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| author | Thomas Troeger <tstroege@gmx.de> | 2020-01-13 12:36:55 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2020-01-13 12:36:55 +0000 |
| commit | 1d67fe3b6e696fccb902d9919b9e58b7299a3205 (patch) | |
| tree | 84e284092b19da0c349671ccc287d8afd7c1c4b6 /binutils/NEWS | |
| parent | a4f2b7c5d931f2aa27851b59ae5817a6ee43cfcb (diff) | |
| download | gdb-1d67fe3b6e696fccb902d9919b9e58b7299a3205.zip gdb-1d67fe3b6e696fccb902d9919b9e58b7299a3205.tar.gz gdb-1d67fe3b6e696fccb902d9919b9e58b7299a3205.tar.bz2 | |
Add an option to objdump's disassembler to generate ascii art diagrams showing the destinations of flow control instructions.
binutils* objdump.c (visualize_jumps, color_output, extended_color_output)
(detected_jumps): New variables.
(usage): Add the new jump visualization options.
(option_values): Add new option value.
(long_options): Add the new option.
(jump_info_new, jump_info_free): New functions.
(jump_info_min_address, jump_info_max_address): Likewise.
(jump_info_end_address, jump_info_is_start_address): Likewise.
(jump_info_is_end_address, jump_info_size): Likewise.
(jump_info_unlink, jump_info_insert): Likewise.
(jump_info_add_front, jump_info_move_linked): Likewise.
(jump_info_intersect, jump_info_merge): Likewise.
(jump_info_sort, jump_info_visualize_address): Likewise.
(disassemble_jumps): New function - used to locate jumps.
(disassemble_bytes): Add ascii art generation.
(disassemble_section): Add scan to locate jumps.
(main): Parse the new visualization option.
* doc/binutils.texi: Document the new feature.
* NEWS: Mention the new feature.
opcodes * arm-dis.c (print_insn_arm): Fill in insn info fields for control
flow instructions.
(print_insn_thumb16, print_insn_thumb32): Likewise.
(print_insn): Initialize the insn info.
* i386-dis.c (print_insn): Initialize the insn info fields, and
detect jumps.
Diffstat (limited to 'binutils/NEWS')
| -rw-r--r-- | binutils/NEWS | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/binutils/NEWS b/binutils/NEWS index 72a9644..92ec6bc 100644 --- a/binutils/NEWS +++ b/binutils/NEWS @@ -15,6 +15,25 @@ * Add --keep-section option to objcopy and strip. This option keeps the specified section from being removed. + * Add visualization of jumps inside a function by drawing an ascii character + graph between the address and the disassembler column. Enabled via the + --visualize-jumps command line option for objdump. Currently supported by + the x86, x86_64, and ARM targets. The output looks something like this: + + c6: | | \----------> be 00 00 00 00 mov $0x0,%esi + cb: | | /----> 48 8b 3d 00 00 00 00 mov 0x0(%rip),%rdi # d2 <main+0xd2> + d2: | | | 31 c0 xor %eax,%eax + d4: | | | /-- e8 00 00 00 00 callq d9 <main+0xd9> + d9: | | | \-> bf 02 00 00 00 mov $0x2,%edi + de: | +-----------|----- e8 00 00 00 00 callq e3 <main+0xe3> + e3: | \-----------|----> 48 89 da mov %rbx,%rdx + e6: | | be 00 00 00 00 mov $0x0,%esi + eb: | \----- eb de jmp cb <main+0xcb> + ed: \-------------------> 48 8b 16 mov (%rsi),%rdx + + Additional arguments to the --visualize-jumps option add colors to the + output. + Changes in 2.33: * Add --source-comment[=<txt>] option to objdump which if present, |