The SPARC backend currently has workarounds for two bugs in old versions
of the assembler and linker. However, I find both
HAVE_AS_SPARC_UA_PCREL and HAVE_AS_SPARC_UA_PCREL_HIDDEN are always
defined as 1 on both Solaris/SPARC and Linux/sparc64.
I've checked all combinations of the assemblers supported on SPARC: the
Solaris 11.4 FCS as and ld, current Solaris as and ld, gas and gld 2.30
and 2.45. The tests work on all of those, so the workarounds can be
removed.
Bootstrapped on sparc-sun-solaris2.11 (as and gas) and
sparc64-unknown-linux-gnu.
Ok for trunk?
Rainer
--
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University
2026-01-13 Rainer Orth <[email protected]>
gcc:
* configure.ac (gcc_cv_as_sparc_ua_pcrel): Remove.
(gcc_cv_as_sparc_ua_pcrel_hidden): Likewise.
* configure: Regenerate.
* config.in: Regenerate.
* config/sparc/sparc.h (ASM_PREFERRED_EH_DATA_FORMAT): Remove
!HAVE_AS_SPARC_UA_PCREL, !HAVE_AS_SPARC_UA_PCREL_HIDDEN support.
* config/sparc/sol2.h (ASM_PREFERRED_EH_DATA_FORMAT): Remove.
* config/sparc/sparc.cc (TARGET_ASM_OUTPUT_DWARF_DTPREL): Remove
HAVE_AS_SPARC_UA_PCREL guard.
2026-01-13 Rainer Orth <[email protected]>
gcc:
* configure.ac (gcc_cv_as_sparc_ua_pcrel): Remove.
(gcc_cv_as_sparc_ua_pcrel_hidden): Likewise.
* configure: Regenerate.
* config.in: Regenerate.
* config/sparc/sparc.h (ASM_PREFERRED_EH_DATA_FORMAT): Remove
!HAVE_AS_SPARC_UA_PCREL, !HAVE_AS_SPARC_UA_PCREL_HIDDEN support.
* config/sparc/sol2.h (ASM_PREFERRED_EH_DATA_FORMAT): Remove.
* config/sparc/sparc.cc (TARGET_ASM_OUTPUT_DWARF_DTPREL): Remove
HAVE_AS_SPARC_UA_PCREL guard.
# HG changeset patch
# Parent e50aa234a0efd5eb5dd0fa5d57cecc6fb1691870
sparc: Remove HAVE_AS_SPARC_UA_PCREL, HAVE_AS_SPARC_UA_PCREL_HIDDEN
diff --git a/gcc/config.in b/gcc/config.in
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -804,20 +804,6 @@
#endif
-/* Define if your assembler and linker support unaligned PC relative relocs.
- */
-#ifndef USED_FOR_TARGET
-#undef HAVE_AS_SPARC_UA_PCREL
-#endif
-
-
-/* Define if your assembler and linker support unaligned PC relative relocs
- against hidden symbols. */
-#ifndef USED_FOR_TARGET
-#undef HAVE_AS_SPARC_UA_PCREL_HIDDEN
-#endif
-
-
/* Define if your assembler supports call36 relocation. */
#ifndef USED_FOR_TARGET
#undef HAVE_AS_SUPPORT_CALL36
diff --git a/gcc/config/sparc/sol2.h b/gcc/config/sparc/sol2.h
--- a/gcc/config/sparc/sol2.h
+++ b/gcc/config/sparc/sol2.h
@@ -41,17 +41,6 @@ along with GCC; see the file COPYING3.
/* Redue ggc-page.cc's chunk size to account for mmap red-zone pages. */
#define GGC_QUIRE_SIZE 510
-/* Select a format to encode pointers in exception handling data. CODE
- is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
- true if the symbol may be affected by dynamic relocations.
-
- Some Solaris dynamic linkers don't handle unaligned section relative
- relocs properly, so force them to be aligned. */
-#ifndef HAVE_AS_SPARC_UA_PCREL
-#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
- ((flag_pic || GLOBAL) ? DW_EH_PE_aligned : DW_EH_PE_absptr)
-#endif
-
/* Supposedly the same as vanilla sparc svr4, except for the stuff below: */
diff --git a/gcc/config/sparc/sparc.cc b/gcc/config/sparc/sparc.cc
--- a/gcc/config/sparc/sparc.cc
+++ b/gcc/config/sparc/sparc.cc
@@ -877,7 +877,7 @@ char sparc_hard_reg_printed[8];
#define TARGET_STACK_PROTECT_GUARD hook_tree_void_null
#endif
-#if !TARGET_SUN_TLS && defined(HAVE_AS_SPARC_UA_PCREL)
+#if !TARGET_SUN_TLS
#undef TARGET_ASM_OUTPUT_DWARF_DTPREL
#define TARGET_ASM_OUTPUT_DWARF_DTPREL sparc_output_dwarf_dtprel
#endif
diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h
--- a/gcc/config/sparc/sparc.h
+++ b/gcc/config/sparc/sparc.h
@@ -1279,32 +1279,13 @@ do { \
/* Select a format to encode pointers in exception handling data. CODE
is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
- true if the symbol may be affected by dynamic relocations.
-
- If assembler and linker properly support .uaword %r_disp32(foo),
- then use PC relative 32-bit relocations instead of absolute relocs
- for shared libraries. On sparc64, use pc relative 32-bit relocs even
- for binaries, to save memory.
