18c5ad5c6c
Continuing the theme from #116777 and #124931, this patch ensures we compute the correct address when a functions is spread across multiple sections. Due to this, it's not sufficient to adjust the offset in the section+offset pair (Address::Slide). We must actually slide the file offset and then recompute the section using the result. I found this out due to a failure to disassemble some parts of the function, so I'm testing with that, although it's likely there are other things that were broken due to this.
111 lines
4.5 KiB
ArmAsm
111 lines
4.5 KiB
ArmAsm
## Test disassembling of functions which are spread over multiple sections (ELF
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## segments are modelled as LLDB sections).
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# REQUIRES: x86, lld
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# RUN: split-file %s %t
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# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux %t/file.s -o %t/file.o
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# RUN: ld.lld %t/file.o -o %t/file.out -T %t/file.lds
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# RUN: %lldb %t/file.out -o "disassemble --name func1" -o exit | FileCheck %s
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# CHECK: (lldb) disassemble --name func1
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# CHECK: file.out`func1:
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# CHECK-NEXT: file.out[0x0] <+0>: int $0x2a
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# CHECK: file.out`func1:
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# CHECK-NEXT: file.out[0x1000] <+4096>: int $0x2f
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#--- file.lds
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## Linker script placing the parts of the section into different segments
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## (typically one of these would be for the "hot" code).
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PHDRS {
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text1 PT_LOAD;
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text2 PT_LOAD;
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}
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SECTIONS {
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. = 0;
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.text.part1 : { *(.text.part1) } :text1
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.text.part2 : { *(.text.part2) } :text2
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}
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#--- file.s
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## A very simple function consisting of two parts and DWARF describing the
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## function.
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.section .text.part1,"ax",@progbits
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.p2align 12
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func1:
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int $42
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.Lfunc1_end:
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.section .text.part2,"ax",@progbits
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.p2align 12
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func1.__part.1:
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int $47
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.Lfunc1.__part.1_end:
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 37 # DW_AT_producer
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.byte 8 # DW_FORM_string
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.byte 19 # DW_AT_language
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.byte 5 # DW_FORM_data2
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 85 # DW_AT_ranges
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.byte 23 # DW_FORM_sec_offset
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 2 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 0 # DW_CHILDREN_no
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.byte 85 # DW_AT_ranges
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.byte 23 # DW_FORM_sec_offset
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_info,"",@progbits
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.Lcu_begin0:
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.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
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.Ldebug_info_start0:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbrev DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.short 29 # DW_AT_language
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.quad 0 # DW_AT_low_pc
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.long .Ldebug_ranges0 # DW_AT_ranges
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.byte 2 # Abbrev DW_TAG_subprogram
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.long .Ldebug_ranges0 # DW_AT_ranges
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.asciz "func1" # DW_AT_name
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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.section .debug_rnglists,"",@progbits
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.long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length
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.Ldebug_list_header_start0:
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.short 5 # Version
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.long 1 # Offset entry count
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.Lrnglists_table_base0:
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.long .Ldebug_ranges0-.Lrnglists_table_base0
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.Ldebug_ranges0:
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.byte 6 # DW_RLE_start_end
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.quad func1
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.quad .Lfunc1_end
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.byte 6 # DW_RLE_start_end
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.quad func1.__part.1
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.quad .Lfunc1.__part.1_end
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.byte 0 # DW_RLE_end_of_list
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.Ldebug_list_header_end0:
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