151 lines
4.3 KiB
Plaintext
151 lines
4.3 KiB
Plaintext
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# RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu \
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# RUN: -start-before aarch64-sls-hardening -o - %s \
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# RUN: -mattr=harden-sls-retbr \
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# RUN: | FileCheck %s --check-prefixes=CHECK,ISBDSB
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# RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu \
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# RUN: -start-before aarch64-sls-hardening -o - %s \
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# RUN: -mattr=harden-sls-retbr -mattr=+sb \
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# RUN: | FileCheck %s --check-prefixes=CHECK,SB
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# Check that the SLS hardening pass also protects BRA* indirect branches that
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# llvm currently does not generate.
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--- |
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@ptr_aa = private unnamed_addr constant [2 x i8*] [i8* blockaddress(@br_aa, %return), i8* blockaddress(@br_aa, %l2)], align 8
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@ptr_aaz = private unnamed_addr constant [2 x i8*] [i8* blockaddress(@br_aaz, %return), i8* blockaddress(@br_aaz, %l2)], align 8
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@ptr_ab = private unnamed_addr constant [2 x i8*] [i8* blockaddress(@br_ab, %return), i8* blockaddress(@br_ab, %l2)], align 8
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@ptr_abz = private unnamed_addr constant [2 x i8*] [i8* blockaddress(@br_abz, %return), i8* blockaddress(@br_abz, %l2)], align 8
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define dso_local i32 @br_aa(i32 %a, i32 %b, i32 %i) {
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entry:
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br label %l2
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l2:
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br label %return
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return:
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ret i32 undef
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}
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define dso_local i32 @br_aaz(i32 %a, i32 %b, i32 %i) {
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entry:
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br label %l2
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l2:
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br label %return
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return:
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ret i32 undef
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}
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define dso_local i32 @br_ab(i32 %a, i32 %b, i32 %i) {
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entry:
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br label %l2
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l2:
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br label %return
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return:
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ret i32 undef
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}
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define dso_local i32 @br_abz(i32 %a, i32 %b, i32 %i) {
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entry:
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br label %l2
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l2:
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br label %return
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return:
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ret i32 undef
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}
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...
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---
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name: br_aa
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: br_aa:
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bb.0.entry:
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successors: %bb.2, %bb.1
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liveins: $w2
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$x8 = ADRP target-flags(aarch64-page) @ptr_aa
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renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_aa, 0
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renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
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BRAA killed renamable $x8, $sp
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; CHECK: braa x8, sp
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; ISBDSB-NEXT: dsb sy
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; ISBDSB-NEXT: isb
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; SB-NEXT: {{ sb$}}
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bb.1.l2 (address-taken):
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renamable $w0 = MOVZWi 1, 0
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RET undef $lr, implicit $w0
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bb.2.return (address-taken):
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$w0 = ORRWrs $wzr, $wzr, 0
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RET undef $lr, implicit $w0
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...
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---
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name: br_aaz
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: br_aaz:
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bb.0.entry:
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successors: %bb.2, %bb.1
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liveins: $w2
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$x8 = ADRP target-flags(aarch64-page) @ptr_aaz
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renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_aaz, 0
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renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
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BRAAZ killed renamable $x8
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; CHECK: braaz x8
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; ISBDSB-NEXT: dsb sy
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; ISBDSB-NEXT: isb
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; SB-NEXT: {{ sb$}}
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bb.1.l2 (address-taken):
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renamable $w0 = MOVZWi 1, 0
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RET undef $lr, implicit $w0
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bb.2.return (address-taken):
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$w0 = ORRWrs $wzr, $wzr, 0
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RET undef $lr, implicit $w0
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...
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---
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name: br_ab
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: br_ab:
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bb.0.entry:
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successors: %bb.2, %bb.1
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liveins: $w2
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$x8 = ADRP target-flags(aarch64-page) @ptr_ab
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renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_ab, 0
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renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
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BRAA killed renamable $x8, $sp
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; CHECK: braa x8, sp
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; ISBDSB-NEXT: dsb sy
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; ISBDSB-NEXT: isb
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; SB-NEXT: {{ sb$}}
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bb.1.l2 (address-taken):
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renamable $w0 = MOVZWi 1, 0
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RET undef $lr, implicit $w0
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bb.2.return (address-taken):
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$w0 = ORRWrs $wzr, $wzr, 0
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RET undef $lr, implicit $w0
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...
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---
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name: br_abz
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: br_abz:
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bb.0.entry:
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successors: %bb.2, %bb.1
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liveins: $w2
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$x8 = ADRP target-flags(aarch64-page) @ptr_abz
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renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_abz, 0
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renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
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BRAAZ killed renamable $x8
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; CHECK: braaz x8
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; ISBDSB-NEXT: dsb sy
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; ISBDSB-NEXT: isb
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; SB-NEXT: {{ sb$}}
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bb.1.l2 (address-taken):
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renamable $w0 = MOVZWi 1, 0
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RET undef $lr, implicit $w0
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bb.2.return (address-taken):
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$w0 = ORRWrs $wzr, $wzr, 0
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RET undef $lr, implicit $w0
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...
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