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llvm-project/lld/test/ELF/arm-thumb-thunk-symbols.s

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[ELF] Move `// REQUIRES:` line to the top llvm-svn: 335676
2018-06-27 06:20:04 +08:00
// REQUIRES: arm
[ELF] Be more precise about Thumb state bit in ARM thunks The symbols generated for Thunks have type STT_FUNC, to permit a thunk to be reused via a blx instruction the Thumb bit (0) needs to be set properly. Differential Revision: https://reviews.llvm.org/D34036 llvm-svn: 305065
2017-06-09 17:51:51 +08:00
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t
// RUN: ld.lld %t -o %t2 2>&1
// RUN: llvm-readobj --symbols %t2 | FileCheck %s
// RUN: ld.lld --shared %t -o %t3 2>&1
// RUN: llvm-readobj --symbols %t3 | FileCheck -check-prefix=CHECK-PI %s
// Check that the symbols generated for Thunks have the correct symbol type
// of STT_FUNC and the correct value of bit 0 (0 for ARM 1 for Thumb)
.syntax unified
.section .text.thumb, "ax", %progbits
.thumb
.balign 0x1000
.globl thumb_fn
.type thumb_fn, %function
thumb_fn:
b.w arm_fn
.section .text.arm, "ax", %progbits
.arm
.balign 0x1000
.globl arm_fn
.type arm_fn, %function
arm_fn:
b thumb_fn
// CHECK: Name: __Thumbv7ABSLongThunk_arm_fn
[ELF] Pre-create ThunkSections at Target specific intervals When an OutputSection is larger than the branch range for a Target we need to place thunks such that they are always in range of their caller, and sufficiently spaced to maximise the number of callers that can use the thunk. We use the simple heuristic of placing the ThunkSection at intervals corresponding to a target specific branch range. If the OutputSection is small we put the thunks at the end of the executable sections. Differential Revision: https://reviews.llvm.org/D34689 llvm-svn: 316751
2017-10-27 16:58:28 +08:00
// CHECK-NEXT: Value: 0x12005
[ELF] Be more precise about Thumb state bit in ARM thunks The symbols generated for Thunks have type STT_FUNC, to permit a thunk to be reused via a blx instruction the Thumb bit (0) needs to be set properly. Differential Revision: https://reviews.llvm.org/D34036 llvm-svn: 305065
2017-06-09 17:51:51 +08:00
// CHECK-NEXT: Size: 10
// CHECK-NEXT: Binding: Local (0x0)
// CHECK-NEXT: Type: Function (0x2)
// CHECK: Name: __ARMv7ABSLongThunk_thumb_fn
[ELF] Pre-create ThunkSections at Target specific intervals When an OutputSection is larger than the branch range for a Target we need to place thunks such that they are always in range of their caller, and sufficiently spaced to maximise the number of callers that can use the thunk. We use the simple heuristic of placing the ThunkSection at intervals corresponding to a target specific branch range. If the OutputSection is small we put the thunks at the end of the executable sections. Differential Revision: https://reviews.llvm.org/D34689 llvm-svn: 316751
2017-10-27 16:58:28 +08:00
// CHECK-NEXT: Value: 0x12010
[ELF] Be more precise about Thumb state bit in ARM thunks The symbols generated for Thunks have type STT_FUNC, to permit a thunk to be reused via a blx instruction the Thumb bit (0) needs to be set properly. Differential Revision: https://reviews.llvm.org/D34036 llvm-svn: 305065
2017-06-09 17:51:51 +08:00
// CHECK-NEXT: Size: 12
// CHECK-NEXT: Binding: Local (0x0)
// CHECK-NEXT: Type: Function (0x2)
// CHECK-PI: Name: __ThumbV7PILongThunk_arm_fn
[ELF] Pre-create ThunkSections at Target specific intervals When an OutputSection is larger than the branch range for a Target we need to place thunks such that they are always in range of their caller, and sufficiently spaced to maximise the number of callers that can use the thunk. We use the simple heuristic of placing the ThunkSection at intervals corresponding to a target specific branch range. If the OutputSection is small we put the thunks at the end of the executable sections. Differential Revision: https://reviews.llvm.org/D34689 llvm-svn: 316751
2017-10-27 16:58:28 +08:00
// CHECK-PI-NEXT: Value: 0x2005
[ELF] Be more precise about Thumb state bit in ARM thunks The symbols generated for Thunks have type STT_FUNC, to permit a thunk to be reused via a blx instruction the Thumb bit (0) needs to be set properly. Differential Revision: https://reviews.llvm.org/D34036 llvm-svn: 305065
2017-06-09 17:51:51 +08:00
// CHECK-PI-NEXT: Size: 12
// CHECK-PI-NEXT: Binding: Local (0x0)
// CHECK-PI-NEXT: Type: Function (0x2)