pwnlib.shellcraft.amd64 — Shellcode for AMD64

pwnlib.shellcraft.amd64

Shellcraft module containing generic Intel x86_64 shellcodes.

pwnlib.shellcraft.amd64.crash()

Crash.

Example

>>> run_assembly(shellcraft.crash()).poll(True)
-11

pwnlib.shellcraft.amd64.infloop()

A two-byte infinite loop.

pwnlib.shellcraft.amd64.itoa(v, buffer='rsp', allocate_stack=True)

Converts an integer into its string representation, and pushes it onto the stack.

Parameters:

• v (str, int) – Integer constant or register that contains the value to convert.
• alloca –

Example

>>> sc = shellcraft.amd64.mov('rax', 0xdeadbeef)
>>> sc += shellcraft.amd64.itoa('rax')
>>> sc += shellcraft.amd64.linux.write(1, 'rsp', 32)
>>> run_assembly(sc).recvuntil('\x00')
'3735928559\x00'

pwnlib.shellcraft.amd64.memcpy(dest, src, n)

Copies memory.

Parameters:

• dest – Destination address
• src – Source address
• n – Number of bytes

pwnlib.shellcraft.amd64.mov(dest, src, stack_allowed=True)

Move src into dest without newlines and null bytes.

If the src is a register smaller than the dest, then it will be zero-extended to fit inside the larger register.

If the src is a register larger than the dest, then only some of the bits will be used.

If src is a string that is not a register, then it will locally set context.arch to ‘amd64’ and use pwnlib.constants.eval() to evaluate the string. Note that this means that this shellcode can change behavior depending on the value of context.os.

Example

>>> print shellcraft.amd64.mov('eax','ebx').rstrip()
    mov eax, ebx
>>> print shellcraft.amd64.mov('eax', 0).rstrip()
    xor eax, eax /* 0 */
>>> print shellcraft.amd64.mov('ax', 0).rstrip()
    xor ax, ax /* 0 */
>>> print shellcraft.amd64.mov('rax', 0).rstrip()
    xor eax, eax /* 0 */
>>> print shellcraft.amd64.mov('rdi', 'ax').rstrip()
    movzx edi, ax
>>> print shellcraft.amd64.mov('al', 'ax').rstrip()
    /* moving ax into al, but this is a no-op */
>>> print shellcraft.amd64.mov('ax', 'bl').rstrip()
    movzx ax, bl
>>> print shellcraft.amd64.mov('eax', 1).rstrip()
    push 1
    pop rax
>>> print shellcraft.amd64.mov('rax', 0xc0).rstrip()
    xor eax, eax
    mov al, 0xc0
>>> print shellcraft.amd64.mov('rax', 0xc000).rstrip()
    xor eax, eax
    mov ah, 0xc000 >> 8
>>> print shellcraft.amd64.mov('rax', 0xc0c0).rstrip()
    xor eax, eax
    mov ax, 0xc0c0
>>> print shellcraft.amd64.mov('rdi', 0xff).rstrip()
    mov edi, 0x1010101 /* 255 == 0xff */
    xor edi, 0x10101fe
>>> print shellcraft.amd64.mov('rax', 0xdead00ff).rstrip()
    mov eax, 0x1010101 /* 3735879935 == 0xdead00ff */
    xor eax, 0xdfac01fe
>>> print shellcraft.amd64.mov('rax', 0x11dead00ff).rstrip()
    mov rax, 0x101010101010101 /* 76750323967 == 0x11dead00ff */
    push rax
    mov rax, 0x1010110dfac01fe
    xor [rsp], rax
    pop rax
>>> print shellcraft.amd64.mov('rax', 0xffffffff).rstrip()
    mov eax, 0xffffffff
>>> print shellcraft.amd64.mov('rax', 0x7fffffff).rstrip()
    mov eax, 0x7fffffff
>>> print shellcraft.amd64.mov('rax', 0x80010101).rstrip()
    mov eax, 0x80010101
>>> print shellcraft.amd64.mov('rax', 0x80000000).rstrip()
    mov eax, 0x1010101 /* 2147483648 == 0x80000000 */
    xor eax, 0x81010101
>>> with context.local(os = 'linux'):
...     print shellcraft.amd64.mov('eax', 'SYS_read').rstrip()
    xor eax, eax /* (SYS_read) */
>>> with context.local(os = 'freebsd'):
...     print shellcraft.amd64.mov('eax', 'SYS_read').rstrip()
    push (SYS_read) /* 3 */
    pop rax
>>> with context.local(os = 'linux'):
...     print shellcraft.amd64.mov('eax', 'PROT_READ | PROT_WRITE | PROT_EXEC').rstrip()
    push (PROT_READ | PROT_WRITE | PROT_EXEC) /* 7 */
    pop rax

Parameters:

• dest (str) – The destination register.
• src (str) – Either the input register, or an immediate value.
• stack_allowed (bool) – Can the stack be used?

pwnlib.shellcraft.amd64.nop()

A single-byte nop instruction.

pwnlib.shellcraft.amd64.popad()

Pop all of the registers onto the stack which i386 popad does, in the same order.

pwnlib.shellcraft.amd64.push(value)

Pushes a value onto the stack without using null bytes or newline characters.

If src is a string, then we try to evaluate with context.arch = ‘amd64’ using pwnlib.constants.eval() before determining how to push it. Note that this means that this shellcode can change behavior depending on the value of context.os.

Parameters:value (int,str) – The value or register to push

Example

>>> print pwnlib.shellcraft.amd64.push(0).rstrip()
    /* push 0 */
    push 1
    dec byte ptr [rsp]
>>> print pwnlib.shellcraft.amd64.push(1).rstrip()
    /* push 1 */
    push 1
>>> print pwnlib.shellcraft.amd64.push(256).rstrip()
    /* push 256 */
    push 0x1010201 ^ 0x100
    xor dword ptr [rsp], 0x1010201
>>> with context.local(os = 'linux'):
...     print pwnlib.shellcraft.amd64.push('SYS_write').rstrip()
    /* push 'SYS_write' */
    push 1
>>> with context.local(os = 'freebsd'):
...     print pwnlib.shellcraft.amd64.push('SYS_write').rstrip()
    /* push 'SYS_write' */
    push 4

pwnlib.shellcraft.amd64.pushad()

Push all of the registers onto the stack which i386 pushad does, in the same order.

pwnlib.shellcraft.amd64.pushstr(string, append_null=True)

Pushes a string onto the stack without using null bytes or newline characters.

Example

>>> print shellcraft.amd64.pushstr('').rstrip()
    /* push '\x00' */
    push 1
    dec byte ptr [rsp]
>>> print shellcraft.amd64.pushstr('a').rstrip()
    /* push 'a\x00' */
    push 0x61
>>> print shellcraft.amd64.pushstr('aa').rstrip()
    /* push 'aa\x00' */
    push 0x1010101 ^ 0x6161
    xor dword ptr [rsp], 0x1010101
>>> print shellcraft.amd64.pushstr('aaa').rstrip()
    /* push 'aaa\x00' */
    push 0x1010101 ^ 0x616161
    xor dword ptr [rsp], 0x1010101
>>> print shellcraft.amd64.pushstr('aaaa').rstrip()
    /* push 'aaaa\x00' */
    push 0x61616161
>>> print shellcraft.amd64.pushstr('aaa\xc3').rstrip()
    /* push 'aaa\xc3\x00' */
    mov rax, 0x101010101010101
    push rax
    mov rax, 0x101010101010101 ^ 0xc3616161
    xor [rsp], rax
>>> print shellcraft.amd64.pushstr('aaa\xc3', append_null = False).rstrip()
    /* push 'aaa\xc3' */
    push -0x3c9e9e9f
>>> print shellcraft.amd64.pushstr('\xc3').rstrip()
    /* push '\xc3\x00' */
    push 0x1010101 ^ 0xc3
    xor dword ptr [rsp], 0x1010101
>>> print shellcraft.amd64.pushstr('\xc3', append_null = False).rstrip()
    /* push '\xc3' */
    push -0x3d
>>> with context.local():
...    context.arch = 'amd64'
...    print enhex(asm(shellcraft.pushstr("/bin/sh")))
48b801010101010101015048b82e63686f2e72690148310424
>>> with context.local():
...    context.arch = 'amd64'
...    print enhex(asm(shellcraft.pushstr("")))
6a01fe0c24
>>> with context.local():
...    context.arch = 'amd64'
...    print enhex(asm(shellcraft.pushstr("\x00", False)))
6a01fe0c24

Parameters:

• string (str) – The string to push.
• append_null (bool) – Whether to append a single NULL-byte before pushing.

pwnlib.shellcraft.amd64.pushstr_array(reg, array)

Pushes an array/envp-style array of pointers onto the stack.

Parameters:

• reg (str) – Destination register to hold the pointer.
• array (str,list) – Single argument or list of arguments to push. NULL termination is normalized so that each argument ends with exactly one NULL byte.

pwnlib.shellcraft.amd64.ret(return_value=None)

A single-byte RET instruction.

Parameters:return_value – Value to return

pwnlib.shellcraft.amd64.setregs(reg_context, stack_allowed=True)

Sets multiple registers, taking any register dependencies into account (i.e., given eax=1,ebx=eax, set ebx first).

Parameters:

• reg_context (dict) – Desired register context
• stack_allowed (bool) – Can the stack be used?

