Use ASM exception wrapper
This commit is contained in:
Mathieu Maret
parent
4e14b05f72
commit
5c7242e4dc
6
Makefile
6
Makefile
@ -17,7 +17,7 @@ CPPFLAGS += $(foreach dir, $(SUBDIRS), -I$(dir))
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asmsrc=$(wildcard arch/$(ARCH)/boot/*.asm)
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asmsrc=$(wildcard arch/$(ARCH)/boot/*.asm)
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asmobj=$(asmsrc:%.asm=%.o)
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asmobj=$(asmsrc:%.asm=%.o)
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csrc=$(shell find $(SUBDIRS) -type f -name "*.c")# $(wildcard *.c)
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csrc=$(shell find $(SUBDIRS) -type f -name "*.c")# $(wildcard *.c)
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cobj=$(csrc:%.c=%.o) arch/$(ARCH)/cpu_context_switch.o arch/$(ARCH)/irq_pit.o arch/$(ARCH)/irq_wrappers.o
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cobj=$(csrc:%.c=%.o) arch/$(ARCH)/cpu_context_switch.o arch/$(ARCH)/irq_pit.o arch/$(ARCH)/irq_wrappers.o arch/$(ARCH)/exception_wrappers.o
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deps = $(csrc:%.c=%.d)
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deps = $(csrc:%.c=%.d)
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kernel kernel.sym &: $(asmobj) $(cobj) linker.ld
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kernel kernel.sym &: $(asmobj) $(cobj) linker.ld
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@ -34,10 +34,6 @@ fd.iso: kernel
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disk.img:
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disk.img:
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qemu-img create -f qcow2 disk.img 32M
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qemu-img create -f qcow2 disk.img 32M
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#https://gcc.gnu.org/onlinedocs/gcc/x86-Function-Attributes.html#x86-Function-Attributes
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arch/$(ARCH)/exception_handler.o:arch/$(ARCH)/exception_handler.c
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$(CC) $(CFLAGS) $(CPPFLAGS) -mgeneral-regs-only -c $< -o $@
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%.o:%.asm
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%.o:%.asm
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$(AS) $(ASFLAGS) -o $@ $<
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$(AS) $(ASFLAGS) -o $@ $<
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@ -1,12 +1,29 @@
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#include "exception.h"
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#include "exception.h"
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#include "cpu_context.h"
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#include "idt.h"
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#include "idt.h"
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#include "interrupt.h"
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#include "interrupt.h"
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#include "irq.h"
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#include "irq.h"
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#include "klibc.h"
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#include "kthread.h"
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#include "vga.h"
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exception_handler exception_handler_array[EXCEPTION_NUM] = {
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exception_handler exception_handler_array[EXCEPTION_NUM] = {
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NULL,
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NULL,
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};
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};
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extern vaddr_t exception_handler_wrapper_array[EXCEPTION_NUM];
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void exception_handler_wrap(int intr, struct cpu_state *frame)
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{
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if (0 > intr || EXCEPTION_NUM <= intr) {
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pr_err("Trying to handle unknow exception %d\n", intr);
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return;
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}
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if (exception_handler_array[intr] != NULL)
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exception_handler_array[intr](frame, intr);
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}
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int exceptionSetRoutine(int exception, exception_handler handler)
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int exceptionSetRoutine(int exception, exception_handler handler)
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{
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{
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uint32_t flags;
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uint32_t flags;
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@ -17,54 +34,42 @@ int exceptionSetRoutine(int exception, exception_handler handler)
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exception_handler_array[exception] = handler;
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exception_handler_array[exception] = handler;
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idt_set_handler(EXCEPTION_INTERRUPT_BASE_ADDRESS + exception, (unsigned int)handler, 0);
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idt_set_handler(EXCEPTION_INTERRUPT_BASE_ADDRESS + exception,
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(unsigned int)exception_handler_wrapper_array[exception], 0);
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restore_IRQs(flags);
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restore_IRQs(flags);
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return 0;
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return 0;
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}
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}
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void print_handler(struct cpu_state *frame, ulong intr)
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{
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int intNbInt = intr;
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VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "EXCEPTION %d %d", intNbInt, intr);
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printf("Exception %d (Err %d) at 0x%x\n", intr, intr,
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cpu_context_get_PC(frame));
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asm("hlt");
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}
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void pagefault_handler(struct cpu_state *frame, ulong intr)
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{
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// A page fault has occurred.
