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use core::fmt;
use super::{Address, Offset, Error, Encoding, Entry};
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum ProgramType {
Null,
Load,
Dynamic,
Interpreter,
Note,
Shlib,
ProgramHeaderTable,
OsSpecific(u32),
ProcessorSprcific(u32),
Unknown(u32),
}
impl From<u32> for ProgramType {
fn from(v: u32) -> Self {
match v {
0x00000000 => ProgramType::Null,
0x00000001 => ProgramType::Load,
0x00000002 => ProgramType::Dynamic,
0x00000003 => ProgramType::Interpreter,
0x00000004 => ProgramType::Note,
0x00000005 => ProgramType::Shlib,
0x00000006 => ProgramType::ProgramHeaderTable,
t @ 0x60000000..=0x6fffffff => ProgramType::OsSpecific(t),
t @ 0x70000000..=0x7fffffff => ProgramType::ProcessorSprcific(t),
t => ProgramType::Unknown(t),
}
}
}
bitflags! {
pub struct ProgramFlags: u32 {
const EXECUTE = 0b00000001;
const WRITE = 0b00000010;
const READ = 0b00000100;
}
}
#[derive(Clone, Eq, PartialEq)]
pub struct ProgramHeader {
pub ty: ProgramType,
pub flags: ProgramFlags,
pub file_offset: Offset,
pub virtual_address: Address,
pub physical_address: Address,
pub file_size: u64,
pub memory_size: u64,
pub address_alignment: u64,
}
impl fmt::Debug for ProgramHeader {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("ProgramHeader")
.field("type", &self.ty)
.field("flags", &self.flags)
.field("file_offset", &format_args!("0x{:016x}", self.file_offset))
.field(
"virtual_address",
&format_args!("0x{:016x}", self.virtual_address),
)
.field(
"physical_address",
&format_args!("0x{:016x}", self.physical_address),
)
.field("file_size", &format_args!("0x{:016x}", self.file_size))
.field("memory_size", &format_args!("0x{:016x}", self.memory_size))
.field(
"address_alignment",
&format_args!("0x{:016x}", self.address_alignment),
)
.finish()
}
}
impl Entry for ProgramHeader {
type Error = Error;
const SIZE: usize = 0x38;
fn new(slice: &[u8], encoding: Encoding) -> Result<Self, Self::Error> {
if slice.len() < Self::SIZE {
return Err(Error::SliceTooShort);
}
Ok(ProgramHeader {
ty: read_int!(&slice[0x00..], &encoding, u32).into(),
flags: ProgramFlags::from_bits_truncate(read_int!(&slice[0x04..], &encoding, u32)),
file_offset: read_int!(&slice[0x08..], &encoding, u64),
virtual_address: read_int!(&slice[0x10..], &encoding, u64),
physical_address: read_int!(&slice[0x18..], &encoding, u64),
file_size: read_int!(&slice[0x20..], &encoding, u64),
memory_size: read_int!(&slice[0x28..], &encoding, u64),
address_alignment: read_int!(&slice[0x30..], &encoding, u64),
})
}
}