[PATCH] fix linker name for uClibc
Hi,
uClibc-ng can be used for Microblaze architecture.
It is regulary tested with qemu-system-microblaze in little and
big endian mode.
2016-10-28 Waldemar Brodkorb
gcc/
* config/microblaze/linux.h: add UCLIBC_DYNAMIC_LINKER
diff --git a/gcc/config/microblaze/linux.h b/gcc/config/microblaze/linux.h
index ae8523c..b3bf43a 100644
--- a/gcc/config/microblaze/linux.h
+++ b/gcc/config/microblaze/linux.h
@@ -29,6 +29,7 @@
#define TLS_NEEDS_GOT 1
#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
#if TARGET_BIG_ENDIAN_DEFAULT == 0 /* LE */
#define MUSL_DYNAMIC_LINKER_E "%{mbig-endian:;:el}"
best regards
Waldemar
[PATCH v2] libgcc/mkmap-symver: support skip_underscore (PR74748)
Hi,
Some platforms, such as Blackfin, have a special prefix for assembly
symbols as opposed to C symbols. For this reason, a function named
"foo()" in C will in fact be visible as a symbol called "_foo" in the
ELF binary.
The current linker version script logic in libgcc doesn't take into
account this situation properly. The Blackfin specific
libgcc/config/bfin/libgcc-glibc.ver has an additional "_" in front of
every symbol so that it matches the output of "nm" (which gets parsed to
produce the final linker version script). But due to this additional
"_", ld no longer matches with the symbols since "ld" does the matching
with the original symbol name, not the one prefixed with "_".
Due to this, none of the symbols in libgcc/config/bfin/libgcc-glibc.ver
are actually matched with symbols in libgcc. This causes all libgcc
symbols to be left as "LOCAL", which causes lots of "undefined
reference" whenever some C or C++ code that calls a function of libgcc
is compiled.
To address this, this commit introduces a "skip_underscore" variable to
the mkmap-symver script. It tells mkmap-symver to ignore the leading
underscore from the "nm" output.
Note that this new argument is different from the existing
"leading_underscore" argument, which *adds* an additional underscore to
the generated linker version script.
Having this functionality paves the way to using the generic linker
version information for Blackfin, instead of using a custom one.
Signed-off-by: Thomas Petazzoni
Tested-by: Waldemar Brodkorb
2016-11-26 Thomas Petazzoni
PR gcc/74748
* libgcc/mkmap-symver.awk: add support for skip_underscore
diff --git a/libgcc/mkmap-symver.awk b/libgcc/mkmap-symver.awk
index 266832a..0a57d31 100644
--- a/libgcc/mkmap-symver.awk
+++ b/libgcc/mkmap-symver.awk
@@ -47,7 +47,11 @@ state == "nm" && ($1 == "U" || $2 == "U") {
state == "nm" && NF == 3 {
split ($3, s, "@")
- def[s[1]] = 1;
+ if (skip_underscore && substr(s[1], 1, 1) == "_")
+ symname = substr(s[1], 2);
+ else
+ symname = s[1];
+ def[symname] = 1;
sawsymbol = 1;
next;
}
Thanks in advance,
Waldemar
[PATCH] add common CPP_SPECS for bfin
Hi,
add common defines _REENTRANT and _POSIX_SOURCE for bfin.
Patch is used in Buildroot for a while to fix issues compiling
some software.
See here, why this should be always enabled:
https://lists.gnu.org/archive/html/autoconf-archive-maintainers/2016-06/msg1.html
2016-11-29 Waldemar Brodkorb
gcc/
* gcc/config/bfin/linux.h: add common CPP_SPEC.
diff --git a/gcc/config/bfin/linux.h b/gcc/config/bfin/linux.h
index c02ff44..0922493 100644
--- a/gcc/config/bfin/linux.h
+++ b/gcc/config/bfin/linux.h
@@ -38,6 +38,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If
not, see
"%{static:--start-group} %{mfast-fp:-lbffastfp} %G %L %{static:--end-group} \
%{!static:%{mfast-fp:-lbffastfp} %G}"
+#undef CPP_SPEC
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
+
#undef LINK_SPEC
#define LINK_SPEC "\
%{mfdpic: -m elf32bfinfd -z text} %{shared} %{pie} \
[PATCH] fix PR71721
Hi,
it would be nice if uclinux targets are allowed to enable posix threads.
Together with uClibc-ng/uClibc you can build m68k-nommu toolchain and enable
old Linuxthreads instead of NPTL/TLS. With following change it is possible to
build
boost, which checks if gcc is build with threads enabled.
Tested with a simple boost application on qemu-system-m68k emulating a coldfire
board without MMU. Other noMMU targets as cortex-m3/cortex-m4 will benefit from
this change, too.
