mirror of
https://github.com/radareorg/radare2.git
synced 2024-10-10 12:24:20 +00:00
81727c9c28
* Some more fixes for r_egg - Use more tests cases - Warn when stackframe doesnt fits * Make t.sh unit test tool nicer - Accept option flags to show asm, disasm, .. * Add R2_PREFIX and R2_LIBDIR into r_util.vapi
422 lines
11 KiB
C
422 lines
11 KiB
C
/* pancake // nopcode.org 2010-2011 -- emit module for rcc */
|
|
|
|
#include <r_egg.h>
|
|
|
|
/* hardcoded */
|
|
#define attsyntax 0
|
|
|
|
#ifdef ARCH_X86_64
|
|
# define EMIT_NAME emit_x64
|
|
# define R_ARCH "x64"
|
|
# define R_SZ 8
|
|
# define R_SP "rsp"
|
|
# define R_BP "rbp"
|
|
# define R_AX "rax"
|
|
# define R_GP { "rax", "rbx", "rsi", "rdx" }
|
|
# define R_NGP 4
|
|
#else
|
|
# define EMIT_NAME emit_x86
|
|
# define R_ARCH "x86"
|
|
# define R_SZ 4
|
|
# define R_SP "esp"
|
|
# define R_BP "ebp"
|
|
# define R_AX "eax"
|
|
# define R_GP { "eax", "ebx", "ecx", "edx" }
|
|
# define R_NGP 4
|
|
#endif
|
|
|
|
static char *regs[] = R_GP;
|
|
|
|
static void emit_init (REgg *egg) {
|
|
// TODO: add 'andb rsp, 0xf0'
|
|
if (attsyntax) r_egg_printf (egg, "mov %esp, %ebp\n");
|
|
else r_egg_printf (egg, "mov ebp, esp\n");
|
|
}
|
|
|
|
static char *emit_syscall (REgg *egg, int nargs) {
|
|
char p[512];
|
|
if (attsyntax)
|
|
return strdup (": mov $`.arg`, %"R_AX"\n: int $0x80\n");
|
|
switch (egg->os) {
|
|
case R_EGG_OS_LINUX:
|
|
strcpy (p, "\n : mov eax, `.arg`\n : int 0x80\n");
|
|
break;
|
|
case R_EGG_OS_OSX:
|
|
case R_EGG_OS_MACOS:
|
|
case R_EGG_OS_DARWIN:
|
|
snprintf (p, sizeof (p),
|
|
"\n : mov eax, `.arg`\n : push eax\n : int 0x80\n : add esp, %d\n",
|
|
4); //(nargs+2)*(egg->bits/8));
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
return strdup (p);
|
|
}
|
|
|
|
static void emit_frame (REgg *egg, int sz) {
|
|
if (sz<1)
|
|
return;
|
|
if (attsyntax)
|
|
r_egg_printf (egg,
|
|
" push %%"R_BP"\n"
|
|
" mov %%"R_SP", %%"R_BP"\n"
|
|
" sub $%d, %%"R_SP"\n", sz);
|
|
else r_egg_printf (egg,
|
|
" push "R_BP"\n"
|
|
" mov "R_BP", "R_SP"\n"
|
|
" sub "R_SP", %d\n", sz);
|
|
}
|
|
|
|
static void emit_frame_end (REgg *egg, int sz, int ctx) {
|
|
if (sz>0) {
|
|
if (attsyntax) {
|
|
r_egg_printf (egg, " add $%d, %%"R_SP"\n", sz);
|
|
r_egg_printf (egg, " pop %%"R_BP"\n");
|
|
} else {
|
|
r_egg_printf (egg, " add "R_SP", %d\n", sz);
|
|
r_egg_printf (egg, " pop "R_BP"\n");
|
|
}
|
|
}
|
|
if (ctx>0)
|
|
r_egg_printf (egg, " ret\n");
|
|
}
|
|
|
|
static void emit_comment(REgg *egg, const char *fmt, ...) {
|
|
va_list ap;
|
|
char buf[1024];
|
|
va_start (ap, fmt);
|
|
vsnprintf (buf, sizeof (buf), fmt, ap);
|
|
if (attsyntax) r_egg_printf (egg, " /* %s */\n", buf);
