apio
da2ede3450
Kernel: Implement a descriptor struct which stores the opened node and read offset, and give each task 8 of those. Implement three syscalls: sys_read, sys_open and sys_close (sys_write still writes to the console instead of using a fd, for now) Implement three new errors: ENOENT, EBADF and EMFILE. libc: Implement the new errors, and the new syscalls in syscall(). Also fix _RETURN_WITH_ERRNO() to set errno correctly, which was making strerror() return null, thus crashing perror(). userspace: make init demonstrate the new file API.
50 lines
881 B
C
50 lines
881 B
C
#pragma once
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#include "fs/FileDescriptor.h"
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#include "interrupts/Context.h"
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#include "sys/elf/Image.h"
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#define TASK_MAX_FDS 8
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struct Task
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{
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enum TaskState
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{
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Idle,
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Running,
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Sleeping,
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Exited
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};
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uint64_t id;
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Context regs;
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int64_t task_sleep = 0;
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int64_t exit_status;
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int64_t task_time = 0;
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Task* next_task = nullptr;
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Task* prev_task = nullptr;
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uint64_t allocated_stack = 0;
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TaskState state;
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uint64_t cpu_time = 0;
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char floating_region[512] __attribute__((aligned(16)));
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bool floating_saved = false;
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bool is_user_task();
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ELFImage* image = nullptr;
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Descriptor files[TASK_MAX_FDS];
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};
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void set_context_from_task(Task& task, Context* ctx);
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void get_context_to_task(Task& task, Context* ctx);
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void task_save_floating(Task& task);
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void task_restore_floating(Task& task); |