X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gas%2Fdwarf2dbg.c;h=85c1f30e89898c8d70f9752523c15825058abed4;hb=704897fbeff6f2247f87578efb9054e246fd0cd0;hp=b1c96b5f30d7f2cf49603787a5d74178c54b3f08;hpb=413a266c4f0c55f4946c249ee3c91f6c0cea9e08;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c index b1c96b5f30..85c1f30e89 100644 --- a/gas/dwarf2dbg.c +++ b/gas/dwarf2dbg.c @@ -1,5 +1,5 @@ /* dwarf2dbg.c - DWARF2 debug support - Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 + Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. Contributed by David Mosberger-Tang @@ -25,7 +25,8 @@ .file FILENO "file.c" .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ - [epilogue_begin] [is_stmt VALUE] [isa VALUE] + [epilogue_begin] [is_stmt VALUE] [isa VALUE] \ + [discriminator VALUE] */ #include "as.h" @@ -76,9 +77,21 @@ # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) #endif +#ifndef DWARF2_FILE_NAME +#define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME +#endif + +#ifndef DWARF2_FILE_TIME_NAME +#define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) 0 +#endif + +#ifndef DWARF2_FILE_SIZE_NAME +#define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) 0 +#endif + #include "subsegs.h" -#include "elf/dwarf2.h" +#include "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 @@ -155,6 +168,10 @@ struct line_seg { /* Collects data for all line table entries during assembly. */ static struct line_seg *all_segs; +/* Hash used to quickly lookup a segment by name, avoiding the need to search + through the all_segs list. */ +static struct hash_control *all_segs_hash; +static struct line_seg **last_seg_ptr; struct file_entry { const char *filename; @@ -182,7 +199,8 @@ bfd_boolean dwarf2_loc_mark_labels; /* Current location as indicated by the most recent .loc directive. */ static struct dwarf2_line_info current = { 1, 1, 0, 0, - DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0 + DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, + 0 }; /* The size of an address on the target. */ @@ -198,12 +216,12 @@ static unsigned int get_filenum (const char *, unsigned int); static void generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) { - expressionS expr; + expressionS exp; - expr.X_op = O_symbol; - expr.X_add_symbol = symbol; - expr.X_add_number = 0; - emit_expr (&expr, size); + exp.X_op = O_symbol; + exp.X_add_symbol = symbol; + exp.X_add_number = 0; + emit_expr (&exp, size); } #endif @@ -216,44 +234,46 @@ get_line_subseg (segT seg, subsegT subseg) static subsegT last_subseg; static struct line_subseg *last_line_subseg; - struct line_seg **ps, *s; - struct line_subseg **pss, *ss; + struct line_seg *s; + struct line_subseg **pss, *lss; if (seg == last_seg && subseg == last_subseg) return last_line_subseg; - for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next) - if (s->seg == seg) - goto found_seg; - - s = (struct line_seg *) xmalloc (sizeof (*s)); - s->next = NULL; - s->seg = seg; - s->head = NULL; - *ps = s; + s = (struct line_seg *) hash_find (all_segs_hash, seg->name); + if (s == NULL) + { + s = (struct line_seg *) xmalloc (sizeof (*s)); + s->next = NULL; + s->seg = seg; + s->head = NULL; + *last_seg_ptr = s; + last_seg_ptr = &s->next; + hash_insert (all_segs_hash, seg->name, s); + } + gas_assert (seg == s->seg); - found_seg: - for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) + for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) { - if (ss->subseg == subseg) + if (lss->subseg == subseg) goto found_subseg; - if (ss->subseg > subseg) + if (lss->subseg > subseg) break; } - ss = (struct line_subseg *) xmalloc (sizeof (*ss)); - ss->next = *pss; - ss->subseg = subseg; - ss->head = NULL; - ss->ptail = &ss->head; - *pss = ss; + lss = (struct line_subseg *) xmalloc (sizeof (*lss)); + lss->next = *pss; + lss->subseg = subseg; + lss->head = NULL; + lss->ptail = &lss->head; + *pss = lss; found_subseg: last_seg = seg; last_subseg = subseg; - last_line_subseg = ss; + last_line_subseg = lss; - return ss; + return lss; } /* Record an entry for LOC occurring at LABEL. */ @@ -261,7 +281,7 @@ get_line_subseg (segT seg, subsegT subseg) static void dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) { - struct line_subseg *ss; + struct line_subseg *lss; struct line_entry *e; e = (struct line_entry *) xmalloc (sizeof (*e)); @@ -269,9 +289,9 @@ dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) e->label = label; e->loc = *loc; - ss = get_line_subseg (now_seg, now_subseg); - *ss->ptail = e; - ss->ptail = &e->next; + lss = get_line_subseg (now_seg, now_subseg); + *lss->ptail = e; + lss->ptail = &e->next; } /* Record an entry for LOC occurring at OFS within the current fragment. */ @@ -319,6 +339,7 @@ dwarf2_where (struct dwarf2_line_info *line) line->column = 0; line->flags = DWARF2_FLAG_IS_STMT; line->isa = current.isa; + line->discriminator = current.discriminator; } else *line = current; @@ -367,6 +388,7 @@ dwarf2_consume_line_info (void) current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | DWARF2_FLAG_PROLOGUE_END | DWARF2_FLAG_EPILOGUE_BEGIN); + current.discriminator = 0; } /* Called for each (preferably code) label. If dwarf2_loc_mark_labels @@ -434,7 +456,9 @@ get_filenum (const char *filename, unsigned int num) dir = 0; if (dir_len) { +#ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR --dir_len; +#endif for (dir = 1; dir < dirs_in_use; ++dir) if (strncmp (filename, dirs[dir], dir_len) == 0 && dirs[dir][dir_len] == '\0') @@ -449,7 +473,7 @@ get_filenum (const char *filename, unsigned int num) xrealloc (dirs, (dir + 32) * sizeof (const char *)); } - dirs[dir] = xmalloc (dir_len + 1); + dirs[dir] = (char *) xmalloc (dir_len + 1); memcpy (dirs[dir], filename, dir_len); dirs[dir][dir_len] = '\0'; dirs_in_use = dir + 1; @@ -525,6 +549,10 @@ dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) return NULL; } + /* A .file directive implies compiler generated debug information is + being supplied. Turn off gas generated debug info. */ + debug_type = DEBUG_NONE; + if (num < (int) files_in_use && files[num].filename != 0) { as_bad (_("file number %ld already allocated"), (long) num); @@ -543,7 +571,7 @@ dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) /* If we see two .loc directives in a row, force the first one to be output now. */ - if (dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2) + if (dwarf2_loc_directive_seen) dwarf2_emit_insn (0); filenum = get_absolute_expression (); @@ -563,6 +591,7 @@ dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) current.filenum = filenum; current.line = line; + current.discriminator = 0; #ifndef NO_LISTING if (listing) @@ -641,6 +670,18 @@ dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) return; } } + else if (strcmp (p, "discriminator") == 0) + { + *input_line_pointer = c; + value = get_absolute_expression (); + if (value >= 0) + current.discriminator = value; + else + { + as_bad (_("discriminator less than zero")); + return; + } + } else { as_bad (_("unknown .loc sub-directive `%s'"), p); @@ -653,6 +694,7 @@ dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) demand_empty_rest_of_line (); dwarf2_loc_directive_seen = TRUE; + debug_type = DEBUG_NONE; } void @@ -729,6 +771,14 @@ out_uleb128 (addressT value) output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); } +/* Emit a signed "little-endian base 128" number. */ + +static void +out_leb128 (addressT value) +{ + output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); +} + /* Emit a tuple for .debug_abbrev. */ static inline void @@ -763,16 +813,16 @@ get_frag_fix (fragS *frag, segT seg) static void out_set_addr (symbolS *sym) { - expressionS expr; + expressionS exp; out_opcode (DW_LNS_extended_op); out_uleb128 (sizeof_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, sizeof_address); + exp.X_op = O_symbol; + exp.X_add_symbol = sym; + exp.X_add_number = 0; + emit_expr (&exp, sizeof_address); } #if DWARF2_LINE_MIN_INSN_LENGTH > 1 @@ -869,7 +919,7 @@ emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) /* Line number sequences cannot go backward in addresses. This means we've incorrectly ordered the statements in the sequence. */ - assert ((offsetT) addr_delta >= 0); + gas_assert ((offsetT) addr_delta >= 0); /* Scale the address delta by the minimum instruction length. */ scale_addr_delta (&addr_delta); @@ -950,7 +1000,7 @@ emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) *p++ = tmp; done: - assert (p == end); + gas_assert (p == end); } /* Handy routine to combine calls to the above two routines. */ @@ -1002,13 +1052,13 @@ static void emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, char *p, int len) { - expressionS *exp; + expressionS *pexp; segT line_seg; char *end = p + len; /* Line number sequences cannot go backward in addresses. This means we've incorrectly ordered the statements in the sequence. */ - assert ((offsetT) addr_delta >= 0); + gas_assert ((offsetT) addr_delta >= 0); /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ if (line_delta != INT_MAX) @@ -1017,7 +1067,7 @@ emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, p += output_leb128 (p, line_delta, 1); } - exp = symbol_get_value_expression (frag->fr_symbol); + pexp = symbol_get_value_expression (frag->fr_symbol); line_seg = subseg_get (".debug_line", 0); /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can @@ -1028,26 +1078,26 @@ emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, if (addr_delta > 50000) { symbolS *to_sym; - expressionS expr; + expressionS exp; - assert (exp->X_op = O_subtract); - to_sym = exp->X_add_symbol; + gas_assert (pexp->X_op = O_subtract); + to_sym = pexp->X_add_symbol; *p++ = DW_LNS_extended_op; p += output_leb128 (p, sizeof_address + 1, 0); *p++ = DW_LNE_set_address; - expr.X_op = O_symbol; - expr.X_add_symbol = to_sym; - expr.X_add_number = 0; + exp.X_op = O_symbol; + exp.X_add_symbol = to_sym; + exp.X_add_number = 0; subseg_change (line_seg, 0); - emit_expr_fix (&expr, sizeof_address, frag, p); + emit_expr_fix (&exp, sizeof_address, frag, p); p += sizeof_address; } else { *p++ = DW_LNS_fixed_advance_pc; subseg_change (line_seg, 0); - emit_expr_fix (exp, 2, frag, p); + emit_expr_fix (pexp, 2, frag, p); p += 2; } @@ -1060,7 +1110,7 @@ emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, else *p++ = DW_LNS_copy; - assert (p == end); + gas_assert (p == end); } /* Generate a variant frag that we can use to relax address/line @@ -1069,13 +1119,13 @@ emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, static void relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) { - expressionS expr; + expressionS exp; int max_chars; - expr.X_op = O_subtract; - expr.X_add_symbol = to_sym; - expr.X_op_symbol = from_sym; - expr.X_add_number = 0; + exp.X_op = O_subtract; + exp.X_add_symbol = to_sym; + exp.X_op_symbol = from_sym; + exp.X_add_number = 0; /* The maximum size of the frag is the line delta with a maximum sized address delta. */ @@ -1086,7 +1136,7 @@ relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, - make_expr_symbol (&expr), line_delta, NULL); + make_expr_symbol (&exp), line_delta, NULL); } /* The function estimates the size of a rs_dwarf2dbg variant frag @@ -1139,7 +1189,7 @@ dwarf2dbg_convert_frag (fragS *frag) /* fr_var carries the max_chars that we created the fragment with. fr_subtype carries the current expected length. We must, of course, have allocated enough memory earlier. */ - assert (frag->fr_var >= (int) frag->fr_subtype); + gas_assert (frag->fr_var >= (int) frag->fr_subtype); if (DWARF2_USE_FIXED_ADVANCE_PC) emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, @@ -1189,6 +1239,14 @@ process_entries (segT seg, struct line_entry *e) out_uleb128 (column); } + if (e->loc.discriminator != 0) + { + out_opcode (DW_LNS_extended_op); + out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); + out_opcode (DW_LNE_set_discriminator); + out_uleb128 (e->loc.discriminator); + } + if (isa != e->loc.isa) { isa = e->loc.isa; @@ -1276,6 +1334,8 @@ out_file_list (void) for (i = 1; i < files_in_use; ++i) { + const char *fullfilename; + if (files[i].filename == NULL) { as_bad (_("unassigned file number %ld"), (long) i); @@ -1284,13 +1344,19 @@ out_file_list (void) continue; } - size = strlen (files[i].filename) + 1; + fullfilename = DWARF2_FILE_NAME (files[i].filename, + files[i].dir ? dirs [files [i].dir] : ""); + size = strlen (fullfilename) + 1; cp = frag_more (size); - memcpy (cp, files[i].filename, size); + memcpy (cp, fullfilename, size); out_uleb128 (files[i].dir); /* directory number */ - out_uleb128 (0); /* last modification timestamp */ - out_uleb128 (0); /* filesize */ + /* Output the last modification timestamp. */ + out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename, + files[i].dir ? dirs [files [i].dir] : "")); + /* Output the filesize. */ + out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename, + files[i].dir ? dirs [files [i].dir] : "")); } /* Terminate filename list. */ @@ -1302,7 +1368,7 @@ out_file_list (void) to the end of the section. */ static int -out_header (asection *sec, expressionS *expr) +out_header (asection *sec, expressionS *exp) { symbolS *start_sym; symbolS *end_sym; @@ -1312,26 +1378,26 @@ out_header (asection *sec, expressionS *expr) end_sym = symbol_temp_make (); /* Total length of the information. */ - expr->X_op = O_subtract; - expr->X_add_symbol = end_sym; - expr->X_op_symbol = start_sym; + exp->X_op = O_subtract; + exp->X_add_symbol = end_sym; + exp->X_op_symbol = start_sym; switch (DWARF2_FORMAT (sec)) { case dwarf2_format_32bit: - expr->X_add_number = -4; - emit_expr (expr, 4); + exp->X_add_number = -4; + emit_expr (exp, 4); return 4; case dwarf2_format_64bit: - expr->X_add_number = -12; + exp->X_add_number = -12; out_four (-1); - emit_expr (expr, 8); + emit_expr (exp, 8); return 8; case dwarf2_format_64bit_irix: - expr->X_add_number = -8; - emit_expr (expr, 8); + exp->X_add_number = -8; + emit_expr (exp, 8); return 8; } @@ -1344,23 +1410,23 @@ out_header (asection *sec, expressionS *expr) static void out_debug_line (segT line_seg) { - expressionS expr; + expressionS exp; symbolS *prologue_end; symbolS *line_end; struct line_seg *s; int sizeof_offset; - sizeof_offset = out_header (line_seg, &expr); - line_end = expr.X_add_symbol; + sizeof_offset = out_header (line_seg, &exp); + line_end = exp.X_add_symbol; /* Version. */ out_two (2); /* Length of the prologue following this length. */ prologue_end = symbol_temp_make (); - expr.X_add_symbol = prologue_end; - expr.X_add_number = - (4 + 2 + 4); - emit_expr (&expr, sizeof_offset); + exp.X_add_symbol = prologue_end; + exp.X_add_number = - (4 + 2 + 4); + emit_expr (&exp, sizeof_offset); /* Parameters of the state machine. */ out_byte (DWARF2_LINE_MIN_INSN_LENGTH); @@ -1399,7 +1465,7 @@ out_debug_ranges (segT ranges_seg) { unsigned int addr_size = sizeof_address; struct line_seg *s; - expressionS expr; + expressionS exp; unsigned int i; subseg_set (ranges_seg, 0); @@ -1424,15 +1490,15 @@ out_debug_ranges (segT ranges_seg) end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); s->text_end = end; - expr.X_op = O_symbol; - expr.X_add_symbol = beg; - expr.X_add_number = 0; - emit_expr (&expr, addr_size); + exp.X_op = O_symbol; + exp.X_add_symbol = beg; + exp.X_add_number = 0; + emit_expr (&exp, addr_size); - expr.X_op = O_symbol; - expr.X_add_symbol = end; - expr.X_add_number = 0; - emit_expr (&expr, addr_size); + exp.X_op = O_symbol; + exp.X_add_symbol = end; + exp.X_add_number = 0; + emit_expr (&exp, addr_size); } /* End of Range Entry. */ @@ -1449,13 +1515,13 @@ out_debug_aranges (segT aranges_seg, segT info_seg) { unsigned int addr_size = sizeof_address; struct line_seg *s; - expressionS expr; + expressionS exp; symbolS *aranges_end; char *p; int sizeof_offset; - sizeof_offset = out_header (aranges_seg, &expr); - aranges_end = expr.X_add_symbol; + sizeof_offset = out_header (aranges_seg, &exp); + aranges_end = exp.X_add_symbol; /* Version. */ out_two (2); @@ -1485,16 +1551,16 @@ out_debug_aranges (segT aranges_seg, segT info_seg) end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); s->text_end = end; - expr.X_op = O_symbol; - expr.X_add_symbol = beg; - expr.X_add_number = 0; - emit_expr (&expr, addr_size); + exp.X_op = O_symbol; + exp.X_add_symbol = beg; + exp.X_add_number = 0; + emit_expr (&exp, addr_size); - expr.X_op = O_subtract; - expr.X_add_symbol = end; - expr.X_op_symbol = beg; - expr.X_add_number = 0; - emit_expr (&expr, addr_size); + exp.X_op = O_subtract; + exp.X_add_symbol = end; + exp.X_op_symbol = beg; + exp.X_add_number = 0; + emit_expr (&exp, addr_size); } p = frag_more (2 * addr_size); @@ -1551,14 +1617,14 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) char producer[128]; const char *comp_dir; const char *dirname; - expressionS expr; + expressionS exp; symbolS *info_end; char *p; int len; int sizeof_offset; - sizeof_offset = out_header (info_seg, &expr); - info_end = expr.X_add_symbol; + sizeof_offset = out_header (info_seg, &exp); + info_end = exp.X_add_symbol; /* DWARF version. */ out_two (2); @@ -1581,16 +1647,16 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) if (all_segs->next == NULL) { /* DW_AT_low_pc */ - expr.X_op = O_symbol; - expr.X_add_symbol = all_segs->text_start; - expr.X_add_number = 0; - emit_expr (&expr, sizeof_address); + exp.X_op = O_symbol; + exp.X_add_symbol = all_segs->text_start; + exp.X_add_number = 0; + emit_expr (&exp, sizeof_address); /* DW_AT_high_pc */ - expr.X_op = O_symbol; - expr.X_add_symbol = all_segs->text_end; - expr.X_add_number = 0; - emit_expr (&expr, sizeof_address); + exp.X_op = O_symbol; + exp.X_add_symbol = all_segs->text_end; + exp.X_add_number = 0; + emit_expr (&exp, sizeof_address); } else { @@ -1609,9 +1675,15 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) { dirname = remap_debug_filename (dirs[files[1].dir]); len = strlen (dirname); +#ifdef TE_VMS + /* Already has trailing slash. */ + p = frag_more (len); + memcpy (p, dirname, len); +#else p = frag_more (len + 1); memcpy (p, dirname, len); INSERT_DIR_SEPARATOR (p, len); +#endif } len = strlen (files[1].filename) + 1; p = frag_more (len); @@ -1636,13 +1708,22 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) symbol_set_value_now (info_end); } +void +dwarf2_init (void) +{ + all_segs_hash = hash_new (); + last_seg_ptr = &all_segs; +} + + /* Finish the dwarf2 debug sections. We emit .debug.line if there were any .file/.loc directives, or --gdwarf2 was given, or if the - file has a non-empty .debug_info section. If we emit .debug_line, - and the .debug_info section is empty, we also emit .debug_info, - .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if - there were any .file/.loc directives, or --gdwarf2 was given and - there were any located instructions emitted. */ + file has a non-empty .debug_info section and an empty .debug_line + section. If we emit .debug_line, and the .debug_info section is + empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. + ALL_SEGS will be non-null if there were any .file/.loc directives, + or --gdwarf2 was given and there were any located instructions + emitted. */ void dwarf2_finish (void) @@ -1651,13 +1732,24 @@ dwarf2_finish (void) struct line_seg *s; segT info_seg; int emit_other_sections = 0; + int empty_debug_line = 0; info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); - if (!all_segs && emit_other_sections) - /* There is no line information and no non-empty .debug_info - section. */ + line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); + empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); + + /* We can't construct a new debug_line section if we already have one. + Give an error. */ + if (all_segs && !empty_debug_line) + as_fatal ("duplicate .debug_line sections"); + + if ((!all_segs && emit_other_sections) + || (!emit_other_sections && !empty_debug_line)) + /* If there is no line information and no non-empty .debug_info + section, or if there is both a non-empty .debug_info and a non-empty + .debug_line, then we do nothing. */ return; /* Calculate the size of an address for the target machine. */ @@ -1670,13 +1762,13 @@ dwarf2_finish (void) /* For each subsection, chain the debug entries together. */ for (s = all_segs; s; s = s->next) { - struct line_subseg *ss = s->head; - struct line_entry **ptail = ss->ptail; + struct line_subseg *lss = s->head; + struct line_entry **ptail = lss->ptail; - while ((ss = ss->next) != NULL) + while ((lss = lss->next) != NULL) { - *ptail = ss->head; - ptail = ss->ptail; + *ptail = lss->head; + ptail = lss->ptail; } } @@ -1691,7 +1783,7 @@ dwarf2_finish (void) segT aranges_seg; segT ranges_seg; - assert (all_segs); + gas_assert (all_segs); info_seg = subseg_new (".debug_info", 0); abbrev_seg = subseg_new (".debug_abbrev", 0);