|
|
else r_egg_printf (egg, "# %s\n", buf);
|
|
va_end (ap);
|
|
}
|
|
|
|
static void emit_equ (REgg *egg, const char *key, const char *value) {
|
|
r_egg_printf (egg, ".equ %s,%s\n", key, value);
|
|
}
|
|
|
|
static void emit_syscall_args(REgg *egg, int nargs) {
|
|
int j, k;
|
|
for (j=0; j<nargs; j++) {
|
|
k = j*R_SZ;
|
|
if (attsyntax)
|
|
r_egg_printf (egg, " mov %d(%%"R_SP"), %%%s\n", k, regs[j+1]);
|
|
else {
|
|
if (k>0)
|
|
r_egg_printf (egg, " mov %s, ["R_SP"+%d]\n", regs[j+1], k);
|
|
else if (k<0)
|
|
r_egg_printf (egg, " mov %s, ["R_SP"%d]\n", regs[j+1], k);
|
|
else r_egg_printf (egg, " mov %s, ["R_SP"]\n", regs[j+1]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void emit_string(REgg *egg, const char *dstvar, const char *str, int j) {
|
|
char *p, *s, str2[64];
|
|
int i, len, oj = j;
|
|
|
|
len = strlen (str);
|
|
s = malloc (len+4);
|
|
memcpy (s, str, len);
|
|
memset (s+len, 0, 4);
|
|
|
|
for (i=4; i<=oj; i+=4) {
|
|
/* XXX endian and 32/64bit issues */
|
|
int *n = (int *)(s+i-4);
|
|
p = r_egg_mkvar (egg, str2, dstvar, i);
|
|
if (attsyntax) r_egg_printf (egg, " movl $0x%x, %s\n", *n, p);
|
|
else r_egg_printf (egg, " mov %s, 0x%x\n", p, *n);
|
|
j -= 4;
|
|
}
|
|
/* zero */
|
|
p = r_egg_mkvar (egg, str2, dstvar, i);
|
|
if (attsyntax) r_egg_printf (egg, " movl $0, %s\n", p);
|
|
else r_egg_printf (egg, " mov %s, 0\n", p);
|
|
|
|
/* store pointer */
|
|
p = r_egg_mkvar (egg, str2, dstvar, j+4);
|
|
if (attsyntax) r_egg_printf (egg, " lea %s, %%"R_AX"\n", p);
|
|
else r_egg_printf (egg, " lea "R_AX", %s\n", p);
|
|
p = r_egg_mkvar (egg, str2, dstvar, 0);
|
|
if (attsyntax) r_egg_printf (egg, " mov %%"R_AX", %s\n", p);
|
|
else r_egg_printf (egg, " mov %s, "R_AX"\n", p);
|
|
#if 0
|
|
char *p, str2[64];
|
|
int i, oj = j;
|
|
for (i=0; i<oj; i+=4) {
|
|
/* XXX endian and 32/64bit issues */
|
|
int *n = (int *)(str+i);
|
|
p = r_egg_mkvar (egg, str2, dstvar, j);
|
|
if (attsyntax) r_egg_printf (egg, " movl $0x%x, %s\n", *n, p);
|
|
else r_egg_printf (egg, " mov %s, 0x%x\n", p, *n);
|
|
j -= 4;
|
|
}
|
|
p = r_egg_mkvar (egg, str2, dstvar, oj);
|
|
if (attsyntax) r_egg_printf (egg, " lea %s, %%"R_AX"\n", p);
|
|
else r_egg_printf (egg, " lea "R_AX", %s\n", p);
|
|
p = r_egg_mkvar (egg, str2, dstvar, 0);
|
|
if (attsyntax) r_egg_printf (egg, " mov %%"R_AX", %s\n", p);
|
|
else r_egg_printf (egg, " mov %s, "R_AX"\n", p);
|
|
#endif
|
|
free (s);
|
|
}
|
|
|
|
static void emit_call(REgg *egg, const char *str, int atr) {
|
|
if (atr) {
|
|
if (attsyntax) r_egg_printf (egg, " call *%s\n", str);
|
|
else r_egg_printf (egg, " call [%s]\n", str);
|
|
} else r_egg_printf (egg, " call %s\n", str);
|
|
}
|
