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Re: assertion failure with gas and broken syntax
- From: Alan Modra <amodra at bigpond dot net dot au>
- To: binutils at sourceware dot org
- Date: Fri, 19 Sep 2008 19:31:43 +0930
- Subject: Re: assertion failure with gas and broken syntax
- References: <534660c60809100503v32cbed42o7127a967156ac5d7@mail.gmail.com> <48D23F36.9080602@redhat.com> <6dc9ffc80809180719k49bcf088g18b1c823d9bfd569@mail.gmail.com> <20080918231022.GA17852@bubble.grove.modra.org> <20080919021204.GD17852@bubble.grove.modra.org> <20080919023738.GE17852@bubble.grove.modra.org>
* write.c (TC_FORCE_RELOCATION_SUB_LOCAL): Heed md_register_arithmetic.
(TC_VALIDATE_FIX_SUB): Likewise.
* config/tc-frv.h (TC_FORCE_RELOCATION_SUB_LOCAL): Likewise.
* config/tc-hppa.h (TC_FORCE_RELOCATION_SUB_LOCAL): Likewise.
* config/tc-mn10300.h (TC_VALIDATE_FIX_SUB): Likewise.
* config/tc-sh.h (TC_VALIDATE_FIX_SUB): Likewise.
(TC_FORCE_RELOCATION_SUB_LOCAL): Likewise.
* config/tc-sh64.h (TC_VALIDATE_FIX_SUB): Likewise.
* config/tc-xtensa.h (TC_VALIDATE_FIX_SUB): Likewise.
* doc/internals.texi (TC_FORCE_RELOCATION_SUB_ABS,
TC_FORCE_RELOCATION_SUB_LOCAL, TC_VALIDATE_FIX_SUB): Show new param.
Index: gas/write.c
===================================================================
RCS file: /cvs/src/src/gas/write.c,v
retrieving revision 1.120
diff -u -p -r1.120 write.c
--- gas/write.c 19 Sep 2008 02:11:02 -0000 1.120
+++ gas/write.c 19 Sep 2008 06:37:11 -0000
@@ -65,20 +65,23 @@
#ifndef TC_FORCE_RELOCATION_SUB_LOCAL
#ifdef DIFF_EXPR_OK
-#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 0
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
+ (!md_register_arithmetic && (SEG) == reg_section)
#else
-#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 1
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
#endif
#endif
#ifndef TC_VALIDATE_FIX_SUB
#ifdef UNDEFINED_DIFFERENCE_OK
/* The PA needs this for PIC code generation. */
-#define TC_VALIDATE_FIX_SUB(FIX) 1
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ (md_register_arithmetic || (SEG) != reg_section)
#else
-#define TC_VALIDATE_FIX_SUB(FIX) \
- ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
- || (FIX)->fx_r_type == BFD_RELOC_GPREL16)
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ ((md_register_arithmetic || (SEG) != reg_section) \
+ && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
+ || (FIX)->fx_r_type == BFD_RELOC_GPREL16))
#endif
#endif
@@ -936,7 +939,7 @@ fixup_segment (fixS *fixP, segT this_seg
fixP->fx_subsy = NULL;
}
else if (sub_symbol_segment == this_segment
- && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP))
+ && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment))
{
add_number -= S_GET_VALUE (fixP->fx_subsy);
fixP->fx_offset = (add_number + fixP->fx_dot_value
@@ -958,7 +961,7 @@ fixup_segment (fixS *fixP, segT this_seg
fixP->fx_subsy = NULL;
fixP->fx_pcrel = 1;
}
- else if (!TC_VALIDATE_FIX_SUB (fixP))
+ else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment))
{
if (!md_register_arithmetic
&& (add_symbol_segment == reg_section
Index: gas/config/tc-frv.h
===================================================================
RCS file: /cvs/src/src/gas/config/tc-frv.h,v
retrieving revision 1.12
diff -u -p -r1.12 tc-frv.h
--- gas/config/tc-frv.h 12 Aug 2008 23:39:30 -0000 1.12
+++ gas/config/tc-frv.h 19 Sep 2008 06:37:11 -0000
