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| author | Andreas Krebbel <krebbel@linux.ibm.com> | 2020-05-14 08:16:27 +0200 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.ibm.com> | 2020-05-14 08:16:27 +0200 |
| commit | d3e5bae174d9d2ed115a364d5b404d179458a622 (patch) | |
| tree | 4bd42f68a9f4e25b5474abec76d2051be6f10613 /gcc/explow.h | |
| parent | f806a768e1400ec1115c3a52b1e207bb71b4ad45 (diff) | |
| download | gcc-d3e5bae174d9d2ed115a364d5b404d179458a622.zip gcc-d3e5bae174d9d2ed115a364d5b404d179458a622.tar.gz gcc-d3e5bae174d9d2ed115a364d5b404d179458a622.tar.bz2 | |
Make anti_adjust_stack_and_probe_stack_clash extern and use it for Z
When compiling with -mbackchain -fstack-clash-protection currently no
probes are emitted. This patch adjusts the "allocate_stack" expander
to call anti_adjust_stack_and_probe_stack_clash when needed. In order
to do this I had to export that function from explow.c.
Ok for mainline?
gcc/ChangeLog:
2020-05-14 Andreas Krebbel <krebbel@linux.ibm.com>
* config/s390/s390.md ("allocate_stack"): Call
anti_adjust_stack_and_probe_stack_clash when stack clash
protection is enabled.
* explow.c (anti_adjust_stack_and_probe_stack_clash): Remove
prototype. Remove static.
* explow.h (anti_adjust_stack_and_probe_stack_clash): Add
prototype.
gcc/testsuite/ChangeLog:
2020-05-14 Andreas Krebbel <krebbel@linux.ibm.com>
* gcc.target/s390/stack-clash-3.c: New test.
Diffstat (limited to 'gcc/explow.h')
| -rw-r--r-- | gcc/explow.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/explow.h b/gcc/explow.h index cc44bf8..0df8c62 100644 --- a/gcc/explow.h +++ b/gcc/explow.h @@ -69,6 +69,10 @@ extern void anti_adjust_stack (rtx); /* Add some bytes to the stack while probing it. An rtx says how many. */ extern void anti_adjust_stack_and_probe (rtx, bool); +/* Add some bytes to the stack while probing it. An rtx says how + many. Add additional probes to prevent stack clashing attacks. */ +extern void anti_adjust_stack_and_probe_stack_clash (rtx); + /* Support for building allocation/probing loops for stack-clash protection of dyamically allocated stack space. */ extern void compute_stack_clash_protection_loop_data (rtx *, rtx *, rtx *, |