Noratrieb/rustv32i
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start tests

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This commit is contained in:
nora 2025-03-09 16:35:54 +01:00
parent ca565ddeb3
commit 0af012d43a
10 changed files with 412 additions and 118 deletions
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85
src/main.rs
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@ -1,88 +1,27 @@
use eyre::{OptionExt, bail, eyre};
use rustv32i::{
elf,
emu::{self, Memory, Reg},
};
// 2 MiB
const MEMORY_SIZE: usize = 2 << 21;
use eyre::eyre;
use rustv32i::emu::{self, Memory, Reg};
fn main() -> eyre::Result<()> {
let content = std::fs::read(std::env::args().nth(1).unwrap()).unwrap();
let elf = elf::Elf { content };
let header = elf.header()?;
let status = rustv32i::execute_linux_elf(
&content,
std::env::args().any(|arg| arg == "--debug"),
Box::new(ecall_handler),
)?;
let segments = elf.segments()?;
let mut mem = emu::Memory {
mem: vec![0; MEMORY_SIZE],
};
for phdr in segments {
match phdr.p_type {
// PT_NULL
0 => {}
// PT_LOAD
1 => {
if phdr.p_filesz > 0 {
let contents = &elf
.content
.get((phdr.p_offset as usize)..)
.ok_or_eyre("invalid offset")?
.get(..(phdr.p_filesz as usize))
.ok_or_eyre("invalid offset")?;
mem.mem
.get_mut((phdr.p_vaddr as usize)..)
.ok_or_eyre("invalid offset")?
.get_mut(..(phdr.p_filesz as usize))
.ok_or_eyre("invalid offset")?
.copy_from_slice(contents);
}
}
// PT_DYNAMIC
2 => {}
// PT_PHDR
6 => {}
// PT_GNU_EH_FRAME
1685382480 => {}
// PT_GNU_STACK
1685382481 => {}
// PT_GNU_RELRO
1685382482 => {}
// PT_RISCV_ATTRIBUTES
0x70000003 => {}
_ => bail!("unknown program header type: {}", phdr.p_type),
}
}
let start = header.e_entry;
let mut emu = emu::Emulator {
mem,
xreg: [0; 32],
xreg0_value: 0,
pc: start,
reservation_set: None,
debug: std::env::args().any(|arg| arg == "--debug"),
ecall_handler: Box::new(ecall_handler),
};
match emu.start_linux() {
emu::Error::Exit { code } => {
match status {
emu::Status::Exit { code } => {
eprintln!("exited with code {code}");
}
emu::Error::Trap(cause) => eprintln!("program trapped: {cause}"),
emu::Status::Trap(cause) => eprintln!("program trapped: {cause}"),
e => return Err(eyre!("error: {e:?}")),
}
Ok(())
}
fn ecall_handler(mem: &mut Memory, xreg: &mut [u32; 32]) -> Result<(), emu::Error> {
fn ecall_handler(mem: &mut Memory, xreg: &mut [u32; 32]) -> Result<(), emu::Status> {
let nr = xreg[Reg::A7.0 as usize];
match nr {
@ -122,7 +61,7 @@ fn ecall_handler(mem: &mut Memory, xreg: &mut [u32; 32]) -> Result<(), emu::Erro
}
// exit
93 => {
return Err(emu::Error::Exit {
return Err(emu::Status::Exit {
code: xreg[Reg::A0.0 as usize] as i32,
});
}