@@ -61,7 +61,7 @@ extern int frv_force_relocation (struct
/* If we simplify subtractions that aren't SUB_SAME or SUB_ABS, we end
up with PCrel fixups, but since we don't have any PCrel relocs, we
crash. Preventing simplification gets us a good, early error. */
-#define TC_FORCE_RELOCATION_SUB_LOCAL(fixP) 1
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
#undef GAS_CGEN_MAX_FIXUPS
#define GAS_CGEN_MAX_FIXUPS 1
Index: gas/config/tc-hppa.h
===================================================================
RCS file: /cvs/src/src/gas/config/tc-hppa.h,v
retrieving revision 1.40
diff -u -p -r1.40 tc-hppa.h
--- gas/config/tc-hppa.h 8 Sep 2008 00:54:26 -0000 1.40
+++ gas/config/tc-hppa.h 19 Sep 2008 06:37:11 -0000
@@ -155,7 +155,7 @@ int hppa_fix_adjustable (struct fix *);
difference expression can't be used between text and data symbols,
or between symbols in different executable modules. */
#define DIFF_EXPR_OK 1
-#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 1
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
#define UNDEFINED_DIFFERENCE_OK
#endif
Index: gas/config/tc-mn10300.h
===================================================================
RCS file: /cvs/src/src/gas/config/tc-mn10300.h,v
retrieving revision 1.25
diff -u -p -r1.25 tc-mn10300.h
--- gas/config/tc-mn10300.h 13 Nov 2007 10:40:28 -0000 1.25
+++ gas/config/tc-mn10300.h 19 Sep 2008 06:37:11 -0000
@@ -70,7 +70,7 @@ void mn10300_cons_fix_new (fragS *, int,
/* We validate subtract arguments within tc_gen_reloc(), so don't
report errors at this point. */
-#define TC_VALIDATE_FIX_SUB(FIX) 1
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
/* Fixup debug sections since we will never relax them. Ideally, we
could do away with this and instead check every single fixup with
Index: gas/config/tc-sh.h
===================================================================
RCS file: /cvs/src/src/gas/config/tc-sh.h,v
retrieving revision 1.51
diff -u -p -r1.51 tc-sh.h
--- gas/config/tc-sh.h 19 Sep 2008 02:11:02 -0000 1.51
+++ gas/config/tc-sh.h 19 Sep 2008 06:37:11 -0000
@@ -83,8 +83,9 @@ extern int sh_force_relocation (struct f
|| (sh_relax && SWITCH_TABLE (FIX)))
/* Don't complain when we leave fx_subsy around. */
-#define TC_VALIDATE_FIX_SUB(FIX) \
- (sh_relax && SWITCH_TABLE (FIX))
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ ((md_register_arithmetic || (SEG) != reg_section) \
+ && sh_relax && SWITCH_TABLE (FIX))
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
extern long md_pcrel_from_section (struct fix *, segT);
@@ -207,7 +208,9 @@ extern bfd_boolean sh_fix_adjustable (st
|| (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \
|| TC_FORCE_RELOCATION (FIX))
-#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX))
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
+ ((!md_register_arithmetic && (SEG) == reg_section) \
+ || (sh_relax && SWITCH_TABLE (FIX)))
/* This keeps the subtracted symbol around, for use by PLT_PCREL
relocs. */
@@ -217,9 +220,10 @@ extern bfd_boolean sh_fix_adjustable (st
/* Don't complain when we leave fx_subsy around. */
#undef TC_VALIDATE_FIX_SUB
-#define TC_VALIDATE_FIX_SUB(FIX) \
- ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
- || (sh_relax && SWITCH_TABLE (FIX)))
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ ((md_register_arithmetic || (SEG) != reg_section) \
+ && ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
+ || (sh_relax && SWITCH_TABLE (FIX))))
#define md_parse_name(name, exprP, mode, nextcharP) \
sh_parse_name ((name), (exprP), (mode), (nextcharP))
Index: gas/config/tc-sh64.h
===================================================================
RCS file: /cvs/src/src/gas/config/tc-sh64.h,v
retrieving revision 1.15
diff -u -p -r1.15 tc-sh64.h
--- gas/config/tc-sh64.h 3 Jul 2007 11:01:05 -0000 1.15
+++ gas/config/tc-sh64.h 19 Sep 2008 06:37:12 -0000
@@ -115,10 +115,11 @@ extern int sh64_target_mach (void);
/* Don't complain when we leave fx_subsy around. */
#undef TC_VALIDATE_FIX_SUB
-#define TC_VALIDATE_FIX_SUB(FIX) \
- ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
- || (sh_relax && SWITCH_TABLE (FIX)) \
- || *symbol_get_tc ((FIX)->fx_addsy) != NULL)
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ ((md_register_arithmetic || (SEG) != reg_section) \
+ && ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
+ || (sh_relax && SWITCH_TABLE (FIX)) \
+ || *symbol_get_tc ((FIX)->fx_addsy) != NULL))
/* Note the kludge: we want to put back C, and we also want to consume the
expression, since we have handled it ourselves. FIXME: What we really
Index: gas/config/tc-xtensa.h
===================================================================
RCS file: /cvs/src/src/gas/config/tc-xtensa.h,v
retrieving revision 1.30
diff -u -p -r1.30 tc-xtensa.h
--- gas/config/tc-xtensa.h 14 Mar 2008 20:17:39 -0000 1.30
+++ gas/config/tc-xtensa.h 19 Sep 2008 06:37:12 -0000
@@ -335,7 +335,7 @@ extern char *xtensa_section_rename (char
#define TC_FORCE_RELOCATION(fix) xtensa_force_relocation (fix)
#define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
(! SEG_NORMAL (seg) || xtensa_force_relocation (fix))
-#define TC_VALIDATE_FIX_SUB(fix) xtensa_validate_fix_sub (fix)
+#define TC_VALIDATE_FIX_SUB(fix, seg) xtensa_validate_fix_sub (fix)
#define NO_PSEUDO_DOT xtensa_check_inside_bundle ()
#define tc_canonicalize_symbol_name(s) xtensa_section_rename (s)
#define tc_canonicalize_section_name(s) xtensa_section_rename (s)
Index: gas/doc/internals.texi
===================================================================
RCS file: /cvs/src/src/gas/doc/internals.texi,v
retrieving revision 1.60
diff -u -p -r1.60 internals.texi
--- gas/doc/internals.texi 12 Aug 2008 23:39:31 -0000 1.60
+++ gas/doc/internals.texi 19 Sep 2008 06:37:14 -0000
@@ -1309,17 +1309,17 @@ the subtrahend will be resolved and @cod
@w{@code{! SEG_NORMAL (@var{seg}) || TC_FORCE_RELOCATION (@var{fix})}} will
be used.
-@item TC_FORCE_RELOCATION_SUB_ABS (@var{fix})
+@item TC_FORCE_RELOCATION_SUB_ABS (@var{fix}, @var{seg)
@cindex TC_FORCE_RELOCATION_SUB_ABS
Like @code{TC_FORCE_RELOCATION_SUB_SAME}, but used when the subtrahend is an
absolute symbol. If the macro is undefined a default of @code{0} is used.
-@item TC_FORCE_RELOCATION_SUB_LOCAL (@var{fix})
+@item TC_FORCE_RELOCATION_SUB_LOCAL (@var{fix}, @var{seg)
@cindex TC_FORCE_RELOCATION_SUB_LOCAL
Like @code{TC_FORCE_RELOCATION_SUB_ABS}, but the subtrahend is a symbol in the
same section as the fixup.
-@item TC_VALIDATE_FIX_SUB (@var{fix})
+@item TC_VALIDATE_FIX_SUB (@var{fix}, @var{seg})
@cindex TC_VALIDATE_FIX_SUB
This macro is evaluated for any fixup with a @code{fx_subsy} that
@code{fixup_segment} cannot reduce to a number. If the macro returns
--
Alan Modra
Australia Development Lab, IBM