mirror of
https://github.com/radareorg/radare2.git
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147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
/* RAR-VM assembler/disassembler by pancake for radare with love */
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/* this implementation is licensed under LGPLv3 - 2012 */
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#include <stdio.h>
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#include <string.h>
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// XXX little endian only?
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/* helpers */
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#define eprintf(x,...) fprintf(stderr,x,##__VA_ARGS__)
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#define SKIPSPACES(x) if (x) while (*x==' '||*x=='\t') x++
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static const char *skipspaces(const char *x) { SKIPSPACES(x); return x; }
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//static const char *regs = "r0\x00r1\x00r2\x00r3\x00r4\x00r5\x00r6\x00r7";
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//static const char *getregi(int n) { return (n>=0&&n<=7)? regs+(3*n): "r?"; }
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static int getreg(const char *s) {
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if (s[0]=='r' && s[2]=='\0') {
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int n = s[1]-'0';
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if (n<8) return n;
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}
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return -1;
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}
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// ugly global vars
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typedef struct {
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int bits;
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unsigned char *out;
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} Bitbuf;
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//static void clrbit(Bitbuf *bb) { memset (bb->out, 0, 1+(bb->bits/8)); }
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static int bitget(Bitbuf *bb, int bit) {
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if (bit>=bb->bits) return -1;
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return (bb->out[bit/8] & (1<<((bit%8))))? 1: 0;
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}
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static void bitadd(Bitbuf *bb, unsigned int v, int n) {
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int i, b, bit;
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for (i=0; i<n; i++, bb->bits++) {
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b = (bb->bits+i)/8;
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bit = (bb->bits+i)%8;
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//printf ("[%d].%d = %d\n", b, bit, v& (1<<(n-i-1)));
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if (!bit) bb->out[b] = 0;
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//printf ("BIT (%d)\n", n-i-1);
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//if (v&(1<<(n-i-1))) bb->out[b] |= 1<<bit;
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if (v&(1<<(n-i-1))) bb->out[b] |= 1<<bit;
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// printf ("%d", oz);
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}
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//printf ("\n");
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}
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#define T_BYTE (1<<2)
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#define T_JUMP (1<<3)
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#define T_PROC (1<<4)
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#define NOPS 53
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static struct {
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const char *name;
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int flags;
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} opcodes [NOPS] = {
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{ "mov", 3|T_BYTE },
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{ "cmp", 3|T_BYTE },
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{ "add", 3|T_BYTE },
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{ "sub", 1|T_BYTE },
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{ "jz", 1|T_JUMP },
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{ "jnz", 1|T_JUMP },
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{ "inc", 1|T_BYTE },
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{ "dec", 1|T_BYTE },
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{ "jmp", 1|T_JUMP },
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{ "xor", 3|T_BYTE },
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{ "and", 3|T_BYTE },
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{ "or", 3|T_BYTE },
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{ "test", 3|T_BYTE },
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{ "js", 1|T_JUMP },
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{ "jb", 1|T_JUMP },
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{ "jbe", 1|T_JUMP },
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{ "ja", 1|T_JUMP },
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{ "jae", 1|T_JUMP },
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{ "push", 1 },
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{ "pop", 1 },
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{ "call", 1|T_PROC },
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{ "ret", T_PROC },
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{ "not", 1|T_BYTE },
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{ "shl", 3|T_BYTE },
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{ "shr", 3|T_BYTE },
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{ "sar", 3|T_BYTE },
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{ "neg", 1|T_BYTE },
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{ "pusha",0 },
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{ "popa", 0 },
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{ "pushf",0 },
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{ "popf", 0 },
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{ "movzx",3 },
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{ "movsx",3 },
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{ "xchg", 3|T_BYTE },
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{ "mul", 3|T_BYTE },
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{ "div", 3|T_BYTE },
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{ "adc", 3|T_BYTE },
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{ "sbb", 3|T_BYTE },
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{ "print",0 },
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{ "movb", 0 },
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{ "movd", 0 },
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{ "cmpb", 0 },
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{ "cmpd", 0 },
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{ "addb", 0 },
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{ "addd", 0 },
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{ "subb", 0 },
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{ "subd", 0 },
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{ "incb", 0 },
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{ "incd", 0 },
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{ "decb", 0 },
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{ "decd", 0 },
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{ "negb", 0 },
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{ "negd", 0 },
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};
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#if 0
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static int bitnum (Bitbuf *bb, int n, int c) {
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int i, ret = 0;
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if (n<bb->bits)
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for (i=0; i<c; i++)
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if (bitget (bb, n+i)>0)
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ret |= (1<<i);
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return ret;
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}
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#else
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static int bitnum (Bitbuf *bb, int n, int c) {
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int i, ret = 0;
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if (n<bb->bits)
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for (i=0; i<c; i++)
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if (bitget (bb, n+i)>0)
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ret |= (1<<(c-i-1));
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return ret;
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}
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#endif
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static inline const char *opcode_str (int n) {
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if (n>=0 && n<NOPS)
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return opcodes[n].name;
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return NULL;
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}
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static inline int opcode_num (const char *s) {
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int i;
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for (i=0; opcodes[i].name; i++)
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if (!strcmp (s, opcodes[i].name))
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return i;
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return -1;
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}
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