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* [PATCH v3 0/8] Implement assembly cortex-M PACBTI functionality
@ 2022-08-24 10:18 Victor L. Do Nascimento
  2022-08-24 10:27 ` [PATCH v3 1/8] newlib: libc: define M-profile PACBTI-enablement macros Victor L. Do Nascimento
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: Victor L. Do Nascimento @ 2022-08-24 10:18 UTC (permalink / raw)
  To: newlib; +Cc: Richard.Earnshaw

Hi all,

This patch series modifies hand-written assembly files for Arm targets,
conditionally enabling branch target identification as well as address
return signature and verification based on Armv8.1-M Pointer
Authentication [1] using ACLE feature test macros at compile-time [2].

The incorportaion of PACBTI functionality in function prologues/
epilogues is dictated by the arguments passed to the
`-mbranch-protection' flag at the time of Newlib compilation.

Regression tested on arm-none-eabi with and without MVE extension and
for Newlib and Newlib-nano.

[1]
<https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/armv8-1-m-pointer-authentication-and-branch-target-identification-extension>
[2] <https://developer.arm.com/documentation/101028/0012/5--Feature-test-macros>

Regards,
Victor

Victor Do Nascimento (8):
  newlib: libc: define M-profile PACBTI-enablement macros
  newlib: libc: strcmp M-profile PACBTI-enablement
  newlib: libc: strlen M-profile PACBTI-enablement
  newlib: libc: memchr M-profile PACBTI-enablement
  newlib: libc: memcpy M-profile PACBTI-enablement
  newlib: libc: setjmp/longjmp M-profile PACBTI-enablement
  newlib: libc: aeabi_memmove M-profile PACBTI-enablement
  newlib: libc: aeabi_memset M-profile PACBTI-enablement

 .../libc/machine/arm/aeabi_memmove-thumb2.S   |  15 +-
 newlib/libc/machine/arm/aeabi_memset-thumb2.S |  12 +-
 newlib/libc/machine/arm/arm_asm.h             | 130 ++++++++++++++++++
 newlib/libc/machine/arm/memchr.S              |  34 ++++-
 newlib/libc/machine/arm/memcpy-armv7m.S       |  35 +++--
 newlib/libc/machine/arm/setjmp.S              |  33 ++++-
 newlib/libc/machine/arm/strcmp-arm-tiny.S     |   8 +-
 newlib/libc/machine/arm/strcmp-armv7.S        |  42 ++++--
 newlib/libc/machine/arm/strcmp-armv7m.S       |  24 ++--
 newlib/libc/machine/arm/strlen-armv7.S        |  16 ++-
 newlib/libc/machine/arm/strlen-thumb2-Os.S    |  14 +-
 11 files changed, 301 insertions(+), 62 deletions(-)

-- 
2.36.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2022-08-24 10:41 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-08-24 10:18 [PATCH v3 0/8] Implement assembly cortex-M PACBTI functionality Victor L. Do Nascimento
2022-08-24 10:27 ` [PATCH v3 1/8] newlib: libc: define M-profile PACBTI-enablement macros Victor L. Do Nascimento
2022-08-24 10:30 ` [PATCH v3 2/8] newlib: libc: strcmp M-profile PACBTI-enablement Victor L. Do Nascimento
2022-08-24 10:33 ` [PATCH v3 3/8] newlib: libc: strlen " Victor L. Do Nascimento
2022-08-24 10:34 ` [PATCH v3 4/8] newlib: libc: memchr " Victor L. Do Nascimento
2022-08-24 10:36 ` [PATCH v3 5/8] newlib: libc: memcpy " Victor L. Do Nascimento
2022-08-24 10:38 ` [PATCH v3 6/8] newlib: libc: setjmp/longjmp " Victor L. Do Nascimento
2022-08-24 10:40 ` [PATCH v3 7/8] newlib: libc: aeabi_memmove " Victor L. Do Nascimento
2022-08-24 10:41 ` [PATCH v3 8/8] newlib: libc: aeabi_memset " Victor L. Do Nascimento

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