| // REQUIRES: arm |
| // RUN: llvm-mc --triple=thumbv7m-none-eabi --arm-add-build-attributes -filetype=obj -o %t.o %s |
| // RUN: echo "SECTIONS { \ |
| // RUN: .rodata.low 0x8012 : { *(.rodata.low) } \ |
| // RUN: .text.low 0x8f00 : { *(.text.low) } \ |
| // RUN: .text.neg 0x9000 : { *(.text.neg) } \ |
| // RUN: .text.pos 0x10000 : { *(.text.pos) } \ |
| // RUN: .text.high 0x10100 : { *(.text.high) } \ |
| // RUN: .data_high 0x1100f : { *(.data.high) } \ |
| // RUN: } " > %t.script |
| // RUN: ld.lld --script %t.script %t.o -o %t |
| // RUN: llvm-readobj --symbols %t | FileCheck %s --check-prefix=SYMS |
| // RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s |
| |
| /// Test the various legal cases for the R_ARM_THM_PC12 relocation |
| /// Interesting things to note |
| /// Range is +- 4095 bytes |
| /// The Thumb bit for function symbols is ignored |
| /// The expression is S + A - Pa where Pa is AlignDown(PC, 4) so we will use |
| /// 2-byte nops to make some of the ldr instructions 2-byte aligned. |
| .section .rodata.low, "a", %progbits |
| dat1: |
| .byte 0 |
| dat2: |
| .byte 1 |
| dat3: |
| .byte 2 |
| dat4: |
| .byte 3 |
| |
| .section .text.low, "ax", %progbits |
| .balign 4 |
| .global target1 |
| .type target1, %function |
| target1: |
| bx lr |
| .type target2, %function |
| target2: |
| bx lr |
| |
| .section .text.neg, "ax", %progbits |
| .balign 4 |
| .global _start |
| .thumb_func |
| _start: |
| nop |
| /// ldr r0, dat1 |
| .inst.w 0xf85f0004 |
| .reloc 2, R_ARM_THM_PC12, dat1 |
| /// ldr r1, dat2 |
| .inst.w 0xf85f1004 |
| .reloc 6, R_ARM_THM_PC12, dat2 |
| nop |
| /// ldr r2, dat3 |
| .inst.w 0xf85f2004 |
| .reloc 0xc, R_ARM_THM_PC12, dat3 |
| /// ldr r3, dat4 |
| .inst.w 0xf85f3004 |
| .reloc 0x10, R_ARM_THM_PC12, dat4 |
| |
| /// ldr r0, target1 |
| .inst.w 0xf85f0004 |
| .reloc 0x14, R_ARM_THM_PC12, target1 |
| |
| nop |
| /// ldr r1, target2 |
| .inst.w 0xf85f1004 |
| .reloc 0x1a, R_ARM_THM_PC12, target2 |
| |
| .section .text.pos, "ax", %progbits |
| .balign 4 |
| .global pos |
| .thumb_func |
| pos: |
| /// ldr r2, target3 |
| .inst.w 0xf85f2004 |
| .reloc 0, R_ARM_THM_PC12, target3 |
| nop |
| /// ldr r3, target4 |
| .inst.w 0xf85f3004 |
| .reloc 6, R_ARM_THM_PC12, target4 |
| nop |
| /// ldr r0, dat5 |
| .inst.w 0xf85f0004 |
| .reloc 0xc, R_ARM_THM_PC12, dat5 |
| /// ldr r1, dat6 |
| .inst.w 0xf85f1004 |
| .reloc 0x10, R_ARM_THM_PC12, dat6 |
| nop |
| /// ldr r2, dat7 |
| .inst.w 0xf85f2004 |
| .reloc 0x16, R_ARM_THM_PC12, dat7 |
| /// ldr r3, dat8 |
| .inst.w 0xf85f3004 |
| .reloc 0x1a, R_ARM_THM_PC12, dat8 |
| /// positive addend in instruction, all others are -4 (PC bias) |
