| /* dwarf2dbg.c - DWARF2 debug support |
| Copyright (C) 1999, 2000 Free Software Foundation, Inc. |
| Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
| |
| This file is part of GAS, the GNU Assembler. |
| |
| GAS is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GAS 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GAS; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| /* Logical line numbers can be controlled by the compiler via the |
| following two directives: |
| |
| .file FILENO "file.c" |
| .loc FILENO LINENO [COLUMN] |
| |
| FILENO is the filenumber. */ |
| |
| #include "ansidecl.h" |
| |
| #include "as.h" |
| #include "dwarf2dbg.h" |
| #include "subsegs.h" |
| |
| #include "elf/dwarf2.h" |
| |
| /* Since we can't generate the prolog until the body is complete, we |
| use three different subsegments for .debug_line: one holding the |
| prolog, one for the directory and filename info, and one for the |
| body ("statement program"). */ |
| #define DL_PROLOG 0 |
| #define DL_FILES 1 |
| #define DL_BODY 2 |
| |
| /* First special line opcde - leave room for the standard opcodes. |
| Note: If you want to change this, you'll have to update the |
| "standard_opcode_lengths" table that is emitted below in |
| dwarf2_finish(). */ |
| #define DWARF2_LINE_OPCODE_BASE 10 |
| |
| #ifndef DWARF2_LINE_BASE |
| /* Minimum line offset in a special line info. opcode. This value |
| was chosen to give a reasonable range of values. */ |
| # define DWARF2_LINE_BASE -5 |
| #endif |
| |
| /* Range of line offsets in a special line info. opcode. */ |
| #ifndef DWARF2_LINE_RANGE |
| # define DWARF2_LINE_RANGE 14 |
| #endif |
| |
| #ifndef DWARF2_LINE_MIN_INSN_LENGTH |
| /* Define the architecture-dependent minimum instruction length (in |
| bytes). This value should be rather too small than too big. */ |
| # define DWARF2_LINE_MIN_INSN_LENGTH 4 |
| #endif |
| |
| /* Flag that indicates the initial value of the is_stmt_start flag. |
| In the present implementation, we do not mark any lines as |
| the beginning of a source statement, because that information |
| is not made available by the GCC front-end. */ |
| #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
| |
| /* Flag that indicates the initial value of the is_stmt_start flag. |
| In the present implementation, we do not mark any lines as |
| the beginning of a source statement, because that information |
| is not made available by the GCC front-end. */ |
| #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
| |
| /* Given a special op, return the line skip amount. */ |
| #define SPECIAL_LINE(op) \ |
| (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) |
| |
| /* Given a special op, return the address skip amount (in units of |
| DWARF2_LINE_MIN_INSN_LENGTH. */ |
| #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) |
| |
| /* The maximum address skip amount that can be encoded with a special op. */ |
| #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
| |
| #define INITIAL_STATE \ |
| /* Initialize as per DWARF2.0 standard. */ \ |
| 0, /* address */ \ |
| 1, /* file */ \ |
| 1, /* line */ \ |
| 0, /* column */ \ |
| DWARF2_LINE_DEFAULT_IS_STMT, /* is_stmt */ \ |
| 0, /* basic_block */ \ |
| 1 /* empty_sequence */ |
| |
| static struct |
| { |
| /* state machine state as per DWARF2 manual: */ |
