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Diffstat (limited to 'test/ELF/arm-exidx-order.s')
| -rw-r--r-- | test/ELF/arm-exidx-order.s | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/test/ELF/arm-exidx-order.s b/test/ELF/arm-exidx-order.s new file mode 100644 index 000000000000..951c71a4c33e --- /dev/null +++ b/test/ELF/arm-exidx-order.s @@ -0,0 +1,169 @@ +// 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/arm-exidx-cantunwind.s -o %tcantunwind +// RUN: ld.lld %t %tcantunwind -o %t2 2>&1 +// RUN: llvm-objdump -d -triple=armv7a-none-linux-gnueabi %t2 | FileCheck %s +// RUN: llvm-objdump -s -triple=armv7a-none-linux-gnueabi %t2 | FileCheck -check-prefix=CHECK-EXIDX %s +// RUN: llvm-readobj --program-headers --sections %t2 | FileCheck -check-prefix=CHECK-PT %s +// Use Linker script to place .ARM.exidx in between .text and orphan sections +// RUN: echo "SECTIONS { \ +// RUN: .text 0x11000 : { *(.text*) } \ +// RUN: .ARM.exidx : { *(.ARM.exidx) } } " > %t.script +// RUN: ld.lld --script %t.script %tcantunwind %t -o %t3 2>&1 +// RUN: llvm-objdump -d -triple=armv7a-none-linux-gnueabi %t3 | FileCheck -check-prefix=CHECK-SCRIPT %s +// RUN: llvm-objdump -s -triple=armv7a-none-linux-gnueabi %t3 | FileCheck -check-prefix=CHECK-SCRIPT-EXIDX %s +// REQUIRES: arm + +// Each assembler created .ARM.exidx section has the SHF_LINK_ORDER flag set +// with the sh_link containing the section index of the executable section +// containing the function it describes. The linker must combine the .ARM.exidx +// InputSections in the same order that it has combined the executable section, +// such that the combined .ARM.exidx OutputSection can be used as a binary +// search table. + + .syntax unified + .section .text, "ax",%progbits + .globl _start +_start: + .fnstart + bx lr + .cantunwind + .fnend + + .section .text.f1, "ax", %progbits + .globl f1 +f1: + .fnstart + bx lr + .cantunwind + .fnend + + .section .text.f2, "ax", %progbits + .globl f2 +f2: + .fnstart + bx lr + .cantunwind + .fnend + .globl f3 +f3: + .fnstart + bx lr + .cantunwind + .fnend + +// Check default no linker script order. + +// CHECK: Disassembly of section .text: +// CHECK: _start: +// CHECK-NEXT: 11000: 1e ff 2f e1 bx lr +// CHECK: f1: +// CHECK-NEXT: 11004: 1e ff 2f e1 bx lr +// CHECK: f2: +// CHECK-NEXT: 11008: 1e ff 2f e1 bx lr +// CHECK: f3: +// CHECK-NEXT: 1100c: 1e ff 2f e1 bx lr +// CHECK: func4: +// CHECK-NEXT: 11010: 1e ff 2f e1 bx lr +// CHECK: func5: +// CHECK-NEXT: 11014: 1e ff 2f e1 bx lr +// CHECK: Disassembly of section .func1: +// CHECK-NEXT: func1: +// CHECK-NEXT: 11018: 1e ff 2f e1 bx lr +// CHECK: Disassembly of section .func2: +// CHECK-NEXT: func2: +// CHECK-NEXT: 1101c: 1e ff 2f e1 bx lr +// CHECK: Disassembly of section .func3: +// CHECK-NEXT: func3: +// CHECK-NEXT: 11020: 1e ff 2f e1 bx lr + +// Each .ARM.exidx section has two 4 byte fields +// Field 1 is the 31-bit offset to the function. The top bit is used to +// indicate whether Field 2 is a pointer or an inline table entry. +// Field 2 is either a pointer to a .ARM.extab section or an inline table +// In this example all Field 2 entries are inline can't unwind (0x1) +// We expect to see the entries in the same order as the