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Wed, 26 Oct 2022 11:52:31 +0000 From: "Victor L. Do Nascimento" To: CC: Subject: [PATCH v4 7/8] newlib: libc: aeabi_memmove M-profile PACBTI-enablement In-Reply-To: (Victor L. 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Oct 2022 11:52:43.6557 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 06c30345-d19d-4d26-4e26-08dab74897b6 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM7EUR03FT054.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9480 X-Spam-Status: No, score=-13.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,FORGED_SPF_HELO,GIT_PATCH_0,KAM_DMARC_NONE,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE,TXREP,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: 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