derek.holloway
7502bf64a4
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60 lines
2.2 KiB
ArmAsm
60 lines
2.2 KiB
ArmAsm
// REQUIRES: arm
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// This test intentionally checks for fatal errors, and fatal errors aren't supported for testing when main is run twice.
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// XFAIL: main-run-twice
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// RUN: rm -rf %t && split-file %s %t
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6m-none-eabi %t/a.s -o %t/a.o
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// RUN: ld.lld --no-rosegment --script %t/a.t %t/a.o -o %t/a
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn -d %t/a --triple=armv6m-none-eabi | FileCheck %s
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// RUN: not ld.lld --no-rosegment --script %t/a.t %t/a.o -o %t/a2 --pie 2>&1 | FileCheck --check-prefix=CHECK-PI %s
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// RUN: rm -f %t/a %t/a2
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// Range extension thunks for Arm Architecture v6m. Only Thumb instructions
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// are permitted which limits the access to instructions that can access the
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// high registers (r8 - r15), this means that the thunks have to spill
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// low registers (r0 - r7) in order to perform the transfer of control.
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//--- a.t
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SECTIONS {
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.text_low 0x11345670 : { *(.text_low) }
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.text_high 0x12345678 : { *(.text_high) }
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}
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//--- a.s
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// The 'y' on the .section directive means that this section is eXecute Only code
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.syntax unified
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.section .text_low, "axy", %progbits
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.thumb
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.type _start, %function
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.balign 4
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.globl _start
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_start:
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bl far
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.section .text_high, "ax", %progbits
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.globl far
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.type far, %function
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far:
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bx lr
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// CHECK: Disassembly of section .text_low:
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// CHECK-EMPTY:
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// CHECK-NEXT: <_start>:
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// CHECK-NEXT: 11345670: bl 0x11345674 <__Thumbv6MABSXOLongThunk_far>
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// CHECK: <__Thumbv6MABSXOLongThunk_far>:
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// CHECK-NEXT: push {r0, r1}
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// CHECK-NEXT: movs r0, #18
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// CHECK-NEXT: lsls r0, r0, #8
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// CHECK-NEXT: adds r0, #52
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// CHECK-NEXT: lsls r0, r0, #8
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// CHECK-NEXT: adds r0, #86
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// CHECK-NEXT: lsls r0, r0, #8
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// CHECK-NEXT: adds r0, #121
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// CHECK-NEXT: str r0, [sp, #4]
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// CHECK-NEXT: pop {r0, pc}
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// CHECK: Disassembly of section .text_high:
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// CHECK-EMPTY:
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// CHECK-NEXT: <far>:
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// CHECK-NEXT: 12345678: bx lr
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// CHECK-PI: error: relocation R_ARM_THM_CALL to far not supported for Armv6-M targets for position independent and execute only code
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