++],
type - dwarf_info.start);
}
tcc_free(pos_type);
}
else {
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
debug_type - dwarf_info.start);
}
break;
}
t = t->type.ref;
}
return retval;
}
static void tcc_debug_finish (TCCState *s1, struct _debug_info *cur)
{
while (cur) {
struct _debug_info *next = cur->next;
int i;
if (s1->dwarf) {
for (i = cur->n_sym - 1; i >= 0; i--) {
struct debug_sym *s = &cur->sym[i];
dwarf_data1(dwarf_info_section,
s->type == N_PSYM
? DWARF_ABBREV_FORMAL_PARAMETER
: s->type == N_GSYM
? DWARF_ABBREV_VARIABLE_EXTERNAL
: s->type == N_STSYM
? DWARF_ABBREV_VARIABLE_STATIC
: DWARF_ABBREV_VARIABLE_LOCAL);
dwarf_strp(dwarf_info_section, s->str);
if (s->type == N_GSYM || s->type == N_STSYM) {
dwarf_uleb128(dwarf_info_section, s->file);
dwarf_uleb128(dwarf_info_section, s->line);
}
dwarf_data4(dwarf_info_section, s->info - dwarf_info.start);
if (s->type == N_GSYM || s->type == N_STSYM) {
/* global/static */
if (s->type == N_GSYM)
dwarf_data1(dwarf_info_section, 1);
dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
dwarf_data1(dwarf_info_section, DW_OP_addr);
if (s->type == N_STSYM)
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, s->value);
#else
dwarf_data8(dwarf_info_section, s->value);
#endif
}
else {
/* param/local */
dwarf_data1(dwarf_info_section, dwarf_sleb128_size(s->value) + 1);
dwarf_data1(dwarf_info_section, DW_OP_fbreg);
dwarf_sleb128(dwarf_info_section, s->value);
}
tcc_free (s->str);
}
tcc_free (cur->sym);
dwarf_data1(dwarf_info_section,
cur->child ? DWARF_ABBREV_LEXICAL_BLOCK
: DWARF_ABBREV_LEXICAL_EMPTY_BLOCK);
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, func_ind + cur->start);
dwarf_data4(dwarf_info_section, cur->end - cur->start);
#else
dwarf_data8(dwarf_info_section, func_ind + cur->start);
dwarf_data8(dwarf_info_section, cur->end - cur->start);
#endif
tcc_debug_finish (s1, cur->child);
if (cur->child)
dwarf_data1(dwarf_info_section, 0);
}
else
{
for (i = 0; i < cur->n_sym; i++) {
struct debug_sym *s = &cur->sym[i];
if (s->sec)
put_stabs_r(s1, s->str, s->type, 0, 0, s->value,
s->sec, s->sym_index);
else
put_stabs(s1, s->str, s->type, 0, 0, s->value);
tcc_free (s->str);
}
tcc_free (cur->sym);
put_stabn(s1, N_LBRAC, 0, 0, cur->start);
tcc_debug_finish (s1, cur->child);
put_stabn(s1, N_RBRAC, 0, 0, cur->end);
}
tcc_free (cur);
cur = next;
}
}
ST_FUNC void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
{
CString debug_str;
if (!(s1->do_debug & 2))
return;
cstr_new (&debug_str);
for (; s != e; s = s->prev) {
if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
continue;
if (s1->dwarf) {
tcc_debug_stabs(s1, get_tok_str(s->v, NULL),
param ? N_PSYM : N_LSYM, s->c, NULL, 0,
tcc_get_dwarf_info(s1, s));
}
else
{
cstr_reset (&debug_str);
cstr_printf (&debug_str, "%s:%s", get_tok_str(s->v, NULL),
param ? "p" : "");
tcc_get_debug_info(s1, s, &debug_str);
tcc_debug_stabs(s1, debug_str.data, param ? N_PSYM : N_LSYM,
s->c, NULL, 0, 0);
}
}
cstr_free (&debug_str);
}
/* put function symbol */
ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
