Move os_dep out of the jitter module

1 files changed, 78 insertions, 0 deletions

diff --git a/miasm2/os_dep/linux_stdlib.py b/miasm2/os_dep/linux_stdlib.py
new file mode 100644
index 00000000..9dbc6c60
--- /dev/null
+++ b/miasm2/os_dep/linux_stdlib.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+#-*- coding:utf-8 -*-
+
+from sys import stdout
+from string import printable
+
+
+def xxx_isprint(jitter):
+    '''
+    #include <ctype.h>
+    int isprint(int c);
+
+    checks for any printable character including space.
+    '''
+    ret_addr, (c,)  = jitter.func_args_stdcall(1)
+    ret = chr(c & 0xFF) in printable and 1 or 0
+    return jitter.func_ret_stdcall(ret_addr, ret)
+
+
+def xxx_memcpy(jitter):
+    '''
+    #include <string.h>
+    void *memcpy(void *dest, const void *src, size_t n);
+
+    copies n bytes from memory area src to memory area dest.
+    '''
+    ret_addr, (dest, src, n) = jitter.func_args_stdcall(3)
+    jitter.vm.set_mem(dest, jitter.vm.get_mem(src, n))
+    return jitter.func_ret_stdcall(ret_addr, dest)
+
+
+def xxx_puts(jitter):
+    '''
+    #include <stdio.h>
+    int puts(const char *s);
+
+    writes the string s and a trailing newline to stdout.
+    '''
+    ret_addr, (s,) = jitter.func_args_stdcall(1)
+    while True:
+        c = jitter.vm.get_mem(s, 1)
+        s += 1
+        if c == '\x00':
+            break
+        stdout.write(c)
+    stdout.write('\n')
+    return jitter.func_ret_stdcall(ret_addr, 1)
+
+
+def xxx_snprintf(jitter):
+    '''
+    #include <stdio.h>
+    int snprintf(char *str, size_t size, const char *format, ...);
+
+    writes to string str according to format format and at most size bytes.
+    '''
+    ret_addr, (str, size, format) = jitter.func_args_stdcall(3)
+    curarg, output = 3, ''
+    while True:
+        c = jitter.vm.get_mem(format, 1)
+        format += 1
+        if c == '\x00':
+            break
+        if c == '%':
+            token = '%'
+            while True:
+                c = jitter.vm.get_mem(format, 1)
+                format += 1
+                token += c
+                if c in '%cdfsux':
+                    break
+            c = token % jitter.get_arg_n_stdcall(curarg)
+            curarg += 1
+        output += c
+    output = output[:size - 1]
+    ret = len(output)
+    jitter.vm.set_mem(str, output + '\x00')
+    return jitter.func_ret_stdcall(ret_addr, ret)