Example

>>> print shellcraft.setregs({'rax':1, 'rbx':'rax'}).rstrip()
    mov rbx, rax
    push 1
    pop rax
>>> print shellcraft.setregs({'rax': 'SYS_write', 'rbx':'rax'}).rstrip()
    mov rbx, rax
    push (SYS_write) /* 1 */
    pop rax
>>> print shellcraft.setregs({'rax':'rbx', 'rbx':'rax', 'rcx':'rbx'}).rstrip()
    mov rcx, rbx
    xchg rax, rbx
>>> print shellcraft.setregs({'rax':1, 'rdx':0}).rstrip()
    push 1
    pop rax
    cdq /* rdx=0 */

pwnlib.shellcraft.amd64.strcpy(dst, src)

Copies a string

Example

>>> sc  = 'jmp get_str\n'
>>> sc += 'pop_str: pop rax\n'
>>> sc += shellcraft.amd64.strcpy('rsp', 'rax')
>>> sc += shellcraft.amd64.linux.write(1, 'rsp', 32)
>>> sc += shellcraft.amd64.linux.exit(0)
>>> sc += 'get_str: call pop_str\n'
>>> sc += '.asciz "Hello, world\\n"'
>>> run_assembly(sc).recvline()
'Hello, world\n'

pwnlib.shellcraft.amd64.strlen(string, reg='rcx')

Calculate the length of the specified string.

Parameters:

• string (str) – Register or address with the string
• reg (str) – Named register to return the value in, rcx is the default.

Example

>>> sc  = 'jmp get_str\n'
>>> sc += 'pop_str: pop rdi\n'
>>> sc += shellcraft.amd64.strlen('rdi', 'rax')
>>> sc += 'push rax;'
>>> sc += shellcraft.amd64.linux.write(1, 'rsp', 8)
>>> sc += shellcraft.amd64.linux.exit(0)
>>> sc += 'get_str: call pop_str\n'
>>> sc += '.asciz "Hello, world\\n"'
>>> run_assembly(sc).unpack() == len('Hello, world\n')
True

pwnlib.shellcraft.amd64.trap()

A trap instruction.

pwnlib.shellcraft.amd64.xor(key, address, count)

XORs data a constant value.

Parameters:

• key (int,str) – XOR key either as a 8-byte integer, If a string, length must be a power of two, and not longer than 8 bytes. Alternately, may be a register.
• address (int) – Address of the data (e.g. 0xdead0000, ‘esp’)
• count (int) – Number of bytes to XOR, or a register containing the number of bytes to XOR.

Example

>>> sc  = shellcraft.read(0, 'rsp', 32)
>>> sc += shellcraft.xor(0xdeadbeef, 'rsp', 32)
>>> sc += shellcraft.write(1, 'rsp', 32)
>>> io = run_assembly(sc)
>>> io.send(cyclic(32))
>>> result = io.recvn(32)
>>> expected = xor(cyclic(32), p32(0xdeadbeef))
>>> result == expected
True

pwnlib.shellcraft.amd64.linux

Shellcraft module containing Intel x86_64 shellcodes for Linux.

pwnlib.shellcraft.amd64.linux.accept(fd, addr, addr_len)

Invokes the syscall accept. See ‘man 2 accept’ for more information.

Parameters:

• fd (int) – fd
• addr (SOCKADDR_ARG) – addr
• addr_len (socklen_t) – addr_len

pwnlib.shellcraft.amd64.linux.access(name, type)

Invokes the syscall access. See ‘man 2 access’ for more information.

Parameters:

• name (char) – name
• type (int) – type

pwnlib.shellcraft.amd64.linux.acct(name)

Invokes the syscall acct. See ‘man 2 acct’ for more information.

Parameters:name (char) – name

pwnlib.shellcraft.amd64.linux.alarm(seconds)

Invokes the syscall alarm. See ‘man 2 alarm’ for more information.

Parameters:seconds (unsigned) – seconds

pwnlib.shellcraft.amd64.linux.bind(fd, addr, length)

Invokes the syscall bind. See ‘man 2 bind’ for more information.

Parameters:

• fd (int) – fd
• addr (CONST_SOCKADDR_ARG) – addr
• len (socklen_t) – len

pwnlib.shellcraft.amd64.linux.bindsh(port, network)

Listens on a TCP port and spawns a shell for the first to connect. Port is the TCP port to listen on, network is either ‘ipv4’ or ‘ipv6’.

pwnlib.shellcraft.amd64.linux.brk(addr)

Invokes the syscall brk. See ‘man 2 brk’ for more information.

Parameters:addr (void) – addr

pwnlib.shellcraft.amd64.linux.cat(filename, fd=1)

Opens a file and writes its contents to the specified file descriptor.

pwnlib.shellcraft.amd64.linux.chdir(path)

Invokes the syscall chdir. See ‘man 2 chdir’ for more information.

Parameters:path (char) – path

pwnlib.shellcraft.amd64.linux.chmod(file, mode)

Invokes the syscall chmod. See ‘man 2 chmod’ for more information.

Parameters:

• file (char) – file
• mode (mode_t) – mode

pwnlib.shellcraft.amd64.linux.chown(file, owner, group)

Invokes the syscall chown. See ‘man 2 chown’ for more information.

Parameters:

• file (char) – file
• owner (uid_t) – owner
• group (gid_t) – group

pwnlib.shellcraft.amd64.linux.chroot(path)

Invokes the syscall chroot. See ‘man 2 chroot’ for more information.

Parameters:path (char) – path

pwnlib.shellcraft.amd64.linux.clock_getres(clock_id, res)

Invokes the syscall clock_getres. See ‘man 2 clock_getres’ for more information.

Parameters:

• clock_id (clockid_t) – clock_id
• res (timespec) – res

pwnlib.shellcraft.amd64.linux.clock_gettime(clock_id, tp)

Invokes the syscall clock_gettime. See ‘man 2 clock_gettime’ for more information.

Parameters:

• clock_id (clockid_t) – clock_id
• tp (timespec) – tp

pwnlib.shellcraft.amd64.linux.clock_nanosleep(clock_id, flags, req, rem)

Invokes the syscall clock_nanosleep. See ‘man 2 clock_nanosleep’ for more information.

Parameters:

• clock_id (clockid_t) – clock_id
• flags (int) – flags
• req (timespec) – req
• rem (timespec) – rem

pwnlib.shellcraft.amd64.linux.clock_settime(clock_id, tp)

Invokes the syscall clock_settime. See ‘man 2 clock_settime’ for more information.

Parameters:

• clock_id (clockid_t) – clock_id
• tp (timespec) – tp

pwnlib.shellcraft.amd64.linux.clone(fn, child_stack, flags, arg, vararg)

Invokes the syscall clone. See ‘man 2 clone’ for more information.

Parameters:

• fn (int) – fn
• child_stack (void) – child_stack
• flags (int) – flags
• arg (void) – arg
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.close(fd)

Invokes the syscall close. See ‘man 2 close’ for more information.

Parameters:fd (int) – fd

pwnlib.shellcraft.amd64.linux.connect(host, port, network='ipv4')

Connects to the host on the specified port. Network is either ‘ipv4’ or ‘ipv6’. Leaves the connected socket in rbp.

pwnlib.shellcraft.amd64.linux.connectstager(host, port, network='ipv4')

connect recvsize stager :param host, where to connect to: :param port, which port to connect to: :param network, ipv4 or ipv6? (default: ipv4)

pwnlib.shellcraft.amd64.linux.creat(file, mode)

Invokes the syscall creat. See ‘man 2 creat’ for more information.

Parameters:

• file (char) – file
• mode (mode_t) – mode

pwnlib.shellcraft.amd64.linux.dup(sock='rbp')

Args: [sock (imm/reg) = rbp] Duplicates sock to stdin, stdout and stderr

pwnlib.shellcraft.amd64.linux.dup2(fd, fd2)

Invokes the syscall dup2. See ‘man 2 dup2’ for more information.

Parameters:

• fd (int) – fd
• fd2 (int) – fd2

pwnlib.shellcraft.amd64.linux.dup3(fd, fd2, flags)

Invokes the syscall dup3. See ‘man 2 dup3’ for more information.

Parameters:

• fd (int) – fd
• fd2 (int) – fd2
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.dupsh(sock='rbp')

Args: [sock (imm/reg) = rbp] Duplicates sock to stdin, stdout and stderr and spawns a shell.

pwnlib.shellcraft.amd64.linux.echo(string, sock='1')

Writes a string to a file descriptor

pwnlib.shellcraft.amd64.linux.egghunter(egg, start_address = 0)

Searches memory for the byte sequence ‘egg’.

Return value is the address immediately following the match, stored in RDI.

Parameters:

• egg (str, int) – String of bytes, or word-size integer to search for
• start_address (int) – Where to start the search

pwnlib.shellcraft.amd64.linux.epoll_create(size)

Invokes the syscall epoll_create. See ‘man 2 epoll_create’ for more information.

Parameters:size (int) – size

pwnlib.shellcraft.amd64.linux.epoll_create1(flags)

Invokes the syscall epoll_create1. See ‘man 2 epoll_create1’ for more information.

Parameters:flags (int) – flags

pwnlib.shellcraft.amd64.linux.epoll_ctl(epfd, op, fd, event)

Invokes the syscall epoll_ctl. See ‘man 2 epoll_ctl’ for more information.

