forked from xamidev/pepperOS
92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/*
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* @author xamidev <xamidev@riseup.net>
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* @brief Kernel panic
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* @license GPL-3.0-only
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*/
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#include <stddef.h>
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#include "idt/idt.h"
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#include "io/serial/serial.h"
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#include "kernel.h"
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extern struct init_status init;
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extern int panic_count;
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/*
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* reaf_rflags - provide easy reading of the RFLAGS register
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* @rflags: RFLAGS register value
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*/
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void read_rflags(uint64_t rflags)
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{
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DEBUG("\x1b[38;5;226m%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\x1b[38;5;231m",
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CHECK_BIT(rflags, 0) ? "CF " : "", /*carry flag*/
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CHECK_BIT(rflags, 2) ? "PF " : "", /*parity flag*/
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CHECK_BIT(rflags, 4) ? "AF " : "", /*auxiliary carry flag*/
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CHECK_BIT(rflags, 6) ? "ZF " : "", /*zero flag*/
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CHECK_BIT(rflags, 7) ? "SF " : "", /*sign flag*/
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CHECK_BIT(rflags, 8) ? "TF " : "", /*trap flag*/
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CHECK_BIT(rflags, 9) ? "IF " : "", /*interrupt enable flag*/
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CHECK_BIT(rflags, 10) ? "DF " : "", /*direction flag*/
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CHECK_BIT(rflags, 11) ? "OF " : "", /*overflow flag*/
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(CHECK_BIT(rflags, 12) && CHECK_BIT(rflags, 13)) ? "IOPL3 " : "IOPL0 ", /*io privilege lvl*/
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CHECK_BIT(rflags, 14) ? "NT " : "", /*nested task*/
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CHECK_BIT(rflags, 16) ? "RF " : "", /*resume flag*/
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CHECK_BIT(rflags, 17) ? "VM " : "", /*virtual 8086 mode*/
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CHECK_BIT(rflags, 18) ? "AC " : "", /*alignment check/access control*/
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CHECK_BIT(rflags, 19) ? "VIF " : "", /*virtual interrupt flag*/
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CHECK_BIT(rflags, 20) ? "VIP " : "", /*virtual interrupt pending*/
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CHECK_BIT(rflags, 21) ? "ID " : ""); /*id flag*/
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if (init.terminal) {
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printf("\x1b[38;5;226m%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\x1b[38;5;231m\r\n",
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CHECK_BIT(rflags, 0) ? "CF " : "",
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CHECK_BIT(rflags, 2) ? "PF " : "",
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CHECK_BIT(rflags, 4) ? "AF " : "",
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CHECK_BIT(rflags, 6) ? "ZF " : "",
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CHECK_BIT(rflags, 7) ? "SF " : "",
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CHECK_BIT(rflags, 8) ? "TF " : "",
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CHECK_BIT(rflags, 9) ? "IF " : "",
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CHECK_BIT(rflags, 10) ? "DF " : "",
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CHECK_BIT(rflags, 11) ? "OF " : "",
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(CHECK_BIT(rflags, 12) && CHECK_BIT(rflags, 13)) ? "IOPL3 " : "IOPL0 ",
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CHECK_BIT(rflags, 14) ? "NT " : "",
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CHECK_BIT(rflags, 16) ? "RF " : "",
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CHECK_BIT(rflags, 17) ? "VM " : "",
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CHECK_BIT(rflags, 18) ? "AC " : "",
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CHECK_BIT(rflags, 19) ? "VIF " : "",
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CHECK_BIT(rflags, 20) ? "VIP " : "",
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CHECK_BIT(rflags, 21) ? "ID " : "");
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}
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}
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/*
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* panic - Kernel panic
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* @ctx: CPU context (optional)
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* @str: Error message
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*
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* Ends execution of the kernel in case of an unrecoverable error.
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* Will display to terminal if it is initialized, otherwise serial only.
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* Can be called with or without a CPU context.
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*/
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void panic(struct cpu_status_t* ctx, const char* str)
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{
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CLEAR_INTERRUPTS;
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panic_count += 1;
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if (ctx == NULL) {
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printf("\r\n\x1b[38;5;231m\x1b[48;5;196mKernel panic!!!\x1b[48;5;232m Something went horribly wrong! (no cpu ctx)");
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printf("\r\n%s\r\n\x1b[38;5;231m\x1b[0m", str);
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debug_stack_trace(100);
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hcf();
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}
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printf("\r\n\x1b[38;5;231m\x1b[48;5;196mKernel panic!!!\x1b[48;5;232mat rip=%p\r\nSomething went horribly wrong! (%s) vect=0x%.2x errcode=0x%x\n\rrax=%p rbx=%p rcx=%p rdx=%p\n\rrsi=%p rdi=%p r8=%p r9=%p\n\rr10=%p r11=%p r12=%p r13=%p\n\rr14=%p r15=%p\n\n\rflags=%p ",
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ctx->iret_rip,
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str,
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ctx->vector_number, ctx->error_code, ctx->rax, ctx->rbx, ctx->rcx, ctx->rdx, ctx->rsi, ctx->rdi,
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ctx->r8, ctx->r9, ctx->r10, ctx->r11, ctx->r12, ctx->r13, ctx->r14, ctx->r15, ctx->iret_flags);
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read_rflags(ctx->iret_flags);
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debug_stack_trace(100);
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hcf();
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} |