diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2017-08-06 20:29:20 +0200 |
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committer | Waldemar Brodkorb <wbx@openadk.org> | 2017-08-06 20:38:39 +0200 |
commit | 50229d9ba08af42c1e2e7db11c4760c085903156 (patch) | |
tree | dfd96bfc9f5dfac37bca9377fce72b385b23d13f /toolchain/binutils/patches/2.29/xtensa-fix-memory-corruption-by-broken-sysregs.patch | |
parent | 210b0b25ee2a8bc62f921a695835d04810516357 (diff) |
binutils: update to 2.29
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Diffstat (limited to 'toolchain/binutils/patches/2.29/xtensa-fix-memory-corruption-by-broken-sysregs.patch')
-rw-r--r-- | toolchain/binutils/patches/2.29/xtensa-fix-memory-corruption-by-broken-sysregs.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/toolchain/binutils/patches/2.29/xtensa-fix-memory-corruption-by-broken-sysregs.patch b/toolchain/binutils/patches/2.29/xtensa-fix-memory-corruption-by-broken-sysregs.patch new file mode 100644 index 000000000..30103ee05 --- /dev/null +++ b/toolchain/binutils/patches/2.29/xtensa-fix-memory-corruption-by-broken-sysregs.patch @@ -0,0 +1,42 @@ +From 3c8788dbb70b40e737d4b8e30cab81406e5c5091 Mon Sep 17 00:00:00 2001 +From: Max Filippov <jcmvbkbc@gmail.com> +Date: Wed, 2 Aug 2017 00:36:05 -0700 +Subject: [PATCH] xtensa: fix memory corruption by broken sysregs + +In some xtensa configurations there may be system/user registers in +xtensa-modules with negative index. ISA initialization for such config +may clobber heap and result in program termination. +Don't update lookup table entries for register with negative indices. +They are not directly accessible via RSR/WSR/XSR or RUR/WUR, so this +change should not affect processing of valid assembly/binary code. + +bfd/ +2017-08-02 Max Filippov <jcmvbkbc@gmail.com> + + * xtensa-isa.c (xtensa_isa_init): Don't update lookup table + entries for sysregs with negative indices. + +Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> +--- +Backported from: d84ed528d4817b0ff854006b65a9f6ec75f0407a + + bfd/xtensa-isa.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/bfd/xtensa-isa.c b/bfd/xtensa-isa.c +index 8da75bea8109..8c6ee88fdeae 100644 +--- a/bfd/xtensa-isa.c ++++ b/bfd/xtensa-isa.c +@@ -292,7 +292,8 @@ xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p) + xtensa_sysreg_internal *sreg = &isa->sysregs[n]; + is_user = sreg->is_user; + +- isa->sysreg_table[is_user][sreg->number] = n; ++ if (sreg->number >= 0) ++ isa->sysreg_table[is_user][sreg->number] = n; + } + + /* Set up the interface lookup table. */ +-- +2.1.4 + |