derek.holloway
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113 lines
2.4 KiB
ArmAsm
113 lines
2.4 KiB
ArmAsm
// Test how BOLT handles indirect branch sequence of instructions in
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// AArch64MCPlus builder.
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// clang-format off
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// REQUIRES: system-linux, asserts
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// RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown -mattr=+pauth %s -o %t.o
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// RUN: %clang %cflags --target=aarch64-unknown-linux %t.o -o %t.exe -Wl,-q
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// RUN: llvm-bolt %t.exe -o %t.bolt --print-cfg --debug-only=mcplus -v=1 2>&1 \
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// RUN: | FileCheck %s
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// Pattern 1: there is no shift amount after the 'add' instruction.
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//
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// adr x6, 0x219fb0 <sigall_set+0x88>
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// add x6, x6, x14, lsl #2
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// ldr w7, [x6]
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// add x6, x6, w7, sxtw => no shift amount
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// br x6
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//
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// Pattern 2: nop/adr pair is used in place of adrp/add
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//
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// nop => nop/adr instead of adrp/add
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// adr x13, 0x215a18 <_nl_value_type_LC_COLLATE+0x50>
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// ldrh w13, [x13, w12, uxtw #1]
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// adr x12, 0x247b30 <__gettextparse+0x5b0>
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// add x13, x12, w13, sxth #2
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// br x13
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.section .text
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.align 4
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.globl _start
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.type _start, %function
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_start:
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bl test1
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bl test2
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// mov x0, #4
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// mov w8, #93
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// svc #0
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// Pattern 1
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// CHECK: BOLT-DEBUG: failed to match indirect branch: ShiftVAL != 2
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.globl test1
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.type test1, %function
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test1:
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mov x1, #0
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nop
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adr x3, datatable
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add x3, x3, x1, lsl #2
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ldr w2, [x3]
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add x3, x3, w2, sxtw
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br x3
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test1_0:
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ret
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test1_1:
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ret
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test1_2:
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ret
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.size test1, .-test1
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// Temporary workaround for PC-relative relocations from datatable leaking into
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// test2 function and creating phantom entry points.
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.skip 0x100
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// Pattern 2
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// CHECK: BOLT-DEBUG: failed to match indirect branch: nop/adr instead of adrp/add
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.globl test2
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.type test2, %function
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test2:
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nop
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adr x3, jump_table
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ldrh w3, [x3, x1, lsl #1]
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nop
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adr x1, test2_0
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add x3, x1, w3, sxth #2
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br x3
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test2_0:
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ret
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test2_1:
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ret
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// Make sure BOLT does not crash trying to disassemble BRA* instructions.
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.globl test_braa
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.type test_braa, %function
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test_braa:
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braa x0, x1
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.globl test_brab
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.type test_brab, %function
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test_brab:
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brab x0, x1
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.globl test_braaz
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.type test_braaz, %function
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test_braaz:
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braaz x0
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.globl test_brabz
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.type test_brabz, %function
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test_brabz:
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brabz x0
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.section .rodata,"a",@progbits
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datatable:
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.word test1_0-datatable
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.word test1_1-datatable
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.word test1_2-datatable
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jump_table:
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.hword (test2_0-test2_0)>>2
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.hword (test2_1-test2_0)>>2
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