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[cppgc][arm64][cfi] Add PAC/AUT instructions to PushAllRegistersAndIterateStack.

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Bug: v8:10026
Change-Id: Ie040d36d9a98943f97236998df53408bb060d028
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764760
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Cr-Commit-Position: refs/heads/master@{#73506}
This commit is contained in:
Georgia Kouveli 2021-03-17 10:40:21 +00:00 committed by Commit Bot
parent a3ba8ce36a
commit 8de57ed75f
1 changed files with 12 additions and 4 deletions
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16
src/heap/base/asm/arm64/push_registers_asm.cc
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@ -37,6 +37,10 @@ asm(
" stp x23, x24, [sp, #-16]! \n"
" stp x25, x26, [sp, #-16]! \n"
" stp x27, x28, [sp, #-16]! \n"
#ifdef V8_ENABLE_CONTROL_FLOW_INTEGRITY
// Sign return address.
" paciasp \n"
#endif
" stp fp, lr, [sp, #-16]! \n"
// Maintain frame pointer.
" mov fp, sp \n"
@ -47,8 +51,12 @@ asm(
// Pass 3rd parameter as sp (stack pointer).
" mov x2, sp \n"
" blr x7 \n"
// Load return address.
" ldr lr, [sp, #8] \n"
// Restore frame pointer and pop all callee-saved registers.
" ldr fp, [sp], #96 \n"
// Load return address and frame pointer.
" ldp fp, lr, [sp], #16 \n"
#ifdef V8_ENABLE_CONTROL_FLOW_INTEGRITY
// Authenticate return address.
" autiasp \n"
#endif
// Drop all callee-saved registers.
" add sp, sp, #80 \n"
" ret \n");