Well basically nothing really works I guess

I've worked quite a while on several small things which I didn't commit but I'm going away for a week (holiday) soooo I synced these useless and dumb files :)

1 files changed, 64 insertions, 0 deletions

diff --git a/src/kernel/fs/elfloader.c b/src/kernel/fs/elfloader.c
new file mode 100644
index 0000000..5b81a5e
--- /dev/null
+++ b/src/kernel/fs/elfloader.c
@@ -0,0 +1,64 @@
+#include <kernel/fs/elf.h>
+#include <kernel/lib/stdio.h>
+#include <kernel/memory/alloc.h>
+#include <kernel/lib/lib.h>
+#include <kernel/memory/paging.h>
+#include "load.h"
+
+elf_priv_data *elf_probe(uint8_t *buf)
+{
+    elf_header_t *header = (elf_header_t *) buf;
+    /* The first four bytes are 0x7f and 'ELF' */
+    if (header->e_ident[0] == 0x7f &&
+        header->e_ident[1] == 'E' && header->e_ident[2] == 'L' && header->e_ident[3] == 'F') {
+        /* Valid ELF! */
+        serial_printf("Buffer is valid ELF file!");
+        return (void *) 1;
+    }
+    return 0;
+}
+
+uint8_t elf_start(uint8_t *buf)
+{
+    elf_header_t *header = (elf_header_t *) buf;
+    serial_printf("Type: %s%s%s",
+                  header->e_ident[4] == 1 ? "32bit " : "64 bit",
+                  header->e_ident[5] == 1 ? "Little Endian " : "Big endian ",
+                  header->e_ident[6] == 1 ? "True ELF " : "buggy ELF ");
+    if (header->e_type != 2) {
+        serial_printf("File is not executable!");
+        return 0;
+    }
+    /* Map the virtual space */
+    uint32_t phys_loc = loader_get_unused_load_location();
+    uint32_t cr3 = kmalloc(4096);
+    /* Find first program header and loop through them */
+    elf_program_header_t *ph = (elf_program_header_t *) (buf + header->e_phoff);
+    for (int i = 0; i < header->e_phnum; i++, ph++) {
+        switch (ph->p_type) {
+            case 0: /* NULL */
+                break;
+            case 1: /* LOAD */
+                serial_printf("LOAD: offset 0x%x vaddr 0x%x paddr 0x%x filesz 0x%x memsz 0x%x",
+                              ph->p_offset, ph->p_vaddr, ph->p_paddr, ph->p_filesz, ph->p_memsz);
+                paging_map(phys_loc, ph->p_vaddr, PT_PRESENT | PT_RW | PT_USED);
+                memcpy(ph->p_vaddr, buf + ph->p_offset, ph->p_filesz);
+                break;
+            default: /* @TODO add more */
+                serial_printf("Unsupported p_type! Bail out!");
+                return 0;
+        }
+    }
+
+    return 0;//START("elf32", header->e_entry);
+}
+
+void elf_init()
+{
+    loader_t *elfloader = (loader_t *) kmalloc(sizeof(loader_t));
+    elfloader->name = "ELF32";
+    elfloader->probe = (void *) elf_probe;
+    elfloader->start = (void *) elf_start;
+    register_loader(elfloader);
+    // _kill();
+}
\ No newline at end of file