From 1c7d6584a7811b7785ae5c1e378f14b5ba0971cf Mon Sep 17 00:00:00 2001 From: takeshi_hoshina Date: Mon, 2 Nov 2020 11:07:33 +0900 Subject: basesystem-jj recipes --- .../0003-x86-Stub-out-x86_local_resume.patch | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 external/poky/meta/recipes-support/libunwind/libunwind/0003-x86-Stub-out-x86_local_resume.patch (limited to 'external/poky/meta/recipes-support/libunwind/libunwind/0003-x86-Stub-out-x86_local_resume.patch') diff --git a/external/poky/meta/recipes-support/libunwind/libunwind/0003-x86-Stub-out-x86_local_resume.patch b/external/poky/meta/recipes-support/libunwind/libunwind/0003-x86-Stub-out-x86_local_resume.patch new file mode 100644 index 00000000..508ed6af --- /dev/null +++ b/external/poky/meta/recipes-support/libunwind/libunwind/0003-x86-Stub-out-x86_local_resume.patch @@ -0,0 +1,54 @@ +From f6866b9e4a6341c50eb1d923dbf48eca2ca40140 Mon Sep 17 00:00:00 2001 +From: Khem Raj +Date: Tue, 22 Mar 2016 16:19:29 +0000 +Subject: [PATCH 3/6] 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 + +Upstream-Status: Pending +Signed-off-by: Khem Raj + +--- + 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 fb9a5e3..c25ae0c 100644 +--- a/src/x86/Gos-linux.c ++++ b/src/x86/Gos-linux.c +@@ -284,27 +284,7 @@ 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); +- x86_sigreturn (sc); +- } +- else +- { +- Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip); +- setcontext (uc); +- } ++ *(volatile char *)0=0; + return -UNW_EINVAL; + } + +-- +2.20.1 + -- cgit 1.2.3-korg