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misc: Misc EFI-related adjustments

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This commit is contained in:
mintsuki 2021-05-20 01:16:39 +02:00
parent 40e65eddb1
commit 110d2dc7d4
9 changed files with 38 additions and 39 deletions
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13
stage23/entry.s3.c
View File

@ -23,19 +23,16 @@
void stage3_common(void);
#if defined (uefi)
EFI_STATUS EFIAPI efi_main(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {
__attribute__((naked))
EFI_STATUS efi_main(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {
// Invalid return address of 0 to end stacktraces here
asm volatile (
asm (
"push 0\n\t"
"push 0\n\t"
"xor eax, eax\n\t"
"jmp uefi_entry\n\t"
:
: "D" (ImageHandle), "S" (SystemTable)
: "memory"
);
__builtin_unreachable();
(void)ImageHandle; (void)SystemTable;
}
__attribute__((noreturn))
@ -66,7 +63,7 @@ void uefi_entry(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {
&loaded_image);
if (status) {
panic("HandleProtocol failure (%x)\n", status);
panic("HandleProtocol failure (%x)", status);
}
boot_volume = disk_volume_from_efi_handle(loaded_image->DeviceHandle);

10
stage23/lib/do_32.asm64
View File

@ -52,17 +52,15 @@ do_32:
bits 32
.go_32:
mov eax, cr0
btr eax, 31
mov eax, 0x00000011
mov cr0, eax
mov ecx, 0xc0000080
rdmsr
btr eax, 8
xor eax, eax
xor edx, edx
wrmsr
mov eax, cr4
btr eax, 5
xor eax, eax
mov cr4, eax
call edi

2
stage23/lib/panic.s2.c
View File

@ -10,8 +10,6 @@
#include <mm/pmm.h>
__attribute__((noreturn)) void panic(const char *fmt, ...) {
asm volatile ("cli" ::: "memory");
va_list args;
va_start(args, fmt);

4
stage23/protos/chainload.c
View File

@ -165,7 +165,7 @@ void chainload(char *config) {
efi_image_handle, &loaded_img_prot_guid,
&loader_loaded_image);
if (status) {
panic("HandleProtocol failure (%x)\n", status);
panic("chainload: HandleProtocol failure (%x)", status);
}
EFI_LOADED_IMAGE_PROTOCOL *new_handle_loaded_image = NULL;
@ -173,7 +173,7 @@ void chainload(char *config) {
new_handle, &loaded_img_prot_guid,
&new_handle_loaded_image);
if (status) {
panic("HandleProtocol failure (%x)\n", status);
panic("chainload: HandleProtocol failure (%x)", status);
}
new_handle_loaded_image->DeviceHandle = loader_loaded_image->DeviceHandle;

9
stage23/protos/linux.32.c
View File

@ -33,6 +33,15 @@ __attribute__((noreturn)) void linux_spinup(void *entry, void *boot_params) {
#endif
};
// Load invalid IDT
uint64_t invalid_idt[2] = {0, 0};
asm volatile (
"lidt %0"
:
: "m" (invalid_idt)
: "memory"
);
asm volatile (
"lgdt %0\n\t"

