jer/xchg-rax-rax
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Jan-Erik Rediger 9d965de18e A list of (all? most?) x86 instructions
2023-09-15 11:59:25 +00:00
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0x00.asm some comment for 0x00 2023-09-15 11:58:36 +00:00
0x01.asm chapter 0x01 explained 2023-09-15 11:58:36 +00:00
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README.md A list of (all? most?) x86 instructions 2023-09-15 11:59:25 +00:00
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README.md

xchg rax, rax

So I got myself a hard copy of xchg rax, rax. Now I have to learn enough x86_64 assembler to read it. And probably also some gdb or lldb to inspect the running program.

I'll try to do that.

Build

Individual chapters are in their respective 0x??.asm files, probably with added comments. They can be build using make:

make 0x00

Resulting in a binary file 0x00

Debug

Break on main, inspect the registers, run the full thing and inspect it again.

gdb 0x00
(gdb) break main
(gdb) run
(gdb) info registers
rax            0x401110            4198672
rbx            0x7fffffffc968      140737488341352
rcx            0x403e00            4210176
rdx            0x7fffffffc978      140737488341368
rsi            0x7fffffffc968      140737488341352
rdi            0x1                 1
rbp            0x1                 0x1
-- snip --
(gdb) continue
Command Short Meaning
break main b main Set a breakpoint on the entry of function main
run r Run the program until a breakpoint or end
info registers i r Show values of all registers
continue c Continue running the program

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