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Reduce dynamic allocation #4

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Reduce dynamic allocation #4

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a6ff82c
Remove an unused variable.
Smattr Jul 29, 2016
d919d39
Reduce memory allocation very slightly.
Smattr Jul 29, 2016
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7 changes: 5 additions & 2 deletions inject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -104,7 +104,10 @@ _mmap_data(int pid, size_t len, void *base_address, int protections, int flags,
long shellcode_len = ftell(f);
CHECK(shellcode_len > 0, "ftell error");
// align shellcode size to 32/64-bit boundary
long shellcode_len_aligned = shellcode_len + (sizeof(void*) - (shellcode_len % sizeof(void*)));
long shellcode_len_aligned = shellcode_len;
if (shellcode_len % sizeof(void*) != 0) {
shellcode_len_aligned += sizeof(void*) - shellcode_len % sizeof(void*);
}
CHECK(fseek(f, 0, SEEK_SET) == 0, "fseek error");
shellcode = malloc(shellcode_len_aligned);
memset(shellcode, 0x90, shellcode_len_aligned); // fill with NOPs
Expand Down Expand Up @@ -242,7 +245,7 @@ _launch_payload(int pid, void *code_cave, size_t code_cave_size, void *stack_add
int
inject_code(int pid, unsigned char *payload, size_t payload_len)
{
int ret = 0, status = 0;
int ret = 0;
void *payload_addr = NULL,
*stack = NULL,
*code_cave = NULL,
Expand Down