| struct dwarf2_sm |
| { |
| addressT addr; |
| unsigned int filenum; |
| unsigned int line; |
| unsigned int column; |
| unsigned int |
| is_stmt : 1, |
| basic_block : 1, |
| empty_sequence : 1; /* current code sequence has no DWARF2 directives? */ |
| } |
| sm; |
| |
| unsigned int |
| any_dwarf2_directives : 1; /* did we emit any DWARF2 line debug directives? */ |
| |
| fragS * frag; /* frag that "addr" is relative to */ |
| segT text_seg; /* text segment "addr" is relative to */ |
| subsegT text_subseg; |
| segT line_seg; /* ".debug_line" segment */ |
| int last_filename; /* index of last filename that was used */ |
| int num_filenames; /* index of last filename in use */ |
| int filename_len; /* length of the filename array */ |
| struct |
| { |
| int dir; /* valid after gen_dir_list() only */ |
| char *name; /* full path before gen_dir_list(), filename afterwards */ |
| } |
| *file; |
| |
| struct dwarf2_line_info current; /* current source info: */ |
| |
| /* counters for statistical purposes: */ |
| unsigned int num_line_entries; |
| unsigned int opcode_hist[256]; /* histogram of opcode frequencies */ |
| } |
| ls = |
| { |
| { |
| INITIAL_STATE |
| }, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| NULL, |
| { NULL, 0, 0, 0, 0 }, |
| 0, |
| { |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
| } |
| }; |
| |
| |
| /* Function prototypes: */ |
| static void out_uleb128 PARAMS ((addressT)); |
| static void out_sleb128 PARAMS ((offsetT)); |
| static void gen_addr_line PARAMS ((int, addressT)); |
| static void reset_state_machine PARAMS ((void)); |
| static void out_set_addr PARAMS ((addressT)); |
| static void out_end_sequence PARAMS ((void)); |
| static int get_filenum PARAMS ((int, char *)); |
| static void gen_dir_list PARAMS ((void)); |
| static void gen_file_list PARAMS ((void)); |
| static void print_stats PARAMS ((unsigned long)); |
| |
| |
| #define out_byte(byte) FRAG_APPEND_1_CHAR(byte) |
| #define out_opcode(opc) (out_byte ((opc)), ++ls.opcode_hist[(opc) & 0xff]) |
| |
| /* Output an unsigned "little-endian base 128" number. */ |
| static void |
| out_uleb128 (value) |
| addressT value; |
| { |
| unsigned char byte, more = 0x80; |
| |
| do |
| { |
| byte = value & 0x7f; |
| value >>= 7; |
| if (value == 0) |
| more = 0; |
| out_byte (more | byte); |
| } |
| while (more); |
| } |
| |
| /* Output a signed "little-endian base 128" number. */ |
| static void |
| out_sleb128 (value) |
| offsetT value; |
| { |
| unsigned char byte, more = 0x80; |
| |
| do |
| { |
| byte = value & 0x7f; |
| value >>= 7; |
| if (((value == 0) && ((byte & 0x40) == 0)) |
| || ((value == -1) && ((byte & 0x40) != 0))) |
| more = 0; |
| out_byte (more | byte); |
| } |
| while (more); |
| } |
| |
| /* Encode a pair of line and address skips as efficiently as possible. |
| Note that the line skip is signed, whereas the address skip is |
| unsigned. */ |
| static void |
| gen_addr_line (line_delta, addr_delta) |
| int line_delta; |
| addressT addr_delta; |
| { |
| unsigned int tmp, opcode; |
| |
| tmp = line_delta - DWARF2_LINE_BASE; |
| |
| if (tmp >= DWARF2_LINE_RANGE) |
| { |
| out_opcode (DW_LNS_advance_line); |
| out_sleb128 (line_delta); |
| tmp = 0 - DWARF2_LINE_BASE; |
| line_delta = 0; |
| } |
| |
| tmp += DWARF2_LINE_OPCODE_BASE; |
| |
| /* try using a special opcode: */ |
