203 lines
4.9 KiB
C++
203 lines
4.9 KiB
C++
/*
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* Copyright (c) 2011, 2012, 2013, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/kernel/registers.h
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* Register structures and platform-specific bits.
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*/
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#ifndef INCLUDE_SORTIX_KERNEL_REGISTERS_H
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#define INCLUDE_SORTIX_KERNEL_REGISTERS_H
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#include <stddef.h>
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#include <stdint.h>
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namespace Sortix {
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// CPU flag register bits for 32-bit and 64-bit x86.
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#if defined(__i386__) || defined(__x86_64__)
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const size_t FLAGS_CARRY = 1 << 0; // 0x000001
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const size_t FLAGS_RESERVED1 = 1 << 1; // 0x000002, read as one
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const size_t FLAGS_PARITY = 1 << 2; // 0x000004
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const size_t FLAGS_RESERVED2 = 1 << 3; // 0x000008
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const size_t FLAGS_AUX = 1 << 4; // 0x000010
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const size_t FLAGS_RESERVED3 = 1 << 5; // 0x000020
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const size_t FLAGS_ZERO = 1 << 6; // 0x000040
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const size_t FLAGS_SIGN = 1 << 7; // 0x000080
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const size_t FLAGS_TRAP = 1 << 8; // 0x000100
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const size_t FLAGS_INTERRUPT = 1 << 9; // 0x000200
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const size_t FLAGS_DIRECTION = 1 << 10; // 0x000400
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const size_t FLAGS_OVERFLOW = 1 << 11; // 0x000800
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const size_t FLAGS_IOPRIVLEVEL = 1 << 12 | 1 << 13;
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const size_t FLAGS_NESTEDTASK = 1 << 14; // 0x004000
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const size_t FLAGS_RESERVED4 = 1 << 15; // 0x008000
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const size_t FLAGS_RESUME = 1 << 16; // 0x010000
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const size_t FLAGS_VIRTUAL8086 = 1 << 17; // 0x020000
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const size_t FLAGS_ALIGNCHECK = 1 << 18; // 0x040000
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const size_t FLAGS_VIRTINTR = 1 << 19; // 0x080000
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const size_t FLAGS_VIRTINTRPEND = 1 << 20; // 0x100000
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const size_t FLAGS_ID = 1 << 21; // 0x200000
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#endif
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// i386 registers structures.
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#if defined(__i386__)
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const uint32_t KCS = 0x08;
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const uint32_t KDS = 0x10;
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const uint32_t KRPL = 0x0;
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const uint32_t UCS = 0x18;
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const uint32_t UDS = 0x20;
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const uint32_t URPL = 0x3;
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const uint32_t RPLMASK = 0x3;
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#define GDT_FS_ENTRY 6
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#define GDT_GS_ENTRY 7
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struct interrupt_context
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{
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uint32_t signal_pending;
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uint32_t kerrno;
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uint32_t cr2;
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uint32_t ds;
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uint32_t edi;
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uint32_t esi;
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uint32_t ebp;
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uint32_t ebx;
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uint32_t edx;
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uint32_t ecx;
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uint32_t eax;
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uint32_t int_no;
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uint32_t err_code;
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uint32_t eip;
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uint32_t cs;
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uint32_t eflags;
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uint32_t esp;
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uint32_t ss;
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};
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__attribute__((unused))
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static inline bool InUserspace(const struct interrupt_context* intctx)
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{
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return (intctx->cs & RPLMASK) != KRPL;
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}
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struct thread_registers
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{
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uint32_t signal_pending;
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uint32_t kerrno;
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uint32_t eax;
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t edi;
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uint32_t esi;
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uint32_t esp;
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uint32_t ebp;
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uint32_t eip;
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uint32_t eflags;
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uint32_t fsbase;
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uint32_t gsbase;
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uint32_t cr3;
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uint32_t kernel_stack;
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uint32_t cs;
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uint32_t ds;
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uint32_t ss;
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__attribute__((aligned(16))) uint8_t fpuenv[512];
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};
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#endif
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// x86_64 registers structures.
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#if defined(__x86_64__)
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const uint64_t KCS = 0x08;
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const uint64_t KDS = 0x10;
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const uint64_t KRPL = 0x0;
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const uint64_t UCS = 0x18;
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const uint64_t UDS = 0x20;
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const uint64_t URPL = 0x3;
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const uint64_t RPLMASK = 0x3;
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struct interrupt_context
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{
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uint64_t signal_pending;
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uint64_t kerrno;
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uint64_t cr2;
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uint64_t ds;
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uint64_t rdi;
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uint64_t rsi;
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uint64_t rbp;
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uint64_t rbx;
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uint64_t rdx;
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uint64_t rcx;
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uint64_t rax;
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uint64_t r8;
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uint64_t r9;
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uint64_t r10;
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uint64_t r11;
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uint64_t r12;
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uint64_t r13;
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uint64_t r14;
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uint64_t r15;
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uint64_t int_no;
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uint64_t err_code;
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uint64_t rip;
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uint64_t cs;
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uint64_t rflags;
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uint64_t rsp;
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uint64_t ss;
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};
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__attribute__((unused))
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static inline bool InUserspace(const struct interrupt_context* intctx)
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{
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return (intctx->cs & RPLMASK) != KRPL;
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}
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struct thread_registers
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{
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uint64_t signal_pending;
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uint64_t kerrno;
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uint64_t rax;
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uint64_t rbx;
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uint64_t rcx;
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uint64_t rdx;
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uint64_t rdi;
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uint64_t rsi;
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uint64_t rsp;
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uint64_t rbp;
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uint64_t r8;
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uint64_t r9;
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uint64_t r10;
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uint64_t r11;
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uint64_t r12;
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uint64_t r13;
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uint64_t r14;
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uint64_t r15;
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uint64_t rip;
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uint64_t rflags;
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uint64_t fsbase;
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uint64_t gsbase;
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uint64_t cr3;
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uint64_t kernel_stack;
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uint64_t cs;
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uint64_t ds;
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uint64_t ss;
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__attribute__((aligned(16))) uint8_t fpuenv[512];
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};
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#endif
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void LogInterruptContext(const struct interrupt_context* intctx);
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__attribute__((noreturn))
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void LoadRegisters(const struct thread_registers* registers);
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} // namespace Sortix
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#endif
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