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// The faulting address is stored in the CR2 register.
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uint32_t faulting_address;
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asm volatile("mov %%cr2, %0" : "=r"(faulting_address));
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struct kthread *current = getCurrentThread();
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printf("page fault while in thread %s at 0x%x 0x%x\n", current->name, faulting_address,
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cpu_context_get_PC(frame));
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VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "PAGE FAULT %d", intr);
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(void)intr;
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for (;;)
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continue;
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}
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int exceptionSetup()
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int exceptionSetup()
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{
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{
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exceptionSetRoutine(EXCEPTION_DOUBLE_FAULT, ACCESS_INTERRUPT(EXCEPTION_DOUBLE_FAULT));
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for (int i = 0; i < EXCEPTION_NUM; i++) {
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exceptionSetRoutine(EXCEPTION_DIVIDE_ZERO, ACCESS_INTERRUPT(EXCEPTION_DIVIDE_ZERO));
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exceptionSetRoutine(i, print_handler);
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// Used by the DBG
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}
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// exceptionSetRoutine(EXCEPTION_DEBUG, ACCESS_INTERRUPT(EXCEPTION_DEBUG));
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exceptionSetRoutine(EXCEPTION_NMI, ACCESS_INTERRUPT(EXCEPTION_NMI));
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exceptionSetRoutine(EXCEPTION_BREAKPOINT, ACCESS_INTERRUPT(EXCEPTION_BREAKPOINT));
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exceptionSetRoutine(EXCEPTION_OVERFLOW, ACCESS_INTERRUPT(EXCEPTION_OVERFLOW));
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exceptionSetRoutine(EXCEPTION_BOUND_RANGE_EXCEEDED,
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ACCESS_INTERRUPT(EXCEPTION_BOUND_RANGE_EXCEEDED));
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exceptionSetRoutine(EXCEPTION_INVALID_OPCODE, ACCESS_INTERRUPT(EXCEPTION_INVALID_OPCODE));
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exceptionSetRoutine(EXCEPTION_DEVICE_NOT_AVAILABLE,
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ACCESS_INTERRUPT(EXCEPTION_DEVICE_NOT_AVAILABLE));
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exceptionSetRoutine(EXCEPTION_COPRO_OVERRUN, ACCESS_INTERRUPT(EXCEPTION_COPRO_OVERRUN));
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exceptionSetRoutine(EXCEPTION_INVALID_TSS, ACCESS_INTERRUPT(EXCEPTION_INVALID_TSS));
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exceptionSetRoutine(EXCEPTION_SEGMENT_NOT_PRESENT,
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ACCESS_INTERRUPT(EXCEPTION_SEGMENT_NOT_PRESENT));
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exceptionSetRoutine(EXCEPTION_STACK_SEGMENT_FAULT,
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ACCESS_INTERRUPT(EXCEPTION_STACK_SEGMENT_FAULT));
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exceptionSetRoutine(EXCEPTION_GENERAL_PROTECTION_FAULT,
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ACCESS_INTERRUPT(EXCEPTION_GENERAL_PROTECTION_FAULT));
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exceptionSetRoutine(EXCEPTION_PAGE_FAULT, ACCESS_INTERRUPT(EXCEPTION_PAGE_FAULT));
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exceptionSetRoutine(EXCEPTION_RESERVED_1, ACCESS_INTERRUPT(EXCEPTION_RESERVED_1));
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exceptionSetRoutine(EXCEPTION_X87_FP_EXCEPTION,
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ACCESS_INTERRUPT(EXCEPTION_X87_FP_EXCEPTION));
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exceptionSetRoutine(EXCEPTION_ALIGNMENT_CHECK,
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ACCESS_INTERRUPT(EXCEPTION_ALIGNMENT_CHECK));
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exceptionSetRoutine(EXCEPTION_MACHINE_CHECK, ACCESS_INTERRUPT(EXCEPTION_MACHINE_CHECK));
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exceptionSetRoutine(EXCEPTION_SIMD_FP, ACCESS_INTERRUPT(EXCEPTION_SIMD_FP));
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exceptionSetRoutine(EXCEPTION_VIRTUALIZATION, ACCESS_INTERRUPT(EXCEPTION_VIRTUALIZATION));
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exceptionSetRoutine(EXCEPTION_RESERVED_2, ACCESS_INTERRUPT(EXCEPTION_RESERVED_2));
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exceptionSetRoutine(EXCEPTION_RESERVED_3, ACCESS_INTERRUPT(EXCEPTION_RESERVED_3));
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exceptionSetRoutine(EXCEPTION_RESERVED_4, ACCESS_INTERRUPT(EXCEPTION_RESERVED_4));
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exceptionSetRoutine(EXCEPTION_RESERVED_5, ACCESS_INTERRUPT(EXCEPTION_RESERVED_5));
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exceptionSetRoutine(EXCEPTION_RESERVED_6, ACCESS_INTERRUPT(EXCEPTION_RESERVED_6));
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exceptionSetRoutine(EXCEPTION_RESERVED_7, ACCESS_INTERRUPT(EXCEPTION_RESERVED_7));
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exceptionSetRoutine(EXCEPTION_RESERVED_8, ACCESS_INTERRUPT(EXCEPTION_RESERVED_8));
