derek.holloway
7502bf64a4
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55 lines
1.6 KiB
ArmAsm
55 lines
1.6 KiB
ArmAsm
# Checking that we generate an OpNegateRAState CFI after the split point,
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# when splitting a region with signed RA state.
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# We split at the fallthrough label.
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# REQUIRES: system-linux
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# RUN: %clang %s %cflags -march=armv8.3-a -Wl,-q -o %t
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# RUN: link_fdata --no-lbr %s %t %t.fdata
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# RUN: llvm-bolt %t -o %t.bolt --data %t.fdata -split-functions \
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# RUN: --print-only foo --print-split --print-all 2>&1 | FileCheck %s
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# Checking that we don't see any OpNegateRAState CFIs before the insertion pass.
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# CHECK-NOT: OpNegateRAState
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# CHECK: Binary Function "foo" after pointer-auth-cfi-fixup
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# CHECK: paciasp
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# CHECK-NEXT: OpNegateRAState
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# CHECK: ------- HOT-COLD SPLIT POINT -------
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# CHECK: OpNegateRAState
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# CHECK-NEXT: mov x0, #0x1
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# CHECK-NEXT: autiasp
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# CHECK-NEXT: OpNegateRAState
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# CHECK-NEXT: ret
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# End of the pointer-auth-cfi-fixup logs
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# CHECK: Binary Function "foo" after finalize-functions
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.text
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.globl foo
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.type foo, %function
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foo:
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.cfi_startproc
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.entry_bb:
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# FDATA: 1 foo #.entry_bb# 10
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paciasp
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.cfi_negate_ra_state // indicating that paciasp changed the RA state to signed
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cmp x0, #0
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b.eq .Lcold_bb1
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.Lfallthrough: // split point
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mov x0, #1
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autiasp
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.cfi_negate_ra_state // indicating that autiasp changed the RA state to unsigned
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ret
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.Lcold_bb1: // Instructions below are not important, they are just here so the cold block is not empty.
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.cfi_negate_ra_state // ret has unsigned RA state, but the next inst (autiasp) has signed RA state
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mov x0, #2
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retaa
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.cfi_endproc
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.size foo, .-foo
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## Force relocation mode.
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.reloc 0, R_AARCH64_NONE
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