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From: Richard Earnshaw <rearnsha@sourceware.org> To: newlib-cvs@sourceware.org Subject: [newlib-cygwin] newlib: libc: aeabi_memset M-profile PACBTI-enablement Date: Tue, 10 Jan 2023 16:49:50 +0000 (GMT) [thread overview] Message-ID: <20230110164950.28131385B51C@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=adc36ede1137a0c792e0281cef01e7750f866ac5 commit adc36ede1137a0c792e0281cef01e7750f866ac5 Author: Victor L. Do Nascimento <victor.donascimento@arm.com> Date: Wed Dec 21 11:28:01 2022 +0000 newlib: libc: aeabi_memset M-profile PACBTI-enablement Add function prologue/epilogue to conditionally add BTI landing pads and/or PAC code generation & authentication instructions depending on compilation flags. Diff: --- newlib/libc/machine/arm/aeabi_memset-thumb2.S | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/newlib/libc/machine/arm/aeabi_memset-thumb2.S b/newlib/libc/machine/arm/aeabi_memset-thumb2.S index eaca1d8d7..6b77d3820 100644 --- a/newlib/libc/machine/arm/aeabi_memset-thumb2.S +++ b/newlib/libc/machine/arm/aeabi_memset-thumb2.S @@ -26,14 +26,18 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +#include "arm_asm.h" + .thumb .syntax unified .global __aeabi_memset .type __aeabi_memset, %function + .fnstart + .cfi_startproc ASM_ALIAS __aeabi_memset4 __aeabi_memset ASM_ALIAS __aeabi_memset8 __aeabi_memset __aeabi_memset: - push {r4, r5, r6} + prologue 4 6 lsls r4, r0, #30 beq 10f subs r4, r1, #1 @@ -98,10 +102,14 @@ __aeabi_memset: cmp r3, r4 bne 8b 9: - pop {r4, r5, r6} - bx lr + .cfi_remember_state + epilogue 4 6 10: + .cfi_restore_state mov r4, r1 mov r3, r0 b 3b + .cfi_endproc + .cantunwind + .fnend .size __aeabi_memset, . - __aeabi_memset
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