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Fix boot phase mappings

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This commit is contained in:
Zhang Junyang 2023-11-30 22:20:57 +08:00 committed by Tate, Hongliang Tian
parent ebbe451cc4
commit 97323f612b
10 changed files with 156 additions and 102 deletions
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18
Cargo.lock generated
View File

@ -392,9 +392,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
[[package]]
name = "bitflags"
version = "2.3.3"
version = "2.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "630be753d4e58660abd17930c71b647fe46c27ea6b63cc59e1e3851406972e42"
checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
[[package]]
name = "bitvec"
@ -1028,7 +1028,7 @@ version = "0.16.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4b624a7b3f704734d98d21455b617607eb7043d4509d1c34bf9e7ff7dd47b31a"
dependencies = [
"bitflags 2.3.3",
"bitflags 2.4.1",
"derive_more",
"log",
"ptr_meta",
@ -1515,7 +1515,7 @@ version = "0.26.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "07ead9f748a4646479b850add36b527113a80e80a7e0f44d7b0334291850dcc5"
dependencies = [
"bitflags 2.3.3",
"bitflags 2.4.1",
"log",
"ptr_meta",
"ucs2",
@ -1541,7 +1541,7 @@ version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "62642516099c6441a5f41b0da8486d5fc3515a0603b0fdaea67b31600e22082e"
dependencies = [
"bitflags 2.3.3",
"bitflags 2.4.1",
"ptr_meta",
"uguid",
]
@ -1552,7 +1552,7 @@ version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "864ac69eadd877bfb34e7814be1928122ed0057d9f975169a56ee496aa7bdfd7"
dependencies = [
"bitflags 2.3.3",
"bitflags 2.4.1",
"ptr_meta",
"uguid",
]
@ -1737,12 +1737,12 @@ dependencies = [
[[package]]
name = "x86_64"
version = "0.14.10"
version = "0.14.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "100555a863c0092238c2e0e814c1096c1e5cf066a309c696a87e907b5f8c5d69"
checksum = "3b835097a84e4457323331ec5d6eb23d096066cbfb215d54096dcb4b2e85f500"
dependencies = [
"bit_field",
"bitflags 1.3.2",
"bitflags 2.4.1",
"rustversion",
"volatile",
]

11
framework/aster-frame/src/arch/x86/boot/boot.S
View File

@ -39,9 +39,14 @@ __linux32_boot:
.org 0x200
.global __linux64_boot_tag
__linux64_boot_tag:
lea rax, [rip + __linux64_boot] // jump into Rust code
call rax
jmp halt // unreachable here
// We switch back to 32-bit mode to call the 32-bit entry point.
lgdt [boot_gdtr]
mov eax, 0xb002b002 // magic for boot_params
mov ebx, esi // struct boot_params *
sub rsp, 8
mov dword ptr [rsp], offset __linux32_boot
mov dword ptr [rsp + 4], 24
retf
// The multiboot & multiboot2 entry point.
.code32

4
framework/libs/boot-trojan/trojan/Cargo.toml
View File

@ -12,10 +12,12 @@ uart_16550 = "0.3.0"
xmas-elf = "0.8.0"
[target.x86_64-unknown-none.dependencies]
bitflags = "2.4.1"
log = "0.4.20"
uefi = "0.26.0"
uefi-services = "0.23.0"
x86_64 = "0.14.11"
[features]
default = ["debug_print"]
default = []
debug_print = []

2
framework/libs/boot-trojan/trojan/build.rs
View File

@ -6,7 +6,7 @@ fn main() {
let linker_script = if target_arch == "x86_64-unknown-none" {
source_dir.join("src/x86/amd64_efi/linker.ld")
} else if target_arch == "x86_64-i386_pm-none" {
source_dir.join("src/arch/legacy_i386/linker.ld")
source_dir.join("src/x86/legacy_i386/linker.ld")
} else {
panic!("Unsupported target_arch: {}", target_arch);
};

