Split shared ld_so code and actual ld_so stubs.

This commit is contained in:
4lDO2
2024-05-01 13:17:20 +02:00
parent 73952b69ed
commit 326c8a6231
8 changed files with 5 additions and 5 deletions
-8
View File
@@ -1,8 +0,0 @@
[package]
name = "ld_so"
version = "0.1.0"
authors = ["Jeremy Soller <jackpot51@gmail.com>"]
[lib]
name = "ld_so"
crate-type = ["staticlib"]
@@ -1,245 +0,0 @@
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}
-245
View File
@@ -1,245 +0,0 @@
/* Script for -z combreloc */
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Copying and distribution of this script, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved. */
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OUTPUT_ARCH(i386:x86-64)
ENTRY(_start)
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-82
View File
@@ -1,82 +0,0 @@
#![no_std]
#![feature(linkage)]
use core::arch::global_asm;
#[cfg(target_arch = "aarch64")]
global_asm!(
"
.globl _start
_start:
mov x0, sp
and sp, x0, #0xfffffffffffffff0 //align sp
bl relibc_ld_so_start
# TODO: aarch64
udf #0
"
);
#[cfg(target_arch = "x86")]
global_asm!(
"
.globl _start
_start:
push esp
call relibc_ld_so_start
pop esp
# TODO: x86
ud2
"
);
#[cfg(target_arch = "x86_64")]
global_asm!(
"
.globl _start
_start:
# rsi = _start + 5
call 2f
2: pop rsi
# Save original stack and align stack to 16 bytes
mov rbp, rsp
and rsp, 0xFFFFFFFFFFFFFFF0
# Call ld_so_start(stack, entry)
mov rdi, rbp
sub rsi, 5
call relibc_ld_so_start
# Restore original stack, clear registers, and jump to new start function
mov rsp, rbp
xor rcx, rcx
xor rdx, rdx
xor rdi, rdi
xor rsi, rsi
xor r8, r8
xor r9, r9
xor r10, r10
xor r11, r11
fninit
jmp rax
"
);
#[no_mangle]
pub unsafe extern "C" fn main(_argc: isize, _argv: *const *const i8) -> usize {
// LD
0x1D
}
#[linkage = "weak"]
#[no_mangle]
extern "C" fn relibc_panic(pi: &::core::panic::PanicInfo) -> ! {
loop {}
}
#[panic_handler]
#[linkage = "weak"]
#[no_mangle]
pub unsafe fn rust_begin_unwind(pi: &::core::panic::PanicInfo) -> ! {
relibc_panic(pi)
}