mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2024-12-26 07:51:06 +00:00
c175b21ce4
Bring in the fixes for GCC 7 through 13. https://rtx.meta.security/mitigation/2023/09/12/CVE-2023-4039.html https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64 Signed-off-by: Chris Packham <judge.packham@gmail.com>
100 lines
3.6 KiB
Diff
100 lines
3.6 KiB
Diff
From c940aadecb4f623a39abe16b6c62b307e2b10638 Mon Sep 17 00:00:00 2001
|
|
From: Richard Sandiford <richard.sandiford@arm.com>
|
|
Date: Tue, 8 Aug 2023 01:57:26 +0100
|
|
Subject: [PATCH 39/42] aarch64: Simplify probe of final frame allocation
|
|
|
|
Previous patches ensured that the final frame allocation only needs
|
|
a probe when the size is strictly greater than 1KiB. It's therefore
|
|
safe to use the normal 1024 probe offset in all cases.
|
|
|
|
The main motivation for doing this is to simplify the code and
|
|
remove the number of special cases.
|
|
|
|
gcc/
|
|
* config/aarch64/aarch64.c (aarch64_allocate_and_probe_stack_space):
|
|
Always probe the residual allocation at offset 1024, asserting
|
|
that that is in range.
|
|
|
|
gcc/testsuite/
|
|
* gcc.target/aarch64/stack-check-prologue-17.c: Expect the probe
|
|
to be at offset 1024 rather than offset 0.
|
|
* gcc.target/aarch64/stack-check-prologue-18.c: Likewise.
|
|
---
|
|
gcc/config/aarch64/aarch64.c | 12 ++++--------
|
|
.../gcc.target/aarch64/stack-check-prologue-17.c | 2 +-
|
|
.../gcc.target/aarch64/stack-check-prologue-18.c | 4 ++--
|
|
3 files changed, 7 insertions(+), 11 deletions(-)
|
|
|
|
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
|
|
index 3d73c5f352f6..37c6219b07ab 100644
|
|
--- a/gcc/config/aarch64/aarch64.c
|
|
+++ b/gcc/config/aarch64/aarch64.c
|
|
@@ -8153,16 +8153,12 @@ aarch64_allocate_and_probe_stack_space (rtx temp1, rtx temp2,
|
|
are still safe. */
|
|
if (residual)
|
|
{
|
|
- HOST_WIDE_INT residual_probe_offset = guard_used_by_caller;
|
|
+ gcc_assert (guard_used_by_caller + byte_sp_alignment <= size);
|
|
+
|
|
/* If we're doing final adjustments, and we've done any full page
|
|
allocations then any residual needs to be probed. */
|
|
if (final_adjustment_p && rounded_size != 0)
|
|
min_probe_threshold = 0;
|
|
- /* If doing a small final adjustment, we always probe at offset 0.
|
|
- This is done to avoid issues when the final adjustment is smaller
|
|
- than the probing offset. */
|
|
- else if (final_adjustment_p && rounded_size == 0)
|
|
- residual_probe_offset = 0;
|
|
|
|
aarch64_sub_sp (temp1, temp2, residual, frame_related_p);
|
|
if (residual >= min_probe_threshold)
|
|
@@ -8173,8 +8169,8 @@ aarch64_allocate_and_probe_stack_space (rtx temp1, rtx temp2,
|
|
HOST_WIDE_INT_PRINT_DEC " bytes, probing will be required."
|
|
"\n", residual);
|
|
|
|
- emit_stack_probe (plus_constant (Pmode, stack_pointer_rtx,
|
|
- residual_probe_offset));
|
|
+ emit_stack_probe (plus_constant (Pmode, stack_pointer_rtx,
|
|
+ guard_used_by_caller));
|
|
emit_insn (gen_blockage ());
|
|
}
|
|
}
|
|
diff --git a/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-17.c b/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-17.c
|
|
index 0d8a25d73a24..f0ec1389771d 100644
|
|
--- a/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-17.c
|
|
+++ b/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-17.c
|
|
@@ -33,7 +33,7 @@ int test1(int z) {
|
|
** ...
|
|
** str x30, \[sp\]
|
|
** sub sp, sp, #1040
|
|
-** str xzr, \[sp\]
|
|
+** str xzr, \[sp, #?1024\]
|
|
** cbnz w0, .*
|
|
** bl g
|
|
** ...
|
|
diff --git a/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-18.c b/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-18.c
|
|
index b646f040b54e..71d33ba34e9e 100644
|
|
--- a/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-18.c
|
|
+++ b/gcc/testsuite/gcc.target/aarch64/stack-check-prologue-18.c
|
|
@@ -10,7 +10,7 @@ void g();
|
|
** str x30, \[sp\]
|
|
** ...
|
|
** sub sp, sp, #4064
|
|
-** str xzr, \[sp\]
|
|
+** str xzr, \[sp, #?1024\]
|
|
** cbnz w0, .*
|
|
** bl g
|
|
** ...
|
|
@@ -52,7 +52,7 @@ int test1(int z) {
|
|
** str x30, \[sp\]
|
|
** ...
|
|
** sub sp, sp, #1040
|
|
-** str xzr, \[sp\]
|
|
+** str xzr, \[sp, #?1024\]
|
|
** cbnz w0, .*
|
|
** bl g
|
|
** ...
|
|
--
|
|
2.42.0
|
|
|