functions + +// CHECK-EXIDX: Contents of section .ARM.exidx: +// 100d4 + f2c = 11000 = _start +// 100dc + f28 = 11004 = f1 +// CHECK-EXIDX-NEXT: 100d4 2c0f0000 01000000 280f0000 01000000 +// 100e4 + f24 = 11008 = f2 +// 100ec + f20 = 1100c = f3 +// CHECK-EXIDX-NEXT: 100e4 240f0000 01000000 200f0000 01000000 +// 100f4 + f1c = 11010 = func4 +// 100fc + f18 = 11014 = func5 +// CHECK-EXIDX-NEXT: 100f4 1c0f0000 01000000 180f0000 01000000 +// 10104 + f14 = 11018 = func1 +// 1010c + f10 = 1101c = func2 +// CHECK-EXIDX-NEXT: 10104 140f0000 01000000 100f0000 01000000 +// 10114 + f0c = 11020 = func3 +// CHECK-EXIDX-NEXT: 10114 0c0f0000 01000000 + +// Check that PT_ARM_EXIDX program header has been generated that describes +// the .ARM.exidx output section +// CHECK-PT: Name: .ARM.exidx +// CHECK-PT-NEXT: Type: SHT_ARM_EXIDX (0x70000001) +// CHECK-PT-NEXT: Flags [ +// CHECK-PT-NEXT: SHF_ALLOC +// CHECK-PT-NEXT: SHF_LINK_ORDER +// CHECK-PT-NEXT: ] +// CHECK-PT-NEXT: Address: 0x100D4 +// CHECK-PT-NEXT: Offset: 0xD4 +// CHECK-PT-NEXT: Size: 80 + +// CHECK-PT: Type: PT_ARM_EXIDX (0x70000001) +// CHECK-PT-NEXT: Offset: 0xD4 +// CHECK-PT-NEXT: VirtualAddress: 0x100D4 +// CHECK-PT-NEXT: PhysicalAddress: 0x100D4 +// CHECK-PT-NEXT: FileSize: 80 +// CHECK-PT-NEXT: MemSize: 80 +// CHECK-PT-NEXT: Flags [ (0x4) +// CHECK-PT-NEXT: PF_R (0x4) +// CHECK-PT-NEXT: ] +// CHECK-PT-NEXT: Alignment: 4 +// CHECK-PT-NEXT: } + + +// Check linker script order. The .ARM.exidx section will be inserted after +// the .text section but before the orphan sections + +// CHECK-SCRIPT: Disassembly of section .text: +// CHECK-SCRIPT-NEXT: func4: +// CHECK-SCRIPT-NEXT: 11000: 1e ff 2f e1 bx lr +// CHECK-SCRIPT: func5: +// CHECK-SCRIPT-NEXT: 11004: 1e ff 2f e1 bx lr +// CHECK-SCRIPT: _start: +// CHECK-SCRIPT-NEXT: 11008: 1e ff 2f e1 bx lr +// CHECK-SCRIPT: f1: +// CHECK-SCRIPT-NEXT: 1100c: 1e ff 2f e1 bx lr +// CHECK-SCRIPT: f2: +// CHECK-SCRIPT-NEXT: 11010: 1e ff 2f e1 bx lr +// CHECK-SCRIPT: f3: +// CHECK-SCRIPT-NEXT: 11014: 1e ff 2f e1 bx lr +// CHECK-SCRIPT-NEXT: Disassembly of section .func1: +// CHECK-SCRIPT-NEXT: func1: +// CHECK-SCRIPT-NEXT: 11068: 1e ff 2f e1 bx lr +// CHECK-SCRIPT-NEXT: Disassembly of section .func2: +// CHECK-SCRIPT-NEXT: func2: +// CHECK-SCRIPT-NEXT: 1106c: 1e ff 2f e1 bx lr +// CHECK-SCRIPT-NEXT: Disassembly of section .func3: +// CHECK-SCRIPT-NEXT: func3: +// CHECK-SCRIPT-NEXT: 11070: 1e ff 2f e1 bx lr + +// Check that the .ARM.exidx section is sorted in order as the functions +// The offset in field 1, is 32-bit so in the binary the most significant bit +// 11018 - 18 = 11000 func4 +// 11020 - 1c = 11004 func5 +// CHECK-SCRIPT-EXIDX: 11018 e8ffff7f 01000000 e4ffff7f 01000000 +// 11028 - 20 = 11008 _start +// 11030 - 24 = 1100c f1 +// CHECK-SCRIPT-EXIDX-NEXT: 11028 e0ffff7f 01000000 dcffff7f 01000000 +// 11038 - 28 = 11010 f2 +// 11040 - 2c = 11014 f3 +// CHECK-SCRIPT-EXIDX-NEXT: 11038 d8ffff7f 01000000 d4ffff7f 01000000 +// 11048 + 20 = 11068 func1 +// 11050 + 1c = 1106c func2 +// CHECK-SCRIPT-EXIDX-NEXT: 11048 20000000 01000000 1c000000 01000000 +// 11058 + 18 = 11070 func3 +// 11060 + 14 = 11074 func3 + sizeof(func3) +// CHECK-SCRIPT-EXIDX-NEXT: 11058 18000000 01000000 14000000 01000000 |