mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 03:32:45 +00:00
40f64d7379
This matches the behaviour of the other *nixs and allows processes to try and recover from such signals in userland.
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
/*
|
|
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Atomic.h>
|
|
#include <AK/Concepts.h>
|
|
#include <AK/Vector.h>
|
|
|
|
#include <Kernel/Arch/x86/DescriptorTable.h>
|
|
|
|
#include <AK/Platform.h>
|
|
VALIDATE_IS_X86()
|
|
|
|
/* Map IRQ0-15 @ ISR 0x50-0x5F */
|
|
#define IRQ_VECTOR_BASE 0x50
|
|
#define GENERIC_INTERRUPT_HANDLERS_COUNT (256 - IRQ_VECTOR_BASE)
|
|
#define PAGE_MASK (~(FlatPtr)0xfffu)
|
|
|
|
namespace Kernel {
|
|
|
|
struct RegisterState;
|
|
class GenericInterruptHandler;
|
|
|
|
static constexpr u32 safe_eflags_mask = 0xdff;
|
|
static constexpr u32 iopl_mask = 3u << 12;
|
|
|
|
inline u32 get_iopl_from_eflags(u32 eflags)
|
|
{
|
|
return (eflags & iopl_mask) >> 12;
|
|
}
|
|
|
|
const DescriptorTablePointer& get_gdtr();
|
|
const DescriptorTablePointer& get_idtr();
|
|
|
|
void handle_crash(RegisterState const&, char const* description, int signal, bool out_of_memory = false);
|
|
|
|
#define LSW(x) ((u32)(x)&0xFFFF)
|
|
#define MSW(x) (((u32)(x) >> 16) & 0xFFFF)
|
|
#define LSB(x) ((x)&0xFF)
|
|
#define MSB(x) (((x) >> 8) & 0xFF)
|
|
|
|
constexpr FlatPtr page_base_of(FlatPtr address)
|
|
{
|
|
return address & PAGE_MASK;
|
|
}
|
|
|
|
inline FlatPtr page_base_of(const void* address)
|
|
{
|
|
return page_base_of((FlatPtr)address);
|
|
}
|
|
|
|
constexpr FlatPtr offset_in_page(FlatPtr address)
|
|
{
|
|
return address & (~PAGE_MASK);
|
|
}
|
|
|
|
inline FlatPtr offset_in_page(const void* address)
|
|
{
|
|
return offset_in_page((FlatPtr)address);
|
|
}
|
|
|
|
}
|