Parameters:

• epfd (int) – epfd
• op (int) – op
• fd (int) – fd
• event (epoll_event) – event

pwnlib.shellcraft.amd64.linux.epoll_pwait(epfd, events, maxevents, timeout, ss)

Invokes the syscall epoll_pwait. See ‘man 2 epoll_pwait’ for more information.

Parameters:

• epfd (int) – epfd
• events (epoll_event) – events
• maxevents (int) – maxevents
• timeout (int) – timeout
• ss (sigset_t) – ss

pwnlib.shellcraft.amd64.linux.epoll_wait(epfd, events, maxevents, timeout)

Invokes the syscall epoll_wait. See ‘man 2 epoll_wait’ for more information.

Parameters:

• epfd (int) – epfd
• events (epoll_event) – events
• maxevents (int) – maxevents
• timeout (int) – timeout

pwnlib.shellcraft.amd64.linux.execve(path='/bin///sh', argv=[], envp={})

Execute a different process.

Attempts to perform some automatic detection of types. Otherwise, the arguments behave as normal.

• If path is a string that is not a known register, it is pushed onto the stack.
• If argv is an array of strings, it is pushed onto the stack, and NULL-terminated.
• If envp is an dictionary of {string:string}, it is pushed onto the stack, and NULL-terminated.

Example

>>> path = '/bin/sh'
>>> argv = ['sh', '-c', 'echo Hello, $NAME; exit $STATUS']
>>> envp = {'NAME': 'zerocool', 'STATUS': 3}
>>> sc = shellcraft.amd64.linux.execve(path, argv, envp)
>>> io = run_assembly(sc)
>>> io.recvall()
'Hello, zerocool\n'
>>> io.poll(True)
3

pwnlib.shellcraft.amd64.linux.exit(status=None)

Invokes the syscall exit. See ‘man 2 exit’ for more information.

Parameters:status (int) – status

Doctest

>>> run_assembly_exitcode(shellcraft.exit(33))
33

pwnlib.shellcraft.amd64.linux.faccessat(fd, file, type, flag)

Invokes the syscall faccessat. See ‘man 2 faccessat’ for more information.

Parameters:

• fd (int) – fd
• file (char) – file
• type (int) – type
• flag (int) – flag

pwnlib.shellcraft.amd64.linux.fallocate(fd, mode, offset, length)

Invokes the syscall fallocate. See ‘man 2 fallocate’ for more information.

Parameters:

• fd (int) – fd
• mode (int) – mode
• offset (off_t) – offset
• len (off_t) – len

pwnlib.shellcraft.amd64.linux.fchdir(fd)

Invokes the syscall fchdir. See ‘man 2 fchdir’ for more information.

Parameters:fd (int) – fd

pwnlib.shellcraft.amd64.linux.fchmod(fd, mode)

Invokes the syscall fchmod. See ‘man 2 fchmod’ for more information.

Parameters:

• fd (int) – fd
• mode (mode_t) – mode

pwnlib.shellcraft.amd64.linux.fchmodat(fd, file, mode, flag)

Invokes the syscall fchmodat. See ‘man 2 fchmodat’ for more information.

Parameters:

• fd (int) – fd
• file (char) – file
• mode (mode_t) – mode
• flag (int) – flag

pwnlib.shellcraft.amd64.linux.fchown(fd, owner, group)

Invokes the syscall fchown. See ‘man 2 fchown’ for more information.

Parameters:

• fd (int) – fd
• owner (uid_t) – owner
• group (gid_t) – group

pwnlib.shellcraft.amd64.linux.fchownat(fd, file, owner, group, flag)

Invokes the syscall fchownat. See ‘man 2 fchownat’ for more information.

Parameters:

• fd (int) – fd
• file (char) – file
• owner (uid_t) – owner
• group (gid_t) – group
• flag (int) – flag

pwnlib.shellcraft.amd64.linux.fcntl(fd, cmd, vararg)

Invokes the syscall fcntl. See ‘man 2 fcntl’ for more information.

Parameters:

• fd (int) – fd
• cmd (int) – cmd
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.fdatasync(fildes)

Invokes the syscall fdatasync. See ‘man 2 fdatasync’ for more information.

Parameters:fildes (int) – fildes

pwnlib.shellcraft.amd64.linux.findpeer(port=None)

Args: port (defaults to any port) Finds a socket, which is connected to the specified port. Leaves socket in RDI.

pwnlib.shellcraft.amd64.linux.findpeersh(port=None)

Args: port (defaults to any) Finds an open socket which connects to a specified port, and then opens a dup2 shell on it.

pwnlib.shellcraft.amd64.linux.findpeerstager(port=None)

Findpeer recvsize stager :param port, the port given to findpeer: :type port, the port given to findpeer: defaults to any

pwnlib.shellcraft.amd64.linux.flock(fd, operation)

Invokes the syscall flock. See ‘man 2 flock’ for more information.

Parameters:

• fd (int) – fd
• operation (int) – operation

pwnlib.shellcraft.amd64.linux.fork()

Invokes the syscall fork. See ‘man 2 fork’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.forkbomb()

Performs a forkbomb attack.

pwnlib.shellcraft.amd64.linux.forkexit()

Attempts to fork. If the fork is successful, the parent exits.

pwnlib.shellcraft.amd64.linux.fstat(fd, buf)

Invokes the syscall fstat. See ‘man 2 fstat’ for more information.

Parameters:

• fd (int) – fd
• buf (stat) – buf

pwnlib.shellcraft.amd64.linux.fstat64(fd, buf)

Invokes the syscall fstat64. See ‘man 2 fstat64’ for more information.

Parameters:

• fd (int) – fd
• buf (stat64) – buf

pwnlib.shellcraft.amd64.linux.fstatat64(fd, file, buf, flag)

Invokes the syscall fstatat64. See ‘man 2 fstatat64’ for more information.

Parameters:

• fd (int) – fd
• file (char) – file
• buf (stat64) – buf
• flag (int) – flag

pwnlib.shellcraft.amd64.linux.fsync(fd)

Invokes the syscall fsync. See ‘man 2 fsync’ for more information.

Parameters:fd (int) – fd

pwnlib.shellcraft.amd64.linux.ftruncate(fd, length)

Invokes the syscall ftruncate. See ‘man 2 ftruncate’ for more information.

Parameters:

• fd (int) – fd
• length (off_t) – length

pwnlib.shellcraft.amd64.linux.ftruncate64(fd, length)

Invokes the syscall ftruncate64. See ‘man 2 ftruncate64’ for more information.

Parameters:

• fd (int) – fd
• length (off64_t) – length

pwnlib.shellcraft.amd64.linux.futimesat(fd, file, tvp)

Invokes the syscall futimesat. See ‘man 2 futimesat’ for more information.

Parameters:

• fd (int) – fd
• file (char) – file
• tvp (timeval) – tvp

pwnlib.shellcraft.amd64.linux.getcwd(buf, size)

Invokes the syscall getcwd. See ‘man 2 getcwd’ for more information.

Parameters:

• buf (char) – buf
• size (size_t) – size

pwnlib.shellcraft.amd64.linux.getegid()

Invokes the syscall getegid. See ‘man 2 getegid’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.geteuid()

Invokes the syscall geteuid. See ‘man 2 geteuid’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.getgid()

Invokes the syscall getgid. See ‘man 2 getgid’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.getgroups(size, list)

Invokes the syscall getgroups. See ‘man 2 getgroups’ for more information.

Parameters:

• size (int) – size
• list (gid_t) – list

pwnlib.shellcraft.amd64.linux.getitimer(which, value)

Invokes the syscall getitimer. See ‘man 2 getitimer’ for more information.

Parameters:

• which (itimer_which_t) – which
• value (itimerval) – value

pwnlib.shellcraft.amd64.linux.getpeername(fd, addr, length)

Invokes the syscall getpeername. See ‘man 2 getpeername’ for more information.

Parameters:

• fd (int) – fd
• addr (SOCKADDR_ARG) – addr
• len (socklen_t) – len

pwnlib.shellcraft.amd64.linux.getpgid(pid)

Invokes the syscall getpgid. See ‘man 2 getpgid’ for more information.

Parameters:pid (pid_t) – pid

pwnlib.shellcraft.amd64.linux.getpgrp()

Invokes the syscall getpgrp. See ‘man 2 getpgrp’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.getpid()

Retrieve the current PID

pwnlib.shellcraft.amd64.linux.getpmsg(fildes, ctlptr, dataptr, bandp, flagsp)

Invokes the syscall getpmsg. See ‘man 2 getpmsg’ for more information.

Parameters:

• fildes (int) – fildes
• ctlptr (strbuf) – ctlptr
• dataptr (strbuf) – dataptr
• bandp (int) – bandp
• flagsp (int) – flagsp

pwnlib.shellcraft.amd64.linux.getppid()

Invokes the syscall getppid. See ‘man 2 getppid’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.getpriority(which, who)

Invokes the syscall getpriority. See ‘man 2 getpriority’ for more information.

Parameters:

• which (priority_which_t) – which
• who (id_t) – who

pwnlib.shellcraft.amd64.linux.getresgid(rgid, egid, sgid)

Invokes the syscall getresgid. See ‘man 2 getresgid’ for more information.