| ///ldr.w r4, dat5 + 8 |
| .inst 0xf8df4004 |
| .reloc 0x1e, R_ARM_THM_PC12, dat5 |
| |
| .section .text.high, "ax", %progbits |
| .balign 4 |
| .thumb_func |
| .global target3 |
| target3: |
| bx lr |
| .thumb_func |
| target4: |
| bx lr |
| |
| .section .data.high, "aw", %progbits |
| dat5: |
| .byte 0 |
| dat6: |
| .byte 1 |
| dat7: |
| .byte 2 |
| dat8: |
| .byte 3 |
| |
| // SYMS: Name: dat1 |
| // SYMS-NEXT: Value: 0x8012 |
| // SYMS: Name: dat2 |
| // SYMS-NEXT: Value: 0x8013 |
| // SYMS: Name: dat3 |
| // SYMS-NEXT: Value: 0x8014 |
| // SYMS: Name: dat4 |
| // SYMS-NEXT: Value: 0x8015 |
| |
| // CHECK: 00008f00 <target1>: |
| // CHECK-NEXT: 8f00: bx lr |
| // CHECK: 00008f02 <target2>: |
| // CHECK-NEXT: 8f02: bx lr |
| |
| // CHECK: 00009000 <_start>: |
| // CHECK-NEXT: 9000: nop |
| /// AlignDown(0x9002+4, 4) - 0xff2 = 0x8012 |
| // CHECK-NEXT: 9002: ldr.w r0, [pc, #-4082] |
| /// AlignDown(0x9006+4, 4) - 0xff5 = 0x8013 |
| // CHECK-NEXT: 9006: ldr.w r1, [pc, #-4085] |
| // CHECK-NEXT: 900a: nop |
| /// AlignDown(0x900c+4, 4) - 0xffc = 0x8014 |
| // CHECK-NEXT: 900c: ldr.w r2, [pc, #-4092] |
| /// AlignDown(0x9010+4, 4) - 0xfff = 0x8015 |
| // CHECK-NEXT: 9010: ldr.w r3, [pc, #-4095] |
| /// AlignDown(0x9014+4, 4) - 0x118 = 0x8f00 |
| // CHECK-NEXT: 9014: ldr.w r0, [pc, #-280] |
| // CHECK-NEXT: 9018: nop |
| /// AlignDown(0x901a+4, 4) - 0x11a = 0x8f02 |
| // CHECK-NEXT: 901a: ldr.w r1, [pc, #-282] |
| |
| // CHECK: 00010000 <pos>: |
| /// AlignDown(0x10000+4, 4) + 0x1c = 0x10100 |
| // CHECK-NEXT: 10000: ldr.w r2, [pc, #252] |
| // CHECK-NEXT: 10004: nop |
| /// AlignDown(0x10006+4, 4) + 0x1a = 0x10122 |
| // CHECK-NEXT: 10006: ldr.w r3, [pc, #250] |
| // CHECK-NEXT: 1000a: nop |
| /// AlignDown(0x1000c+4, 4) + 0xfff = 0x1100f |
| // CHECK-NEXT: 1000c: ldr.w r0, [pc, #4095] |
| /// AlignDown(0x10010+4, 4) + 0xffc = 0x11010 |
| // CHECK-NEXT: 10010: ldr.w r1, [pc, #4092] |
| // CHECK-NEXT: 10014: nop |
| /// AlignDown(0x10016+4, 4) + 0xff9 = 0x11011 |
| // CHECK-NEXT: 10016: ldr.w r2, [pc, #4089] |
| /// AlignDown(0x1001a+4, 4) + 0xff6 = 0x11012 |
| // CHECK-NEXT: 1001a: ldr.w r3, [pc, #4086] |
| /// AlignDown(0x1001e+4, 4) + 0xff7 = 0x11017 = dat5 + 8 |
| // CHECK-NEXT: 1001e: ldr.w r4, [pc, #4087] |
| |
| // CHECK: 00010100 <target3>: |
| // CHECK-NEXT: 10100: bx lr |
| |
| // CHECK: 00010102 <target4>: |
| // CHECK-NEXT: 10102: bx lr |
| |
| // SYMS: Name: dat5 |
| // SYMS-NEXT: Value: 0x1100F |
| // SYMS: Name: dat6 |
| // SYMS-NEXT: Value: 0x11010 |
| // SYMS: Name: dat7 |
| // SYMS-NEXT: Value: 0x11011 |
| // SYMS: Name: dat8 |
| // SYMS-NEXT: Value: 0x11012 |
