diff options
Diffstat (limited to 'test/ELF/arm-blx.s')
| -rw-r--r-- | test/ELF/arm-blx.s | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/test/ELF/arm-blx.s b/test/ELF/arm-blx.s new file mode 100644 index 000000000000..cccb1324fc8b --- /dev/null +++ b/test/ELF/arm-blx.s @@ -0,0 +1,113 @@ +// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t +// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %S/Inputs/far-arm-thumb-abs.s -o %tfar +// RUN: echo "SECTIONS { \ +// RUN: .callee1 : { *(.callee_low) } \ +// RUN: .callee2 : { *(.callee_arm_low) } \ +// RUN: .caller : { *(.text) } \ +// RUN: .callee3 : { *(.callee_high) } \ +// RUN: .callee4 : { *(.callee_arm_high) } } " > %t.script +// RUN: ld.lld --script %t.script %t %tfar -o %t2 2>&1 +// RUN: llvm-objdump -d -triple=armv7a-none-linux-gnueabi %t2 | FileCheck -check-prefix=CHECK-ARM %s +// RUN: llvm-objdump -d -triple=thumbv7a-none-linux-gnueabi %t2 | FileCheck -check-prefix=CHECK-THUMB %s +// REQUIRES: arm + +// Test BLX instruction is chosen for ARM BL/BLX instruction and Thumb callee +// Using two callees to ensure at least one has 2-byte alignment. + .syntax unified + .thumb + .section .callee_low, "ax",%progbits + .align 2 + .type callee_low,%function +callee_low: + bx lr + .type callee_low2, %function +callee_low2: + bx lr + + .section .callee_arm_low, "ax",%progbits + .arm + .balign 0x100 + .type callee_arm_low,%function + .align 2 +callee_arm_low: + bx lr + +.section .text, "ax",%progbits + .arm + .globl _start + .balign 0x10000 + .type _start,%function +_start: + bl callee_low + blx callee_low + bl callee_low2 + blx callee_low2 + bl callee_high + blx callee_high + bl callee_high2 + blx callee_high2 + bl blx_far + blx blx_far2 +// blx to ARM instruction should be written as a BL + bl callee_arm_low + blx callee_arm_low + bl callee_arm_high + blx callee_arm_high + bx lr + + .section .callee_high, "ax",%progbits + .balign 0x100 + .thumb + .type callee_high,%function +callee_high: + bx lr + .type callee_high2,%function +callee_high2: + bx lr + + .section .callee_arm_high, "ax",%progbits + .arm + .balign 0x100 + .type callee_arm_high,%function +callee_arm_high: + bx lr + +// CHECK-THUMB: Disassembly of section .callee1: +// CHECK-THUMB-NEXT: callee_low: +// CHECK-THUMB-NEXT: b4: 70 47 bx lr +// CHECK-THUMB: callee_low2: +// CHECK-THUMB-NEXT: b6: 70 47 bx lr + +// CHECK-ARM: Disassembly of section .callee2: +// CHECK-ARM-NEXT: callee_arm_low: +// CHECK-ARM-NEXT: 100: 1e ff 2f e1 bx lr + +// CHECK-ARM: Disassembly of section .caller: +// CHECK-ARM-NEXT: _start: +// CHECK-ARM-NEXT: 10000: 2b c0 ff fa blx #-65364 <callee_low> +// CHECK-ARM-NEXT: 10004: 2a c0 ff fa blx #-65368 <callee_low> +// CHECK-ARM-NEXT: 10008: 29 c0 ff fb blx #-65370 <callee_low2> +// CHECK-ARM-NEXT: 1000c: 28 c0 ff fb blx #-65374 <callee_low2> +// CHECK-ARM-NEXT: 10010: 3a 00 00 fa blx #232 <callee_high> +// CHECK-ARM-NEXT: 10014: 39 00 00 fa blx #228 <callee_high> +// CHECK-ARM-NEXT: 10018: 38 00 00 fb blx #226 <callee_high2> +// CHECK-ARM-NEXT: 1001c: 37 00 00 fb blx #222 <callee_high2> +// 10020 + 1FFFFFC + 8 = 0x2010024 = blx_far +// CHECK-ARM-NEXT: 10020: ff ff 7f fa blx #33554428 +// 10024 + 1FFFFFC + 8 = 0x2010028 = blx_far2 +// CHECK-ARM-NEXT: 10024: ff ff 7f fa blx #33554428 +// CHECK-ARM-NEXT: 10028: 34 c0 ff eb bl #-65328 <callee_arm_low> +// CHECK-ARM-NEXT: 1002c: 33 c0 ff eb bl #-65332 <callee_arm_low> +// CHECK-ARM-NEXT: 10030: 72 00 00 eb bl #456 <callee_arm_high> +// CHECK-ARM-NEXT: 10034: 71 00 00 eb bl #452 <callee_arm_high> +// CHECK-ARM-NEXT: 10038: 1e ff 2f e1 bx lr + +// CHECK-THUMB: Disassembly of section .callee3: +// CHECK-THUMB: callee_high: +// CHECK-THUMB-NEXT: 10100: 70 47 bx lr +// CHECK-THUMB: callee_high2: +// CHECK-THUMB-NEXT: 10102: 70 47 bx lr + +// CHECK-ARM: Disassembly of section .callee4: +// CHECK-NEXT-ARM: callee_arm_high: +// CHECK-NEXT-ARM: 10200: 1e ff 2f e1 bx lr |