justin/jsix_import
1
0
Fork 0
Code Issues 1 Pull Requests Actions Packages Projects Releases Wiki Activity

[kernel] Improve process init

Browse Source 
Move process init from each process needing a main.s with _start to
crt0.s in libc. Also change to a sysv-like initial stack with a
j6-specific array of initialization values after the program arguments.
This commit is contained in:
Justin C. Miller
2020-12-31 00:57:51 -08:00
parent db8a14720b
commit 0e6b27e741
8 changed files with 148 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/drivers/fb/main.cpp
View File

@@ -1,25 +1,16 @@
#include <stdint.h>
#include <stdlib.h>
#include "j6/types.h"
#include "j6/init.h"
#include "j6/errors.h"
#include "j6/signals.h"
#include "j6/types.h"
#include <j6libc/syscalls.h>
extern "C" {
void _init_libc(j6_process_init *);
int main(int, const char **);
}
j6_handle_t sys = j6_handle_invalid;
size_t size = 0;
void
_init_libc(j6_process_init *init)
{
sys = init->handles[0];
size = reinterpret_cast<size_t>(init->handles[1]);
void _get_init(size_t *initc, struct j6_init_value **initv);
}
int
@@ -27,12 +18,25 @@ main(int argc, const char **argv)
{
_syscall_system_log("fb driver starting");
if (size == 0)
size_t initc = 0;
j6_init_value *initv = nullptr;
_get_init(&initc, &initv);
j6_init_framebuffer *fb = nullptr;
for (unsigned i = 0; i < initc; ++i) {
if (initv[i].type == j6_init_desc_framebuffer) {
fb = reinterpret_cast<j6_init_framebuffer*>(initv[i].value);
break;
}
}
if (!fb)
return 1;
uint32_t *fb = reinterpret_cast<uint32_t*>(0x100000000);
uint32_t *fbp = reinterpret_cast<uint32_t*>(fb->addr);
size_t size = fb->size;
for (size_t i=0; i < size/4; ++i) {
fb[i] = 0xff;
fbp[i] = 0xff;
}
_syscall_system_log("fb driver done, exiting");