{
CString debug_str;
BufferedFile *f;
if (!s1->do_debug)
return;
debug_info_root = NULL;
debug_info = NULL;
tcc_debug_stabn(s1, N_LBRAC, ind - func_ind);
f = put_new_file(s1);
if (!f)
return;
if (s1->dwarf) {
tcc_debug_line(s1);
dwarf_info.func = sym;
dwarf_info.line = file->line_num;
if (s1->do_backtrace) {
int i, len;
dwarf_line_op(s1, 0); // extended
dwarf_uleb128_op(s1, strlen(funcname) + 2);
dwarf_line_op(s1, DW_LNE_hi_user - 1);
len = strlen(funcname) + 1;
for (i = 0; i < len; i++)
dwarf_line_op(s1, funcname[i]);
}
}
else
{
cstr_new (&debug_str);
cstr_printf(&debug_str, "%s:%c", funcname, sym->type.t & VT_STATIC ? 'f' : 'F');
tcc_get_debug_info(s1, sym->type.ref, &debug_str);
put_stabs_r(s1, debug_str.data, N_FUN, 0, f->line_num, 0, cur_text_section, sym->c);
cstr_free (&debug_str);
tcc_debug_line(s1);
}
}
ST_FUNC void tcc_debug_prolog_epilog(TCCState *s1, int value)
{
if (!s1->do_debug)
return;
if (s1->dwarf) {
dwarf_line_op(s1, value == 0 ? DW_LNS_set_prologue_end
: DW_LNS_set_epilogue_begin);
}
}
/* put function size */
ST_FUNC void tcc_debug_funcend(TCCState *s1, int size)
{
/* lldb does not like function end and next function start at same pc */
int min_instr_len;
tcc_debug_frame_end(s1, size);
if (!s1->do_debug)
return;
min_instr_len = dwarf_line.last_pc == ind ? 0 : DWARF_MIN_INSTR_LEN;
ind -= min_instr_len;
tcc_debug_line(s1);
ind += min_instr_len;
tcc_debug_stabn(s1, N_RBRAC, size);
if (s1->dwarf) {
int func_sib = 0;
Sym *sym = dwarf_info.func;
int n_debug_info = tcc_get_dwarf_info(s1, sym->type.ref);
dwarf_data1(dwarf_info_section,
sym->type.t & VT_STATIC ? DWARF_ABBREV_SUBPROGRAM_STATIC
: DWARF_ABBREV_SUBPROGRAM_EXTERNAL);
if ((sym->type.t & VT_STATIC) == 0)
dwarf_data1(dwarf_info_section, 1);
dwarf_strp(dwarf_info_section, funcname);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, dwarf_info.line);
tcc_debug_check_anon(s1, sym->type.ref, dwarf_info_section->data_offset);
dwarf_data4(dwarf_info_section, n_debug_info - dwarf_info.start);
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, func_ind); // low_pc
dwarf_data4(dwarf_info_section, size); // high_pc
#else
dwarf_data8(dwarf_info_section, func_ind); // low_pc
dwarf_data8(dwarf_info_section, size); // high_pc
#endif
func_sib = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0); // sibling
dwarf_data1(dwarf_info_section, 1);
#if defined(TCC_TARGET_I386)
dwarf_data1(dwarf_info_section, DW_OP_reg5); // ebp
#elif defined(TCC_TARGET_X86_64)
dwarf_data1(dwarf_info_section, DW_OP_reg6); // rbp
#elif defined TCC_TARGET_ARM
dwarf_data1(dwarf_info_section, DW_OP_reg13); // sp
#elif defined TCC_TARGET_ARM64
dwarf_data1(dwarf_info_section, DW_OP_reg29); // reg 29
#elif defined TCC_TARGET_RISCV64
dwarf_data1(dwarf_info_section, DW_OP_reg8); // r8(s0)
#else
dwarf_data1(dwarf_info_section, DW_OP_call_frame_cfa);
#endif
tcc_debug_finish (s1, debug_info_root);
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + func_sib,
dwarf_info_section->data_offset - dwarf_info.start);
}
else
{
tcc_debug_finish (s1, debug_info_root);
}
debug_info_root = 0;
}
ST_FUNC void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
{
if (!(s1->do_debug & 2))
return;
if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
return;
if (s1->dwarf) {
int debug_type;
debug_type = tcc_get_dwarf_info(s1, sym);
dwarf_data1(dwarf_info_section,
sym_bind == STB_GLOBAL
? DWARF_ABBREV_VARIABLE_EXTERNAL
: DWARF_ABBREV_VARIABLE_STATIC);
dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
if (sym_bind == STB_GLOBAL)
dwarf_data1(dwarf_info_section, 1);
dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
dwarf_data1(dwarf_info_section, DW_OP_addr);
greloca(dwarf_info_section, sym, dwarf_info_section->data_offset,
R_DATA_PTR, 0);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, 0);
#else
dwarf_data8(dwarf_info_section, 0);
#endif
}
else
{
Section *s = sh_num == SHN_COMMON ? common_section
: s1->sections[sh_num];
CString str;
cstr_new (&str);
cstr_printf (&str, "%s:%c",
get_tok_str(sym->v, NULL),
sym_bind == STB_GLOBAL ? 'G' : func_ind != -1 ? 'V' : 'S'
);
tcc_get_debug_info(s1, sym, &str);
if (sym_bind == STB_GLOBAL)
tcc_debug_stabs(s1, str.data, N_GSYM, 0, NULL, 0, 0);
else
tcc_debug_stabs(s1, str.data,
(sym->type.t & VT_STATIC) && data_section == s
? N_STSYM : N_LCSYM, 0, s, sym->c, 0);
cstr_free (&str);
}
}
ST_FUNC void tcc_debug_typedef(TCCState *s1, Sym *sym)
{
if (!(s1->do_debug & 2))
return;
if (s1->dwarf) {
int debug_type;
debug_type = tcc_get_dwarf_info(s1, sym);
if (debug_type != -1) {
dwarf_data1(dwarf_info_section, DWARF_ABBREV_TYPEDEF);
dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
}
}
else
{
CString str;
cstr_new (&str);
cstr_printf (&str, "%s:t",
(sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(sym->v, NULL));
tcc_get_debug_info(s1, sym, &str);
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
cstr_free (&str);
}
}
/* ------------------------------------------------------------------------- */
/* for section layout see lib/tcov.c */
ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line);
ST_FUNC void tcc_tcov_block_begin(TCCState *s1)
{
SValue sv;
void *ptr;
unsigned long last_offset = tcov_data.offset;
tcc_tcov_block_end (tcc_state, 0);
if (s1->test_coverage == 0 || nocode_wanted)
return;
if (tcov_data.last_file_name == 0 ||
strcmp ((const char *)(tcov_section->data + tcov_data.last_file_name),
file->true_filename) != 0) {
char wd[1024];
CString cstr;
if (tcov_data.last_func_name)
section_ptr_add(tcov_section, 1);
if (tcov_data.last_file_name)
section_ptr_add(tcov_section, 1);
tcov_data.last_func_name = 0;
cstr_new (&cstr);
if (file->true_filename[0] == '/') {
tcov_data.last_file_name = tcov_section->data_offset;
cstr_printf (&cstr, "%s", file->true_filename);
}
else {
getcwd (wd, sizeof(wd));
tcov_data.last_file_name = tcov_section->data_offset + strlen(wd) + 1;
cstr_printf (&cstr, "%s/%s", wd, file->true_filename);
}
ptr = section_ptr_add(tcov_section, cstr.size + 1);
strcpy((char *)ptr, cstr.data);
#ifdef _WIN32
normalize_slashes((char *)ptr);
