working userland with some invoke syscalls

1 files changed, 38 insertions, 0 deletions

diff --git a/boot/limine/limine.c b/boot/limine/limine.c
new file mode 100644
index 0000000..6a1bb43
--- /dev/null
+++ b/boot/limine/limine.c
@@ -0,0 +1,38 @@
+#include "limine.h"
+#include "boot.h"
+#include "string.h"
+
+char s_kernel_stack_initial[8192];
+
+char *jove_bootargs;
+int jove_bootargs_len;
+
+struct limine_kernel_file_request s_kernel_file_req = {
+    .id = LIMINE_KERNEL_FILE_REQUEST
+};
+
+void
+_start(void)
+{
+    __asm__ volatile("movq %0, %%rsp":: "r"((uintptr_t)&s_kernel_stack_initial + 8191));
+
+    struct limine_kernel_file_response *kernel_file_response = s_kernel_file_req.response;
+    jove_bootargs = kernel_file_response->kernel_file->cmdline;
+    jove_bootargs_len = strlen(jove_bootargs);
+
+    //Zero all spaces in bootargs not enclosed with quotes.
+    for(char *c = jove_bootargs; *c; c++) {
+        if(*c == '"') {
+            *c = 0;
+            for(++c; *c && *c != '"'; c++);
+            *(c++) = 0;
+            continue;
+        }
+        if(*c == ' ') *c = 0;
+    }
+
+    extern void _jove_main(void);
+
+    __asm__ volatile("movq $0, %%rbp"::);
+    _jove_main();
+}