// REQUIRES: x86 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o // RUN: ld.lld %t.o -o %t // RUN: llvm-readobj --file-headers -S --section-data -l --symbols %t \ // RUN: | FileCheck %s --check-prefix=NOHDR // RUN: ld.lld -eh-frame-hdr -no-eh-frame-hdr %t.o -o %t // RUN: llvm-readobj --file-headers -S --section-data -l --symbols %t \ // RUN: | FileCheck %s --check-prefix=NOHDR // RUN: ld.lld --eh-frame-hdr %t.o -o %t // RUN: llvm-readobj --file-headers -S --section-data -l --symbols %t \ // RUN: | FileCheck %s --check-prefix=HDR // RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=HDRDISASM .section foo,"ax",@progbits .cfi_startproc nop .cfi_endproc .section bar,"ax",@progbits .cfi_startproc nop .cfi_endproc .section dah,"ax",@progbits .cfi_startproc nop .cfi_endproc .text .globl _start _start: // NOHDR: Sections [ // NOHDR-NOT: Name: .eh_frame_hdr // NOHDR: ProgramHeaders [ // NOHDR-NOT: PT_GNU_EH_FRAME // HDRDISASM: Disassembly of section foo: // HDRDISASM-EMPTY: // HDRDISASM-NEXT: : // HDRDISASM-NEXT: 2011e4: 90 nop // HDRDISASM-EMPTY: // HDRDISASM-NEXT: Disassembly of section bar: // HDRDISASM-EMPTY: // HDRDISASM-NEXT: : // HDRDISASM-NEXT: 2011e5: 90 nop // HDRDISASM-EMPTY: // HDRDISASM-NEXT: Disassembly of section dah: // HDRDISASM-EMPTY: // HDRDISASM-NEXT: : // HDRDISASM-NEXT: 2011e6: 90 nop // HDR: Section { // HDR: Index: // HDR: Name: .eh_frame_hdr // HDR-NEXT: Type: SHT_PROGBITS // HDR-NEXT: Flags [ // HDR-NEXT: SHF_ALLOC // HDR-NEXT: ] // HDR-NEXT: Address: 0x200158 // HDR-NEXT: Offset: 0x158 // HDR-NEXT: Size: 36 // HDR-NEXT: Link: 0 // HDR-NEXT: Info: 0 // HDR-NEXT: AddressAlignment: 4 // HDR-NEXT: EntrySize: 0 // HDR-NEXT: SectionData ( // HDR-NEXT: 0000: 011B033B 24000000 03000000 8C100000 // HDR-NEXT: 0010: 40000000 8D100000 58000000 8E100000 // HDR-NEXT: 0020: 70000000 // HDR-NEXT: ) // Header (always 4 bytes): 0x011B033B // 24000000 = .eh_frame(0x200180) - .eh_frame_hdr(0x200158) - 4 // 03000000 = 3 = the number of FDE pointers in the table. // Entry(1): 8C100000 40000000 // 480E0000 = 0x2011e4 - .eh_frame_hdr(0x200158) = 0x108C // 40000000 = address of FDE(1) - .eh_frame_hdr(0x200158) = // = .eh_frame(0x200180) + 24 - 0x200158 = 0x40 // Entry(2): 8D100000 58000000 // A90E0000 = 0x2011e5 - .eh_frame_hdr(0x200158) = 0x108D // 58000000 = address of FDE(2) - .eh_frame_hdr(0x200158) = // = .eh_frame(0x200180) + 24 + 24 - 0x200158 = 0x58 // Entry(3): 8E100000 70000000 // AA0E0000 = 0x2011e6 - .eh_frame_hdr(0x200158) = 0x108E // 70000000 = address of FDE(3) - .eh_frame_hdr(0x200158) = // = .eh_frame(0x200180) + 24 + 24 + 24 - 0x200158 = 0x70 // HDR-NEXT: } // HDR-NEXT: Section { // HDR-NEXT: Index: // HDR-NEXT: Name: .eh_frame // HDR-NEXT: Type: SHT_PROGBITS // HDR-NEXT: Flags [ // HDR-NEXT: SHF_ALLOC // HDR-NEXT: ] // HDR-NEXT: Address: 0x200180 // HDR-NEXT: Offset: 0x180 // HDR-NEXT: Size: 100 // HDR-NEXT: Link: 0 // HDR-NEXT: Info: 0 // HDR-NEXT: AddressAlignment: 8 // HDR-NEXT: EntrySize: 0 // HDR-NEXT: SectionData ( // HDR-NEXT: 0000: 14000000 00000000 017A5200 01781001 // HDR-NEXT: 0010: 1B0C0708 90010000 14000000 1C000000 // HDR-NEXT: 0020: 44100000 01000000 00000000 00000000 // HDR-NEXT: 0030: 14000000 34000000 2D100000 01000000 // HDR-NEXT: 0040: 00000000 00000000 14000000 4C000000 // HDR-NEXT: 0050: 16100000 01000000 00000000 00000000 // HDR-NEXT: 0060: 00000000 // HDR-NEXT: ) // CIE: 14000000 00000000 017A5200 01781001 1B0C0708 90010000 // FDE(1): 14000000 1C000000 600E0000 01000000 00000000 00000000 // address of data (starts with 0x600E0000) = 0x200180 + 0x0020 = 0x2001A0 // The starting address to which this FDE applies = 0xE60 + 0x2001A0 = 0x201000 // The number of bytes after the start address to which this FDE applies = 0x01000000 = 1 // FDE(2): 14000000 34000000 490E0000 01000000 00000000 00000000 // address of data (starts with 0x490E0000) = 0x200180 + 0x0038 = 0x2001B8 // The starting address to which this FDE applies = 0xE49 + 0x2001B8 = 0x201001 // The number of bytes after the start address to which this FDE applies = 0x01000000 = 1 // FDE(3): 14000000 4C000000 320E0000 01000000 00000000 00000000 // address of data (starts with 0x320E0000) = 0x200180 + 0x0050 = 0x2001D0 // The starting address to which this FDE applies = 0xE5A + 0x2001D0 = 0x201002 // The number of bytes after the start address to which this FDE applies = 0x01000000 = 1 // HDR-NEXT: } // HDR: ProgramHeaders [ // HDR: ProgramHeader { // HDR: Type: PT_GNU_EH_FRAME // HDR-NEXT: Offset: 0x158 // HDR-NEXT: VirtualAddress: 0x200158 // HDR-NEXT: PhysicalAddress: 0x200158 // HDR-NEXT: FileSize: 36 // HDR-NEXT: MemSize: 36 // HDR-NEXT: Flags [ // HDR-NEXT: PF_R // HDR-NEXT: ] // HDR-NEXT: Alignment: 4 // HDR-NEXT: }