| opcode = tmp + addr_delta*DWARF2_LINE_RANGE; |
| if (opcode <= 255) |
| { |
| out_opcode (opcode); |
| return; |
| } |
| |
| /* try using DW_LNS_const_add_pc followed by special op: */ |
| opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA)*DWARF2_LINE_RANGE; |
| if (opcode <= 255) |
| { |
| out_opcode (DW_LNS_const_add_pc); |
| out_opcode (opcode); |
| return; |
| } |
| |
| out_opcode (DW_LNS_advance_pc); |
| out_uleb128 (addr_delta); |
| |
| if (line_delta) |
| out_opcode (tmp); /* output line-delta */ |
| else |
| out_opcode (DW_LNS_copy); /* append new row with current info */ |
| } |
| |
| static void |
| reset_state_machine () |
| { |
| static const struct dwarf2_sm initial_state = { INITIAL_STATE }; |
| |
| ls.sm = initial_state; |
| } |
| |
| /* Set an absolute address (may results in a relocation entry): */ |
| static void |
| out_set_addr (addr) |
| addressT addr; |
| { |
| subsegT saved_subseg; |
| segT saved_seg; |
| expressionS expr; |
| symbolS *sym; |
| int bytes_per_address; |
| |
| saved_seg = now_seg; |
| saved_subseg = now_subseg; |
| |
| subseg_set (ls.text_seg, ls.text_subseg); |
| sym = symbol_new (".L0\001", now_seg, addr, frag_now); |
| |
| subseg_set (saved_seg, saved_subseg); |
| |
| #ifdef BFD_ASSEMBLER |
| bytes_per_address = bfd_arch_bits_per_address (stdoutput) / 8; |
| #else |
| /* FIXME. */ |
| bytes_per_address = 4; |
| #endif |
| |
| out_opcode (DW_LNS_extended_op); |
| out_uleb128 (bytes_per_address + 1); |
| |
| out_opcode (DW_LNE_set_address); |
| expr.X_op = O_symbol; |
| expr.X_add_symbol = sym; |
| expr.X_add_number = 0; |
| emit_expr (&expr, bytes_per_address); |
| } |
| |
| /* Emit DW_LNS_end_sequence and reset state machine. Does not |
| preserve the current segment/sub-segment! */ |
| static void |
| out_end_sequence () |
| { |
| addressT addr, delta; |
| fragS *text_frag; |
| |
| if (ls.text_seg) |
| { |
| subseg_set (ls.text_seg, ls.text_subseg); |
| #ifdef md_current_text_addr |
| addr = md_current_text_addr (); |
| #else |
| addr = frag_now_fix (); |
| #endif |
| text_frag = frag_now; |
| subseg_set (ls.line_seg, DL_BODY); |
| if (text_frag != ls.frag) |
| { |
| out_set_addr (addr); |
| ls.sm.addr = addr; |
| ls.frag = text_frag; |
| } |
| else |
| { |
| delta = (addr - ls.sm.addr) / DWARF2_LINE_MIN_INSN_LENGTH; |
| if (delta > 0) |
| { |
| /* Advance address without updating the line-debug |
| matrix---the end_sequence entry is used only to tell |
| the debugger the end of the sequence.*/ |
| out_opcode (DW_LNS_advance_pc); |
| out_uleb128 (delta); |
| } |
| } |
| } |
| else |
| subseg_set (ls.line_seg, DL_BODY); |
| |
| out_opcode (DW_LNS_extended_op); |
| out_uleb128 (1); |
| out_byte (DW_LNE_end_sequence); |
| |
| reset_state_machine (); |
| } |
| |
| /* Look up a filenumber either by filename or by filenumber. If both |
| a filenumber and a filename are specified, lookup by filename takes |
| precedence. If the filename cannot be found, it is added to the |
| filetable and the filenumber for the new entry is returned. */ |
| static int |
| get_filenum (filenum, file) |
| int filenum; |
| char *file; |
| { |
| int i, last = filenum - 1; |
| char char0 = file[0]; |
| |
| /* If filenum is out of range of the filename table, then try using the |
| table entry returned from the previous call. */ |