Parameters:

• rgid (gid_t) – rgid
• egid (gid_t) – egid
• sgid (gid_t) – sgid

pwnlib.shellcraft.amd64.linux.getresuid(ruid, euid, suid)

Invokes the syscall getresuid. See ‘man 2 getresuid’ for more information.

Parameters:

• ruid (uid_t) – ruid
• euid (uid_t) – euid
• suid (uid_t) – suid

pwnlib.shellcraft.amd64.linux.getrlimit(resource, rlimits)

Invokes the syscall getrlimit. See ‘man 2 getrlimit’ for more information.

Parameters:

• resource (rlimit_resource_t) – resource
• rlimits (rlimit) – rlimits

pwnlib.shellcraft.amd64.linux.getrusage(who, usage)

Invokes the syscall getrusage. See ‘man 2 getrusage’ for more information.

Parameters:

• who (rusage_who_t) – who
• usage (rusage) – usage

pwnlib.shellcraft.amd64.linux.getsid(pid)

Invokes the syscall getsid. See ‘man 2 getsid’ for more information.

Parameters:pid (pid_t) – pid

pwnlib.shellcraft.amd64.linux.getsockname(fd, addr, length)

Invokes the syscall getsockname. See ‘man 2 getsockname’ for more information.

Parameters:

• fd (int) – fd
• addr (SOCKADDR_ARG) – addr
• len (socklen_t) – len

pwnlib.shellcraft.amd64.linux.getsockopt(fd, level, optname, optval, optlen)

Invokes the syscall getsockopt. See ‘man 2 getsockopt’ for more information.

Parameters:

• fd (int) – fd
• level (int) – level
• optname (int) – optname
• optval (void) – optval
• optlen (socklen_t) – optlen

pwnlib.shellcraft.amd64.linux.gettimeofday(tv, tz)

Invokes the syscall gettimeofday. See ‘man 2 gettimeofday’ for more information.

Parameters:

• tv (timeval) – tv
• tz (timezone_ptr_t) – tz

pwnlib.shellcraft.amd64.linux.getuid()

Invokes the syscall getuid. See ‘man 2 getuid’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.gtty(fd, params)

Invokes the syscall gtty. See ‘man 2 gtty’ for more information.

Parameters:

• fd (int) – fd
• params (sgttyb) – params

pwnlib.shellcraft.amd64.linux.ioctl(fd, request, vararg)

Invokes the syscall ioctl. See ‘man 2 ioctl’ for more information.

Parameters:

• fd (int) – fd
• request (unsigned) – request
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.ioperm(from_, num, turn_on)

Invokes the syscall ioperm. See ‘man 2 ioperm’ for more information.

Parameters:

• from (unsigned) – from
• num (unsigned) – num
• turn_on (int) – turn_on

pwnlib.shellcraft.amd64.linux.iopl(level)

Invokes the syscall iopl. See ‘man 2 iopl’ for more information.

Parameters:level (int) – level

pwnlib.shellcraft.amd64.linux.kill(pid, signal='SIGKILL')

Writes a string to a file descriptor

pwnlib.shellcraft.amd64.linux.killparent()

Kills its parent process until whatever the parent is (probably init) cannot be killed any longer.

pwnlib.shellcraft.amd64.linux.lchown(file, owner, group)

Invokes the syscall lchown. See ‘man 2 lchown’ for more information.

Parameters:

• file (char) – file
• owner (uid_t) – owner
• group (gid_t) – group

pwnlib.shellcraft.amd64.linux.link(from_, to)

Invokes the syscall link. See ‘man 2 link’ for more information.

Parameters:

• from (char) – from
• to (char) – to

pwnlib.shellcraft.amd64.linux.linkat(fromfd, from_, tofd, to, flags)

Invokes the syscall linkat. See ‘man 2 linkat’ for more information.

Parameters:

• fromfd (int) – fromfd
• from (char) – from
• tofd (int) – tofd
• to (char) – to
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.listen(port, network)

Listens on a TCP port, accept a client and leave his socket in RAX. Port is the TCP port to listen on, network is either ‘ipv4’ or ‘ipv6’.

pwnlib.shellcraft.amd64.linux.loader(address)

Loads a statically-linked ELF into memory and transfers control.

Parameters:address (int) – Address of the ELF as a register or integer.

pwnlib.shellcraft.amd64.linux.loader_append(data=None)

Loads a statically-linked ELF into memory and transfers control.

Similar to loader.asm but loads an appended ELF.

Parameters:data (str) – If a valid filename, the data is loaded from the named file. Otherwise, this is treated as raw ELF data to append. If None, it is ignored.

Example

>>> gcc = process(['gcc','-m64','-xc','-static','-Wl,-Ttext-segment=0x20000000','-'])
>>> gcc.write('''
... int main() {
...     printf("Hello, %s!\\n", "amd64");
... }
... ''')
>>> gcc.shutdown('send')
>>> gcc.poll(True)
0
>>> sc = shellcraft.loader_append('a.out')

The following doctest is commented out because it doesn’t work on Travis for reasons I cannot diagnose. However, it should work just fine :-)

# >>> run_assembly(sc).recvline() == ‘Hello, amd64!n’ # True

pwnlib.shellcraft.amd64.linux.lseek(fd, offset, whence)

Invokes the syscall lseek. See ‘man 2 lseek’ for more information.

Parameters:

• fd (int) – fd
• offset (off_t) – offset
• whence (int) – whence

pwnlib.shellcraft.amd64.linux.lstat(file, buf)

Invokes the syscall lstat. See ‘man 2 lstat’ for more information.

Parameters:

• file (char) – file
• buf (stat) – buf

pwnlib.shellcraft.amd64.linux.lstat64(file, buf)

Invokes the syscall lstat64. See ‘man 2 lstat64’ for more information.

Parameters:

• file (char) – file
• buf (stat64) – buf

pwnlib.shellcraft.amd64.linux.madvise(addr, length, advice)

Invokes the syscall madvise. See ‘man 2 madvise’ for more information.

Parameters:

• addr (void) – addr
• len (size_t) – len
• advice (int) – advice

pwnlib.shellcraft.amd64.linux.membot(readsock=0, writesock=1)

Read-write access to a remote process’ memory.

Provide a single pointer-width value to determine the operation to perform:

• 0: Exit the loop
• 1: Read data
• 2: Write data

pwnlib.shellcraft.amd64.linux.migrate_stack(size=1048576, fd=0)

Migrates to a new stack.

pwnlib.shellcraft.amd64.linux.mincore(start, length, vec)

Invokes the syscall mincore. See ‘man 2 mincore’ for more information.

Parameters:

• start (void) – start
• len (size_t) – len
• vec (unsigned) – vec

pwnlib.shellcraft.amd64.linux.mkdir(path, mode)

Invokes the syscall mkdir. See ‘man 2 mkdir’ for more information.

Parameters:

• path (char) – path
• mode (mode_t) – mode

pwnlib.shellcraft.amd64.linux.mkdirat(fd, path, mode)

Invokes the syscall mkdirat. See ‘man 2 mkdirat’ for more information.

Parameters:

• fd (int) – fd
• path (char) – path
• mode (mode_t) – mode

pwnlib.shellcraft.amd64.linux.mknod(path, mode, dev)

Invokes the syscall mknod. See ‘man 2 mknod’ for more information.

Parameters:

• path (char) – path
• mode (mode_t) – mode
• dev (dev_t) – dev

pwnlib.shellcraft.amd64.linux.mknodat(fd, path, mode, dev)

Invokes the syscall mknodat. See ‘man 2 mknodat’ for more information.

Parameters:

• fd (int) – fd
• path (char) – path
• mode (mode_t) – mode
• dev (dev_t) – dev

pwnlib.shellcraft.amd64.linux.mlock(addr, length)

Invokes the syscall mlock. See ‘man 2 mlock’ for more information.

Parameters:

• addr (void) – addr
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.mlockall(flags)

Invokes the syscall mlockall. See ‘man 2 mlockall’ for more information.

Parameters:flags (int) – flags

pwnlib.shellcraft.amd64.linux.mmap(addr=0, length=4096, prot=7, flags=34, fd=-1, offset=0)

Invokes the syscall mmap. See ‘man 2 mmap’ for more information.

Parameters:

• addr (void) – addr
• length (size_t) – length
• prot (int) – prot
• flags (int) – flags
• fd (int) – fd
• offset (off_t) – offset

pwnlib.shellcraft.amd64.linux.mmap_rwx(size=4096, protection=7, address=None)

Maps some memory

pwnlib.shellcraft.amd64.linux.mov(dest, src, stack_allowed=True)

Move src into dest without newlines and null bytes.

If the src is a register smaller than the dest, then it will be zero-extended to fit inside the larger register.

If the src is a register larger than the dest, then only some of the bits will be used.

If src is a string that is not a register, then it will locally set context.arch to ‘amd64’ and use pwnlib.constants.eval() to evaluate the string. Note that this means that this shellcode can change behavior depending on the value of context.os.

