x86_64-linux cheatsheats

Plain files for syscalls, errnos, signals, registers, x86_64 instructions

For use with cheat:

$ export CHEATPATH=$CHEATPATH:/path/to/this/repo/pages
$ cheat syscalls
$ cheat registers
$ cheat errno
$ cheat EPERM
$ cheat instructions
$ cheat ADD
$ cheat signals
$ cheat SIGHUP
$ cheat printf

Introspect libc

(only glibc at the moment)

python3 libc.py repl
Type help or ? to list commands.
> print MAP_FAILED
0xffffffffffffffff
> print PROT_WRITE|PROT_READ
3
# defaults to print command
> &errno
0x7f3cb86b3fe0
> type MAP_FAILED
void*
> type memcmp
int (void const*, void const*, unsigned long)
> size "struct timeval"
16
> offset "struct timeval" "tv_usec"
8
> members "struct timeval"
struct timeval {
    __time_t tv_sec;
    __suseconds_t tv_usec;
}
> quit

Introspect the linux kernel (limited)

(only offset and size implemented so far)

python3 kernel.py repl
> offset "struct task_struct" "state"
$1 = 16

other architectures:

export KERNEL_DIR=$(nix-build --no-out-link '<nixpkgs>' --system aarch64-linux -A linux)

export KERNEL_DIR=$(nix-build --no-out-link '<nixpkgs>' --system i686-linux -A linux)