| if (last >= ls.num_filenames || last < 0) |
| last = ls.last_filename; |
| |
| /* Do a quick check against the specified or previously used filenum. */ |
| if (ls.num_filenames > 0 && ls.file[last].name[0] == char0 |
| && strcmp (ls.file[last].name + 1, file + 1) == 0) |
| return last + 1; |
| |
| /* no match, fall back to simple linear scan: */ |
| for (i = 0; i < ls.num_filenames; ++i) |
| { |
| if (ls.file[i].name[0] == char0 |
| && strcmp (ls.file[i].name + 1, file + 1) == 0) |
| { |
| ls.last_filename = i; |
| return i + 1; |
| } |
| } |
| |
| /* no match: enter new filename */ |
| if (ls.num_filenames >= ls.filename_len) |
| { |
| ls.filename_len += 13; |
| ls.file = xrealloc (ls.file, ls.filename_len * sizeof (ls.file[0])); |
| } |
| ls.file[ls.num_filenames].dir = 0; |
| ls.file[ls.num_filenames].name = file; |
| ls.last_filename = ls.num_filenames; |
| return ++ls.num_filenames; |
| } |
| |
| /* Emit an entry in the line number table if the address or line has changed. |
| ADDR is relative to the current frag in the text section. */ |
| |
| void |
| dwarf2_gen_line_info (addr, l) |
| addressT addr; |
| struct dwarf2_line_info *l; |
| { |
| unsigned int filenum = l->filenum; |
| unsigned int any_output = 0; |
| subsegT saved_subseg; |
| segT saved_seg; |
| fragS *saved_frag; |
| |
| if (flag_debug) |
| fprintf (stderr, "line: addr %lx file `%s' line %u col %u flags %x\n", |
| (unsigned long) addr, l->filename, l->line, l->column, l->flags); |
| |
| if (filenum > 0 && !l->filename) |
| { |
| if (filenum >= (unsigned int) ls.num_filenames) |
| { |
| as_warn ("Encountered bad file number in line number debug info!"); |
| return; |
| } |
| } |
| else if (l->filename) |
| filenum = get_filenum (filenum, l->filename); |
| else |
| return; /* no filename, no filnum => no play */ |
| |
| /* Must save these before the subseg_new call, as that call will change |
| them. */ |
| saved_seg = now_seg; |
| saved_subseg = now_subseg; |
| saved_frag = frag_now; |
| |
| if (!ls.line_seg) |
| { |
| #ifdef BFD_ASSEMBLER |
| symbolS *secsym; |
| #endif |
| |
| ls.line_seg = subseg_new (".debug_line", 0); |
| |
| #ifdef BFD_ASSEMBLER |
| bfd_set_section_flags (stdoutput, ls.line_seg, SEC_READONLY); |
| |
| /* We're going to need this symbol. */ |
| secsym = symbol_find (".debug_line"); |
| if (secsym != NULL) |
| symbol_set_bfdsym (secsym, ls.line_seg->symbol); |
| else |
| symbol_table_insert (section_symbol (ls.line_seg)); |
| #endif |
| } |
| |
| subseg_set (ls.line_seg, DL_BODY); |
| |
| if (ls.text_seg != saved_seg || ls.text_subseg != saved_subseg) |
| { |
| if (!ls.sm.empty_sequence) |
| { |
| out_end_sequence (); /* terminate previous sequence */ |
| ls.sm.empty_sequence = 1; |
| } |
| any_output = 1; |
| ls.text_seg = saved_seg; |
| ls.text_subseg = saved_subseg; |
| out_set_addr (addr); |
| ls.sm.addr = addr; |
| ls.frag = saved_frag; |
| } |
| |
| if (ls.sm.filenum != filenum) |
| { |
| any_output = 1; |
| out_opcode (DW_LNS_set_file); |
| out_uleb128 (filenum); |
| ls.sm.filenum = filenum; |
| } |
| |
| if (ls.sm.column != l->column) |
| { |
| any_output = 1; |
| out_opcode (DW_LNS_set_column); |
| out_uleb128 (l->column); |
| ls.sm.column = l->column; |
| } |
| |
| if (((l->flags & DWARF2_FLAG_BEGIN_STMT) != 0) != ls.sm.is_stmt) |
| { |
| any_output = 1; |
| out_opcode (DW_LNS_negate_stmt); |