Example

>>> print shellcraft.amd64.mov('eax','ebx').rstrip()
    mov eax, ebx
>>> print shellcraft.amd64.mov('eax', 0).rstrip()
    xor eax, eax /* 0 */
>>> print shellcraft.amd64.mov('ax', 0).rstrip()
    xor ax, ax /* 0 */
>>> print shellcraft.amd64.mov('rax', 0).rstrip()
    xor eax, eax /* 0 */
>>> print shellcraft.amd64.mov('rdi', 'ax').rstrip()
    movzx edi, ax
>>> print shellcraft.amd64.mov('al', 'ax').rstrip()
    /* moving ax into al, but this is a no-op */
>>> print shellcraft.amd64.mov('ax', 'bl').rstrip()
    movzx ax, bl
>>> print shellcraft.amd64.mov('eax', 1).rstrip()
    push 1
    pop rax
>>> print shellcraft.amd64.mov('rax', 0xc0).rstrip()
    xor eax, eax
    mov al, 0xc0
>>> print shellcraft.amd64.mov('rax', 0xc000).rstrip()
    xor eax, eax
    mov ah, 0xc000 >> 8
>>> print shellcraft.amd64.mov('rax', 0xc0c0).rstrip()
    xor eax, eax
    mov ax, 0xc0c0
>>> print shellcraft.amd64.mov('rdi', 0xff).rstrip()
    mov edi, 0x1010101 /* 255 == 0xff */
    xor edi, 0x10101fe
>>> print shellcraft.amd64.mov('rax', 0xdead00ff).rstrip()
    mov eax, 0x1010101 /* 3735879935 == 0xdead00ff */
    xor eax, 0xdfac01fe
>>> print shellcraft.amd64.mov('rax', 0x11dead00ff).rstrip()
    mov rax, 0x101010101010101 /* 76750323967 == 0x11dead00ff */
    push rax
    mov rax, 0x1010110dfac01fe
    xor [rsp], rax
    pop rax
>>> print shellcraft.amd64.mov('rax', 0xffffffff).rstrip()
    mov eax, 0xffffffff
>>> print shellcraft.amd64.mov('rax', 0x7fffffff).rstrip()
    mov eax, 0x7fffffff
>>> print shellcraft.amd64.mov('rax', 0x80010101).rstrip()
    mov eax, 0x80010101
>>> print shellcraft.amd64.mov('rax', 0x80000000).rstrip()
    mov eax, 0x1010101 /* 2147483648 == 0x80000000 */
    xor eax, 0x81010101
>>> with context.local(os = 'linux'):
...     print shellcraft.amd64.mov('eax', 'SYS_read').rstrip()
    xor eax, eax /* (SYS_read) */
>>> with context.local(os = 'freebsd'):
...     print shellcraft.amd64.mov('eax', 'SYS_read').rstrip()
    push (SYS_read) /* 3 */
    pop rax
>>> with context.local(os = 'linux'):
...     print shellcraft.amd64.mov('eax', 'PROT_READ | PROT_WRITE | PROT_EXEC').rstrip()
    push (PROT_READ | PROT_WRITE | PROT_EXEC) /* 7 */
    pop rax

Parameters:

• dest (str) – The destination register.
• src (str) – Either the input register, or an immediate value.
• stack_allowed (bool) – Can the stack be used?

pwnlib.shellcraft.amd64.linux.mprotect(addr, length, prot)

Invokes the syscall mprotect. See ‘man 2 mprotect’ for more information.

Parameters:

• addr (void) – addr
• length (size_t) – length
• prot (int) – prot

pwnlib.shellcraft.amd64.linux.mq_notify(mqdes, notification)

Invokes the syscall mq_notify. See ‘man 2 mq_notify’ for more information.

Parameters:

• mqdes (mqd_t) – mqdes
• notification (sigevent) – notification

pwnlib.shellcraft.amd64.linux.mq_open(name, oflag, vararg)

Invokes the syscall mq_open. See ‘man 2 mq_open’ for more information.

Parameters:

• name (char) – name
• oflag (int) – oflag
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.mq_timedreceive(mqdes, msg_ptr, msg_len, msg_prio, abs_timeout)

Invokes the syscall mq_timedreceive. See ‘man 2 mq_timedreceive’ for more information.

Parameters:

• mqdes (mqd_t) – mqdes
• msg_ptr (char) – msg_ptr
• msg_len (size_t) – msg_len
• msg_prio (unsigned) – msg_prio
• abs_timeout (timespec) – abs_timeout

pwnlib.shellcraft.amd64.linux.mq_timedsend(mqdes, msg_ptr, msg_len, msg_prio, abs_timeout)

Invokes the syscall mq_timedsend. See ‘man 2 mq_timedsend’ for more information.

Parameters:

• mqdes (mqd_t) – mqdes
• msg_ptr (char) – msg_ptr
• msg_len (size_t) – msg_len
• msg_prio (unsigned) – msg_prio
• abs_timeout (timespec) – abs_timeout

pwnlib.shellcraft.amd64.linux.mq_unlink(name)

Invokes the syscall mq_unlink. See ‘man 2 mq_unlink’ for more information.

Parameters:name (char) – name

pwnlib.shellcraft.amd64.linux.mremap(addr, old_len, new_len, flags, vararg)

Invokes the syscall mremap. See ‘man 2 mremap’ for more information.

Parameters:

• addr (void) – addr
• old_len (size_t) – old_len
• new_len (size_t) – new_len
• flags (int) – flags
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.msync(addr, length, flags)

Invokes the syscall msync. See ‘man 2 msync’ for more information.

Parameters:

• addr (void) – addr
• len (size_t) – len
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.munlock(addr, length)

Invokes the syscall munlock. See ‘man 2 munlock’ for more information.

Parameters:

• addr (void) – addr
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.munlockall()

Invokes the syscall munlockall. See ‘man 2 munlockall’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.munmap(addr, length)

Invokes the syscall munmap. See ‘man 2 munmap’ for more information.

Parameters:

• addr (void) – addr
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.nanosleep(requested_time, remaining)

Invokes the syscall nanosleep. See ‘man 2 nanosleep’ for more information.

Parameters:

• requested_time (timespec) – requested_time
• remaining (timespec) – remaining

pwnlib.shellcraft.amd64.linux.nice(inc)

Invokes the syscall nice. See ‘man 2 nice’ for more information.

Parameters:inc (int) – inc

pwnlib.shellcraft.amd64.linux.open(file, oflag, vararg)

Invokes the syscall open. See ‘man 2 open’ for more information.

Parameters:

• file (char) – file
• oflag (int) – oflag
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.openat(fd, file, oflag, vararg)

Invokes the syscall openat. See ‘man 2 openat’ for more information.

Parameters:

• fd (int) – fd
• file (char) – file
• oflag (int) – oflag
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.pause()

Invokes the syscall pause. See ‘man 2 pause’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.pipe(pipedes)

Invokes the syscall pipe. See ‘man 2 pipe’ for more information.

Parameters:pipedes (int) – pipedes

pwnlib.shellcraft.amd64.linux.pipe2(pipedes, flags)

Invokes the syscall pipe2. See ‘man 2 pipe2’ for more information.

Parameters:

• pipedes (int) – pipedes
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.poll(fds, nfds, timeout)

Invokes the syscall poll. See ‘man 2 poll’ for more information.

Parameters:

• fds (pollfd) – fds
• nfds (nfds_t) – nfds
• timeout (int) – timeout

pwnlib.shellcraft.amd64.linux.ppoll(fds, nfds, timeout, ss)

Invokes the syscall ppoll. See ‘man 2 ppoll’ for more information.

Parameters:

• fds (pollfd) – fds
• nfds (nfds_t) – nfds
• timeout (timespec) – timeout
• ss (sigset_t) – ss

pwnlib.shellcraft.amd64.linux.prctl(option, *vararg)

Invokes the syscall prctl. See ‘man 2 prctl’ for more information.

Parameters:

• option (int) – option
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.pread(fd, buf, nbytes, offset)

Invokes the syscall pread. See ‘man 2 pread’ for more information.

Parameters:

• fd (int) – fd
• buf (void) – buf
• nbytes (size_t) – nbytes
• offset (off_t) – offset

pwnlib.shellcraft.amd64.linux.preadv(fd, iovec, count, offset)

Invokes the syscall preadv. See ‘man 2 preadv’ for more information.

Parameters:

• fd (int) – fd
• iovec (iovec) – iovec
• count (int) – count
• offset (off_t) – offset

pwnlib.shellcraft.amd64.linux.prlimit64(pid, resource, new_limit, old_limit)

Invokes the syscall prlimit64. See ‘man 2 prlimit64’ for more information.

Parameters:

• pid (pid_t) – pid
• resource (rlimit_resource) – resource
• new_limit (rlimit64) – new_limit
• old_limit (rlimit64) – old_limit

pwnlib.shellcraft.amd64.linux.profil(sample_buffer, size, offset, scale)

Invokes the syscall profil. See ‘man 2 profil’ for more information.

Parameters:

• sample_buffer (unsigned) – sample_buffer
• size (size_t) – size
• offset (size_t) – offset
• scale (unsigned) – scale

pwnlib.shellcraft.amd64.linux.ptrace(request, *vararg)

Invokes the syscall ptrace. See ‘man 2 ptrace’ for more information.

Parameters:

• request (ptrace_request) – request
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.push(value)

Pushes a value onto the stack without using null bytes or newline characters.

If src is a string, then we try to evaluate with context.arch = ‘amd64’ using pwnlib.constants.eval() before determining how to push it. Note that this means that this shellcode can change behavior depending on the value of context.os.

