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Recognize obsolete form of AT_element_list attribute still used by AT&T 

compilers on one platform, and possibly more.
This commit is contained in:
Fred Fish 1991-11-20 13:07:12 +00:00
parent f7c88ce784
commit 768be6e12b
2 changed files with 37 additions and 4 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
Wed Nov 20 05:04:40 1991 Fred Fish (fnf at cygnus.com)
* dwarfread.c: Recognize obsolete form of AT_element_list
attribute still used by at least one AT&T compiler, and possibly
more.
Tue Nov 19 07:53:55 1991 Fred Fish (fnf at cygnus.com)
* dwarfread.c (enum_type, struct_type): Ignore names invented by

35
gdb/dwarfread.c
View File

@ -96,6 +96,17 @@ typedef unsigned int DIEREF; /* Reference to a DIE */
#define STREQ(a,b) (strcmp(a,b)==0)
/* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a
FORM_BLOCK2, and this is the value emitted by the AT&T compiler.
However, the Issue 2 DWARF specification from AT&T defines it as
a FORM_BLOCK4, as does the latest specification from UI/PLSIG.
For backwards compatibility with the AT&T compiler produced executables
we define AT_short_element_list for this variant. */
#define AT_short_element_list (0x00f0|FORM_BLOCK2)
/* External variables referenced. */
extern CORE_ADDR startup_file_start; /* From blockframe.c */
extern CORE_ADDR startup_file_end; /* From blockframe.c */
extern CORE_ADDR entry_scope_lowpc; /* From blockframe.c */
@ -172,6 +183,7 @@ struct dieinfo {
short at_prototyped;
unsigned int has_at_low_pc:1;
unsigned int has_at_stmt_list:1;
unsigned int short_element_list:1;
};
static int diecount; /* Approximate count of dies for compilation unit */
@ -1319,7 +1331,8 @@ DEFUN(enum_type, (dip), struct dieinfo *dip)
char *tpart3;
char *scan;
char *listend;
long temp;
long ltemp;
short stemp;
if ((type = lookup_utype (dip -> dieref)) == NULL)
{
@ -1347,9 +1360,18 @@ DEFUN(enum_type, (dip), struct dieinfo *dip)
TYPE_NAME (type) = concat (tpart1, tpart2, tpart3, NULL);
if ((scan = dip -> at_element_list) != NULL)
{
(void) memcpy (&temp, scan, sizeof (temp));
listend = scan + temp + sizeof (temp);
scan += sizeof (temp);
if (dip -> short_element_list)
{
(void) memcpy (&stemp, scan, sizeof (stemp));
listend = scan + stemp + sizeof (stemp);
scan += sizeof (stemp);
}
else
{
(void) memcpy (&ltemp, scan, sizeof (ltemp));
listend = scan + ltemp + sizeof (ltemp);
scan += sizeof (ltemp);
}
while (scan < listend)
{
new = (struct nextfield *) alloca (sizeof (struct nextfield));
@ -3472,6 +3494,11 @@ DEFUN(completedieinfo, (dip), struct dieinfo *dip)
break;
case AT_element_list:
dip -> at_element_list = diep;
dip -> short_element_list = 0;
break;
case AT_short_element_list:
dip -> at_element_list = diep;
dip -> short_element_list = 1;
break;
case AT_discr_value:
dip -> at_discr_value = diep;