Add syscall support for LoongArch64

Author: xtexx

pwnlib/shellcraft/templates/loong64/linux/syscall.asm

@@ -14,90 +14,48 @@ Any of the arguments can be expressions to be evaluated by :func:`pwnlib.constan
 Example:
 
         >>> print(pwnlib.shellcraft.loong64.linux.syscall('SYS_execve', 1, 'sp', 2, 0).rstrip())
-            /* call execve(1, 'sp', 2, 0) */
-            c.li a0, 1
-            c.mv a1, sp
-            c.li a2, 2
-            c.li a3, 0
-            /* mv a7, 0xdd */
-            xori a7, zero, 0x722
-            xori a7, a7, 0x7ff
-            ecall
+            addi.d   $a0, $r0, 1
+            addi.d   $a1, $sp, 0
+            addi.d   $a2, $r0, 2
+            addi.d   $a3, $r0, 0
+            addi.d   $a7, $r0, 221
+            syscall
         >>> print(pwnlib.shellcraft.loong64.linux.syscall('SYS_execve', 2, 1, 0, 20).rstrip())
-            /* call execve(2, 1, 0, 0x14) */
-            c.li a0, 2
-            c.li a1, 1
-            c.li a2, 0
-            c.li a3, 0x14
-            /* mv a7, 0xdd */
-            xori a7, zero, 0x722
-            xori a7, a7, 0x7ff
-            ecall
+            addi.d   $a0, $r0, 2
+            addi.d   $a1, $r0, 1
+            addi.d   $a2, $r0, 0
+            addi.d   $a3, $r0, 20
+            addi.d   $a7, $r0, 221
+            syscall
         >>> print(pwnlib.shellcraft.loong64.linux.syscall().rstrip())
-            /* call syscall() */
-            ecall
+            syscall
         >>> print(pwnlib.shellcraft.loong64.linux.syscall('a7', 'a0', 'a1').rstrip())
-            /* call syscall('a7', 'a0', 'a1') */
-            /* setregs noop */
-            ecall
+            syscall
         >>> print(pwnlib.shellcraft.loong64.linux.syscall('a3', None, None, 1).rstrip())
-            /* call syscall('a3', ?, ?, 1) */
-            c.li a2, 1
-            c.mv a7, a3
-            ecall
+            addi.d   $a2, $r0, 1
+            addi.d   $a7, $a3, 0
+            syscall
         >>> print(pwnlib.shellcraft.loong64.linux.syscall(
         ...               'SYS_mmap', 0, 0x1000,
         ...               'PROT_READ | PROT_WRITE | PROT_EXEC',
         ...               'MAP_PRIVATE',
         ...               -1, 0).rstrip())
-            /* call mmap(0, 0x1000, 'PROT_READ | PROT_WRITE | PROT_EXEC', 'MAP_PRIVATE', -1, 0) */
-            c.li a0, 0
-            c.lui a1, 1 /* mv a1, 0x1000 */
-            c.li a2, 7
-            c.li a3, 2
-            c.li a4, 0xffffffffffffffff
-            c.li a5, 0
-            /* mv a7, 0xde */
-            xori a7, zero, 0x721
-            xori a7, a7, 0x7ff
-            ecall
-        >>> print(pwnlib.shellcraft.openat('AT_FDCWD', '/home/pwn/flag').rstrip())
-            /* openat(fd='AT_FDCWD', file='/home/pwn/flag', oflag=0) */
-            /* push b'/home/pwn/flag\x00' */
-            li t4, 0x77702f656d6f682f
-            sd t4, -16(sp)
-            li t4, 0x67616c662f6e
-            sd t4, -8(sp)
-            addi sp, sp, -16
-            c.mv a1, sp
-            xori a0, zero, 0xffffffffffffff9c
-            c.li a2, 0
-            /* call openat() */
-            /* mv a7, 0x38 */
-            xori a7, zero, 0x7c7
-            xori a7, a7, 0x7ff
-            ecall
+            addi.d   $a0, $r0, 0
+            addi.d   $a1, $r0, 1
+            lu52i.d  $a1, $a1, 0
+            addi.d   $a2, $r0, 7
+            addi.d   $a3, $r0, 2
+            addi.d   $a4, $r0, 15
+            lu52i.d  $a4, $a4, -1
+            lu52i.d  $a4, $a4, -1
+            lu52i.d  $a4, $a4, -1
+            lu52i.d  $a4, $a4, -1
+            lu52i.d  $a4, $a4, -1
+            addi.d   $a5, $r0, 0
+            addi.d   $a7, $r0, 222
+            syscall
 </%docstring>
 <%
-  if isinstance(syscall, (str, text_type, Constant)) and str(syscall).startswith('SYS_'):
-      syscall_repr = str(syscall)[4:] + "(%s)"
-      args = []
-  else:
-      syscall_repr = 'syscall(%s)'
-      if syscall is None:
-          args = ['?']
-      else:
-          args = [pretty(syscall, False)]
-
-  for arg in [arg0, arg1, arg2, arg3, arg4, arg5]:
-      if arg is None:
-          args.append('?')
-      else:
-          args.append(pretty(arg, False))
-  while args and args[-1] == '?':
-      args.pop()
-  syscall_repr = syscall_repr % ', '.join(args)
-
   registers = abi.register_arguments
   arguments = [syscall, arg0, arg1, arg2, arg3, arg4, arg5]
   regctx    = dict(zip(registers, arguments))