Parameters:value (int,str) – The value or register to push

Example

>>> print pwnlib.shellcraft.amd64.push(0).rstrip()
    /* push 0 */
    push 1
    dec byte ptr [rsp]
>>> print pwnlib.shellcraft.amd64.push(1).rstrip()
    /* push 1 */
    push 1
>>> print pwnlib.shellcraft.amd64.push(256).rstrip()
    /* push 256 */
    push 0x1010201 ^ 0x100
    xor dword ptr [rsp], 0x1010201
>>> with context.local(os = 'linux'):
...     print pwnlib.shellcraft.amd64.push('SYS_write').rstrip()
    /* push 'SYS_write' */
    push 1
>>> with context.local(os = 'freebsd'):
...     print pwnlib.shellcraft.amd64.push('SYS_write').rstrip()
    /* push 'SYS_write' */
    push 4

pwnlib.shellcraft.amd64.linux.putpmsg(fildes, ctlptr, dataptr, band, flags)

Invokes the syscall putpmsg. See ‘man 2 putpmsg’ for more information.

Parameters:

• fildes (int) – fildes
• ctlptr (strbuf) – ctlptr
• dataptr (strbuf) – dataptr
• band (int) – band
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.pwrite(fd, buf, n, offset)

Invokes the syscall pwrite. See ‘man 2 pwrite’ for more information.

Parameters:

• fd (int) – fd
• buf (void) – buf
• n (size_t) – n
• offset (off_t) – offset

pwnlib.shellcraft.amd64.linux.pwritev(fd, iovec, count, offset)

Invokes the syscall pwritev. See ‘man 2 pwritev’ for more information.

Parameters:

• fd (int) – fd
• iovec (iovec) – iovec
• count (int) – count
• offset (off_t) – offset

pwnlib.shellcraft.amd64.linux.read(fd=0, buffer='rsp', count=8)

Reads data from the file descriptor into the provided buffer. This is a one-shot and does not fill the request.

pwnlib.shellcraft.amd64.linux.read_upto(fd=0, buffer='rsp', sizereg='rdx')

Reads up to N bytes 8 bytes into the specified register

pwnlib.shellcraft.amd64.linux.readahead(fd, offset, count)

Invokes the syscall readahead. See ‘man 2 readahead’ for more information.

Parameters:

• fd (int) – fd
• offset (off64_t) – offset
• count (size_t) – count

pwnlib.shellcraft.amd64.linux.readdir(dirp)

Invokes the syscall readdir. See ‘man 2 readdir’ for more information.

Parameters:dirp (DIR) – dirp

pwnlib.shellcraft.amd64.linux.readfile(path, dst='rdi')

Args: [path, dst (imm/reg) = rdi ] Opens the specified file path and sends its content to the specified file descriptor.

pwnlib.shellcraft.amd64.linux.readinto(sock=0)

Reads into a buffer of a size and location determined at runtime. When the shellcode is executing, it should send a pointer and pointer-width size to determine the location and size of buffer.

pwnlib.shellcraft.amd64.linux.readlink(path, buf, length)

Invokes the syscall readlink. See ‘man 2 readlink’ for more information.

Parameters:

• path (char) – path
• buf (char) – buf
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.readlinkat(fd, path, buf, length)

Invokes the syscall readlinkat. See ‘man 2 readlinkat’ for more information.

Parameters:

• fd (int) – fd
• path (char) – path
• buf (char) – buf
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.readloop(sock=0)

Reads into a buffer of a size and location determined at runtime. When the shellcode is executing, it should send a pointer and pointer-width size to determine the location and size of buffer.

pwnlib.shellcraft.amd64.linux.readn(fd, buf, nbytes)

Reads exactly nbytes bytes from file descriptor fd into the buffer buf.

Parameters:

• fd (int) – fd
• buf (void) – buf
• nbytes (size_t) – nbytes

pwnlib.shellcraft.amd64.linux.readptr(fd=0, target_reg='rdx')

Reads 8 bytes into the specified register

pwnlib.shellcraft.amd64.linux.readv(fd, iovec, count)

Invokes the syscall readv. See ‘man 2 readv’ for more information.

Parameters:

• fd (int) – fd
• iovec (iovec) – iovec
• count (int) – count

pwnlib.shellcraft.amd64.linux.recv(fd, buf, n, flags)

Invokes the syscall recv. See ‘man 2 recv’ for more information.

Parameters:

• fd (int) – fd
• buf (void) – buf
• n (size_t) – n
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.recvfrom(fd, buf, n, flags, addr, addr_len)

Invokes the syscall recvfrom. See ‘man 2 recvfrom’ for more information.

Parameters:

• fd (int) – fd
• buf (void) – buf
• n (size_t) – n
• flags (int) – flags
• addr (SOCKADDR_ARG) – addr
• addr_len (socklen_t) – addr_len

pwnlib.shellcraft.amd64.linux.recvmmsg(fd, vmessages, vlen, flags, tmo)

Invokes the syscall recvmmsg. See ‘man 2 recvmmsg’ for more information.

Parameters:

• fd (int) – fd
• vmessages (mmsghdr) – vmessages
• vlen (unsigned) – vlen
• flags (int) – flags
• tmo (timespec) – tmo

pwnlib.shellcraft.amd64.linux.recvmsg(fd, message, flags)

Invokes the syscall recvmsg. See ‘man 2 recvmsg’ for more information.

Parameters:

• fd (int) – fd
• message (msghdr) – message
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.recvsize(sock, reg='rcx')

Recives 4 bytes size field Useful in conjuncion with findpeer and stager :param sock, the socket to read the payload from.: :param reg, the place to put the size: :type reg, the place to put the size: default ecx

Leaves socket in ebx

pwnlib.shellcraft.amd64.linux.remap_file_pages(start, size, prot, pgoff, flags)

Invokes the syscall remap_file_pages. See ‘man 2 remap_file_pages’ for more information.

Parameters:

• start (void) – start
• size (size_t) – size
• prot (int) – prot
• pgoff (size_t) – pgoff
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.rename(old, new)

Invokes the syscall rename. See ‘man 2 rename’ for more information.

Parameters:

• old (char) – old
• new (char) – new

pwnlib.shellcraft.amd64.linux.renameat(oldfd, old, newfd, new)

Invokes the syscall renameat. See ‘man 2 renameat’ for more information.

Parameters:

• oldfd (int) – oldfd
• old (char) – old
• newfd (int) – newfd
• new (char) – new

pwnlib.shellcraft.amd64.linux.rmdir(path)

Invokes the syscall rmdir. See ‘man 2 rmdir’ for more information.

Parameters:path (char) – path

pwnlib.shellcraft.amd64.linux.sched_get_priority_max(algorithm)

Invokes the syscall sched_get_priority_max. See ‘man 2 sched_get_priority_max’ for more information.

Parameters:algorithm (int) – algorithm

pwnlib.shellcraft.amd64.linux.sched_get_priority_min(algorithm)

Invokes the syscall sched_get_priority_min. See ‘man 2 sched_get_priority_min’ for more information.

Parameters:algorithm (int) – algorithm

pwnlib.shellcraft.amd64.linux.sched_getaffinity(pid, cpusetsize, cpuset)

Invokes the syscall sched_getaffinity. See ‘man 2 sched_getaffinity’ for more information.

Parameters:

• pid (pid_t) – pid
• cpusetsize (size_t) – cpusetsize
• cpuset (cpu_set_t) – cpuset

pwnlib.shellcraft.amd64.linux.sched_getparam(pid, param)

Invokes the syscall sched_getparam. See ‘man 2 sched_getparam’ for more information.

Parameters:

• pid (pid_t) – pid
• param (sched_param) – param

pwnlib.shellcraft.amd64.linux.sched_getscheduler(pid)

Invokes the syscall sched_getscheduler. See ‘man 2 sched_getscheduler’ for more information.

Parameters:pid (pid_t) – pid

pwnlib.shellcraft.amd64.linux.sched_rr_get_interval(pid, t)

Invokes the syscall sched_rr_get_interval. See ‘man 2 sched_rr_get_interval’ for more information.

Parameters:

• pid (pid_t) – pid
• t (timespec) – t

pwnlib.shellcraft.amd64.linux.sched_setaffinity(pid, cpusetsize, cpuset)

Invokes the syscall sched_setaffinity. See ‘man 2 sched_setaffinity’ for more information.

Parameters:

• pid (pid_t) – pid
• cpusetsize (size_t) – cpusetsize
• cpuset (cpu_set_t) – cpuset

pwnlib.shellcraft.amd64.linux.sched_setparam(pid, param)

Invokes the syscall sched_setparam. See ‘man 2 sched_setparam’ for more information.

Parameters:

• pid (pid_t) – pid
• param (sched_param) – param

pwnlib.shellcraft.amd64.linux.sched_setscheduler(pid, policy, param)

Invokes the syscall sched_setscheduler. See ‘man 2 sched_setscheduler’ for more information.

Parameters:

• pid (pid_t) – pid
• policy (int) – policy
• param (sched_param) – param

pwnlib.shellcraft.amd64.linux.sched_yield()

Invokes the syscall sched_yield. See ‘man 2 sched_yield’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.select(nfds, readfds, writefds, exceptfds, timeout)

Invokes the syscall select. See ‘man 2 select’ for more information.