44
framework/libs/boot-trojan/trojan/src/loader.rs
View File

@ -1,22 +1,37 @@
use xmas_elf::program::{ProgramHeader, SegmentData};
pub fn load_elf(file: &[u8]) -> u32 {
/// TODO: remove this and use copy_from_slice instead
///
/// We use a custom memcpy because the standard library's compiler's builtin memcpy
/// fails for some unknown reason.
unsafe fn memcpy(dst: *mut u8, src: *const u8, size: usize) {
let mut i = 0;
while i < size {
*dst.add(i) = *src.add(i);
i += 1;
}
}
pub fn load_elf(file: &[u8]) {
let elf = xmas_elf::ElfFile::new(file).unwrap();
for ph in elf.program_iter() {
let ProgramHeader::Ph64(program) = ph else {
panic!("[setup] Unexpected program header type!");
panic!("[setup] Unexpected program header type! Jinux should be 64-bit ELF binary.");
};
if program.get_type().unwrap() == xmas_elf::program::Type::Load {
let SegmentData::Undefined(header_data) = program.get_data(&elf).unwrap() else {
load_segment(&elf, program);
}
}
}
fn load_segment(file: &xmas_elf::ElfFile, program: &xmas_elf::program::ProgramHeader64) {
let SegmentData::Undefined(header_data) = program.get_data(&file).unwrap() else {
panic!("[setup] Unexpected segment data type!");
};
// Safety: the physical address from the ELF file is valid
let dst_slice = unsafe {
core::slice::from_raw_parts_mut(
program.physical_addr as *mut u8,
program.mem_size as usize,
)
core::slice::from_raw_parts_mut(program.physical_addr as *mut u8, program.mem_size as usize)
};
/* crate::println!(
"[setup loader debug] loading ELF segment at {:#x}, size = {:#x}",
@ -32,12 +47,15 @@ pub fn load_elf(file: &[u8]) -> u32 {
print_hex(program.mem_size as u64);
print_str("\n");
}
dst_slice[..program.file_size as usize].copy_from_slice(header_data);
// Safety: the ELF file is valid
// dst_slice[..program.file_size as usize].copy_from_slice(header_data);
unsafe {
memcpy(
dst_slice.as_mut_ptr(),
header_data.as_ptr(),
program.file_size as usize,
);
}
let zero_slice = &mut dst_slice[program.file_size as usize..];
zero_slice.fill(0);
}
}
// Return the Linux Boot Protocol entry point defined by Asterinas.
crate::x86::ASTER_ENTRY_POINT
}

42
framework/libs/boot-trojan/trojan/src/main.rs
View File

@ -5,47 +5,19 @@ use linux_boot_params::BootParams;
mod console;
mod loader;
// Unfortunately, the entrypoint is not defined here in the main.rs file.
// See the exported functions in the x86 module for details.
mod x86;
use console::{print_hex, print_str};
/// The entrypoint of the trojan. The architecture-specific entrypoint will call this function.
fn trojan_entry(boot_params_ptr: usize) -> ! {
// println!("[setup] bzImage loaded at {:#x}", x86::relocation::get_image_loaded_offset());
unsafe {
print_str("[setup] bzImage loaded at ");
print_hex(x86::relocation::get_image_loaded_offset() as u64);
print_str("\n");
}
// Safety: the boot_params_ptr is a valid pointer to be borrowed.
let boot_params = unsafe { &*(boot_params_ptr as *const BootParams) };
// Safety: the payload_offset and payload_length is valid.
let payload = unsafe {
fn get_payload(boot_params: &BootParams) -> &'static [u8] {
let hdr = &boot_params.hdr;
// The payload_offset field is not recorded in the relocation table, so we need to
// calculate the loaded offset manually.
let loaded_offset = x86::relocation::get_image_loaded_offset();
let payload_offset = (loaded_offset + hdr.payload_offset as isize) as usize;
let payload_length = hdr.payload_length as usize;
core::slice::from_raw_parts_mut(payload_offset as *mut u8, payload_length as usize)
};
// println!("[setup] loading ELF payload at {:#x}", payload as *const _ as *const u8 as usize);
unsafe {
print_str("[setup] loading ELF payload at ");
print_hex(payload as *const _ as *const u8 as u64);
print_str("\n");
}
let entrypoint = loader::load_elf(payload);
// println!("[setup] jumping to payload entrypoint at {:#x}", entrypoint);
unsafe {
print_str("[setup] jumping to payload entrypoint at ");
print_hex(entrypoint as u64);
print_str("\n");
}
// Safety: the entrypoint and the ptr is valid.
unsafe { x86::call_aster_entrypoint(entrypoint.into(), boot_params_ptr.try_into().unwrap()) };
// Safety: the payload_offset and payload_length is valid if we assume that the
// boot_params struct is correct.
unsafe { core::slice::from_raw_parts_mut(payload_offset as *mut u8, payload_length as usize) }
}