The patch is used in Buildroot for a while without causing issues.
2016-12-02 Waldemar Brodkorb
gcc/
* gcc/config.gcc: Enable posix threads.
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 98267d8..6a95009 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -831,6 +831,9 @@ case ${target} in
*-*-uclinux*)
extra_options="$extra_options gnu-user.opt"
use_gcc_stdint=wrap
+ case ${enable_threads} in
+"" | yes | posix) thread_file='posix' ;;
+ esac
tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC SINGLE_LIBC"
;;
*-*-rdos*)
[PATCH] fix PR68468
Hi,
the following patch fixes PR68468.
Patch is used for a while in Buildroot without issues.
2016-11-05 Waldemar Brodkorb
PR gcc/68468
* libgcc/unwind-dw2-fde-dip.c: fix build on FDPIC targets.
diff --git a/libgcc/unwind-dw2-fde-dip.c b/libgcc/unwind-dw2-fde-dip.c
index f7a1c3f..801bce8 100644
--- a/libgcc/unwind-dw2-fde-dip.c
+++ b/libgcc/unwind-dw2-fde-dip.c
@@ -124,7 +124,11 @@ static struct frame_hdr_cache_element
{
_Unwind_Ptr pc_low;
_Unwind_Ptr pc_high;
+#if defined __FRV_FDPIC__ || defined __BFIN_FDPIC__
+ struct elf32_fdpic_loadaddr load_base;
+#else
_Unwind_Ptr load_base;
+#endif
const ElfW(Phdr) *p_eh_frame_hdr;
const ElfW(Phdr) *p_dynamic;
struct frame_hdr_cache_element *link;
@@ -163,7 +167,7 @@ _Unwind_IteratePhdrCallback (struct dl_phdr_info *info,
size_t size, void *ptr)
struct unw_eh_callback_data *data = (struct unw_eh_callback_data *) ptr;
const ElfW(Phdr) *phdr, *p_eh_frame_hdr, *p_dynamic;
long n, match;
-#ifdef __FRV_FDPIC__
+#if defined __FRV_FDPIC__ || defined __BFIN_FDPIC__
struct elf32_fdpic_loadaddr load_base;
#else
_Unwind_Ptr load_base;
@@ -347,7 +351,7 @@ _Unwind_IteratePhdrCallback (struct dl_phdr_info *info,
size_t size, void *ptr)
break;
}
}
-# elif defined __FRV_FDPIC__ && defined __linux__
+# elif (defined __FRV_FDPIC__ || defined __BFIN_FDPIC__) && defined __linux__
data->dbase = load_base.got_value;
# else
# error What is DW_EH_PE_datarel base on this platform?
Best regards
Waldemar
[PATCH] libgcc/mkmap-symver: support skip_underscore (PR74748)
Hi,
Some platforms, such as Blackfin, have a special prefix for assembly
symbols as opposed to C symbols. For this reason, a function named
"foo()" in C will in fact be visible as a symbol called "_foo" in the
ELF binary.
The current linker version script logic in libgcc doesn't take into
account this situation properly. The Blackfin specific
libgcc/config/bfin/libgcc-glibc.ver has an additional "_" in front of
every symbol so that it matches the output of "nm" (which gets parsed to
produce the final linker version script). But due to this additional
"_", ld no longer matches with the symbols since "ld" does the matching
with the original symbol name, not the one prefixed with "_".
Due to this, none of the symbols in libgcc/config/bfin/libgcc-glibc.ver
are actually matched with symbols in libgcc. This causes all libgcc
symbols to be left as "LOCAL", which causes lots of "undefined
reference" whenever some C or C++ code that calls a function of libgcc
is compiled.
To address this, this commit introduces a "skip_underscore" variable to
the mkmap-symver script. It tells mkmap-symver to ignore the leading
underscore from the "nm" output.
Note that this new argument is different from the existing
"leading_underscore" argument, which *adds* an additional underscore to
the generated linker version script.
Having this functionality paves the way to using the generic linker
version information for Blackfin, instead of using a custom one.
Signed-off-by: Thomas Petazzoni
Tested-by: Waldemar Brodkorb
2016-11-06 Thomas Petazzoni
PR gcc/74748
* libgcc/mkmap-symver.awk: add support for skip_underscore
diff --git a/libgcc/mkmap-symver.awk b/libgcc/mkmap-symver.awk
index 266832a..30bb179 100644
--- a/libgcc/mkmap-symver.awk
+++ b/libgcc/mkmap-symver.awk
@@ -47,7 +47,11 @@ state == "nm" && ($1 == "U" || $2 == "U") {
state == "nm" && NF == 3 {
split ($3, s, "@")
- def[s[1]] = 1;
+ if (skip_underscore)
+ symname = substr(s[1], 2);
+ else
+ symname = s[1];
+ def[symname] = 1;
sawsymbol = 1;
next;
}
Thanks in advance,
Waldemar
[PATCH] libgcc/config/bfin: use the generic linker version information (PR74748)
Hi,
This commit makes the Blackfin platform use the generic linker version
information, rather than a completely duplicated file, specific for the
Blackfin architecture.
