tests: add basic multiboot2 test kernel

Signed-off-by: Andy-Python-Programmer <andypythonappdeveloper@gmail.com>
This commit is contained in:
Andy-Python-Programmer 2021-11-09 16:33:54 +11:00
parent 93cd5b1de3
commit 15cff010c3
No known key found for this signature in database
GPG Key ID: 80E0357347554B89
5 changed files with 256 additions and 3 deletions

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@ -14,6 +14,13 @@ INTERNALLDFLAGS := \
--no-dynamic-linker \
-ztext
INTERNALLDFLAGSMBOOT2 := \
-Tmultiboot2.ld \
-nostdlib \
-zmax-page-size=0x1000 \
-static \
--no-dynamic-linker \
INTERNALCFLAGS := \
-I../stivale \
-I. \
@ -29,13 +36,21 @@ INTERNALCFLAGS := \
-mno-sse2 \
-mno-red-zone
all: test.elf
all: test.elf multiboot2.elf
test.elf: stivale.o stivale2.o e9print.o memory.o
$(LD) $^ $(LDFLAGS) $(INTERNALLDFLAGS) -o $@
multiboot2.elf: multiboot2_trampoline.o
$(CC) $(CFLAGS) $(INTERNALCFLAGS) -I../stage23/protos -m32 -c multiboot2.c -o multiboot2.o
$(CC) $(CFLAGS) $(INTERNALCFLAGS) -m32 -c e9print.c -o e9print.o
$(LD) $^ multiboot2.o e9print.o $(LDFLAGS) $(INTERNALLDFLAGSMBOOT2) -m elf_i386 -o $@
%.o: %.c
$(CC) $(CFLAGS) $(INTERNALCFLAGS) -c $< -o $@
%.o: %.asm
nasm -felf32 $< -o $@
clean:
rm -rf test.elf stivale.o stivale2.o e9print.o memory.o
rm -rf test.elf stivale.o stivale2.o e9print.o memory.o multiboot2.o multiboot2.elf multiboot2_trampoline.o

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@ -1,4 +1,4 @@
DEFAULT_ENTRY=1
DEFAULT_ENTRY=2
TIMEOUT=3
GRAPHICS=yes
VERBOSE=yes
@ -21,6 +21,24 @@ KERNEL_CMDLINE=Woah! Another example!
MODULE_PATH=boot:///boot/bg.bmp
MODULE_STRING=yooooo
# Test that the module string provided to the kernel will be
# the module path since a module string is not specified.
# (cc CONFIG.md stivale2.`MODULE_STRING` section)
MODULE_PATH=boot:///boot/bg.bmp
:Multiboot2 Test
COMMENT=Test of the multiboot2 boot protocol.
PROTOCOL=multiboot2
RESOLUTION=800x600
KERNEL_PATH=boot:///boot/multiboot2.elf
KERNEL_CMDLINE=Woah! Another another example!
MODULE_PATH=boot:///boot/bg.bmp
MODULE_STRING=This is the background image!
# Test that this should be NULL:
MODULE_PATH=boot:///boot/bg.bmp
:EFI Chainloading