|
|
|
static void emit_jmp(REgg *egg, const char *str, int atr) {
|
|
if (atr) {
|
|
if (attsyntax) r_egg_printf (egg, " jmp *%s\n", str);
|
|
else r_egg_printf (egg, " jmp [%s]\n", str);
|
|
} else r_egg_printf (egg, " jmp %s\n", str);
|
|
}
|
|
|
|
static void emit_arg (REgg *egg, int xs, int num, const char *str) {
|
|
int d = atoi (str);
|
|
if (!attsyntax && (*str=='$'))
|
|
str = str +1;
|
|
switch (xs) {
|
|
case 0:
|
|
r_egg_printf (egg, " push %s\n", str);
|
|
break;
|
|
case '*':
|
|
if (attsyntax) r_egg_printf (egg, " push (%s)\n", str);
|
|
else r_egg_printf (egg, " push [%s]\n", str);
|
|
break;
|
|
case '&':
|
|
if (attsyntax) {
|
|
if (d != 0) r_egg_printf (egg, " addl $%d, %%"R_BP"\n", d);
|
|
r_egg_printf (egg, " pushl %%"R_BP"\n");
|
|
if (d != 0) r_egg_printf (egg, " subl $%d, %%"R_BP"\n", d);
|
|
} else {
|
|
if (d != 0) r_egg_printf (egg, " add "R_BP", %d\n", d);
|
|
r_egg_printf (egg, " push "R_BP"\n");
|
|
if (d != 0) r_egg_printf (egg, " sub "R_BP", %d\n", d);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void emit_get_result(REgg *egg, const char *ocn) {
|
|
if (attsyntax) r_egg_printf (egg, " mov %%"R_AX", %s\n", ocn);
|
|
else r_egg_printf (egg, " mov %s, "R_AX"\n", ocn);
|
|
}
|
|
|
|
static void emit_restore_stack (REgg *egg, int size) {
|
|
if (attsyntax) r_egg_printf (egg, " add $%d, %%"R_SP" /* args */\n", size);
|
|
else r_egg_printf (egg, " add "R_SP", %d\n", size);
|
|
}
|
|
|
|
static void emit_get_while_end (REgg *egg, char *str, const char *ctxpush, const char *label) {
|
|
sprintf (str, " push %s\n jmp %s\n", ctxpush, label);
|
|
}
|
|
|
|
static void emit_while_end (REgg *egg, const char *labelback) {
|
|
#if 0
|
|
if (attsyntax) {
|
|
r_egg_printf (egg, " pop %%"R_AX"\n");
|
|
r_egg_printf (egg, " cmp $0, %%"R_AX"\n"); // XXX MUST SUPPORT != 0 COMPARE HERE
|
|
r_egg_printf (egg, " jnz %s\n", labelback);
|
|
} else {
|
|
#endif
|
|
r_egg_printf (egg, " pop "R_AX"\n");
|
|
r_egg_printf (egg, " test "R_AX", "R_AX"\n"); // XXX MUST SUPPORT != 0 COMPARE HERE
|
|
r_egg_printf (egg, " jnz %s\n", labelback);
|
|
// }
|
|
}
|
|
|
|
// XXX: this is wrong
|
|
static void emit_get_var (REgg *egg, int type, char *out, int idx) {
|
|
switch (type) {
|
|
case 0: /* variable */
|
|
if (idx>0) sprintf (out, "["R_BP"+%d]", idx);
|
|
else if (idx<0) sprintf (out, "["R_BP"%d]", idx);
|
|
else strcpy (out, "["R_BP"]");
|
|
break;
|
|
case 1: /* argument */
|
|
// OMG WE CANT stuff found in relative address in stack in the stack
|
|
eprintf ("WARNING: Using stack vars in naked functions\n");
|
|
idx = 8; // HACK to make arg0, arg4, ... work
|
|
if (idx>0) sprintf (out, "["R_SP"+%d]", idx);
|
|
