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rgimad
2025-05-31 11:37:06 +03:00
parent 6bd80d9c25
commit c8699adf66
1 changed files with 5 additions and 5 deletions
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10
kpack_c.c
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@@ -49,7 +49,7 @@ unsigned pack_lzma(unsigned char *infile, unsigned char *outfile, unsigned insiz
unsigned preprocess_calltrick(unsigned char *infile, unsigned insize, unsigned char ct1[256], unsigned *ctn, unsigned char *cti) unsigned preprocess_calltrick(unsigned char *infile, unsigned insize, unsigned char ct1[256], unsigned *ctn, unsigned char *cti)
{ {
unsigned char *buf = malloc(2*insize); unsigned char *buf = malloc(2*insize); // TODO WHERE it is used?
if (buf == NULL) { if (buf == NULL) {
goto pack_calltrick_fail; goto pack_calltrick_fail;
} }
@@ -70,17 +70,17 @@ unsigned preprocess_calltrick(unsigned char *infile, unsigned insize, unsigned c
break; break;
} }
unsigned num; unsigned num;
memcpy(&num, infile_ptr, 4); memcpy(&num, infile_ptr, 4); // read relative jump/call offset
infile_ptr += 4; infile_ptr += 4;
num += (infile_ptr - infile); num += (infile_ptr - infile); // convert it to global offset inside file
if (num >= insize || num >= 0x1000000) { // xxx: if (num >= insize || num >= 0x1000000) { // xxx:
infile_ptr -= 4; infile_ptr -= 4;
ct1[*infile_ptr] = 1; ct1[*infile_ptr] = 1;
} else { } else {
count -= 4; count -= 4;
num = byteswap(num); num = byteswap(num);
memcpy(infile_ptr - 4, &num, 4); memcpy(infile_ptr - 4, &num, 4); // substitute jmp/call offset with global offset
(*ctn)++; (*ctn)++; // update substitution counter
memcpy(buf_ptr, &infile_ptr, sizeof(buf_ptr)); memcpy(buf_ptr, &infile_ptr, sizeof(buf_ptr));
buf_ptr += sizeof(buf_ptr); buf_ptr += sizeof(buf_ptr);
} }