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exceptionSetRoutine(EXCEPTION_RESERVED_9, ACCESS_INTERRUPT(EXCEPTION_RESERVED_9));
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exceptionSetRoutine(EXCEPTION_RESERVED_10, ACCESS_INTERRUPT(EXCEPTION_RESERVED_10));
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exceptionSetRoutine(EXCEPTION_SECURITY, ACCESS_INTERRUPT(EXCEPTION_SECURITY));
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exceptionSetRoutine(EXCEPTION_RESERVED_11, ACCESS_INTERRUPT(EXCEPTION_RESERVED_11));
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exceptionSetRoutine(EXCEPTION_PAGE_FAULT, pagefault_handler);
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exceptionSetRoutine(EXCEPTION_PAGE_FAULT, pagefault_handler);
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return 0;
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return 0;
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}
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}
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@ -1,4 +1,5 @@
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#pragma once
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#pragma once
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#include "cpu_context.h"
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#include "interrupt.h"
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#include "interrupt.h"
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#include "stdarg.h"
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#include "stdarg.h"
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@ -39,8 +40,8 @@
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#define EXCEPTION_SECURITY 30
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#define EXCEPTION_SECURITY 30
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#define EXCEPTION_RESERVED_11 31
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#define EXCEPTION_RESERVED_11 31
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#define EXCEPTION_NUM 32
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#define EXCEPTION_NUM 0x20
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typedef void (*exception_handler)(struct interrupt_frame *frame, ulong error_code);
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typedef void (*exception_handler)(struct cpu_state *frame, ulong intr_number);
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int exceptionSetRoutine(int exception, exception_handler handler);
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int exceptionSetRoutine(int exception, exception_handler handler);
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int exceptionSetup();
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int exceptionSetup();
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@ -1,71 +0,0 @@
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#include "exception.h"
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#include "klibc.h"
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#include "kthread.h"
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#include "vga.h"
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#define STR_HELPER(x) #x
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#define STR(x) STR_HELPER(x)
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// Need GCC > 6
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#define DEFINE_INTERRUPT(int_nb) \
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__attribute__((interrupt)) void print_handler_##int_nb(struct interrupt_frame *frame, \
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ulong error_code) \
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{ \
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int intNbInt = int_nb; \
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VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "EXCEPTION %d %d", intNbInt, error_code); \
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printf("Exception %d (Err %d) at 0x%x\n", int_nb, error_code, frame->eip); \
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asm("hlt"); \
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}
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DEFINE_INTERRUPT(EXCEPTION_DOUBLE_FAULT)
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DEFINE_INTERRUPT(EXCEPTION_DIVIDE_ZERO)
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DEFINE_INTERRUPT(EXCEPTION_DEBUG)
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DEFINE_INTERRUPT(EXCEPTION_NMI)
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DEFINE_INTERRUPT(EXCEPTION_BREAKPOINT)
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DEFINE_INTERRUPT(EXCEPTION_OVERFLOW)
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DEFINE_INTERRUPT(EXCEPTION_BOUND_RANGE_EXCEEDED)
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DEFINE_INTERRUPT(EXCEPTION_INVALID_OPCODE)
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DEFINE_INTERRUPT(EXCEPTION_DEVICE_NOT_AVAILABLE)
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DEFINE_INTERRUPT(EXCEPTION_COPRO_OVERRUN)
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DEFINE_INTERRUPT(EXCEPTION_INVALID_TSS)
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DEFINE_INTERRUPT(EXCEPTION_SEGMENT_NOT_PRESENT)
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DEFINE_INTERRUPT(EXCEPTION_STACK_SEGMENT_FAULT)
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DEFINE_INTERRUPT(EXCEPTION_GENERAL_PROTECTION_FAULT)
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DEFINE_INTERRUPT(EXCEPTION_PAGE_FAULT)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_1)
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DEFINE_INTERRUPT(EXCEPTION_X87_FP_EXCEPTION)
