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This commit is contained in:
Kris Kwiatkowski 2025-02-18 08:24:27 +00:00
parent e2c86a90f4
commit 71667ebd7c
3 changed files with 5 additions and 28 deletions
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2
libpqscheme.ld
View File

@ -9,8 +9,6 @@ SECTIONS
.magic_header : { .magic_header : {
LONG(0x88DAD0F2) /* Magic header containing */ LONG(0x88DAD0F2) /* Magic header containing */
LONG(ADDR(.text)) /* Entry point */ LONG(ADDR(.text)) /* Entry point */
LONG(0x88DAD0F3) /* Magic header containing */
LONG(ADDR(.magic_header)) /* Entry point */
} > RAM } > RAM
.text : { .text : {

1
libpqscheme_test.c
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@ -1,7 +1,6 @@
#include <stdint.h> #include <stdint.h>
__attribute__((section(".text"))) int cryptographic_test() { __attribute__((section(".text"))) int cryptographic_test() {
static const uint32_t vv = 0xDEADBEEF;
// Run unit tests for cryptographic scheme // Run unit tests for cryptographic scheme
//while(1); // Debug loop //while(1); // Debug loop
return 7; return 7;

30
runner.c
View File

@ -11,37 +11,17 @@ typedef int (*func_t)();
void execute_library_function() { void execute_library_function() {
printf("Scanning RAM...\n"); printf("Scanning RAM...\n");
uint32_t *ptr = (uint32_t *)RAM_START; uint32_t *ptr = (uint32_t *)RAM_START;
uint32_t entry_point;
while ((uint32_t)ptr < RAM_END) { while ((uint32_t)ptr < RAM_END) {
if (*ptr == LIB_MAGIC) { if (*ptr == LIB_MAGIC) {
printf("Found libpqscheme_test 0x%X!\n", ptr); printf("Found libpqscheme_test 0x%X!\n", ptr);
entry_point = RAM_START + (*(ptr + 1));
printf("1>...%X 0x%X\n", ptr + 1, *(ptr + 1)); entry_point |= 1;
printf("2>...%X 0x%X\n", ptr + 2, *(ptr + 2)); func_t test_func = (func_t)(entry_point);
printf("3>...%X 0x%X\n", ptr + 3, *(ptr + 3));
for (size_t i = 0; i < 20; i++) {
printf("%X %2X \n", (((uint8_t *)ptr) + i),
*(((uint8_t *)ptr) + i));
}
/*
uint32_t entry_point = *((uint32_t *)(ptr + 0x10));
uint8_t *p = (uint8_t *)entry_point;
printf("\n");
func_t test_func = (func_t)entry_point;
if (test_func) { if (test_func) {
printf("Try exec...0x%X 0x%X\n", entry_point, printf("Result: %d\n", test_func());
0x20000034 + 0x10);
printf(">> %d\n", test_func());
} }
*/
uint32_t entry_point = (0x20000000 + 0x44) | 1;
func_t test_func = (func_t)entry_point;
printf("> Entry point\n", entry_point);
int res = test_func();
printf(">> %d\n", res);
return; return;
} }
ptr++; ptr++;