This is made possible using the newly introduced skip_underscore
variable of the mkmap-symver script.
This also allows to get a correct linker version file, with symbol names
matching the ones found in libgcc. Thanks to this, the necessary symbols
are marked "GLOBAL" instead of "LOCAL", which makes them visible at link
time, and solves a large number of "undefined reference"
issues. Indeed, the Blackfin specific linker version script had an extra
underscore in front of all symbols, which meant none of them matched the
symbols in libgcc, and therefore all libgcc symbols were marked as
"LOCAL", making them invisible for linking.
Signed-off-by: Thomas Petazzoni
Tested-by: Waldemar Brodkorb
2016-11-06 Thomas Petazzoni
PR gcc/74748
* libgcc/config/bfin/libgcc-glibc.ver, libgcc/config/bfin/t-linux:
use generic linker version information on Blackfin.
diff --git a/libgcc/config/bfin/libgcc-glibc.ver
b/libgcc/config/bfin/libgcc-glibc.ver
index b1bd2df..2af3df7 100644
--- a/libgcc/config/bfin/libgcc-glibc.ver
+++ b/libgcc/config/bfin/libgcc-glibc.ver
@@ -16,1898 +16,8 @@
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
-GCC_3.0 {
- # libgcc1 integer symbols
- ___absvsi2
- ___addvsi3
- ___ashlsi3
- ___ashrsi3
- ___divsi3
- ___lshrsi3
- ___modsi3
- ___mulsi3
- ___mulvsi3
- ___negvsi2
- ___subvsi3
- ___udivsi3
- ___umodsi3
-
- # libgcc1 floating point symbols
- ___addsf3
- ___adddf3
- ___addxf3
- ___addtf3
- ___divsf3
- ___divdf3
- ___divxf3
- ___divtf3
- ___eqsf2
- ___eqdf2
- ___eqxf2
- ___eqtf2
- ___extenddfxf2
- ___extenddftf2
- ___extendsfdf2
- ___extendsfxf2
- ___extendsftf2
- ___fixsfsi
- ___fixdfsi
- ___fixxfsi
- ___fixtfsi
- ___floatsisf
- ___floatsidf
- ___floatsixf
- ___floatsitf
- ___gesf2
- ___gedf2
- ___gexf2
- ___getf2
- ___gtsf2
- ___gtdf2
- ___gtxf2
- ___gttf2
- ___lesf2
- ___ledf2
- ___lexf2
- ___letf2
- ___ltsf2
- ___ltdf2
- ___ltxf2
- ___lttf2
- ___mulsf3
- ___muldf3
- ___mulxf3
- ___multf3
- ___negsf2
- ___negdf2
- ___negxf2
- ___negtf2
- ___nesf2
- ___nedf2
- ___nexf2
- ___netf2
- ___subsf3
- ___subdf3
- ___subxf3
- ___subtf3
- ___truncdfsf2
- ___truncxfsf2
- ___trunctfsf2
- ___truncxfdf2
- ___trunctfdf2
-
- # libgcc2 DImode arithmetic (for 32-bit targets).
- ___absvdi2
- ___addvdi3
- ___ashldi3
- ___ashrdi3
- ___cmpdi2
- ___divdi3
- ___ffsdi2
- ___fixdfdi
- ___fixsfdi
- ___fixtfdi
- ___fixxfdi
- ___fixunsdfdi
- ___fixunsdfsi
- ___fixunssfsi
- ___fixunssfdi
- ___fixunstfdi
- ___fixunstfsi
- ___fixunsxfdi
- ___fixunsxfsi
- ___floatdidf
- ___floatdisf
- ___floatdixf
- ___floatditf
- ___lshrdi3
- ___moddi3
- ___muldi3
- ___mulvdi3
- ___negdi2
- ___negvdi2
- ___subvdi3
- ___ucmpdi2
- ___udivdi3
- ___udivmoddi4
- ___umoddi3
-
- # libgcc2 TImode arithmetic (for 64-bit targets).
