Setting memory on gdb
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There're several tricks on gdb to setting memory.
gdb> set {int}0x0804201 = 1337
Above trick can only sets [1] fixed 4 byte of [2] non-ASCII value.
gdb> set {char[5]}0x0804201 = "AAAA"
Above trick can only sets [1] arbitrary length of [2] ASCII value.
...And 'x00' append at the end of memory location.
Question.
I'm finding command that can sets [1] arbitrary length of [2] non-ASCII value,
without null character append.
ex) setting memory location 0x0802412 to 0x909090909090 value.
Is there any command that I can use?
memory gdb command settings
asked Nov 20 at 7:03
Jiwon
159113
add a comment |
up vote
0
down vote
favorite
There're several tricks on gdb to setting memory.
gdb> set {int}0x0804201 = 1337
Above trick can only sets [1] fixed 4 byte of [2] non-ASCII value.
gdb> set {char[5]}0x0804201 = "AAAA"
Above trick can only sets [1] arbitrary length of [2] ASCII value.
...And 'x00' append at the end of memory location.
Question.
I'm finding command that can sets [1] arbitrary length of [2] non-ASCII value,
without null character append.
ex) setting memory location 0x0802412 to 0x909090909090 value.
Is there any command that I can use?
memory gdb command settings
asked Nov 20 at 7:03
Jiwon
159113
0x909090909090is a long constant that can also be written0x0000909090909090. I think what you really want is to write 6 bytes of 0x90 and not 6 bytes of 0x90 followed by 2 bytes of 0x00, correct? If so, tryset {char[6]} 0x0802412 = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90}
– Mark Plotnick
Nov 20 at 15:17
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
There're several tricks on gdb to setting memory.
gdb> set {int}0x0804201 = 1337
Above trick can only sets [1] fixed 4 byte of [2] non-ASCII value.
gdb> set {char[5]}0x0804201 = "AAAA"
Above trick can only sets [1] arbitrary length of [2] ASCII value.
...And 'x00' append at the end of memory location.
Question.
I'm finding command that can sets [1] arbitrary length of [2] non-ASCII value,
without null character append.
ex) setting memory location 0x0802412 to 0x909090909090 value.
Is there any command that I can use?
memory gdb command settings
asked Nov 20 at 7:03
Jiwon
159113
There're several tricks on gdb to setting memory.
gdb> set {int}0x0804201 = 1337
Above trick can only sets [1] fixed 4 byte of [2] non-ASCII value.
gdb> set {char[5]}0x0804201 = "AAAA"
Above trick can only sets [1] arbitrary length of [2] ASCII value.
...And 'x00' append at the end of memory location.
Question.
I'm finding command that can sets [1] arbitrary length of [2] non-ASCII value,
without null character append.
ex) setting memory location 0x0802412 to 0x909090909090 value.
Is there any command that I can use?
memory gdb command settings
memory gdb command settings
asked Nov 20 at 7:03
Jiwon
159113
asked Nov 20 at 7:03
Jiwon
159113
asked Nov 20 at 7:03
Jiwon
159113
asked Nov 20 at 7:03
Jiwon
159113
asked Nov 20 at 7:03
Jiwon
159113
159113
0x909090909090is a long constant that can also be written0x0000909090909090. I think what you really want is to write 6 bytes of 0x90 and not 6 bytes of 0x90 followed by 2 bytes of 0x00, correct? If so, tryset {char[6]} 0x0802412 = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90}
– Mark Plotnick
Nov 20 at 15:17
add a comment |
0x909090909090is a long constant that can also be written0x0000909090909090. I think what you really want is to write 6 bytes of 0x90 and not 6 bytes of 0x90 followed by 2 bytes of 0x00, correct? If so, tryset {char[6]} 0x0802412 = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90}
– Mark Plotnick
Nov 20 at 15:17
0x909090909090 is a long constant that can also be written 0x0000909090909090. I think what you really want is to write 6 bytes of 0x90 and not 6 bytes of 0x90 followed by 2 bytes of 0x00, correct? If so, try set {char[6]} 0x0802412 = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90}– Mark Plotnick
Nov 20 at 15:17
0x909090909090 is a long constant that can also be written 0x0000909090909090. I think what you really want is to write 6 bytes of 0x90 and not 6 bytes of 0x90 followed by 2 bytes of 0x00, correct? If so, try set {char[6]} 0x0802412 = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90}– Mark Plotnick
Nov 20 at 15:17
add a comment |
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0x909090909090is a long constant that can also be written0x0000909090909090. I think what you really want is to write 6 bytes of 0x90 and not 6 bytes of 0x90 followed by 2 bytes of 0x00, correct? If so, tryset {char[6]} 0x0802412 = { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90}– Mark Plotnick
Nov 20 at 15:17