From: "Victor L. Do Nascimento" <victor.donascimento@arm.com>
To: <newlib@sourceware.org>
Cc: <Richard.Earnshaw@arm.com>
Subject: [PATCH v4 7/8] newlib: libc: aeabi_memmove M-profile PACBTI-enablement
Date: Wed, 26 Oct 2022 12:52:31 +0100 [thread overview]
Message-ID: <yw8jh6zqkdj4.fsf@arm.com> (raw)
In-Reply-To: <yw8jbkpylste.fsf@arm.com> (Victor L. Do Nascimento's message of "Wed, 26 Oct 2022 12:37:01 +0100")
Add function prologue/epilogue to conditionally add BTI landing pads
and/or PAC code generation & authentication instructions depending on
compilation flags.
---
newlib/libc/machine/arm/aeabi_memmove-thumb2.S | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/newlib/libc/machine/arm/aeabi_memmove-thumb2.S b/newlib/libc/machine/arm/aeabi_memmove-thumb2.S
index e9504437b..20ca993e5 100644
--- a/newlib/libc/machine/arm/aeabi_memmove-thumb2.S
+++ b/newlib/libc/machine/arm/aeabi_memmove-thumb2.S
@@ -26,6 +26,8 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include "arm_asm.h"
+
.thumb
.syntax unified
.global __aeabi_memmove
@@ -33,8 +35,10 @@
ASM_ALIAS __aeabi_memmove4 __aeabi_memmove
ASM_ALIAS __aeabi_memmove8 __aeabi_memmove
__aeabi_memmove:
+ .fnstart
+ .cfi_startproc
+ prologue 4
cmp r0, r1
- push {r4}
bls 3f
adds r3, r1, r2
cmp r0, r3
@@ -48,9 +52,10 @@ __aeabi_memmove:
strb r4, [r1, #-1]!
bne 1b
2:
- pop {r4}
- bx lr
+ .cfi_remember_state
+ epilogue 4
3:
+ .cfi_restore_state
cmp r2, #0
beq 2b
add r2, r2, r1
@@ -60,6 +65,8 @@ __aeabi_memmove:
cmp r2, r1
strb r4, [r3, #1]!
bne 4b
- pop {r4}
- bx lr
+ epilogue 4
+ .cfi_endproc
+ .cantunwind
+ .fnend
.size __aeabi_memmove, . - __aeabi_memmove
--
2.36.1
next prev parent reply other threads:[~2022-10-26 11:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-26 11:37 [PATCH v4 0/8] Implement assembly cortex-M PACBTI functionality Victor L. Do Nascimento
2022-10-26 11:45 ` [PATCH v4 1/8] newlib: libc: define M-profile PACBTI-enablement macros Victor L. Do Nascimento
2022-11-22 15:04 ` Richard Earnshaw
2022-10-26 11:46 ` [PATCH v4 2/8] newlib: libc: strcmp M-profile PACBTI-enablement Victor L. Do Nascimento
2022-11-22 15:04 ` Richard Earnshaw
2022-10-26 11:47 ` [PATCH v4 3/8] newlib: libc: strlen " Victor L. Do Nascimento
2022-11-22 15:20 ` Richard Earnshaw
2022-10-26 11:49 ` [PATCH v4 4/8] newlib: libc: memchr " Victor L. Do Nascimento
2022-11-22 15:33 ` Richard Earnshaw
2022-10-26 11:50 ` [PATCH v4 5/8] newlib: libc: memcpy " Victor L. Do Nascimento
2022-11-22 16:03 ` Richard Earnshaw
2022-10-26 11:51 ` [PATCH v4 6/8] newlib: libc: setjmp/longjmp " Victor L. Do Nascimento
2022-11-22 16:17 ` Richard Earnshaw
2022-10-26 11:52 ` Victor L. Do Nascimento [this message]
2022-11-22 16:18 ` [PATCH v4 7/8] newlib: libc: aeabi_memmove " Richard Earnshaw
2022-10-26 11:53 ` [PATCH v4 8/8] newlib: libc: aeabi_memset " Victor L. Do Nascimento
2022-11-22 16:19 ` Richard Earnshaw
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