Parameters:

• nfds (int) – nfds
• readfds (fd_set) – readfds
• writefds (fd_set) – writefds
• exceptfds (fd_set) – exceptfds
• timeout (timeval) – timeout

pwnlib.shellcraft.amd64.linux.sendfile(out_fd, in_fd, offset, count)

Invokes the syscall sendfile. See ‘man 2 sendfile’ for more information.

Parameters:

• out_fd (int) – out_fd
• in_fd (int) – in_fd
• offset (off_t) – offset
• count (size_t) – count

pwnlib.shellcraft.amd64.linux.sendfile64(out_fd, in_fd, offset, count)

Invokes the syscall sendfile64. See ‘man 2 sendfile64’ for more information.

Parameters:

• out_fd (int) – out_fd
• in_fd (int) – in_fd
• offset (off64_t) – offset
• count (size_t) – count

pwnlib.shellcraft.amd64.linux.setdomainname(name, length)

Invokes the syscall setdomainname. See ‘man 2 setdomainname’ for more information.

Parameters:

• name (char) – name
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.setgid(gid)

Invokes the syscall setgid. See ‘man 2 setgid’ for more information.

Parameters:gid (gid_t) – gid

pwnlib.shellcraft.amd64.linux.setgroups(n, groups)

Invokes the syscall setgroups. See ‘man 2 setgroups’ for more information.

Parameters:

• n (size_t) – n
• groups (gid_t) – groups

pwnlib.shellcraft.amd64.linux.sethostname(name, length)

Invokes the syscall sethostname. See ‘man 2 sethostname’ for more information.

Parameters:

• name (char) – name
• len (size_t) – len

pwnlib.shellcraft.amd64.linux.setitimer(which, new, old)

Invokes the syscall setitimer. See ‘man 2 setitimer’ for more information.

Parameters:

• which (itimer_which_t) – which
• new (itimerval) – new
• old (itimerval) – old

pwnlib.shellcraft.amd64.linux.setpgid(pid, pgid)

Invokes the syscall setpgid. See ‘man 2 setpgid’ for more information.

Parameters:

• pid (pid_t) – pid
• pgid (pid_t) – pgid

pwnlib.shellcraft.amd64.linux.setpriority(which, who, prio)

Invokes the syscall setpriority. See ‘man 2 setpriority’ for more information.

Parameters:

• which (priority_which_t) – which
• who (id_t) – who
• prio (int) – prio

pwnlib.shellcraft.amd64.linux.setregid(gid='egid')

Args: [gid (imm/reg) = egid] Sets the real and effective group id.

pwnlib.shellcraft.amd64.linux.setresgid(rgid, egid, sgid)

Invokes the syscall setresgid. See ‘man 2 setresgid’ for more information.

Parameters:

• rgid (gid_t) – rgid
• egid (gid_t) – egid
• sgid (gid_t) – sgid

pwnlib.shellcraft.amd64.linux.setresuid(ruid, euid, suid)

Invokes the syscall setresuid. See ‘man 2 setresuid’ for more information.

Parameters:

• ruid (uid_t) – ruid
• euid (uid_t) – euid
• suid (uid_t) – suid

pwnlib.shellcraft.amd64.linux.setreuid(uid='euid')

Args: [uid (imm/reg) = euid] Sets the real and effective user id.

pwnlib.shellcraft.amd64.linux.setrlimit(resource, rlimits)

Invokes the syscall setrlimit. See ‘man 2 setrlimit’ for more information.

Parameters:

• resource (rlimit_resource_t) – resource
• rlimits (rlimit) – rlimits

pwnlib.shellcraft.amd64.linux.setsid()

Invokes the syscall setsid. See ‘man 2 setsid’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.setsockopt(sockfd, level, optname, optval, optlen)

Invokes the syscall setsockopt. See ‘man 2 setsockopt’ for more information.

Parameters:

• sockfd (int) – sockfd
• level (int) – level
• optname (int) – optname
• optval (void) – optval
• optlen (int) – optlen

pwnlib.shellcraft.amd64.linux.setsockopt_timeout(sock, secs)

Invokes the syscall for setsockopt to set a timeout on a socket in seconds. See ‘man 2 setsockopt’ for more information.

Parameters:

• sock (int) – sock
• secs (int) – secs

pwnlib.shellcraft.amd64.linux.settimeofday(tv, tz)

Invokes the syscall settimeofday. See ‘man 2 settimeofday’ for more information.

Parameters:

• tv (timeval) – tv
• tz (timezone) – tz

pwnlib.shellcraft.amd64.linux.setuid(uid)

Invokes the syscall setuid. See ‘man 2 setuid’ for more information.

Parameters:uid (uid_t) – uid

pwnlib.shellcraft.amd64.linux.sh()

Execute a different process.

>>> p = run_assembly(shellcraft.amd64.linux.sh())
>>> p.sendline('echo Hello')
>>> p.recv()
'Hello\n'

pwnlib.shellcraft.amd64.linux.sigaction(sig, act, oact)

Invokes the syscall sigaction. See ‘man 2 sigaction’ for more information.

Parameters:

• sig (int) – sig
• act (sigaction) – act
• oact (sigaction) – oact

pwnlib.shellcraft.amd64.linux.sigaltstack(ss, oss)

Invokes the syscall sigaltstack. See ‘man 2 sigaltstack’ for more information.

Parameters:

• ss (sigaltstack) – ss
• oss (sigaltstack) – oss

pwnlib.shellcraft.amd64.linux.signal(sig, handler)

Invokes the syscall signal. See ‘man 2 signal’ for more information.

Parameters:

• sig (int) – sig
• handler (sighandler_t) – handler

pwnlib.shellcraft.amd64.linux.sigpending(set)

Invokes the syscall sigpending. See ‘man 2 sigpending’ for more information.

Parameters:set (sigset_t) – set

pwnlib.shellcraft.amd64.linux.sigprocmask(how, set, oset, sigsetsize)

Invokes the syscall sigprocmask. See ‘man 2 sigprocmask’ for more information.

Parameters:

• how (int) – how
• set (sigset_t) – set
• oset (sigset_t) – oset
• sigsetsize (size_t) – sigsetsize

pwnlib.shellcraft.amd64.linux.sigreturn()

Invokes the syscall sigreturn. See ‘man 2 sigreturn’ for more information.

pwnlib.shellcraft.amd64.linux.sigsuspend(set)

Invokes the syscall sigsuspend. See ‘man 2 sigsuspend’ for more information.

Parameters:set (sigset_t) – set

pwnlib.shellcraft.amd64.linux.socket(network='ipv4', proto='tcp')

Creates a new socket

pwnlib.shellcraft.amd64.linux.splice(fdin, offin, fdout, offout, length, flags)

Invokes the syscall splice. See ‘man 2 splice’ for more information.

Parameters:

• fdin (int) – fdin
• offin (off64_t) – offin
• fdout (int) – fdout
• offout (off64_t) – offout
• len (size_t) – len
• flags (unsigned) – flags

pwnlib.shellcraft.amd64.linux.stage(fd=0, length=None)

Migrates shellcode to a new buffer.

Parameters:

• fd (int) – Integer file descriptor to recv data from. Default is stdin (0).
• length (int) – Optional buffer length. If None, the first pointer-width of data received is the length.

Example

>>> p = run_assembly(shellcraft.stage())
>>> sc = asm(shellcraft.echo("Hello\n", constants.STDOUT_FILENO))
>>> p.pack(len(sc))
>>> p.send(sc)
>>> p.recvline()
'Hello\n'

pwnlib.shellcraft.amd64.linux.stager(sock, size, handle_error=False)

Recives a fixed sized payload into a mmaped buffer Useful in conjuncion with findpeer. After running the socket will be left in RDI. :param sock, the socket to read the payload from.: :param size, the size of the payload:

pwnlib.shellcraft.amd64.linux.stat(file, buf)

Invokes the syscall stat. See ‘man 2 stat’ for more information.

Parameters:

• file (char) – file
• buf (stat) – buf

pwnlib.shellcraft.amd64.linux.stat64(file, buf)

Invokes the syscall stat64. See ‘man 2 stat64’ for more information.

Parameters:

• file (char) – file
• buf (stat64) – buf

pwnlib.shellcraft.amd64.linux.stime(when)

Invokes the syscall stime. See ‘man 2 stime’ for more information.

Parameters:when (time_t) – when

pwnlib.shellcraft.amd64.linux.strace_dos()

Kills strace

pwnlib.shellcraft.amd64.linux.stty(fd, params)

Invokes the syscall stty. See ‘man 2 stty’ for more information.

Parameters:

• fd (int) – fd
• params (sgttyb) – params

pwnlib.shellcraft.amd64.linux.symlink(from_, to)

Invokes the syscall symlink. See ‘man 2 symlink’ for more information.

Parameters:

• from (char) – from
• to (char) – to

pwnlib.shellcraft.amd64.linux.symlinkat(from_, tofd, to)

Invokes the syscall symlinkat. See ‘man 2 symlinkat’ for more information.

Parameters:

• from (char) – from
• tofd (int) – tofd
• to (char) – to

pwnlib.shellcraft.amd64.linux.sync()

Invokes the syscall sync. See ‘man 2 sync’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.sync_file_range(fd, offset, count, flags)

Invokes the syscall sync_file_range. See ‘man 2 sync_file_range’ for more information.

