4 files changed, 99 insertions, 11 deletions

diff --git a/meta/recipes-support/libunwind/libunwind-1.1/0001-disable-tests.patch b/meta/recipes-support/libunwind/libunwind-1.1/0001-disable-tests.patch
new file mode 100644
index 0000000000..7309ffd865
--- /dev/null
+++ b/meta/recipes-support/libunwind/libunwind-1.1/0001-disable-tests.patch
@@ -0,0 +1,31 @@
+From b07435a90bd636ee718e2238fb46c74a6dd5e069 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 22 Mar 2016 16:41:13 +0000
+Subject: [PATCH] disable tests
+
+Tests use getcontext() API which is
+not there on musl
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Inappropriate [MUSL-only]
+
+ Makefile.am | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index e24fe1e..15380e4 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -39,7 +39,7 @@ endif
+ 
+ nodist_include_HEADERS = include/libunwind-common.h
+ 
+-SUBDIRS = src tests doc
++SUBDIRS = src doc
+ 
+ noinst_HEADERS = include/dwarf.h include/dwarf_i.h include/dwarf-eh.h  \
+        include/compiler.h include/libunwind_i.h include/mempool.h      \
+-- 
+1.8.3.1
+
diff --git a/meta/recipes-support/libunwind/libunwind-1.1/0001-x86-Stub-out-x86_local_resume.patch b/meta/recipes-support/libunwind/libunwind-1.1/0001-x86-Stub-out-x86_local_resume.patch
new file mode 100644
index 0000000000..371013aaaa
--- /dev/null
+++ b/meta/recipes-support/libunwind/libunwind-1.1/0001-x86-Stub-out-x86_local_resume.patch
@@ -0,0 +1,54 @@
+From f5df01655a4b76d4fe415747de581d94ac593e6a Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 22 Mar 2016 16:19:29 +0000
+Subject: [PATCH] x86: Stub out x86_local_resume()
+
+its purpose seems
+to be unwinding across signal handler boundaries, which cannot happen
+in correct programs anyway. Replacing the whole function with
+something like *(volatile char *)0=0; (i.e. crash), gets a working
+libunwind
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Pending
+
+ src/x86/Gos-linux.c | 22 +---------------------
+ 1 file changed, 1 insertion(+), 21 deletions(-)
+
+diff --git a/src/x86/Gos-linux.c b/src/x86/Gos-linux.c
+index 31f83ba..3aaa34e 100644
+--- a/src/x86/Gos-linux.c
++++ b/src/x86/Gos-linux.c
+@@ -281,27 +281,7 @@ x86_r_uc_addr (ucontext_t *uc, int reg)
+ HIDDEN int
+ x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+ {
+-  struct cursor *c = (struct cursor *) cursor;
+-  ucontext_t *uc = c->uc;
+-
+-  /* Ensure c->pi is up-to-date.  On x86, it's relatively common to be
+-     missing DWARF unwind info.  We don't want to fail in that case,
+-     because the frame-chain still would let us do a backtrace at
+-     least.  */
+-  dwarf_make_proc_info (&c->dwarf);
+-
+-  if (unlikely (c->sigcontext_format != X86_SCF_NONE))
+-    {
+-      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+-
+-      Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
+-      sigreturn (sc);
+-    }
+-  else
+-    {
+-      Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
+-      setcontext (uc);
+-    }
++  *(volatile char *)0=0;
+   return -UNW_EINVAL;
+ }
+ #endif
+-- 
+1.8.3.1
+
diff --git a/meta/recipes-support/libunwind/libunwind.inc b/meta/recipes-support/libunwind/libunwind.inc
index f83614bf5c..1c342d3922 100644
--- a/meta/recipes-support/libunwind/libunwind.inc
+++ b/meta/recipes-support/libunwind/libunwind.inc
@@ -5,8 +5,6 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=3fced11d6df719b47505837a51c16ae5"
 DEPENDS += "libatomic-ops"
 
-SRC_URI = "${SAVANNAH_NONGNU_MIRROR}/${BPN}/${BPN}-${PV}.tar.gz"
-
 inherit autotools
 
 PACKAGECONFIG ??= ""
@@ -29,4 +27,6 @@ LDFLAGS_append_aarch64 = " -fuse-ld=gold"
 LDFLAGS_append_powerpc = " -fuse-ld=gold -mbss-plt"
 LDFLAGS_append_powerpc64 = " -fuse-ld=gold -mbss-plt"
 
+SECURITY_LDFLAGS_append_libc-musl = " -lssp_nonshared -lssp"
+
 BBCLASSEXTEND = "native"
diff --git a/meta/recipes-support/libunwind/libunwind_1.1.bb b/meta/recipes-support/libunwind/libunwind_1.1.bb
index 7df9f5ee05..1ed525f515 100644
--- a/meta/recipes-support/libunwind/libunwind_1.1.bb
+++ b/meta/recipes-support/libunwind/libunwind_1.1.bb
@@ -1,15 +1,18 @@
 require libunwind.inc
 
-SRC_URI += "\
-    file://Support-building-with-older-compilers.patch \
-    file://AArch64-port.patch \
-    file://Fix-test-case-link-failure-on-PowerPC-systems-with-Altivec.patch \
-    file://Link-libunwind-to-libgcc_s-rather-than-libgcc.patch \
-    file://0001-Invalid-dwarf-opcodes-can-cause-references-beyond-th.patch \
-    file://Add-AO_REQUIRE_CAS-to-fix-build-on-ARM-v6.patch \
-    file://0001-backtrace-Use-only-with-glibc-and-uclibc.patch \
+SRC_URI = "${SAVANNAH_NONGNU_MIRROR}/${BPN}/${BPN}-${PV}.tar.gz \
+           file://Support-building-with-older-compilers.patch \
+           file://AArch64-port.patch \
+           file://Fix-test-case-link-failure-on-PowerPC-systems-with-Altivec.patch \
+           file://Link-libunwind-to-libgcc_s-rather-than-libgcc.patch \
+           file://0001-Invalid-dwarf-opcodes-can-cause-references-beyond-th.patch \
+           file://Add-AO_REQUIRE_CAS-to-fix-build-on-ARM-v6.patch \
+           file://0001-backtrace-Use-only-with-glibc-and-uclibc.patch \
+"
+SRC_URI_append_libc-musl = "\
+           file://0001-x86-Stub-out-x86_local_resume.patch \
+           file://0001-disable-tests.patch \
 "
-
 SRC_URI[md5sum] = "fb4ea2f6fbbe45bf032cd36e586883ce"
 SRC_URI[sha256sum] = "9dfe0fcae2a866de9d3942c66995e4b460230446887dbdab302d41a8aee8d09a"