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multiboot2: Add stub support for relocation header tag

This commit is contained in:
mintsuki 2022-06-30 05:50:31 +02:00
parent 2b5f1039c2
commit 0fac035a34
1 changed files with 33 additions and 4 deletions
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33
common/protos/multiboot2.c
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@ -39,6 +39,7 @@ static size_t get_multiboot2_info_size(
ALIGN_UP(sizeof(struct multiboot_tag_old_acpi) + 20, MULTIBOOT_TAG_ALIGN) + // old ACPI info
ALIGN_UP(sizeof(struct multiboot_tag_elf_sections) + section_entry_size * section_num, MULTIBOOT_TAG_ALIGN) + // ELF info
ALIGN_UP(modules_size, MULTIBOOT_TAG_ALIGN) + // modules
ALIGN_UP(sizeof(struct multiboot_tag_load_base_addr), MULTIBOOT_TAG_ALIGN) + // load base address
ALIGN_UP(smbios_tag_size, MULTIBOOT_TAG_ALIGN) + // SMBIOS
ALIGN_UP(sizeof(struct multiboot_tag_basic_meminfo), MULTIBOOT_TAG_ALIGN) + // basic memory info
ALIGN_UP(sizeof(struct multiboot_tag_mmap) + sizeof(struct multiboot_mmap_entry) * 256, MULTIBOOT_TAG_ALIGN) + // MMAP
@ -97,6 +98,8 @@ bool multiboot2_load(char *config, char* cmdline) {
struct multiboot_header_tag_address *addresstag = NULL;
struct multiboot_header_tag_framebuffer *fbtag = NULL;
bool has_reloc_header = false;
bool is_new_acpi_required = false;
bool is_old_acpi_required = false;
@ -173,7 +176,11 @@ bool multiboot2_load(char *config, char* cmdline) {
case MULTIBOOT_HEADER_TAG_EFI_BS:
break;
default: panic(true, "multiboot2: Unknown header tag type");
case MULTIBOOT_HEADER_TAG_RELOCATABLE:
has_reloc_header = true;
break;
default: panic(true, "multiboot2: Unknown header tag type: %u\n");
}
}
@ -247,6 +254,14 @@ bool multiboot2_load(char *config, char* cmdline) {
}
}
// Get the load base address (AKA the lowest target in the ranges)
uint64_t load_base_addr = (uint64_t)-1;
for (size_t i = 0; i < ranges_count; i++) {
if (load_base_addr > ranges[i].target) {
load_base_addr = ranges[i].target;
}
}
size_t modules_size = 0;
size_t n_modules;
@ -348,6 +363,21 @@ bool multiboot2_load(char *config, char* cmdline) {
append_tag(info_idx, tag);
}
//////////////////////////////////////////////
// Create load base address tag
//////////////////////////////////////////////
if (has_reloc_header) {
uint32_t size = sizeof(struct multiboot_tag_load_base_addr);
struct multiboot_tag_load_base_addr *tag = (void *)(mb2_info + info_idx);
tag->type = MULTIBOOT_TAG_TYPE_LOAD_BASE_ADDR;
tag->size = size;
tag->load_base_addr = load_base_addr;
append_tag(info_idx, tag);
}
//////////////////////////////////////////////
// Create modules tag
//////////////////////////////////////////////
@ -463,7 +493,6 @@ bool multiboot2_load(char *config, char* cmdline) {
if (resolution != NULL)
parse_resolution(&req_width, &req_height, &req_bpp, resolution);
struct fb_info fbinfo;
if (!fb_init(&fbinfo, req_width, req_height, req_bpp)) {
#if bios == 1