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a few more tags, just printing

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This commit is contained in:
Benji Dial 2019-12-26 20:50:57 -05:00
parent 3353bdaf2b
commit 1f309e75b8
1 changed files with 70 additions and 9 deletions
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79
src/kernel/main.c
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@ -26,7 +26,7 @@ OF THIS SOFTWARE.
enum tag_type {
BOOT_COMMAND = 0x00000001,
LOADER_NAME = 0x00000002,
BOOT_MODULES = 0x00000003,
BOOT_MODULE = 0x00000003,
MEMORY_INFO = 0x00000004,
BOOT_DEVICE = 0x00000005,
MEMORY_MAP = 0x00000006,
@ -113,9 +113,24 @@ struct fbuf_rgb_info {
uint8_t blue_mask;
} __attribute__ ((__packed__));
struct elf_tag {
uint16_t count;
uint16_t size;
uint16_t shndx;
uint16_t padding;
} __attribute__ ((__packed__));
struct module_tag {
uint32_t start;
uint32_t end;
uint8_t argument[1];
} __attribute__ ((__packed__));
struct boot_device_tag boot_device;
bool have_boot_device = false;
bool have_mmap = false;
uint32_t text_base;
bool have_text_base;
enum error_codes {
NO_BOOT_DEVICE = 0x00000000,
@ -137,11 +152,29 @@ uint32_t main(void) {
put_32_hex(tag_pointer->size);
switch (tag_pointer->type) {
case BOOT_COMMAND:
put_sz(": boot arguments\n ");
put_sz(*(uint8_t *)(tag_pointer + 1) ?
(uint8_t *)(tag_pointer + 1) : "No arguments");
break;
case LOADER_NAME:
put_sz(": bootloader name\n ");
put_sz((uint8_t *)(tag_pointer + 1));
break;
case BOOT_MODULE:
put_sz(": boot module\n Loaded at: 0x");
struct module_tag *module = (struct module_tag *)(tag_pointer + 1);
put_32_hex(module->start);
put_sz(" - ");
put_32_hex(module->end - 1);
if (*module->argument) {
put_sz("\n Argument: ");
put_sz(module->argument);
}
break;
case MEMORY_INFO:
put_sz(": memory size\n Lower memory: 0x");
put_32_hex((tag_pointer + 1)->type);
@ -273,7 +306,7 @@ uint32_t main(void) {
struct fbuf_tag *fbuf_info = (struct fbuf_tag *)(tag_pointer + 1);
put_sz(": framebuffer information\n Address: 0x");
put_32_hex(fbuf_info->address_high);
put_char(':');
put_char('.');
put_32_hex(fbuf_info->address_low);
put_sz("\n Pitch: ");
put_32_dec(fbuf_info->pitch);
@ -309,9 +342,23 @@ uint32_t main(void) {
break;
}
case ELF_SYMBOLS: {
struct elf_tag *tag = (struct elf_tag *)(tag_pointer + 1);
struct elf_shdr *p = (struct elf_shdr *)(tag + 1);
put_sz(": ELF shdr table\n shndx: 0x");
put_16_hex(tag->shndx);
if (tag->count)
for (uint32_t i = 0; i < tag->count; ++i) {
;//TODO
p = (struct elf_shdr *)((uint32_t)p + tag->size);
}
break;
}
case IMAGE_BASE_ADDR:
put_sz(": image address\n 0x");
put_32_hex(*(uint32_t *)(tag_pointer + 1));
put_32_hex(text_base = *(uint32_t *)(tag_pointer + 1));
have_text_base = true;
break;
default:
@ -326,12 +373,26 @@ uint32_t main(void) {
if (!have_mmap)
return NO_MMAP;
put_sz("\n\nReady!\n Memory map size: 0x");
put_32_hex(sizeof(struct mmap_entry) * MMAP_SIZE);
put_sz("\n Process table size: 0x");
put_32_hex(sizeof(struct proc_info) * 65536);
put_sz("\n File table size: 0x");
put_32_hex(sizeof(struct file_info) * 65536);
put_sz("\n\nImportant locations:");
if (have_text_base) {
put_sz("\n Text section: 0x");
put_32_hex(text_base);
}
put_sz("\n Memory map: 0x");
put_32_hex((uint32_t)mmap_bss);
put_sz(" - 0x");
put_32_hex((uint32_t)mmap_bss - 1 +
sizeof(struct mmap_entry) * MMAP_SIZE);
put_sz("\n Process table: 0x");
put_32_hex((uint32_t)proc_table);
put_sz(" - 0x");
put_32_hex((uint32_t)proc_table - 1 +
sizeof(struct proc_info) * 65536);
put_sz("\n File table: 0x");
put_32_hex((uint32_t)file_table);
put_sz(" - 0x");
put_32_hex((uint32_t)file_table - 1 +
sizeof(struct file_info) * 65536);
put_sz("\n\n");
put_sz("No file support yet. Halting.");