standalone: Refactor demo library to C

Needed for use by lli.
This commit is contained in:
David Mak 2023-09-29 15:15:18 +08:00 committed by sb10q
parent 059d3da58b
commit be3e8f50a2
4 changed files with 98 additions and 114 deletions

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@ -0,0 +1,89 @@
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if __SIZEOF_POINTER__ == 8
#define usize uint64_t
#elif __SIZEOF_POINTER__ == 4
#define usize uint32_t
#else
#error "Unsupported platform - Platform is not 32-bit or 64-bit"
#endif
void output_int32(const int32_t x) {
printf("%d\n", x);
}
void output_int64(const int64_t x) {
printf("%ld\n", x);
}
void output_uint32(const uint32_t x) {
printf("%d\n", x);
}
void output_uint64(const uint64_t x) {
printf("%ld\n", x);
}
void output_float64(const double x) {
printf("%f\n", x);
}
void output_asciiart(const int32_t x) {
const char* chars = " .,-:;i+hHM$*#@ ";
if (x < 0) {
putchar('\n');
} else {
putchar(chars[x]);
}
}
struct cslice {
const void* data;
usize len;
};
void output_int32_list(struct cslice* slice) {
const int32_t* data = (const int32_t*) slice->data;
putchar('[');
for (usize i = 0; i < slice->len; ++i) {
if (i == slice->len - 1) {
printf("%d", data[i]);
} else {
printf("%d, ", data[i]);
}
}
putchar(']');
putchar('\n');
}
void output_str(struct cslice* slice) {
const char* data = (const char*) slice->data;
for (usize i = 0; i < slice->len; ++i) {
putchar(data[i]);
}
putchar('\n');
}
uint32_t __nac3_personality(uint32_t state, uint32_t exception_object, uint32_t context) {
printf("__nac3_personality(state: %u, exception_object: %u, context: %u\n", state, exception_object, context);
exit(101);
__builtin_unreachable();
}
uint32_t __nac3_raise(uint32_t state, uint32_t exception_object, uint32_t context) {
printf("__nac3_raise(state: %u, exception_object: %u, context: %u\n", state, exception_object, context);
exit(101);
__builtin_unreachable();
}
void __nac3_end_catch(void) {}
extern int32_t run(void);
int main(void) {
run();
}

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@ -1,111 +0,0 @@
use std::io;
use std::io::Write;
use std::process::exit;
mod cslice {
// copied from https://github.com/dherman/cslice
use std::marker::PhantomData;
use std::slice;
#[repr(C)]
#[derive(Clone, Copy)]
pub struct CSlice<'a, T> {
base: *const T,
len: usize,
marker: PhantomData<&'a ()>,
}
impl<'a, T> AsRef<[T]> for CSlice<'a, T> {
fn as_ref(&self) -> &[T] {
unsafe { slice::from_raw_parts(self.base, self.len) }
}
}
}
#[no_mangle]
pub extern "C" fn output_int32(x: i32) {
println!("{}", x);
}
#[no_mangle]
pub extern "C" fn output_int64(x: i64) {
println!("{}", x);
}
#[no_mangle]
pub extern "C" fn output_uint32(x: u32) {
println!("{}", x);
}
#[no_mangle]
pub extern "C" fn output_uint64(x: u64) {
println!("{}", x);
}
#[no_mangle]
pub extern "C" fn output_float64(x: f64) {
// debug output to preserve the digits after the decimal points
// to match python `print` function
println!("{:?}", x);
}
#[no_mangle]
pub extern "C" fn output_asciiart(x: i32) {
let chars = " .,-:;i+hHM$*#@ ";
if x < 0 {
println!("");
} else {
print!("{}", chars.chars().nth(x as usize).unwrap());
}
}
#[no_mangle]
pub extern "C" fn output_str(x: &cslice::CSlice<u8>) {
for e in x.as_ref().iter() {
print!("{}", char::from(*e));
}
println!();
}
#[no_mangle]
pub extern "C" fn output_int32_list(x: &cslice::CSlice<i32>) {
print!("[");
let mut it = x.as_ref().iter().peekable();
while let Some(e) = it.next() {
if it.peek().is_none() {
print!("{}", e);
} else {
print!("{}, ", e);
}
}
println!("]");
}
#[no_mangle]
pub extern "C" fn __nac3_personality(_state: u32, _exception_object: u32, _context: u32) -> u32 {
unimplemented!();
}
#[no_mangle]
pub extern "C" fn __nac3_raise(state: u32, exception_object: u32, context: u32) -> u32 {
writeln!(io::stderr(),
"__nac3_raise(state: {:#010x}, exception_object: {:#010x}, context: {:#010x})",
state,
exception_object,
context
).unwrap();
exit(101);
}
#[no_mangle]
pub extern "C" fn __nac3_end_catch() {}
extern "C" {
fn run() -> i32;
}
fn main() {
unsafe {
run();
}
}

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@ -48,17 +48,21 @@ def patch(module):
else: else:
sys.stdout.write(" .,-:;i+hHM$*#@ "[x]) sys.stdout.write(" .,-:;i+hHM$*#@ "[x])
def output_float(x):
print("%f" % x)
def extern(fun): def extern(fun):
name = fun.__name__ name = fun.__name__
if name == "output_asciiart": if name == "output_asciiart":
return output_asciiart return output_asciiart
elif name == "output_float64":
return output_float
elif name in { elif name in {
"output_int32", "output_int32",
"output_int64", "output_int64",
"output_int32_list", "output_int32_list",
"output_uint32", "output_uint32",
"output_uint64", "output_uint64",
"output_float64",
"output_str", "output_str",
}: }:
return print return print

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@ -14,7 +14,9 @@ else
nac3standalone=../../target/x86_64-unknown-linux-gnu/release/nac3standalone nac3standalone=../../target/x86_64-unknown-linux-gnu/release/nac3standalone
fi fi
rm -f *.o rm -f "*.o" demo
$nac3standalone "$@" $nac3standalone "$@"
rustc -o demo demo.rs -Crelocation-model=static -Clink-arg=./module.o clang -c -std=gnu11 -Wall -Wextra -O3 -o demo.o demo.c
clang -o demo module.o demo.o
./demo ./demo