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| // REQUIRES: arm
// 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: . = 0xb4; \
// 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
// RUN: llvm-objdump -d -triple=armv7a-none-linux-gnueabi %t2 | FileCheck %s
// 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: Disassembly of section .callee1:
// CHECK-EMPTY:
// CHECK-NEXT: callee_low:
// CHECK-NEXT: b4: 70 47 bx lr
// CHECK: callee_low2:
// CHECK-NEXT: b6: 70 47 bx lr
// CHECK: Disassembly of section .callee2:
// CHECK-EMPTY:
// CHECK-NEXT: callee_arm_low:
// CHECK-NEXT: 100: 1e ff 2f e1 bx lr
// CHECK: Disassembly of section .caller:
// CHECK-EMPTY:
// CHECK-NEXT: _start:
// CHECK-NEXT: 10000: 2b c0 ff fa blx #-65364 <callee_low>
// CHECK-NEXT: 10004: 2a c0 ff fa blx #-65368 <callee_low>
// CHECK-NEXT: 10008: 29 c0 ff fb blx #-65370 <callee_low2>
// CHECK-NEXT: 1000c: 28 c0 ff fb blx #-65374 <callee_low2>
// CHECK-NEXT: 10010: 3a 00 00 fa blx #232 <callee_high>
// CHECK-NEXT: 10014: 39 00 00 fa blx #228 <callee_high>
// CHECK-NEXT: 10018: 38 00 00 fb blx #226 <callee_high2>
// CHECK-NEXT: 1001c: 37 00 00 fb blx #222 <callee_high2>
// 10020 + 1FFFFFC + 8 = 0x2010024 = blx_far
// CHECK-NEXT: 10020: ff ff 7f fa blx #33554428
// 10024 + 1FFFFFC + 8 = 0x2010028 = blx_far2
// CHECK-NEXT: 10024: ff ff 7f fa blx #33554428
// CHECK-NEXT: 10028: 34 c0 ff eb bl #-65328 <callee_arm_low>
// CHECK-NEXT: 1002c: 33 c0 ff eb bl #-65332 <callee_arm_low>
// CHECK-NEXT: 10030: 72 00 00 eb bl #456 <callee_arm_high>
// CHECK-NEXT: 10034: 71 00 00 eb bl #452 <callee_arm_high>
// CHECK-NEXT: 10038: 1e ff 2f e1 bx lr
// CHECK: Disassembly of section .callee3:
// CHECK-EMPTY:
// CHECK: callee_high:
// CHECK-NEXT: 10100: 70 47 bx lr
// CHECK: callee_high2:
// CHECK-NEXT: 10102: 70 47 bx lr
// CHECK: Disassembly of section .callee4:
// CHECK-EMPTY:
// CHECK-NEXT: callee_arm_high:
// CHECK-NEXT: 10200: 1e ff 2f e1 bx lr
|