else if (idx<0) sprintf (out, "["R_SP"%d]", idx);
|
|
else strcpy (out, "["R_SP"]");
|
|
break;
|
|
case 2:
|
|
if (idx>0) sprintf (out, "["R_BP"+%d]", idx);
|
|
else if (idx<0) sprintf (out, "["R_BP"%d]", idx);
|
|
else strcpy (out, "["R_BP"]");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void emit_trap (REgg *egg) {
|
|
r_egg_printf (egg, " int3\n");
|
|
}
|
|
|
|
static void emit_load_ptr(REgg *egg, const char *dst) {
|
|
int d = atoi (dst);
|
|
if (d == 0) { // hack to handle stackvarptrz
|
|
char *p = strchr (dst, '+');
|
|
if (p) d = atoi (p+1);
|
|
}
|
|
//eprintf ("emit_load_ptr: HACK\n");
|
|
// XXX: 32/64bit care
|
|
//r_egg_printf (egg, "# DELTA IS (%s)\n", dst);
|
|
if (attsyntax) r_egg_printf (egg, " leal %d(%%"R_BP"), %%"R_AX"\n", d);
|
|
else r_egg_printf (egg, " lea "R_AX", ["R_BP"+%d]\n", d);
|
|
//r_egg_printf (egg, " movl %%"R_BP", %%"R_AX"\n");
|
|
//r_egg_printf (egg, " addl $%d, %%"R_AX"\n", d);
|
|
}
|
|
|
|
static void emit_branch(REgg *egg, char *b, char *g, char *e, char *n, int sz, const char *dst) {
|
|
char *p, str[64];
|
|
char *arg = NULL;
|
|
char *op = "jz";
|
|
int signed_value = 1; // XXX: add support for signed/unsigned variables
|
|
/* NOTE that jb/ja are inverted to fit cmp opcode */
|
|
if (b) {
|
|
*b = '\0';
|
|
if (signed_value) {
|
|
if (e) op = "jge";
|
|
else op = "jg";
|
|
} else {
|
|
if (e) op = "jae";
|
|
else op = "ja";
|
|
}
|
|
arg = b+1;
|
|
} else
|
|
if (g) {
|
|
*g = '\0';
|
|
if (signed_value) {
|
|
if (e) op = "jle";
|
|
else op = "jl";
|
|
} else {
|
|
if (e) op = "jbe";
|
|
else op = "jb";
|
|
}
|
|
arg = g+1;
|
|
}
|
|
if (arg == NULL) {
|
|
if (e) {
|
|
arg = e+1;
|
|
op = "jne";
|
|
} else {
|
|
arg = attsyntax? "$0": "0";
|
|
if (n) op = "jnz";
|
|
else op ="jz";
|
|
}
|
|
}
|
|
|
|
if (*arg=='=') arg++; /* for <=, >=, ... */
|
|
p = r_egg_mkvar (egg, str, arg, 0);
|
|
if (attsyntax) {
|
|
r_egg_printf (egg, " pop %%"R_AX"\n"); /* TODO: add support for more than one arg get arg0 */
|
|
r_egg_printf (egg, " cmp%c %s, %%"R_AX"\n", sz, p);
|
|
} else {
|
|
r_egg_printf (egg, " pop "R_AX"\n"); /* TODO: add support for more than one arg get arg0 */
|
|
r_egg_printf (egg, " cmp "R_AX", %s\n", p);
|
|
}
|
|
// if (context>0)
|
|
r_egg_printf (egg, " %s %s\n", op, dst);
|
|
}
|
|
|
|
static void emit_load(REgg *egg, const char *dst, int sz) {
|
|
if (attsyntax) {
|
|
switch (sz) {
|
|
case 'l':
|
|
r_egg_printf (egg, " movl %s, %%"R_AX"\n", dst);
|
|
r_egg_printf (egg, " movl (%%"R_AX"), %%"R_AX"\n");
|
|
case 'b':
|
|
r_egg_printf (egg, " movl %s, %%"R_AX"\n", dst);
|
|
r_egg_printf (egg, " movzb (%%"R_AX"), %%"R_AX"\n");
|
|
break;
|
|
default:
|
|
// TODO: unhandled?!?
