From 70631e160dcbaf6b43d33654d52ca96655509534 Mon Sep 17 00:00:00 2001
From: Johannes Stoelp <johannes.stoelp@gmail.com>
Date: Tue, 23 Jan 2024 00:41:11 +0100
Subject: objdump: disasm specific sym, visualize jumps

---
 src/binary/objdump.md | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

(limited to 'src/binary')

diff --git a/src/binary/objdump.md b/src/binary/objdump.md
index a76a327..6f17cb5 100644
--- a/src/binary/objdump.md
+++ b/src/binary/objdump.md
@@ -2,13 +2,15 @@
 
 ```markdown
   objdump [opts] <elf>
-    -M intel                use intil syntax
-    -d                      disassemble text section
-    -D                      disassemble all sections
-    -S                      mix disassembly with source code
-    -C                      demangle
-    -j <section>            display info for section
-    --[no-]show-raw-insn    [dont] show object code next to disassembly
+    -M intel                   use intil syntax
+    -d                         disassemble text section
+    -D                         disassemble all sections
+    --disassemble=<sym>        disassemble symbol <sym>
+    -S                         mix disassembly with source code
+    -C                         demangle
+    -j <section>               display info for section
+    --[no-]show-raw-insn       [dont] show object code next to disassembly
+    --visualize-jumps[=color]  visualize jumps with ascii art, optionally color arrows
 ```
 
 ## Disassemble section
@@ -54,3 +56,14 @@ objcopy -O binary --only-section .text test test-bin
 # Disassemble raw binary.
 objdump -D -b binary -m i386:x86-64 test-bin
 ```
+
+## Example: disassemble specific symbol
+```bash
+# Disassemble main().
+objdump --disassemble=main <bin>
+# Disassemble 'foo::bar()' (mangled).
+objdump --disassemble=_ZN3foo3barEvr <bin>
+
+# Disassemble 'foo::bar()' (demangled), requires -C
+objdump -C --disassemble=foo::bar <bin>
+```
-- 
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