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(struct stab_link_includes_totals): Add field 'symb' that keeps the characters

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in a B_INCL..B_EINCL range.
(_bfd_link_section_stabs): When computing the sum of the characters in a
B_INCL..B_EINCL range also keep a copy of those	characters.  Use this
information to distinguish between include sections that have the same sum
and the same length but which are nevertheless unique.
This commit is contained in:
Nick Clifton 2004-04-01 08:40:05 +00:00
parent a7844384e8
commit 66a695f0b6
2 changed files with 44 additions and 10 deletions
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10
bfd/ChangeLog
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@ -1,3 +1,13 @@
2004-04-01 Andy Chittenden <achittenden@bluearc.com>
* stabs.c (struct stab_link_includes_totals): Add field 'symb'
that keeps the characters in a B_INCL..B_EINCL range.
(_bfd_link_section_stabs): When computing the sum of the
characters in a B_INCL..B_EINCL range also keep a copy of those
characters. Use this information to distinguish between
include sections that have the same sum and the same length
but which are nevertheless unique.
2004-03-31 Paul Brook <paul@codesourcery.com> 2004-03-31 Paul Brook <paul@codesourcery.com>
* elf32-arm.h (elf32_arm_final_link_relocate): Add R_ARM_ALU*. * elf32-arm.h (elf32_arm_final_link_relocate): Add R_ARM_ALU*.

44
bfd/stabs.c
View File

@ -56,17 +56,19 @@ struct stab_link_includes_table
}; };
/* A linked list of totals that we have found for a particular header /* A linked list of totals that we have found for a particular header
file. A total is the sum of all the STABS characters for a particular file. A total is a unique identifier for a particular BINCL...EINCL
file and the number of these charactes. It is used to identify sequence of STABs that can be used to identify duplicate sequences.
duplicate files which can be excluded. XXX: A better method would be to It consists of three fields, 'sum_chars' which is the sum of all the
compute an MD5 checksum, but that is coding left for another day. STABS characters; 'num_chars' which is the number of these charactes
The bfd_vma type is used because it is a very large unsigned type. */ and 'symb' which is a buffer of all the symbols in the sequence. This
buffer is only checked as a last resort. */
struct stab_link_includes_totals struct stab_link_includes_totals
{ {
struct stab_link_includes_totals *next; struct stab_link_includes_totals *next;
bfd_vma sum_chars; /* Accumulated sum of STABS characters. */ bfd_vma sum_chars; /* Accumulated sum of STABS characters. */
bfd_vma num_chars; /* Number of STABS characters. */ bfd_vma num_chars; /* Number of STABS characters. */
const char* symb; /* The STABS characters themselves. */
}; };
/* An entry in the header file hash table. */ /* An entry in the header file hash table. */
@ -347,14 +349,19 @@ _bfd_link_section_stabs (abfd, psinfo, stabsec, stabstrsec, psecinfo, pstring_of
{ {
bfd_vma sum_chars; bfd_vma sum_chars;
bfd_vma num_chars; bfd_vma num_chars;
bfd_vma buf_len = 0;
char * symb;
char * symb_rover;
int nest; int nest;
bfd_byte *incl_sym; bfd_byte * incl_sym;
struct stab_link_includes_entry *incl_entry; struct stab_link_includes_entry * incl_entry;
struct stab_link_includes_totals *t; struct stab_link_includes_totals * t;
struct stab_excl_list *ne; struct stab_excl_list * ne;
symb = symb_rover = NULL;
sum_chars = num_chars = 0; sum_chars = num_chars = 0;
nest = 0; nest = 0;
for (incl_sym = sym + STABSIZE; for (incl_sym = sym + STABSIZE;
incl_sym < symend; incl_sym < symend;
incl_sym += STABSIZE) incl_sym += STABSIZE)
@ -383,6 +390,15 @@ _bfd_link_section_stabs (abfd, psinfo, stabsec, stabstrsec, psecinfo, pstring_of
+ bfd_get_32 (abfd, incl_sym + STRDXOFF)); + bfd_get_32 (abfd, incl_sym + STRDXOFF));
for (; *str != '\0'; str++) for (; *str != '\0'; str++)
{ {
if (num_chars >= buf_len)
{
buf_len += 32 * 1024;
symb = bfd_realloc (symb, buf_len);
if (symb == NULL)
goto error_return;
symb_rover = symb + num_chars;
}
* symb_rover ++ = * str;
sum_chars += *str; sum_chars += *str;
num_chars ++; num_chars ++;
if (*str == '(') if (*str == '(')
@ -397,6 +413,8 @@ _bfd_link_section_stabs (abfd, psinfo, stabsec, stabstrsec, psecinfo, pstring_of
} }
} }
BFD_ASSERT (num_chars == (bfd_vma) (symb_rover - symb));
/* If we have already included a header file with the same /* If we have already included a header file with the same
value, then replaced this one with an N_EXCL symbol. */ value, then replaced this one with an N_EXCL symbol. */
incl_entry = stab_link_includes_lookup (&sinfo->includes, string, incl_entry = stab_link_includes_lookup (&sinfo->includes, string,
@ -405,7 +423,9 @@ _bfd_link_section_stabs (abfd, psinfo, stabsec, stabstrsec, psecinfo, pstring_of
goto error_return; goto error_return;
for (t = incl_entry->totals; t != NULL; t = t->next) for (t = incl_entry->totals; t != NULL; t = t->next)
if (t->sum_chars == sum_chars && t->num_chars == num_chars) if (t->sum_chars == sum_chars
&& t->num_chars == num_chars
&& memcmp (t->symb, symb, num_chars) == 0)
break; break;
/* Record this symbol, so that we can set the value /* Record this symbol, so that we can set the value
@ -430,6 +450,7 @@ _bfd_link_section_stabs (abfd, psinfo, stabsec, stabstrsec, psecinfo, pstring_of
goto error_return; goto error_return;
t->sum_chars = sum_chars; t->sum_chars = sum_chars;
t->num_chars = num_chars; t->num_chars = num_chars;
t->symb = bfd_realloc (symb, num_chars); /* Trim data down. */
t->next = incl_entry->totals; t->next = incl_entry->totals;
incl_entry->totals = t; incl_entry->totals = t;
} }
@ -441,6 +462,9 @@ _bfd_link_section_stabs (abfd, psinfo, stabsec, stabstrsec, psecinfo, pstring_of
pass to change the type to N_EXCL. */ pass to change the type to N_EXCL. */
ne->type = (int) N_EXCL; ne->type = (int) N_EXCL;
/* Free off superfluous symbols. */
free (symb);
/* Mark the skipped symbols. */ /* Mark the skipped symbols. */
nest = 0; nest = 0;