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https://git.suyu.dev/suyu/breakpad.git
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2b4274afc4
is no reason not to keep it locally. Implemented a basic disassembler which can be used to scan bytecode for interesting conditions. This should be pretty easy to add to for things other than exploitability if there is a desire. This also adds several tests to the windows exploitability ranking code to take advantage of the disassembler for x86 code. BUG=None TEST=DisassemblerX86Test.* Review URL: http://breakpad.appspot.com/203001 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@705 4c0a9323-5329-0410-9bdc-e9ce6186880e
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
#include "qword.h"
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#include "x86_imm.h"
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#include <stdio.h>
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unsigned int x86_imm_signsized( unsigned char * buf, size_t buf_len,
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void *dest, unsigned int size ) {
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signed char *cp = (signed char *) dest;
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signed short *sp = (signed short *) dest;
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int32_t *lp = (int32_t *) dest;
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qword_t *qp = (qword_t *) dest;
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if ( size > buf_len ) {
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return 0;
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}
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/* Copy 'size' bytes from *buf to *op
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* return number of bytes copied */
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switch (size) {
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case 1: /* BYTE */
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*cp = *((signed char *) buf);
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break;
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case 2: /* WORD */
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*sp = *((signed short *) buf);
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break;
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case 6:
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case 8: /* QWORD */
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*qp = *((qword_t *) buf);
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break;
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case 4: /* DWORD */
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default:
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*lp = *((int32_t *) buf);
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break;
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}
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return (size);
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}
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unsigned int x86_imm_sized( unsigned char * buf, size_t buf_len, void *dest,
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unsigned int size ) {
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unsigned char *cp = (unsigned char *) dest;
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unsigned short *sp = (unsigned short *) dest;
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uint32_t *lp = (uint32_t *) dest;
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qword_t *qp = (qword_t *) dest;
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if ( size > buf_len ) {
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return 0;
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}
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/* Copy 'size' bytes from *buf to *op
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* return number of bytes copied */
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switch (size) {
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case 1: /* BYTE */
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*cp = *((unsigned char *) buf);
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break;
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case 2: /* WORD */
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*sp = *((unsigned short *) buf);
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break;
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case 6:
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case 8: /* QWORD */
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*qp = *((qword_t *) buf);
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break;
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case 4: /* DWORD */
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default:
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*lp = *((uint32_t *) buf);
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break;
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}
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return (size);
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}
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