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DEFINE_INTERRUPT(EXCEPTION_ALIGNMENT_CHECK)
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DEFINE_INTERRUPT(EXCEPTION_MACHINE_CHECK)
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DEFINE_INTERRUPT(EXCEPTION_SIMD_FP)
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DEFINE_INTERRUPT(EXCEPTION_VIRTUALIZATION)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_2)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_3)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_4)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_5)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_6)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_7)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_8)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_9)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_10)
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DEFINE_INTERRUPT(EXCEPTION_SECURITY)
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DEFINE_INTERRUPT(EXCEPTION_RESERVED_11)
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// c.f. https://wiki.osdev.org/Paging#Handling
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// error_code bit0: Present ?
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// bit1: Trying to write ?
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// bit2: User page try to access?
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__attribute__((interrupt)) void pagefault_handler(struct interrupt_frame *frame,
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ulong error_code)
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{
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// A page fault has occurred.
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// The faulting address is stored in the CR2 register.
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uint32_t faulting_address;
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asm volatile("mov %%cr2, %0" : "=r"(faulting_address));
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struct kthread *current = getCurrentThread();
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printf("page fault while in thread %s at 0x%x\n", current->name, faulting_address);
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VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "PAGE FAULT %d", error_code);
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(void)faulting_address;
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(void)frame;
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(void)error_code;
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for(;;)
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continue;
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}
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84
arch/x86/exception_wrappers.S
Normal file
84
arch/x86/exception_wrappers.S
Normal file
@ -0,0 +1,84 @@
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#define ASM_SOURCE 1
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.file "irq_wrappers.S"
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.text
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.extern exception_handler_wrap
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.globl exception_handler_wrapper_array
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.altmacro
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.macro exception_mac id
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exception_wrapper_\id:
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.type exception_wrapper_\id,@function
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/* INTERRUPT FRAME START */
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/* ALREADY PUSHED TO US BY THE PROCESSOR UPON ENTRY TO THIS INTERRUPT */
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/* uint32_t ip */
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/* uint32_t cs; */
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/* uint32_t flags */
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/* Pushes the other reg to save same and look like a struct cpu_state*/
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/* Fake error code */
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pushl $0
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/* Backup the actual context */
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pushl %ebp
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movl %esp, %ebp
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pushl %edi
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pushl %esi
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pushl %edx
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pushl %ecx
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pushl %ebx
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pushl %eax
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subl $2,%esp
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pushw %ss
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pushw %ds
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pushw %es
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pushw %fs
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pushw %gs
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push %esp
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pushl $\id
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call exception_handler_wrap
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addl $8, %esp
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/* Restore the context */
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popw %gs
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popw %fs