| } |
| |
| if (l->flags & DWARF2_FLAG_BEGIN_BLOCK) |
| { |
| any_output = 1; |
| out_opcode (DW_LNS_set_basic_block); |
| } |
| |
| if (ls.sm.line != l->line) |
| { |
| any_output = 1; |
| if (saved_frag != ls.frag) |
| { |
| /* If a new frag got allocated (for whatever reason), then |
| deal with it by generating a reference symbol. Note: no |
| end_sequence needs to be generated because the address did |
| not really decrease (only the reference point changed). */ |
| out_set_addr (addr); |
| ls.sm.addr = addr; |
| ls.frag = saved_frag; |
| } |
| gen_addr_line (l->line - ls.sm.line, |
| (addr - ls.sm.addr) / DWARF2_LINE_MIN_INSN_LENGTH); |
| ls.sm.basic_block = 0; |
| ls.sm.line = l->line; |
| ls.sm.addr = addr; |
| } |
| |
| subseg_set (saved_seg, saved_subseg); |
| |
| ls.num_line_entries += any_output; |
| if (any_output) |
| ls.sm.empty_sequence = 0; |
| } |
| |
| static void |
| gen_dir_list () |
| { |
| char *str, *slash, *dir_list, *dp, *cp; |
| int i, j, num_dirs; |
| |
| dir_list = frag_more (0); |
| num_dirs = 0; |
| |
| for (i = 0; i < ls.num_filenames; ++i) |
| { |
| str = ls.file[i].name; |
| slash = strrchr (str, '/'); |
| if (slash) |
| { |
| *slash = '\0'; |
| for (j = 0, dp = dir_list; j < num_dirs; ++j) |
| { |
| if (strcmp (str, dp) == 0) |
| { |
| ls.file[i].dir = j + 1; |
| break; |
| } |
| dp += strlen (dp); |
| } |
| if (j >= num_dirs) |
| { |
| /* didn't find this directory: append it to the list */ |
| size_t size = strlen (str) + 1; |
| cp = frag_more (size); |
| memcpy (cp, str, size); |
| ls.file[i].dir = ++num_dirs; |
| } |
| *slash = '/'; |
| ls.file[i].name = slash + 1; |
| } |
| } |
| out_byte ('\0'); /* terminate directory list */ |
| } |
| |
| static void |
| gen_file_list () |
| { |
| size_t size; |
| char *cp; |
| int i; |
| |
| for (i = 0; i < ls.num_filenames; ++i) |
| { |
| size = strlen (ls.file[i].name) + 1; |
| cp = frag_more (size); |
| memcpy (cp, ls.file[i].name, size); |
| |
| out_uleb128 (ls.file[i].dir); /* directory number */ |
| out_uleb128 (0); /* last modification timestamp */ |
| out_uleb128 (0); /* filesize */ |
| } |
| out_byte (0); /* terminate filename list */ |
| } |
| |
| static void |
| print_stats (total_size) |
| unsigned long total_size; |
| { |
| static const char *opc_name[] = |
| { |
| "extended", "copy", "advance_pc", "advance_line", "set_file", |
| "set_column", "negate_stmt", "set_basic_block", "const_add_pc", |
| "fixed_advance_pc" |
| }; |
| size_t i; |
| int j; |
| |
| fprintf (stderr, "Average size: %g bytes/line\n", |
| total_size / (double) ls.num_line_entries); |
| |
| fprintf (stderr, "\nStandard opcode histogram:\n"); |
| |
| for (i = 0; i < sizeof (opc_name)/sizeof (opc_name[0]); ++i) |
| { |
| fprintf (stderr, "%s", opc_name[i]); |
| for (j = strlen (opc_name[i]); j < 16; ++j) |
| fprintf (stderr, " "); |
| fprintf (stderr, ": %u\n", ls.opcode_hist[i]); |
| } |
| |
| fprintf (stderr, "\nSpecial opcodes:\naddr\t\t\t\tline skip\n"); |
| |
| fprintf (stderr, "skip: "); |
| for (j = DWARF2_LINE_BASE; j < DWARF2_LINE_BASE + DWARF2_LINE_RANGE; ++j) |
| fprintf (stderr, "%3d", j); |
| fprintf (stderr, "\n-----"); |
| |
| for (; i < 256; ++i) |
| { |
| j = SPECIAL_LINE (i); |
| if (j == DWARF2_LINE_BASE) |
| fprintf (stderr, "\n%4u: ", |
| ((unsigned int) |