140
test/multiboot2.c Normal file
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@ -0,0 +1,140 @@
#include <e9print.h>
#include <stdint.h>
#include <multiboot2.h>
struct multiboot_info {
uint32_t size;
uint32_t reserved;
struct multiboot_tag *first;
};
void multiboot2_main(uint32_t magic, struct multiboot_info* mb_info_addr) {
if (magic != MULTIBOOT2_BOOTLOADER_MAGIC) {
e9_printf("multiboot2: Invalid magic: %x\n", magic);
goto out;
}
e9_printf("Welcome to the multiboot2 test kernel: ");
e9_printf("\t size=%d", mb_info_addr->size);
e9_printf("\t reserved=%d", mb_info_addr->reserved);
e9_print("\nTags:\n");
size_t add_size = 0;
// NOTE: We set i to 8 to skip size and reserved fields:
for (size_t i = 8; i < mb_info_addr->size; i += add_size) {
struct multiboot_tag *tag = (struct multiboot_tag *)((uint8_t *)mb_info_addr + i);
if (tag->type == MULTIBOOT_TAG_TYPE_END) {
break;
}
switch (tag->type) {
case MULTIBOOT_TAG_TYPE_CMDLINE: {
struct multiboot_tag_string *cmdline = (struct multiboot_tag_string *)tag;
e9_printf("\t cmdline:");
e9_printf("\t\t string=%s", cmdline->string);
break;
}
case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME: {
struct multiboot_tag_string *name = (struct multiboot_tag_string *)tag;
e9_printf("\t bootloader_name:");
e9_printf("\t\t string=%s", name->string);
break;
}
case MULTIBOOT_TAG_TYPE_MODULE: {
struct multiboot_tag_module *module = (struct multiboot_tag_module *)tag;
e9_printf("\t module:");
e9_printf("\t\t mod_start=%x", module->mod_start);
e9_printf("\t\t mod_end=%x", module->mod_end);
e9_printf("\t\t cmdline=%s", module->cmdline);
break;
}
case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO: {
struct multiboot_tag_basic_meminfo *meminfo = (struct multiboot_tag_basic_meminfo *)tag;
e9_printf("\t basic_meminfo:");
e9_printf("\t\t mem_lower=%x", meminfo->mem_lower);
e9_printf("\t\t mem_upper=%x", meminfo->mem_upper);
break;
}
// unimplemented(Andy-Python-Programmer): MULTIBOOT_TAG_TYPE_BOOTDEV
case MULTIBOOT_TAG_TYPE_MMAP: {
struct multiboot_tag_mmap *mmap = (struct multiboot_tag_mmap *)tag;
e9_printf("\t mmap:");
e9_printf("\t\t entry_size=%d", mmap->entry_size);
e9_printf("\t\t entry_version=%d", mmap->entry_version);
e9_printf("\t\t useable_entries:");
struct multiboot_mmap_entry *start = (struct multiboot_mmap_entry *)(mmap->entries);
struct multiboot_mmap_entry *end = (struct multiboot_mmap_entry *)(mmap->entries + mmap->size);
size_t total_mem = 0;
// For now we only print the useable memory map entries since
// printing the whole memory map blows my terminal up. We also
// iterate through the avaliable memory map entries and add up
// to find the total amount of useable memory.
for (struct multiboot_mmap_entry* entry = start; entry < end; entry++) {
if (entry->type != MULTIBOOT_MEMORY_AVAILABLE) {
continue;
}
e9_printf("\t\t\t addr=%x", entry->addr);
e9_printf("\t\t\t len=%x", entry->len);
e9_printf("\t\t\t type=%x", entry->type);
total_mem += entry->len;
}
e9_printf("Total usable memory: %x", total_mem);
break;
}
// unimplemented(Andy-Python-Programmer): MULTIBOOT_TAG_TYPE_VBE
case MULTIBOOT_TAG_TYPE_FRAMEBUFFER: {
struct multiboot_tag_framebuffer *fb = (struct multiboot_tag_framebuffer *)tag;
e9_printf("\t framebuffer:");
e9_printf("\t\t framebuffer_pitch: %x", fb->common.framebuffer_pitch);
e9_printf("\t\t framebuffer_width: %x", fb->common.framebuffer_width);
e9_printf("\t\t framebuffer_height: %x", fb->common.framebuffer_height);
e9_printf("\t\t framebuffer_bpp: %x", fb->common.framebuffer_bpp);
e9_printf("\t\t framebuffer_type: %x", fb->common.framebuffer_type);
e9_printf("\t\t framebuffer_adddress: %x", fb->common.framebuffer_addr);
switch (fb->common.framebuffer_type) {
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB: {
e9_printf("\t\t framebuffer_red_field_position: %x", fb->framebuffer_red_field_position);
e9_printf("\t\t framebuffer_red_mask_size: %x", fb->framebuffer_red_mask_size);
e9_printf("\t\t framebuffer_green_field_position: %x", fb->framebuffer_green_field_position);
e9_printf("\t\t framebuffer_green_mask_size: %x", fb->framebuffer_green_mask_size);
e9_printf("\t\t framebuffer_blue_field_position: %x", fb->framebuffer_blue_field_position);
e9_printf("\t\t framebuffer_blue_mask_size: %x", fb->framebuffer_blue_mask_size);
break;
}
// Rest are unimplemented(Andy-Python-Programmer):
}
break;
}
}
add_size = tag->size;
// Align the size to 8 bytes.
if ((add_size % 8) != 0)
add_size += (8 - add_size % 8);
}
out:
for (;;);
}

35
test/multiboot2.ld Normal file
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@ -0,0 +1,35 @@
ENTRY(_start)
SECTIONS {
. = 1M;
.boot :
{
/* Ensure that the multiboot header is at the beginning! */
*(.multiboot_header)
}
. = ALIGN(4K);
.text :
{
*(.text .text.*)
}
. = ALIGN(4K);
.rodata :
{
*(.rodata.*)
}
. = ALIGN(4K);
.data :
{
*(.data .data.*)
}
. = ALIGN(4K);
.bss :
{
*(.bss .bss.*)
}
}

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@ -0,0 +1,45 @@
extern multiboot2_main
global _start
section .multiboot_header
header_start:
dd 0xe85250d6 ; Magic number (multiboot 2)
dd 0 ; Architecture 0 (protected mode i386)
dd header_end - header_start ; Header length
dd 0x100000000 - (0xe85250d6 + 0 + (header_end - header_start)) ; Checksum
align 8
framebuffer_tag_start:
dw 5 ; type
dw 1 ; flags
dd framebuffer_tag_end - framebuffer_tag_start ; size
dd 800 ; width
dd 600 ; height
dd 32 ; depth
framebuffer_tag_end:
align 8
; Required end tag:
dw 0 ; type
dw 0 ; flags
dw 8 ; size
header_end:
section .text
bits 32
_start:
cli
mov esp, stack_top
push ebx
push eax
call multiboot2_main ; Jump to our multiboot test kernel
section .bss
stack_bottom:
resb 4096 * 16
stack_top: