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| author | Richard Ball <richard.ball@arm.com> | 2024-04-25 15:30:42 +0100 |
|---|---|---|
| committer | Richard Ball <richard.ball@arm.com> | 2024-04-25 15:33:43 +0100 |
| commit | ad45086178d833254d66fab518b14234418f002b (patch) | |
| tree | 8eba129b5b6070d5afb06e61617e2ca447d3e8bd /libgcc | |
| parent | 070dd5c883ec2c0be542f448bd82d0f7f0ead390 (diff) | |
| download | gcc-ad45086178d833254d66fab518b14234418f002b.zip gcc-ad45086178d833254d66fab518b14234418f002b.tar.gz gcc-ad45086178d833254d66fab518b14234418f002b.tar.bz2 | |
arm: Zero/Sign extends for CMSE security
Co-Authored by: Andre Simoes Dias Vieira <Andre.SimoesDiasVieira@arm.com>
This patch makes the following changes:
1) When calling a secure function from non-secure code then any arguments
smaller than 32-bits that are passed in registers are zero- or sign-extended.
2) After a non-secure function returns into secure code then any return value
smaller than 32-bits that is passed in a register is zero- or sign-extended.
This patch addresses the following CVE-2024-0151.
gcc/ChangeLog:
PR target/114837
* config/arm/arm.cc (cmse_nonsecure_call_inline_register_clear):
Add zero/sign extend.
(arm_expand_prologue): Add zero/sign extend.
gcc/testsuite/ChangeLog:
* gcc.target/arm/cmse/extend-param.c: New test.
* gcc.target/arm/cmse/extend-return.c: New test.
Diffstat (limited to 'libgcc')
0 files changed, 0 insertions, 0 deletions