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popw %es
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popw %ds
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popw %ss
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addl $2,%esp
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popl %eax
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popl %ebx
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popl %ecx
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popl %edx
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popl %esi
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popl %edi
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popl %ebp
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/* Remove fake error code */
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addl $4, %esp
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iret
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.endm
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.set i, 0
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.rept 0x20
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exception_mac %i
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.set i, i+1
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.endr
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.macro ref_exception_wrapper id
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.long exception_wrapper_\id
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.endm
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.section ".rodata"
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.p2align 5, 0x0
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exception_handler_wrapper_array:
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.set i, 0x0
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.rept 0x20
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ref_exception_wrapper %i
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.set i, i+1
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.endr
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@ -10,45 +10,5 @@ struct interrupt_frame {
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uint32_t eflags;
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uint32_t eflags;
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} __attribute__((packed));
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} __attribute__((packed));
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// Exception
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#define DECLARE_INTERRUPT(int_nb) \
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void print_handler_##int_nb(struct interrupt_frame *frame, ulong error_code);
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#define ACCESS_INTERRUPT(int_nb) print_handler_##int_nb
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void pagefault_handler(struct interrupt_frame *frame, ulong error_code);
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DECLARE_INTERRUPT(EXCEPTION_DOUBLE_FAULT)
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DECLARE_INTERRUPT(EXCEPTION_DIVIDE_ZERO)
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DECLARE_INTERRUPT(EXCEPTION_DEBUG)
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DECLARE_INTERRUPT(EXCEPTION_NMI)
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DECLARE_INTERRUPT(EXCEPTION_BREAKPOINT)
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DECLARE_INTERRUPT(EXCEPTION_OVERFLOW)
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DECLARE_INTERRUPT(EXCEPTION_BOUND_RANGE_EXCEEDED)
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DECLARE_INTERRUPT(EXCEPTION_INVALID_OPCODE)
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DECLARE_INTERRUPT(EXCEPTION_DEVICE_NOT_AVAILABLE)
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DECLARE_INTERRUPT(EXCEPTION_COPRO_OVERRUN)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_INVALID_TSS)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_SEGMENT_NOT_PRESENT)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_STACK_SEGMENT_FAULT)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_GENERAL_PROTECTION_FAULT)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_PAGE_FAULT)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_1)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_X87_FP_EXCEPTION)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_ALIGNMENT_CHECK)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_MACHINE_CHECK)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_SIMD_FP)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_VIRTUALIZATION)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_2)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_3)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_4)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_5)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_6)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_7)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_8)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_9)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_10)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_SECURITY)
|
|
||||||
DECLARE_INTERRUPT(EXCEPTION_RESERVED_11)
|
|
||||||
|
|
||||||
// IRQ
|
// IRQ
|
||||||
void pit_handler(struct interrupt_frame *frame);
|
void pit_handler(struct interrupt_frame *frame);
|
||||||
|
|||||||
@ -42,7 +42,7 @@ void initPic(void)
|
|||||||
outb(PIC_SLAVE_DATA, 0xFF);
|
outb(PIC_SLAVE_DATA, 0xFF);
|
||||||
}
|
}
|
||||||
|
|
||||||
void EOIIrq(int irq)
|
inline void EOIIrq(int irq)
|
||||||
{
|
{
|
||||||
if (irq >= 8)
|
if (irq >= 8)
|
||||||
outb(PIC_SLAVE_CMD, PIC_EOI);
|
outb(PIC_SLAVE_CMD, PIC_EOI);
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user