public/emcyfra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

WIP

Browse Source
This commit is contained in:
Kris Kwiatkowski 2025-02-17 23:46:39 +00:00
parent 113fed4ae1
commit e392f01c65
4 changed files with 48 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
Makefile
View File

@ -1,6 +1,6 @@
all:
arm-none-eabi-gcc -r -Tlibpqscheme.ld -fPIC -nostartfiles -o libpqscheme_test.elf libpqscheme_test.c -Iruntime_mps2/out/an386/pack/include
arm-none-eabi-gcc -mcpu=Cortex-M4 -Truntime_mps2/out/an386/pack/lib/mps2.ld -nostartfiles -o runner.elf runner.c -Lruntime_mps2/out/an386/pack/lib -lmps2-an386_runtime -Iruntime_mps2/out/an386/pack/include
arm-none-eabi-gcc -ggdb -mcpu=Cortex-M4 -mthumb -r -Tlibpqscheme.ld -fPIC -nostartfiles -o libpqscheme_test.elf libpqscheme_test.c -Iruntime_mps2/out/an386/pack/include
arm-none-eabi-gcc -ggdb -mcpu=Cortex-M4 -mthumb -Truntime_mps2/out/an386/pack/lib/mps2.ld -nostartfiles -o runner.elf runner.c -Lruntime_mps2/out/an386/pack/lib -lmps2-an386_runtime -Iruntime_mps2/out/an386/pack/include
arm-none-eabi-ar rcs runner runner.elf
arm-none-eabi-objcopy -O binary libpqscheme_test.elf libpqscheme_test.bin
@ -11,8 +11,11 @@ run:
-cpu cortex-m4 \
-nographic \
-kernel runner.elf \
-initrd libpqscheme_test.elf \
-semihosting
-semihosting \
-device loader,file=libpqscheme_test.elf,addr=0x00300000
# -S -gdb tcp::1234
# -monitor unix:/tmp/qemu-monitor,server,nowait
clean:
rm -rf *.o *.a *.elf *.bin

13
libpqscheme.ld
View File

@ -1,18 +1,25 @@
MEMORY
{
FLASH (rx) : ORIGIN = 0x00300000, LENGTH = 0x00100000 /* Runner */
RAM (rwx) : ORIGIN = 0x00000000, LENGTH = 16K
}
SECTIONS
{
.magic_header : {
LONG(0x88DAD0F2) /* Magic header containing */
LONG(ADDR(.text)) /* Entry point */
LONG(0x88DAD0F3) /* Magic header containing */
LONG(ADDR(.magic_header)) /* Entry point */
} > RAM
.text : {
*(.text)
*(.rodata)
} > RAM
} > FLASH
.data : {
KEEP(*(.magic_number)) /* Ensure the magic number is kept */
LONG(ADDR(.text) + 4) /* Entry point */
*(.data)
} > RAM
}

9
libpqscheme_test.c
View File

@ -1,14 +1,7 @@
#include <platform/printf.h>
#include <stdint.h>
__attribute__((section(".magic_number"))) volatile const uint32_t magic_number =
0xDEADBEEF; // Prevent optimization
__attribute__((
section(".magic_number1"))) volatile const uint32_t magic_number1 =
0xDEADBEEA; // Prevent optimization
__attribute__((section(".text"))) int cryptographic_test() {
static const uint32_t vv = 0xDEADBEEF;
// Run unit tests for cryptographic scheme
//while(1); // Debug loop
return 7;

40
runner.c
View File

@ -2,28 +2,46 @@
#include <platform/printf.h>
#include <stdint.h>
#define RAM_START 0x20000000
#define RAM_END RAM_START + 0x00400000
#define LIB_MAGIC 0xDEADBEEFu
#define RAM_START 0x00300000
#define RAM_END RAM_START + 0x00800000
#define LIB_MAGIC 0x88DAD0F2
typedef int (*func_t)(void);
typedef int (*func_t)();
void execute_library_function() {
printf("Scanning RAM...\n");
volatile uint32_t *ptr = (uint32_t *)RAM_START;
uint32_t *ptr = (uint32_t *)RAM_START;
while ((uint32_t)ptr < RAM_END) {
if (*ptr == LIB_MAGIC) {
printf("Found libpqscheme_test!\n");
uint32_t entry_point = *(ptr + 4);
printf("%X\n", entry_point);
entry_point += 4;
printf("%X\n", entry_point);
printf("Found libpqscheme_test 0x%X!\n", ptr);
printf("1>...%X 0x%X\n", ptr + 1, *(ptr + 1));
printf("2>...%X 0x%X\n", ptr + 2, *(ptr + 2));
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) {
printf("Try exec...%X\n", entry_point);
printf("Try exec...0x%X 0x%X\n", entry_point,
0x20000034 + 0x10);
printf(">> %d\n", test_func());
}
*/
uint32_t entry_point = 0x300044 | 1;
func_t test_func = (func_t)entry_point;
printf("> Entry point\n", entry_point);
int res = test_func();
printf(">> %d\n", res);
return;
}
ptr++;