| DWARF2_LINE_MIN_INSN_LENGTH * SPECIAL_ADDR (i))); |
| fprintf (stderr, " %2u", ls.opcode_hist[i]); |
| } |
| fprintf (stderr, "\n"); |
| } |
| |
| void |
| dwarf2_finish () |
| { |
| addressT body_size, total_size, prolog_size; |
| subsegT saved_subseg; |
| segT saved_seg; |
| char *cp; |
| |
| if (!ls.line_seg) |
| /* no .debug_line segment, no work to do... */ |
| return; |
| |
| saved_seg = now_seg; |
| saved_subseg = now_subseg; |
| |
| if (!ls.sm.empty_sequence) |
| out_end_sequence (); |
| total_size = body_size = frag_now_fix (); |
| |
| /* now generate the directory and file lists: */ |
| subseg_set (ls.line_seg, DL_FILES); |
| gen_dir_list (); |
| gen_file_list (); |
| total_size += frag_now_fix (); |
| |
| /* and now the header ("statement program prolog", in DWARF2 lingo...) */ |
| subseg_set (ls.line_seg, DL_PROLOG); |
| |
| cp = frag_more (15 + DWARF2_LINE_OPCODE_BASE - 1); |
| |
| total_size += frag_now_fix (); |
| prolog_size = total_size - body_size - 10; |
| |
| # define STUFF(val,size) md_number_to_chars (cp, val, size); cp += size; |
| STUFF (total_size - 4, 4); /* length */ |
| STUFF (2, 2); /* version */ |
| STUFF (prolog_size, 4); /* prologue_length */ |
| STUFF (DWARF2_LINE_MIN_INSN_LENGTH, 1); |
| STUFF (DWARF2_LINE_DEFAULT_IS_STMT, 1); |
| STUFF (DWARF2_LINE_BASE, 1); |
| STUFF (DWARF2_LINE_RANGE, 1); |
| STUFF (DWARF2_LINE_OPCODE_BASE, 1); |
| |
| /* standard_opcode_lengths: */ |
| STUFF (0, 1); /* DW_LNS_copy */ |
| STUFF (1, 1); /* DW_LNS_advance_pc */ |
| STUFF (1, 1); /* DW_LNS_advance_line */ |
| STUFF (1, 1); /* DW_LNS_set_file */ |
| STUFF (1, 1); /* DW_LNS_set_column */ |
| STUFF (0, 1); /* DW_LNS_negate_stmt */ |
| STUFF (0, 1); /* DW_LNS_set_basic_block */ |
| STUFF (0, 1); /* DW_LNS_const_add_pc */ |
| STUFF (1, 1); /* DW_LNS_fixed_advance_pc */ |
| |
| subseg_set (saved_seg, saved_subseg); |
| |
| if (flag_debug) |
| print_stats (total_size); |
| } |
| |
| void |
| dwarf2_directive_file (dummy) |
| int dummy ATTRIBUTE_UNUSED; |
| { |
| int len; |
| |
| /* Continue to accept a bare string and pass it off. */ |
| SKIP_WHITESPACE (); |
| if (*input_line_pointer == '"') |
| { |
| s_app_file (0); |
| return; |
| } |
| |
| ls.any_dwarf2_directives = 1; |
| |
| if (debug_type == DEBUG_NONE) |
| /* Automatically turn on DWARF2 debug info unless something else |
| has been selected. */ |
| debug_type = DEBUG_DWARF2; |
| |
| ls.current.filenum = get_absolute_expression (); |
| ls.current.filename = demand_copy_C_string (&len); |
| |
| demand_empty_rest_of_line (); |
| } |
| |
| void |
| dwarf2_directive_loc (dummy) |
| int dummy ATTRIBUTE_UNUSED; |
| { |
| ls.any_dwarf2_directives = 1; |
| |
| ls.current.filenum = get_absolute_expression (); |
| SKIP_WHITESPACE (); |
| ls.current.line = get_absolute_expression (); |
| SKIP_WHITESPACE (); |
| ls.current.column = get_absolute_expression (); |
| demand_empty_rest_of_line (); |
| |
| ls.current.flags = DWARF2_FLAG_BEGIN_STMT; |
| |
| #ifndef NO_LISTING |
| if (listing) |
| listing_source_line (ls.current.line); |
| #endif |
| } |
| |
| void |
| dwarf2_where (line) |
| struct dwarf2_line_info *line; |
| { |
| if (ls.any_dwarf2_directives) |
| *line = ls.current; |
| else |
| { |
| as_where (&line->filename, &line->line); |
| line->filenum = 0; |
| line->column = 0; |
| line->flags = DWARF2_FLAG_BEGIN_STMT; |
| } |
| } |