46
framework/libs/boot-trojan/trojan/src/x86/amd64_efi/efi.rs
View File

@ -1,4 +1,3 @@
use core::fmt::Write;
use uefi::{
data_types::Handle,
proto::loaded_image::LoadedImage,
@ -7,7 +6,7 @@ use uefi::{
use linux_boot_params::BootParams;
#[no_mangle]
#[export_name = "efi_stub_entry"]
extern "sysv64" fn efi_stub_entry(handle: Handle, mut system_table: SystemTable<Boot>) -> ! {
unsafe {
system_table.boot_services().set_image_handle(handle);
@ -23,7 +22,7 @@ extern "sysv64" fn efi_stub_entry(handle: Handle, mut system_table: SystemTable<
);
}
#[no_mangle]
#[export_name = "efi_handover_entry"]
extern "sysv64" fn efi_handover_entry(
handle: Handle,
mut system_table: SystemTable<Boot>,
@ -39,16 +38,21 @@ extern "sysv64" fn efi_handover_entry(
fn efi_phase_boot(
handle: Handle,
mut system_table: SystemTable<Boot>,
system_table: SystemTable<Boot>,
boot_params: *mut BootParams,
) -> ! {
// Safety: this init function is only called once.
unsafe { crate::console::init() };
// Safety: this is a right place to call this function.
// Safety: this is the right time to apply relocations.
unsafe { crate::x86::relocation::apply_rela_dyn_relocations() };
uefi_services::println!("[EFI stub] Relocations applied.");
uefi_services::println!("[EFI stub] Loading payload.");
let payload = unsafe { crate::get_payload(&*boot_params) };
crate::loader::load_elf(payload);
uefi_services::println!("[EFI stub] Exiting EFI boot services.");
let memory_type = {
let boot_services = system_table.boot_services();
@ -63,14 +67,40 @@ fn efi_phase_boot(
}
fn efi_phase_runtime(
mut system_table: SystemTable<Runtime>,
_system_table: SystemTable<Runtime>,
memory_map: MemoryMap<'static>,
boot_params: *mut BootParams,
boot_params_ptr: *mut BootParams,
) -> ! {
unsafe {
crate::console::print_str("[EFI stub] Entered runtime services.\n");
}
let boot_params = unsafe { &mut *boot_params_ptr };
// Write memory map to e820 table in boot_params.
let e820_table = &mut boot_params.e820_table;
let mut e820_entries = 0;
for md in memory_map.entries() {
if e820_entries >= e820_table.len() || e820_entries >= 128 {
break;
}
e820_table[e820_entries] = linux_boot_params::BootE820Entry {
addr: md.phys_start as u64,
size: md.page_count as u64 * 4096,
typ: match md.ty {
uefi::table::boot::MemoryType::CONVENTIONAL => linux_boot_params::E820Type::Ram,
uefi::table::boot::MemoryType::RESERVED => linux_boot_params::E820Type::Reserved,
uefi::table::boot::MemoryType::ACPI_RECLAIM => linux_boot_params::E820Type::Acpi,
uefi::table::boot::MemoryType::ACPI_NON_VOLATILE => {
linux_boot_params::E820Type::Nvs
}
_ => linux_boot_params::E820Type::Reserved,
},
};
e820_entries += 1;
}
boot_params.e820_entries = e820_entries as u8;
#[cfg(feature = "debug_print")]
unsafe {
use crate::console::{print_hex, print_str};
@ -90,5 +120,5 @@ fn efi_phase_runtime(
}
}
crate::trojan_entry(boot_params as usize);
unsafe { super::call_jinux_entrypoint(super::JINUX_ENTRY_POINT, boot_params_ptr as u64) }
}

