github/sparrow-kata-full
1
0
Fork 0
mirror of https://github.com/AmbiML/sparrow-kata-full.git synced 2025-09-25 22:59:20 +00:00
Code Issues Projects Releases Wiki Activity

Merge "apps: Extract crt0 from C apps"

Browse Source 
GitOrigin-RevId: af8b6e41c39a9d5d0b85cb5f7b66d986e1bc3cf9
This commit is contained in:
June Tate-Gans
2022-08-30 17:33:53 +00:00
committed by Sam Leffler
parent 13799ab779
commit 6ee08d8b47
17 changed files with 408 additions and 200 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
apps/c/hello/hello.c
View File

@@ -9,62 +9,14 @@
// using the seL4_DebugPutChar syscall and is intended as a starting
// point for low-level tests.
#include <kernel/gen_config.h>
#include <sel4/arch/syscalls.h>
#include <stdarg.h>
#include <stdint.h>
__thread seL4_IPCBuffer *__sel4_ipc_buffer;
char minisel_tls[4096] __attribute__((__aligned__(4096)));
__attribute__((naked)) void _start() {
asm volatile(
".option push \n"
".option norelax \n"
"la gp, __global_pointer$ \n"
"la tp, minisel_tls \n"
"lui t1,0 \n"
"add t1,t1,tp \n"
"sw a0,0(t1) # __sel4_ipc_buffer>\n"
"addi sp,sp,-16 \n"
"sw a0, 12(sp) \n"
"sw a1, 8(sp) \n"
"sw a2, 4(sp) \n"
"sw a3, 0(sp) \n"
".option pop \n"
"j main \n");
}
// only prints 32-bit "%x" hex values
void minisel_printf(const char *fmt, ...) {
#if CONFIG_PRINTING
va_list args;
va_start(args, fmt);
for (; *fmt; fmt++) {
if (*fmt == '%') {
fmt++;
if (*fmt == 'x') {
uint32_t arg = va_arg(args, uint32_t);
for (int i = 7; i >= 0; i--) {
int n = (arg >> (4 * i)) & 0xF;
seL4_DebugPutChar(n > 9 ? 'A' + n - 10 : '0' + n);
}
}
} else {
seL4_DebugPutChar(*fmt);
}
}
va_end(args);
#endif
}
#include <kata.h>
int main(int a0, int a1, int a2, int a3) {
minisel_printf("\nI am a C app!\n");
minisel_printf("a0 %x a1 %x a2 %x a3 %x\n", a0, a1, a2, a3);
minisel_printf("__sel4_ipc_buffer %x\n", __sel4_ipc_buffer);
debug_printf("\nI am a C app!\n");
debug_printf("a0 %x a1 %x a2 %x a3 %x\n", a0, a1, a2, a3);
debug_printf("__sel4_ipc_buffer %x\n", __sel4_ipc_buffer);
minisel_printf("Done, sleeping in WFI loop\n");
debug_printf("Done, sleeping in WFI loop\n");
while (1) {
asm("wfi");
}