diff options
Diffstat (limited to 'import-layers/yocto-poky/meta/recipes-support/libunwind/libunwind/0001-x86-Stub-out-x86_local_resume.patch')
-rw-r--r-- | import-layers/yocto-poky/meta/recipes-support/libunwind/libunwind/0001-x86-Stub-out-x86_local_resume.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/import-layers/yocto-poky/meta/recipes-support/libunwind/libunwind/0001-x86-Stub-out-x86_local_resume.patch b/import-layers/yocto-poky/meta/recipes-support/libunwind/libunwind/0001-x86-Stub-out-x86_local_resume.patch new file mode 100644 index 000000000..371013aaa --- /dev/null +++ b/import-layers/yocto-poky/meta/recipes-support/libunwind/libunwind/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 + |