How to print register values in GDB?

Question

How do I print the value of %eax and %ebp?

(gdb) p $eax
$1 = void

Answer 1

• If only want check it once, info registers show registers.
• If only want watch one register, for example, display $esp continue display esp registers in gdb command line.
• If want watch all registers, layout regs continue show registers, with TUI mode.