#endif
cstr_free (&cstr);
}
if (tcov_data.last_func_name == 0 ||
strcmp ((const char *)(tcov_section->data + tcov_data.last_func_name),
funcname) != 0) {
size_t len;
if (tcov_data.last_func_name)
section_ptr_add(tcov_section, 1);
tcov_data.last_func_name = tcov_section->data_offset;
len = strlen (funcname);
ptr = section_ptr_add(tcov_section, len + 1);
strcpy((char *)ptr, funcname);
section_ptr_add(tcov_section, -tcov_section->data_offset & 7);
ptr = section_ptr_add(tcov_section, 8);
write64le (ptr, file->line_num);
}
if (ind == tcov_data.ind && tcov_data.line == file->line_num)
tcov_data.offset = last_offset;
else {
Sym label = {0};
label.type.t = VT_LLONG | VT_STATIC;
ptr = section_ptr_add(tcov_section, 16);
tcov_data.line = file->line_num;
write64le (ptr, (tcov_data.line << 8) | 0xff);
put_extern_sym(&label, tcov_section,
((unsigned char *)ptr - tcov_section->data) + 8, 0);
sv.type = label.type;
sv.r = VT_SYM | VT_LVAL | VT_CONST;
sv.r2 = VT_CONST;
sv.c.i = 0;
sv.sym = &label;
#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 || \
defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64 || \
defined TCC_TARGET_RISCV64
gen_increment_tcov (&sv);
#else
vpushv(&sv);
inc(0, TOK_INC);
vpop();
#endif
tcov_data.offset = (unsigned char *)ptr - tcov_section->data;
tcov_data.ind = ind;
}
}
ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line)
{
if (s1->test_coverage == 0)
return;
if (line == -1)
line = tcov_data.line;
if (tcov_data.offset) {
void *ptr = tcov_section->data + tcov_data.offset;
unsigned long long nline = line ? line : file->line_num;
write64le (ptr, (read64le (ptr) & 0xfffffffffull) | (nline << 36));
tcov_data.offset = 0;
}
}
ST_FUNC void tcc_tcov_check_line(TCCState *s1, int start)
{
if (s1->test_coverage == 0)
return;
if (tcov_data.line != file->line_num) {
if ((tcov_data.line + 1) != file->line_num) {
tcc_tcov_block_end (s1, -1);
if (start)
tcc_tcov_block_begin (s1);
}
else
tcov_data.line = file->line_num;
}
}
ST_FUNC void tcc_tcov_start(TCCState *s1)
{
if (s1->test_coverage == 0)
return;
if (!s1->dState)
s1->dState = tcc_mallocz(sizeof *s1->dState);
memset (&tcov_data, 0, sizeof (tcov_data));
if (tcov_section == NULL) {
tcov_section = new_section(tcc_state, ".tcov", SHT_PROGBITS,
SHF_ALLOC | SHF_WRITE);
section_ptr_add(tcov_section, 4); // pointer to executable name
}
}
ST_FUNC void tcc_tcov_end(TCCState *s1)
{
if (s1->test_coverage == 0)
return;
if (tcov_data.last_func_name)
section_ptr_add(tcov_section, 1);
if (tcov_data.last_file_name)
section_ptr_add(tcov_section, 1);
}
ST_FUNC void tcc_tcov_reset_ind(TCCState *s1)
{
tcov_data.ind = 0;
}
/* ------------------------------------------------------------------------- */
#undef last_line_num
#undef new_file
#undef section_sym
#undef debug_next_type
#undef debug_hash
#undef n_debug_hash
#undef debug_anon_hash
#undef n_debug_anon_hash
#undef debug_info
#undef debug_info_root
#undef dwarf_sym
#undef dwarf_line
#undef dwarf_info
#undef tcov_data
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