0d8a05c38e
The three patches allow to compile applications using TLS emulation from libgcc or C++ applications. The patches 892-libgcc-mkmap-symver-support-skip_underscore.patch and 893-libgcc-config-bfin-use-the-generic-linker-version-in.patch fixes how libgcc is generated, by making the necessary libgcc symbols declared "GLOBAL", and therefore visible outside of libgcc. This fixes a large number of undefined reference issues (for either C++ applications or applications using TLS emulation). This was reported as gcc PR74748. The patch 894-libgcc-fix-DWARF-compilation-with-FDPIC-targets.patch allows to build DWARF in FDPIC mode. This patch replaces the older 892-disable-dwarf-bfin.patch, as instead of disabling DWARF support, it fixes it. This was reported as gcc PR68468. In order to get C++ working without unresolved symbols, we also need to disable symbol versioning (--disable-symvers). This is a remaining issue in gcc which will be investigated at a later point. Since this commit fixes C++ support in Blackfin, it re-enables the selection of C++ support for this architecture. Fixes: (alsa-lib emutls) http://autobuild.buildroot.net/results/8544ce58d75820666579db93a25ca5656a8efa8e/ (cairo emutls) http://autobuild.buildroot.net/results/88b02a5dd5408318941ccbfcea0a9cbaa331500a/ (audiofile c++) http://autobuild.buildroot.net/results/394e530c5dcd9ccb590eb151aeaadb37d11e0e39/ (assimp c++) http://autobuild.buildroot.net/results/01f4be126c2d786a5ad7f220c2cf60539888a480/ (bellagio c++) http://autobuild.buildroot.net/results/ada/ada44228bf13ec05382275bd6571396f5ba2b1f7/ Signed-off-by: Waldemar Brodkorb <wbx@openadk.org> Tested-by: Waldemar Brodkorb <wbx@openadk.org> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
74 lines
2.4 KiB
Diff
74 lines
2.4 KiB
Diff
From 9d9f97ca5d1ceba66677bf406c9b31027dc1f22e Mon Sep 17 00:00:00 2001
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From: Waldemar Brodkorb <wbx@openadk.org>
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Date: Fri, 19 Aug 2016 13:54:46 +0200
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Subject: [PATCH] libgcc: fix DWARF compilation with FDPIC targets
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The build of unwind-dw2-fde-dip.c currently fails for FDPIC targets with
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the following error:
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libgcc/unwind-dw2-fde-dip.c:167:31: error: storage size of 'load_base' isn't known
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struct elf32_fdpic_loadaddr load_base;
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This patch addresses that by defining load_base with the appropriate
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type on FDPIC targets. It has been tested on FRV and Blackfin.
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Fixes PR gcc/68468.
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Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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---
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libgcc/ChangeLog | 5 +++++
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libgcc/unwind-dw2-fde-dip.c | 8 ++++++--
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2 files changed, 11 insertions(+), 2 deletions(-)
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diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
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index 36c0194..2e78d20 100644
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--- a/libgcc/ChangeLog
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+++ b/libgcc/ChangeLog
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@@ -1,3 +1,8 @@
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+2016-08-19 Waldemar Brodkorb <wbx@openadk.org>
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+
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+ PR gcc/68468
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+ * libgcc/unwind-dw2-fde-dip.c: fix build on FDPIC targets.
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+
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2016-08-19 Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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PR gcc/74748
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diff --git a/libgcc/unwind-dw2-fde-dip.c b/libgcc/unwind-dw2-fde-dip.c
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index f7a1c3f..801bce8 100644
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--- a/libgcc/unwind-dw2-fde-dip.c
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+++ b/libgcc/unwind-dw2-fde-dip.c
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@@ -124,7 +124,11 @@ static struct frame_hdr_cache_element
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{
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_Unwind_Ptr pc_low;
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_Unwind_Ptr pc_high;
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+#if defined __FRV_FDPIC__ || defined __BFIN_FDPIC__
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+ struct elf32_fdpic_loadaddr load_base;
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+#else
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_Unwind_Ptr load_base;
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+#endif
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const ElfW(Phdr) *p_eh_frame_hdr;
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const ElfW(Phdr) *p_dynamic;
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struct frame_hdr_cache_element *link;
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@@ -163,7 +167,7 @@ _Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr)
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struct unw_eh_callback_data *data = (struct unw_eh_callback_data *) ptr;
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const ElfW(Phdr) *phdr, *p_eh_frame_hdr, *p_dynamic;
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long n, match;
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-#ifdef __FRV_FDPIC__
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+#if defined __FRV_FDPIC__ || defined __BFIN_FDPIC__
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struct elf32_fdpic_loadaddr load_base;
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#else
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_Unwind_Ptr load_base;
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@@ -347,7 +351,7 @@ _Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr)
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break;
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}
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}
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-# elif defined __FRV_FDPIC__ && defined __linux__
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+# elif (defined __FRV_FDPIC__ || defined __BFIN_FDPIC__) && defined __linux__
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data->dbase = load_base.got_value;
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# else
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# error What is DW_EH_PE_datarel base on this platform?
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--
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2.7.4
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