2
framework/libs/boot-trojan/trojan/src/x86/amd64_efi/mod.rs
View File

@ -8,7 +8,7 @@ global_asm!(include_str!("setup.S"));
pub const ASTER_ENTRY_POINT: u32 = 0x8001200;
pub unsafe fn call_aster_entrypoint(entrypoint: u64, boot_params_ptr: u64) -> ! {
unsafe fn call_aster_entrypoint(entrypoint: u64, boot_params_ptr: u64) -> ! {
asm!("mov rsi, {}", in(reg) boot_params_ptr as u64);
asm!("mov rax, {}", in(reg) entrypoint as u64);
asm!("jmp rax");

34
framework/libs/boot-trojan/trojan/src/x86/legacy_i386/mod.rs
View File

@ -1,19 +1,43 @@
use linux_boot_params::BootParams;
use core::arch::{asm, global_asm};
global_asm!(include_str!("header.S"));
global_asm!(include_str!("setup.S"));
#[no_mangle]
extern "cdecl" fn _trojan_entry_32(boot_params_ptr: u32) -> ! {
use crate::console::{print_hex, print_str};
#[export_name = "_trojan_entry_32"]
extern "cdecl" fn trojan_entry(boot_params_ptr: u32) -> ! {
// Safety: this init function is only called once.
unsafe { crate::console::init() };
crate::trojan_entry(0, boot_params_ptr.try_into().unwrap());
// println!("[setup] bzImage loaded at {:#x}", x86::relocation::get_image_loaded_offset());
unsafe {
print_str("[setup] bzImage loaded at ");
print_hex(crate::x86::relocation::get_image_loaded_offset() as u64);
print_str("\n");
}
// Safety: the boot_params_ptr is a valid pointer to be borrowed.
let boot_params = unsafe { &*(boot_params_ptr as *const BootParams) };
// Safety: the payload_offset and payload_length is valid.
let payload = crate::get_payload(boot_params);
crate::loader::load_elf(payload);
// Safety: the entrypoint and the ptr is valid.
unsafe {
call_jinux_entrypoint(
super::JINUX_ENTRY_POINT,
boot_params_ptr.try_into().unwrap(),
)
};
}
pub const ASTER_ENTRY_POINT: u32 = 0x8001000;
pub unsafe fn call_aster_entrypoint(entrypoint: u32, boot_params_ptr: u32) -> ! {
unsafe fn call_aster_entrypoint(entrypoint: u32, boot_params_ptr: u32) -> ! {
asm!("mov esi, {}", in(reg) boot_params_ptr);
asm!("mov eax, {}", in(reg) entrypoint);
asm!("jmp eax");
@ -22,6 +46,6 @@ pub unsafe fn call_aster_entrypoint(entrypoint: u32, boot_params_ptr: u32) -> !
}
#[panic_handler]
fn panic(info: &core::panic::PanicInfo) -> ! {
fn panic(_info: &core::panic::PanicInfo) -> ! {
loop {}
}

3
framework/libs/boot-trojan/trojan/src/x86/relocation.rs
View File

@ -11,12 +11,14 @@ pub fn get_image_loaded_offset() -> isize {
start_of_setup32 as isize - START_OF_SETUP32_VA as isize
}
#[allow(unused)]
struct Elf64Rela {
r_offset: u64,
r_info: u64,
r_addend: i64,
}
#[allow(unused)]
fn get_rela_array() -> &'static [Elf64Rela] {
extern "C" {
fn __rela_dyn_start();
@ -59,6 +61,7 @@ const R_X86_64_RELATIVE: u32 = 8;
/// This function will modify the memory pointed by the relocations. And the Rust memory safety
/// mechanisms are not aware of these kind of modification. Failure to do relocations will cause
/// dyn Trait objects to break.
#[allow(unused)]
pub unsafe fn apply_rela_dyn_relocations() {
let image_loaded_offset = get_image_loaded_offset();
let relas = get_rela_array();