-
- binutils 2.12 would emit a R_SPARC_DISP32 dynamic relocation if the
- symbol %r_disp32() is against was not local, but .hidden. In that
- case, we have to use DW_EH_PE_absptr for pic personality. */
-#ifdef HAVE_AS_SPARC_UA_PCREL
-#ifdef HAVE_AS_SPARC_UA_PCREL_HIDDEN
+ true if the symbol may be affected by dynamic relocations. */
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
(flag_pic \
? (GLOBAL ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4\
: ((TARGET_ARCH64 && ! GLOBAL) \
? (DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
: DW_EH_PE_absptr))
-#else
-#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
- (flag_pic \
- ? (GLOBAL ? DW_EH_PE_absptr : (DW_EH_PE_pcrel | DW_EH_PE_sdata4)) \
- : ((TARGET_ARCH64 && ! GLOBAL) \
- ? (DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
- : DW_EH_PE_absptr))
-#endif
/* Emit a PC-relative relocation. */
#define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL) \
diff --git a/gcc/configure b/gcc/configure
--- a/gcc/configure
+++ b/gcc/configure
@@ -29256,100 +29256,6 @@ if test $gcc_cv_as_sparc_gotdata_op = ye
fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for unaligned pcrel relocs" >&5
-$as_echo_n "checking assembler for unaligned pcrel relocs... " >&6; }
-if ${gcc_cv_as_sparc_ua_pcrel+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- gcc_cv_as_sparc_ua_pcrel=no
- if test x"$gcc_cv_as" != x; then
- $as_echo '.text
-foo:
- nop
-.data
-.align 4
-.byte 0
-.uaword %r_disp32(foo)' > conftest.s
- if { ac_try='$gcc_cv_as $gcc_cv_as_flags -K PIC -o conftest.o conftest.s >&5'
- { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
- (eval $ac_try) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }
- then
- if test x$gcc_cv_ld != x \
- && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
- gcc_cv_as_sparc_ua_pcrel=yes
- fi
- rm -f conftest
- else
- echo "configure: failed program was" >&5
- cat conftest.s >&5
- fi
- rm -f conftest.o conftest.s
- fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_sparc_ua_pcrel" >&5
-$as_echo "$gcc_cv_as_sparc_ua_pcrel" >&6; }
-if test $gcc_cv_as_sparc_ua_pcrel = yes; then
-
-$as_echo "#define HAVE_AS_SPARC_UA_PCREL 1" >>confdefs.h
-
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for unaligned pcrel relocs against hidden symbols" >&5
-$as_echo_n "checking assembler for unaligned pcrel relocs against hidden symbols... " >&6; }
-if ${gcc_cv_as_sparc_ua_pcrel_hidden+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- gcc_cv_as_sparc_ua_pcrel_hidden=no
- if test x"$gcc_cv_as" != x; then
- $as_echo '.data
-.align 4
-.byte 0x31
-.uaword %r_disp32(foo)
-.byte 0x32, 0x33, 0x34
-.global foo
-.hidden foo
-foo:
-.skip 4' > conftest.s
- if { ac_try='$gcc_cv_as $gcc_cv_as_flags -K PIC -o conftest.o conftest.s >&5'
- { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
- (eval $ac_try) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }
- then
- if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
- && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
- && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
- | grep ' 31000000 07323334' > /dev/null 2>&1; then
- if $gcc_cv_objdump -R conftest 2> /dev/null \
- | grep 'DISP32' > /dev/null 2>&1; then
- :
- else
- gcc_cv_as_sparc_ua_pcrel_hidden=yes
- fi
- fi
- rm -f conftest
- else
- echo "configure: failed program was" >&5
- cat conftest.s >&5
- fi
- rm -f conftest.o conftest.s
- fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_sparc_ua_pcrel_hidden" >&5
-$as_echo "$gcc_cv_as_sparc_ua_pcrel_hidden" >&6; }
-if test $gcc_cv_as_sparc_ua_pcrel_hidden = yes; then
-
-$as_echo "#define HAVE_AS_SPARC_UA_PCREL_HIDDEN 1" >>confdefs.h
-
-fi
-
-
-fi
- # unaligned pcrel relocs
-
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for offsetable %lo()" >&5
$as_echo_n "checking assembler for offsetable %lo()... " >&6; }
if ${gcc_cv_as_sparc_offsetable_lo10+:} false; then :
diff --git a/gcc/configure.ac b/gcc/configure.ac
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -4735,52 +4735,6 @@ bar:
[AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
[Define if your assembler and linker support GOTDATA_OP relocs.])])
- gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
- gcc_cv_as_sparc_ua_pcrel,
- [-K PIC],
-[.text
-foo:
- nop
-.data
-.align 4
-.byte 0
-.uaword %r_disp32(foo)],
- [if test x$gcc_cv_ld != x \
- && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
- gcc_cv_as_sparc_ua_pcrel=yes
- fi
- rm -f conftest],
- [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
- [Define if your assembler and linker support unaligned PC relative relocs.])
-
- gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
- gcc_cv_as_sparc_ua_pcrel_hidden,
- [-K PIC],
-[.data
-.align 4
-.byte 0x31
-.uaword %r_disp32(foo)
-.byte 0x32, 0x33, 0x34
-.global foo
-.hidden foo
-foo:
-.skip 4],
- [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
- && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
- && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
- | grep ' 31000000 07323334' > /dev/null 2>&1; then
- if $gcc_cv_objdump -R conftest 2> /dev/null \
- | grep 'DISP32' > /dev/null 2>&1; then
- :
- else
- gcc_cv_as_sparc_ua_pcrel_hidden=yes
- fi
- fi
- rm -f conftest],
- [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
- [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
- ]) # unaligned pcrel relocs
-
gcc_GAS_CHECK_FEATURE([offsetable %lo()],
gcc_cv_as_sparc_offsetable_lo10,
[-xarch=v9],