|
|
r_egg_printf (egg, " mov%c %s, %%"R_AX"\n", sz, dst);
|
|
r_egg_printf (egg, " mov%c (%%"R_AX"), %%"R_AX"\n", sz);
|
|
}
|
|
} else {
|
|
switch (sz) {
|
|
case 'l':
|
|
r_egg_printf (egg, " mov "R_AX", %s\n", dst);
|
|
r_egg_printf (egg, " mov "R_AX", ["R_AX"]\n");
|
|
case 'b':
|
|
r_egg_printf (egg, " mov "R_AX", %s\n", dst);
|
|
r_egg_printf (egg, " movz "R_AX", ["R_AX"]\n");
|
|
break;
|
|
default:
|
|
// TODO: unhandled?!?
|
|
r_egg_printf (egg, " mov "R_AX", %s\n", dst);
|
|
r_egg_printf (egg, " mov "R_AX", ["R_AX"]\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void emit_mathop(REgg *egg, int ch, int vs, int type, const char *eq, const char *p) {
|
|
char *op;
|
|
switch(ch) {
|
|
case '^': op = "xor"; break;
|
|
case '&': op = "and"; break;
|
|
case '|': op = "or"; break;
|
|
case '-': op = "sub"; break;
|
|
case '+': op = "add"; break;
|
|
case '*': op = "mul"; break;
|
|
case '/': op = "div"; break;
|
|
default: op = "mov"; break;
|
|
}
|
|
if (attsyntax) {
|
|
if (eq == NULL) eq = "%"R_AX;
|
|
if (p == NULL) p = "%"R_AX;
|
|
r_egg_printf (egg, " %s%c %c%s, %s\n", op, vs, type, eq, p);
|
|
} else {
|
|
if (eq == NULL) eq = R_AX;
|
|
if (p == NULL) p = R_AX;
|
|
// TODO:
|
|
#if 0
|
|
eprintf ("TYPE = %c\n", type);
|
|
eprintf (" %s%c %c%s, %s\n", op, vs, type, eq, p);
|
|
eprintf (" %s %s, [%s]\n", op, p, eq);
|
|
#endif
|
|
if (type == '*') r_egg_printf (egg, " %s %s, [%s]\n", op, p, eq);
|
|
else r_egg_printf (egg, " %s %s, %s\n", op, p, eq);
|
|
}
|
|
}
|
|
|
|
static const char* emit_regs(REgg *egg, int idx) {
|
|
return regs[idx%R_NGP];
|
|
}
|
|
|
|
REggEmit EMIT_NAME = {
|
|
.retvar = R_AX,
|
|
.arch = R_ARCH,
|
|
.size = R_SZ,
|
|
.init = emit_init,
|
|
.jmp = emit_jmp,
|
|
.call = emit_call,
|
|
.equ = emit_equ,
|
|
.regs = emit_regs,
|
|
//.sc = emit_sc,
|
|
.trap = emit_trap,
|
|
.frame = emit_frame,
|
|
.frame_end = emit_frame_end,
|
|
.comment = emit_comment,
|
|
.push_arg = emit_arg,
|
|
.restore_stack = emit_restore_stack,
|
|
.get_result = emit_get_result,
|
|
.syscall_args = emit_syscall_args,
|
|
.set_string = emit_string,
|
|
.get_var = emit_get_var,
|
|
.while_end = emit_while_end,
|
|
.get_while_end = emit_get_while_end,
|
|
.branch = emit_branch,
|
|
.load = emit_load,
|
|
.load_ptr = emit_load_ptr,
|
|
.mathop = emit_mathop,
|
|
.syscall = emit_syscall,
|
|
};
|