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| -rw-r--r-- | md/writeup/using_gdb.md | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/md/writeup/using_gdb.md b/md/writeup/using_gdb.md index 3346e41..5a91a48 100644 --- a/md/writeup/using_gdb.md +++ b/md/writeup/using_gdb.md @@ -87,6 +87,13 @@ print value in hex ``` +### ARM + +print value of memmory using register + +```bash +x/10x $sp +``` ## Print memory @@ -141,6 +148,30 @@ set print pretty on (gdb) next ``` +## Show source code +### Show current instruction +```bash +=> 0x801a0 <mbox_call+80>: ldr w1, [x2] +(gdb) x/i $pc +``` + +### Show n number of instructions + +```bash +(gdb) x/10i $pc +=> 0x801a0 <mbox_call+80>: ldr w1, [x2] + 0x801a4 <mbox_call+84>: tbnz w1, #30, 0x801a0 <mbox_call+80> + 0x801a8 <mbox_call+88>: ldr w1, [x3] + 0x801ac <mbox_call+92>: cmp w0, w1 + 0x801b0 <mbox_call+96>: b.ne 0x801a0 <mbox_call+80> // b.any + 0x801b4 <mbox_call+100>: ldp x19, x20, [sp, #16] + 0x801b8 <mbox_call+104>: ldp x29, x30, [sp], #32 + 0x801bc <mbox_call+108>: ret + 0x801c0 <pl011_init>: sub sp, sp, #0x10 + 0x801c4 <pl011_init+4>: mov w0, #0x3344 // #13124 +``` + + ### Links 1. [http://althing.cs.dartmouth.edu/secref/resources/plt-got.txt](http://althing.cs.dartmouth.edu/secref/resources/plt-got.txt) |