14
stage23/protos/linux.c
View File

@ -350,17 +350,17 @@ void linux_load(char *config, char *cmdline) {
char *kernel_path = config_get_value(config, 0, "KERNEL_PATH");
if (kernel_path == NULL)
panic("KERNEL_PATH not specified");
panic("linux: KERNEL_PATH not specified");
if (!uri_open(kernel, kernel_path))
panic("Could not open kernel resource");
panic("linux: Could not open kernel resource");
uint32_t signature;
fread(kernel, &signature, 0x202, sizeof(uint32_t));
// validate signature
if (signature != 0x53726448) {
panic("Invalid Linux kernel signature");
panic("linux: Invalid Linux kernel signature");
}
size_t setup_code_size = 0;
@ -389,7 +389,7 @@ void linux_load(char *config, char *cmdline) {
setup_header->version >> 8, setup_header->version & 0xff);
if (setup_header->version < 0x203) {
panic("Linux protocols < 2.03 are not supported");
panic("linux: Protocols < 2.03 are not supported");
}
setup_header->cmd_line_ptr = (uint32_t)(uintptr_t)cmdline;
@ -408,7 +408,7 @@ void linux_load(char *config, char *cmdline) {
setup_header->type_of_loader = 0xff;
if (!(setup_header->loadflags & (1 << 0))) {
panic("Linux kernels that load at 0x10000 are not supported");
panic("linux: Kernels that load at 0x10000 are not supported");
}
setup_header->loadflags &= ~(1 << 5); // print early messages
@ -443,7 +443,7 @@ void linux_load(char *config, char *cmdline) {
struct file_handle module;
if (!uri_open(&module, module_path))
panic("Could not open `%s`", module_path);
panic("linux: Could not open `%s`", module_path);
size_of_all_modules += module.size;
}
@ -466,7 +466,7 @@ void linux_load(char *config, char *cmdline) {
struct file_handle module;
if (!uri_open(&module, module_path))
panic("Could not open `%s`", module_path);
panic("linux: Could not open `%s`", module_path);
print("linux: Loading module `%s`...\n", module_path);

6
stage23/protos/stivale.c
View File

@ -41,12 +41,12 @@ void stivale_load(char *config, char *cmdline) {
char *kernel_path = config_get_value(config, 0, "KERNEL_PATH");
if (kernel_path == NULL)
panic("KERNEL_PATH not specified");
panic("stivale: KERNEL_PATH not specified");
print("stivale: Loading kernel `%s`...\n", kernel_path);
if (!uri_open(kernel_file, kernel_path))
panic("Could not open kernel resource");
panic("stivale: Could not open kernel resource");
struct stivale_header stivale_hdr;
@ -153,7 +153,7 @@ void stivale_load(char *config, char *cmdline) {
struct file_handle f;
if (!uri_open(&f, module_path))
panic("Requested module with path \"%s\" not found!", module_path);
panic("stivale: Requested module with path \"%s\" not found!", module_path);
m->begin = REPORTED_ADDR((uint64_t)(size_t)freadall(&f, STIVALE_MMAP_KERNEL_AND_MODULES));
m->end = m->begin + f.size;

6
stage23/protos/stivale2.c
View File

@ -63,12 +63,12 @@ void stivale2_load(char *config, char *cmdline, bool pxe, void *efi_system_table
char *kernel_path = config_get_value(config, 0, "KERNEL_PATH");
if (kernel_path == NULL)
panic("KERNEL_PATH not specified");
panic("stivale2: KERNEL_PATH not specified");
print("stivale2: Loading kernel `%s`...\n", kernel_path);
if (!uri_open(kernel_file, kernel_path))
panic("Could not open kernel resource");
panic("stivale2: Could not open kernel resource");
struct stivale2_header stivale2_hdr;
@ -228,7 +228,7 @@ void stivale2_load(char *config, char *cmdline, bool pxe, void *efi_system_table
struct file_handle f;
if (!uri_open(&f, module_path))
panic("Requested module with path \"%s\" not found!", module_path);
panic("stivale2: Requested module with path \"%s\" not found!", module_path);
m->begin = REPORTED_ADDR((uint64_t)(size_t)freadall(&f, STIVALE2_MMAP_KERNEL_AND_MODULES));
m->end = m->begin + f.size;

13
stage23/sys/smp_trampoline.real
View File

@ -14,8 +14,7 @@ smp_trampoline:
lea eax, [ebx + .mode32]
mov [cs:.farjmp_off], eax
mov eax, cr0
bts eax, 0
mov eax, 0x00000011
mov cr0, eax
o32 jmp far [cs:.farjmp]
@ -32,10 +31,8 @@ smp_trampoline:
mov gs, ax
mov ss, ax
mov eax, cr0
btr eax, 29
btr eax, 30
mov cr0, eax
xor eax, eax
mov cr4, eax
test dword [ebx + passed_info.target_mode], (1 << 2)
jz .nox2apic
@ -68,8 +65,8 @@ smp_trampoline:
mov cr3, eax
mov ecx, 0xc0000080
rdmsr
bts eax, 8
mov eax, 0x100
xor edx, edx
wrmsr
mov eax, cr0