Stowage/ladybird
2
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-11-06 00:00:58 +00:00
Code Issues Projects Releases Packages Wiki Activity
ladybird/Userland/Libraries/LibSystem/syscall.h

49 lines
1.3 KiB
C
Raw Normal View History

Userland: Add LibSystem and funnel all syscalls through it This achieves two things: - Programs can now intentionally perform arbitrary syscalls by calling syscall(). This allows us to work on things like syscall fuzzing. - It restricts the ability of userspace to make syscalls to a single 4KB page of code. In order to call the kernel directly, an attacker must now locate this page and call through it.
2021-02-05 12:16:30 +01:00
/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 01:24:48 -07:00
* SPDX-License-Identifier: BSD-2-Clause
Userland: Add LibSystem and funnel all syscalls through it This achieves two things: - Programs can now intentionally perform arbitrary syscalls by calling syscall(). This allows us to work on things like syscall fuzzing. - It restricts the ability of userspace to make syscalls to a single 4KB page of code. In order to call the kernel directly, an attacker must now locate this page and call through it.
2021-02-05 12:16:30 +01:00
*/
#pragma once
#include <Kernel/API/Syscall.h>
#include <sys/types.h>
extern "C" {
uintptr_t syscall0(uintptr_t function);
uintptr_t syscall1(uintptr_t function, uintptr_t arg0);
uintptr_t syscall2(uintptr_t function, uintptr_t arg0, uintptr_t arg1);
uintptr_t syscall3(uintptr_t function, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2);
Kernel+LibSystem: Add a 4th syscall argument Let's allow passing 4 function arguments to a syscall. The 4th argument goes into ESI or RSI.
2021-07-24 02:15:07 +02:00
uintptr_t syscall4(uintptr_t function, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3);
Userland: Add LibSystem and funnel all syscalls through it This achieves two things: - Programs can now intentionally perform arbitrary syscalls by calling syscall(). This allows us to work on things like syscall fuzzing. - It restricts the ability of userspace to make syscalls to a single 4KB page of code. In order to call the kernel directly, an attacker must now locate this page and call through it.
2021-02-05 12:16:30 +01:00
}
#ifdef __cplusplus
inline uintptr_t syscall(auto function)
{
return syscall0(function);
}
inline uintptr_t syscall(auto function, auto arg0)
{
return syscall1((uintptr_t)function, (uintptr_t)arg0);
}
inline uintptr_t syscall(auto function, auto arg0, auto arg1)
{
return syscall2((uintptr_t)function, (uintptr_t)arg0, (uintptr_t)arg1);
}
inline uintptr_t syscall(auto function, auto arg0, auto arg1, auto arg2)
{
return syscall3((uintptr_t)function, (uintptr_t)arg0, (uintptr_t)arg1, (uintptr_t)arg2);
}
Kernel+LibSystem: Add a 4th syscall argument Let's allow passing 4 function arguments to a syscall. The 4th argument goes into ESI or RSI.
2021-07-24 02:15:07 +02:00
inline uintptr_t syscall(auto function, auto arg0, auto arg1, auto arg2, auto arg3)
{
return syscall4((uintptr_t)function, (uintptr_t)arg0, (uintptr_t)arg1, (uintptr_t)arg2, (uintptr_t)arg3);
}
Userland: Add LibSystem and funnel all syscalls through it This achieves two things: - Programs can now intentionally perform arbitrary syscalls by calling syscall(). This allows us to work on things like syscall fuzzing. - It restricts the ability of userspace to make syscalls to a single 4KB page of code. In order to call the kernel directly, an attacker must now locate this page and call through it.
2021-02-05 12:16:30 +01:00
#endif
Reference in a new issue Copy permalink