Parameters:

• fd (int) – fd
• offset (off64_t) – offset
• count (off64_t) – count
• flags (unsigned) – flags

pwnlib.shellcraft.amd64.linux.syscall(syscall=None, arg0=None, arg1=None, arg2=None, arg3=None, arg4=None, arg5=None)

Args: [syscall_number, *args]

Does a syscall

Any of the arguments can be expressions to be evaluated by pwnlib.constants.eval().

Example

>>> print pwnlib.shellcraft.amd64.linux.syscall('SYS_execve', 1, 'rsp', 2, 0).rstrip()
    /* call execve(1, 'rsp', 2, 0) */
    xor r10d, r10d /* 0 */
    push (SYS_execve) /* 0x3b */
    pop rax
    push 1
    pop rdi
    push 2
    pop rdx
    mov rsi, rsp
    syscall
>>> print pwnlib.shellcraft.amd64.linux.syscall('SYS_execve', 2, 1, 0, -1).rstrip()
    /* call execve(2, 1, 0, -1) */
    push -1
    pop r10
    push (SYS_execve) /* 0x3b */
    pop rax
    push 2
    pop rdi
    push 1
    pop rsi
    cdq /* rdx=0 */
    syscall
>>> print pwnlib.shellcraft.amd64.linux.syscall().rstrip()
    /* call syscall() */
    syscall
>>> print pwnlib.shellcraft.amd64.linux.syscall('rax', 'rdi', 'rsi').rstrip()
    /* call syscall('rax', 'rdi', 'rsi') */
    /* setregs noop */
    syscall
>>> print pwnlib.shellcraft.amd64.linux.syscall('rbp', None, None, 1).rstrip()
    /* call syscall('rbp', ?, ?, 1) */
    mov rax, rbp
    push 1
    pop rdx
    syscall
>>> print pwnlib.shellcraft.amd64.linux.syscall(
...               'SYS_mmap', 0, 0x1000,
...               'PROT_READ | PROT_WRITE | PROT_EXEC',
...               'MAP_PRIVATE | MAP_ANONYMOUS',
...               -1, 0).rstrip()
    /* call mmap(0, 4096, 'PROT_READ | PROT_WRITE | PROT_EXEC', 'MAP_PRIVATE | MAP_ANONYMOUS', -1, 0) */
    push (MAP_PRIVATE | MAP_ANONYMOUS) /* 0x22 */
    pop r10
    push -1
    pop r8
    xor r9d, r9d /* 0 */
    push (SYS_mmap) /* 9 */
    pop rax
    xor edi, edi /* 0 */
    push (PROT_READ | PROT_WRITE | PROT_EXEC) /* 7 */
    pop rdx
    mov esi, 0x1010101 /* 4096 == 0x1000 */
    xor esi, 0x1011101
    syscall

pwnlib.shellcraft.amd64.linux.syslog(pri, fmt, vararg)

Invokes the syscall syslog. See ‘man 2 syslog’ for more information.

Parameters:

• pri (int) – pri
• fmt (char) – fmt
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.tee(fdin, fdout, length, flags)

Invokes the syscall tee. See ‘man 2 tee’ for more information.

Parameters:

• fdin (int) – fdin
• fdout (int) – fdout
• len (size_t) – len
• flags (unsigned) – flags

pwnlib.shellcraft.amd64.linux.time(timer)

Invokes the syscall time. See ‘man 2 time’ for more information.

Parameters:timer (time_t) – timer

pwnlib.shellcraft.amd64.linux.timer_create(clock_id, evp, timerid)

Invokes the syscall timer_create. See ‘man 2 timer_create’ for more information.

Parameters:

• clock_id (clockid_t) – clock_id
• evp (sigevent) – evp
• timerid (timer_t) – timerid

pwnlib.shellcraft.amd64.linux.timer_delete(timerid)

Invokes the syscall timer_delete. See ‘man 2 timer_delete’ for more information.

Parameters:timerid (timer_t) – timerid

pwnlib.shellcraft.amd64.linux.timer_getoverrun(timerid)

Invokes the syscall timer_getoverrun. See ‘man 2 timer_getoverrun’ for more information.

Parameters:timerid (timer_t) – timerid

pwnlib.shellcraft.amd64.linux.timer_gettime(timerid, value)

Invokes the syscall timer_gettime. See ‘man 2 timer_gettime’ for more information.

Parameters:

• timerid (timer_t) – timerid
• value (itimerspec) – value

pwnlib.shellcraft.amd64.linux.timer_settime(timerid, flags, value, ovalue)

Invokes the syscall timer_settime. See ‘man 2 timer_settime’ for more information.

Parameters:

• timerid (timer_t) – timerid
• flags (int) – flags
• value (itimerspec) – value
• ovalue (itimerspec) – ovalue

pwnlib.shellcraft.amd64.linux.truncate(file, length)

Invokes the syscall truncate. See ‘man 2 truncate’ for more information.

Parameters:

• file (char) – file
• length (off_t) – length

pwnlib.shellcraft.amd64.linux.truncate64(file, length)

Invokes the syscall truncate64. See ‘man 2 truncate64’ for more information.

Parameters:

• file (char) – file
• length (off64_t) – length

pwnlib.shellcraft.amd64.linux.ulimit(cmd, vararg)

Invokes the syscall ulimit. See ‘man 2 ulimit’ for more information.

Parameters:

• cmd (int) – cmd
• vararg (int) – vararg

pwnlib.shellcraft.amd64.linux.umask(mask)

Invokes the syscall umask. See ‘man 2 umask’ for more information.

Parameters:mask (mode_t) – mask

pwnlib.shellcraft.amd64.linux.uname(name)

Invokes the syscall uname. See ‘man 2 uname’ for more information.

Parameters:name (utsname) – name

pwnlib.shellcraft.amd64.linux.unlink(name)

Invokes the syscall unlink. See ‘man 2 unlink’ for more information.

Parameters:name (char) – name

pwnlib.shellcraft.amd64.linux.unlinkat(fd, name, flag)

Invokes the syscall unlinkat. See ‘man 2 unlinkat’ for more information.

Parameters:

• fd (int) – fd
• name (char) – name
• flag (int) – flag

pwnlib.shellcraft.amd64.linux.unshare(flags)

Invokes the syscall unshare. See ‘man 2 unshare’ for more information.

Parameters:flags (int) – flags

pwnlib.shellcraft.amd64.linux.ustat(dev, ubuf)

Invokes the syscall ustat. See ‘man 2 ustat’ for more information.

Parameters:

• dev (dev_t) – dev
• ubuf (ustat) – ubuf

pwnlib.shellcraft.amd64.linux.utime(file, file_times)

Invokes the syscall utime. See ‘man 2 utime’ for more information.

Parameters:

• file (char) – file
• file_times (utimbuf) – file_times

pwnlib.shellcraft.amd64.linux.utimensat(fd, path, times, flags)

Invokes the syscall utimensat. See ‘man 2 utimensat’ for more information.

Parameters:

• fd (int) – fd
• path (char) – path
• times (timespec) – times
• flags (int) – flags

pwnlib.shellcraft.amd64.linux.utimes(file, tvp)

Invokes the syscall utimes. See ‘man 2 utimes’ for more information.

Parameters:

• file (char) – file
• tvp (timeval) – tvp

pwnlib.shellcraft.amd64.linux.vfork()

Invokes the syscall vfork. See ‘man 2 vfork’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.vhangup()

Invokes the syscall vhangup. See ‘man 2 vhangup’ for more information.

Arguments:

pwnlib.shellcraft.amd64.linux.vmsplice(fdout, iov, count, flags)

Invokes the syscall vmsplice. See ‘man 2 vmsplice’ for more information.

Parameters:

• fdout (int) – fdout
• iov (iovec) – iov
• count (size_t) – count
• flags (unsigned) – flags

pwnlib.shellcraft.amd64.linux.wait4(pid, stat_loc, options, usage)

Invokes the syscall wait4. See ‘man 2 wait4’ for more information.

Parameters:

• pid (pid_t) – pid
• stat_loc (WAIT_STATUS) – stat_loc
• options (int) – options
• usage (rusage) – usage

pwnlib.shellcraft.amd64.linux.waitid(idtype, id, infop, options)

Invokes the syscall waitid. See ‘man 2 waitid’ for more information.

Parameters:

• idtype (idtype_t) – idtype
• id (id_t) – id
• infop (siginfo_t) – infop
• options (int) – options

pwnlib.shellcraft.amd64.linux.waitpid(pid, stat_loc, options)

Invokes the syscall waitpid. See ‘man 2 waitpid’ for more information.

Parameters:

• pid (pid_t) – pid
• stat_loc (int) – stat_loc
• options (int) – options

pwnlib.shellcraft.amd64.linux.write(fd, buf, n)

Invokes the syscall write. See ‘man 2 write’ for more information.

Parameters:

• fd (int) – fd
• buf (void) – buf
• n (size_t) – n

pwnlib.shellcraft.amd64.linux.writeloop(readsock=0, writesock=1)

Reads from a buffer of a size and location determined at runtime. When the shellcode is executing, it should send a pointer and pointer-width size to determine the location and size of buffer.

pwnlib.shellcraft.amd64.linux.writev(fd, iovec, count)

Invokes the syscall writev. See ‘man 2 writev’ for more information.

Parameters:

• fd (int) – fd
• iovec (iovec) – iovec
• count (int) – count