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* stabsread.c (define_symbol): Only combine a p/r pair into a

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LOC_REGPARM if REG_STRUCT_HAS_ADDR.
This commit is contained in:
Jim Kingdon 1993-12-25 19:50:45 +00:00
parent 008d4449a7
commit 28f851f93a
2 changed files with 23 additions and 7 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
Sat Dec 25 13:39:21 1993 Jim Kingdon (kingdon@lioth.cygnus.com)
* stabsread.c (define_symbol): Only combine a p/r pair into a
LOC_REGPARM if REG_STRUCT_HAS_ADDR.
Sat Dec 25 09:50:29 1993 Peter Schauer (pes@regent.e-technik.tu-muenchen.de)
* valops.c (value_struct_elt): Check for (value)-1 return from

25
gdb/stabsread.c
View file

@ -450,6 +450,10 @@ read_type_number (pp, typenums)
static char *type_synonym_name;
#if !defined (REG_STRUCT_HAS_ADDR)
#define REG_STRUCT_HAS_ADDR(gcc_p) 0
#endif
/* ARGSUSED */
struct symbol *
define_symbol (valu, string, desc, type, objfile)
@ -925,16 +929,27 @@ define_symbol (valu, string, desc, type, objfile)
SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
}
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
if (within_function)
if (within_function
&& REG_STRUCT_HAS_ADDR (processing_gcc_compilation)
&& (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
|| TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION))
{
/* Sun cc uses a pair of symbols, one 'p' and one 'r' with the same
name to represent an argument passed in a register.
GCC uses 'P' for the same case. So if we find such a symbol pair
we combine it into one 'P' symbol.
But we only do this in the REG_STRUCT_HAS_ADDR case, so that
we can still get information about what is going on with the
stack (VAX for computing args_printed, possible future changes
to use stack slots instead of saved registers in backtraces,
etc.).
Note that this code illegally combines
main(argc) int argc; { register int argc = 1; }
main(argc) struct foo argc; { register struct foo argc; }
but this case is considered pathological and causes a warning
from a decent compiler. */
if (local_symbols
&& local_symbols->nsyms > 0)
{
@ -1123,13 +1138,9 @@ define_symbol (valu, string, desc, type, objfile)
If REG_STRUCT_HAS_ADDR yields non-zero we have to convert LOC_REGPARM
to LOC_REGPARM_ADDR for structures and unions. */
#if !defined (REG_STRUCT_HAS_ADDR)
#define REG_STRUCT_HAS_ADDR(gcc_p) 0
#endif
if (SYMBOL_CLASS (sym) == LOC_REGPARM
&& REG_STRUCT_HAS_ADDR (processing_gcc_compilation)
&& ( (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT)
&& ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT)
|| (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)))
SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;