- ___ashlti3
- ___ashrti3
- ___cmpti2
- ___divti3
- ___ffsti2
- ___fixdfti
- ___fixsfti
- ___fixtfti
- ___fixxfti
- ___lshrti3
- ___modti3
- ___multi3
- ___negti2
- ___ucmpti2
- ___udivmodti4
- ___udivti3
- ___umodti3
- ___fixunsdfti
- ___fixunssfti
- ___fixunstfti
- ___fixunsxfti
- ___floattidf
- ___floattisf
- ___floattixf
- ___floattitf
-
- # Used to deal with trampoline initialization on some platforms
- ___clear_cache
-
- # EH symbols
- __Unwind_DeleteException
- __Unwind_Find_FDE
- __Unwind_ForcedUnwind
- __Unwind_GetGR
- __Unwind_GetIP
- __Unwind_GetLanguageSpecificData
- __Unwind_GetRegionStart
- __Unwind_GetTextRelBase
- __Unwind_GetDataRelBase
- __Unwind_RaiseException
- __Unwind_Resume
- __Unwind_SetGR
- __Unwind_SetIP
- ___deregister_frame
- ___deregister_frame_info
- ___deregister_frame_info_bases
- ___register_frame
- ___register_frame_info
- ___register_frame_info_bases
- ___register_frame_info_table
- ___register_frame_info_table_bases
- ___register_frame_table
-
- # SjLj EH symbols
- __Unwind_SjLj_Register
- __Unwind_SjLj_Unregister
- __Unwind_SjLj_RaiseException
- __Unwind_SjLj_ForcedUnwind
- __Unwind_SjLj_Resume
-}
-
-%inherit GCC_3.3 GCC_3.0
-GCC_3.3 {
- __Unwind_FindEnclosingFunction
- __Unwind_GetCFA
- __Unwind_Backtrace
- __Unwind_Resume_or_Rethrow
- __Unwind_SjLj_Resume_or_Rethrow
-}
-
-%inherit GCC_3.3.1 GCC_3.3
-GCC_3.3.1 {
- ___gcc_personality_sj0
- ___gcc_personality_v0
-}
-
-%inherit GCC_3.3.2 GCC_3.3.1
-GCC_3.3.2 {
-}
-%inherit GCC_3.3.4 GCC_3.3.2
-GCC_3.3.4 {
- ___unorddf2
- ___unordsf2
-}
-
-%inherit GCC_3.4 GCC_3.3.4
-GCC_3.4 {
- # bit scanning and counting built-ins
- ___clzsi2
- ___clzdi2
- ___clzti2
- ___ctzsi2
- ___ctzdi2
- ___ctzti2
- ___popcountsi2
- ___popcountdi2
- ___popcountti2
- ___paritysi2
- ___pari
Re: [PATCH] fix PR68468
Hi, Jakub Jelinek wrote, > On Wed, Nov 09, 2016 at 04:08:39PM +0100, Bernd Schmidt wrote: > > On 11/05/2016 06:14 PM, Waldemar Brodkorb wrote: > > >Hi, > > > > > >the following patch fixes PR68468. > > >Patch is used for a while in Buildroot without issues. > > > > > >2016-11-05 Waldemar Brodkorb > > Two spaces before < instead of just one. > > > > > > PR gcc/68468 > > PR libgcc/68468 > instead. > > > > * libgcc/unwind-dw2-fde-dip.c: fix build on FDPIC targets. > > Capital F in Fix. > No libgcc/ prefix for files in libgcc/ChangeLog. > > > This is ok. > > I think Waldemar does not have SVN write access, are you going to check it > in or who will do that? Should I resend the patch with the suggested fixes or will someone with write access fix it up for me? Thanks Waldemar
Re: [PATCH] fix PR68468
Hi Jakub, Jakub Jelinek wrote, > On Wed, Nov 16, 2016 at 07:31:59AM +0100, Waldemar Brodkorb wrote: > > > On Wed, Nov 09, 2016 at 04:08:39PM +0100, Bernd Schmidt wrote: > > > > On 11/05/2016 06:14 PM, Waldemar Brodkorb wrote: > > > > >Hi, > > > > > > > > > >the following patch fixes PR68468. > > > > >Patch is used for a while in Buildroot without issues. > > > > > > > > > >2016-11-05 Waldemar Brodkorb > > > > > > Two spaces before < instead of just one. > > > > > > > > > > PR gcc/68468 > > > > > > PR libgcc/68468 > > > instead. > > > > > > > > * libgcc/unwind-dw2-fde-dip.c: fix build on FDPIC targets. > > > > > > Capital F in Fix. > > > No libgcc/ prefix for files in libgcc/ChangeLog. > > > > > > > This is ok. > > > > > > I think Waldemar does not have SVN write access, are you going to check it > > > in or who will do that? > > > > Should I resend the patch with the suggested fixes or will someone > > with write access fix it up for me? > > As nobody committed it yet, I've made the changes and committed it for you. Thanks! Waldemar
