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d2b6828bab
* Do not prompt or clear screen when using V in batch mode * Optimization in r_config_get_i * Show expression in r_num_calc errors * Fix parsing of $$+2 in r_num_calc
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/* radare - LGPL - Copyright 2011-2012 // pancake<nopcode.org> */
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#include <r_core.h>
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R_API void r_core_hack_help(RCore *core) {
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eprintf ("wao [op] ; performs a modification on current opcode\n"
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" nop : replace current opcode with\n"
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" jz : make current opcode conditional (zero)\n"
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" jnz : make current opcode conditional (not zero)\n"
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" un-cjmp : remove conditional operation to branch\n"
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" swap-cjmp : swap conditional branch\n"
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"NOTE: those operations are only implemented for x86 atm. (TODO)\n");
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}
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// TODO: needs refactoring to make it cross-architecture
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R_API int r_core_hack(RCore *core, const char *op) {
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ut8 *b = core->block;
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RAnalOp analop;
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if (strstr (r_config_get (core->config, "asm.arch"), "x86"))
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eprintf ("TODO: write hacks are only for x86\n");
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if (!r_anal_op (core->anal, &analop, core->offset, core->block, core->blocksize)) {
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eprintf ("anal op fail\n");
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return R_FALSE;
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}
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if (!strcmp (op, "nop")) {
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int nopsize = 1; // XXX x86 only
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const char *nopcode = "90"; // XXX x86 only
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int len = analop.length;
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if (len%nopsize) {
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eprintf ("Invalid nopcode length\n");
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return R_FALSE;
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}
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r_cons_puts ("wx ");
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do r_cons_puts (nopcode);
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while (len-=nopsize);
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r_cons_puts ("\n");
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return R_TRUE;
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} else
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if (!strcmp (op, "jz")) {
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if (b[0] == 0x75) {
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r_cons_puts ("wx 74\n");
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return R_TRUE;
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} else eprintf ("Current opcode is not conditional\n");
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} else
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if (!strcmp (op, "jnz")) {
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if (b[0] == 0x74) {
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r_cons_puts ("wx 75\n");
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return R_TRUE;
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} else eprintf ("Current opcode is not conditional\n");
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return R_TRUE;
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} else
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if (!strcmp (op, "un-cjmp")) {
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if (b[0] >= 0x70 && b[0] <= 0x7f) {
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r_cons_puts ("wx eb\n");
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return R_TRUE;
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} else eprintf ("Current opcode is not conditional\n");
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} else
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if (!strcmp (op, "swap-cjmp")) {
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if (b[0] == 0x74)
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r_cons_puts ("wx 75\n");
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else
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if (b[0] == 0x75)
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r_cons_puts ("wx 74\n");
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else eprintf ("Invalid opcode\n");
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// XXX. add support for jb, jg, jl, ..
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} else eprintf ("Invalid operation\n");
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return R_FALSE;
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}
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