Aborted (core dumped)

[borosilicate]

mjh@mjh-VirtualBox:~/hack$ gdb -q ./char_array2
Reading symbols from ./char_array2...
gdb-peda$ list
1 #include <stdio.h>
2 #include <string.h>
3
4 int main() {
5 char str_a[20];
6
7 strcpy(str_a, "Hello, world!\n");
8 printf(str_a);
9 }
gdb-peda$ break 6
Breakpoint 1 at 0x1184: file char_array2.c, line 7.
gdb-peda$ break strcpy
Function "strcpy" not defined.
gdb-peda$ i b
Num Type Disp Enb Address What
1 breakpoint keep y 0x0000000000001184 in main at char_array2.c:7
gdb-peda$ break 8
Breakpoint 2 at 0x11a6: file char_array2.c, line 8.
gdb-peda$ start
[----------------------------------registers-----------------------------------]
RAX: 0x555555555169 (

: endbr64)
RBX: 0x5555555551e0 (<__libc_csu_init>: endbr64)
RCX: 0x5555555551e0 (<__libc_csu_init>: endbr64)
RDX: 0x7fffffffe128 --> 0x7fffffffe440 ("SHELL=/bin/bash")
RSI: 0x7fffffffe118 --> 0x7fffffffe425 ("/home/mjh/hack/char_array2")
RDI: 0x1
RBP: 0x0
RSP: 0x7fffffffe028 --> 0x7ffff7de80b3 (<__libc_start_main+243>: mov edi,eax)
RIP: 0x555555555169 (: endbr64)
R8 : 0x0
R9 : 0x7ffff7fe0d50 (endbr64)
R10: 0x0
R11: 0x0
R12: 0x555555555080 (<_start>: endbr64)
R13: 0x7fffffffe110 --> 0x1
R14: 0x0
R15: 0x0
EFLAGS: 0x246 (carry PARITY adjust ZERO sign trap INTERRUPT direction overflow)
[-------------------------------------code-------------------------------------]
0x555555555159 <__do_global_dtors_aux+57>: nop DWORD PTR [rax+0x0]
0x555555555160 <frame_dummy>: endbr64
0x555555555164 <frame_dummy+4>: jmp 0x5555555550e0 <register_tm_clones>
=> 0x555555555169 : endbr64
0x55555555516d <main+4>: push rbp
0x55555555516e <main+5>: mov rbp,rsp
0x555555555171 <main+8>: sub rsp,0x20
0x555555555175 <main+12>: mov rax,QWORD PTR fs:0x28
[------------------------------------stack-------------------------------------]
0000| 0x7fffffffe028 --> 0x7ffff7de80b3 (<__libc_start_main+243>: mov edi,eax)
0008| 0x7fffffffe030 --> 0x7ffff7ffc620 --> 0x50d1300000000
0016| 0x7fffffffe038 --> 0x7fffffffe118 --> 0x7fffffffe425 ("/home/mjh/hack/char_array2")
0024| 0x7fffffffe040 --> 0x100000000
0032| 0x7fffffffe048 --> 0x555555555169 (: endbr64)
0040| 0x7fffffffe050 --> 0x5555555551e0 (<__libc_csu_init>: endbr64)
0048| 0x7fffffffe058 --> 0x4933ce13230737fe
0056| 0x7fffffffe060 --> 0x555555555080 (<_start>: endbr64)
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value

Temporary breakpoint 3, main () at char_array2.c:4
4 int main() {
gdb-peda$ break strcpy
Breakpoint 4 at gnu-indirect-function resolver at 0x7ffff7e63200
gdb-peda$ i b
Num Type Disp Enb Address What
1 breakpoint keep y 0x0000555555555184 in main at char_array2.c:7
2 breakpoint keep y 0x00005555555551a6 in main at char_array2.c:8
4 STT_GNU_IFUNC resolver keep y 0x00007ffff7e63200 <strcpy_ifunc>
gdb-peda$ step
[----------------------------------registers-----------------------------------]
RAX: 0x0
RBX: 0x5555555551e0 (<__libc_csu_init>: endbr64)
RCX: 0x5555555551e0 (<__libc_csu_init>: endbr64)
RDX: 0x7fffffffe128 --> 0x7fffffffe440 ("SHELL=/bin/bash")
RSI: 0x7fffffffe118 --> 0x7fffffffe425 ("/home/mjh/hack/char_array2")
RDI: 0x1
RBP: 0x7fffffffe020 --> 0x0
RSP: 0x7fffffffe000 --> 0x0
RIP: 0x555555555184 (<main+27>: lea rax,[rbp-0x20])
R8 : 0x0
R9 : 0x7ffff7fe0d50 (endbr64)
R10: 0x0
R11: 0x0
R12: 0x555555555080 (<_start>: endbr64)
R13: 0x7fffffffe110 --> 0x1
R14: 0x0
R15: 0x0
EFLAGS: 0x246 (carry PARITY adjust ZERO sign trap INTERRUPT direction overflow)
[-------------------------------------code-------------------------------------]
0x555555555175 <main+12>: mov rax,QWORD PTR fs:0x28
0x55555555517e <main+21>: mov QWORD PTR [rbp-0x8],rax
0x555555555182 <main+25>: xor eax,eax
=> 0x555555555184 <main+27>: lea rax,[rbp-0x20]
0x555555555188 <main+31>: movabs rdx,0x77202c6f6c6c6548
0x555555555192 <main+41>: mov QWORD PTR [rax],rdx
0x555555555195 <main+44>: mov DWORD PTR [rax+0x8],0x646c726f
0x55555555519c <main+51>: mov WORD PTR [rax+0xc],0xa21
[------------------------------------stack-------------------------------------]
0000| 0x7fffffffe000 --> 0x0
0008| 0x7fffffffe008 --> 0x555555555080 (<_start>: endbr64)
0016| 0x7fffffffe010 --> 0x7fffffffe110 --> 0x1
0024| 0x7fffffffe018 --> 0x96b67f34bb2caa00
0032| 0x7fffffffe020 --> 0x0
0040| 0x7fffffffe028 --> 0x7ffff7de80b3 (<__libc_start_main+243>: mov edi,eax)
0048| 0x7fffffffe030 --> 0x7ffff7ffc620 --> 0x50d1300000000
0056| 0x7fffffffe038 --> 0x7fffffffe118 --> 0x7fffffffe425 ("/home/mjh/hack/char_array2")
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value
Aborted (core dumped)
...Empty peda session file...
seems like a very simple task that is causing it to crash
... Normal gdb behavior for break strcpy is
(gdb) break strcpy
Function "strcpy" not defined.
Make breakpoint pending on future shared library load? (y or [n])
but peda will not do this...
mjh@mjh-VirtualBox:~/hack$ gdb -q ./char_array2
Reading symbols from ./char_array2...
gdb-peda$ break strcpy
Function "strcpy" not defined.
...It requires start command then it will allow breakpoint to be made at strcpy but then it crashes when continue used...