118 lines
2.3 KiB
C++
118 lines
2.3 KiB
C++
#include <kernel/Debug.h>
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#include <kernel/Process.h>
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#include <kernel/Syscall.h>
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namespace Kernel
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{
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void sys_exit()
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{
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Process::current().exit();
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}
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long sys_read(int fd, void* buffer, size_t size)
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{
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auto res = Process::current().read(fd, buffer, size);
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if (res.is_error())
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return -res.error().get_error_code();
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return res.value();
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}
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long sys_write(int fd, const void* buffer, size_t size)
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{
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auto res = Process::current().write(fd, buffer, size);
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if (res.is_error())
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return -res.error().get_error_code();
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return res.value();
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}
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int sys_close(int fd)
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{
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auto res = Process::current().close(fd);
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if (res.is_error())
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return -res.error().get_error_code();
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return 0;
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}
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int sys_seek(int fd, long offset)
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{
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auto res = Process::current().seek(fd, offset);
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if (res.is_error())
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return -res.error().get_error_code();
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return 0;
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}
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void sys_termid(char* buffer)
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{
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Process::current().termid(buffer);
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}
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int sys_open(const char* path, int oflags)
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{
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auto res = Process::current().open(path, oflags);
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if (res.is_error())
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return -res.error().get_error_code();
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return res.value();
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}
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long sys_alloc(size_t bytes)
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{
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auto res = Process::current().allocate(bytes);
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if (res.is_error())
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return -res.error().get_error_code();
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return (long)res.value();
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}
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void sys_free(void* ptr)
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{
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Process::current().free(ptr);
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}
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extern "C" long cpp_syscall_handler(int syscall, void* arg1, void* arg2, void* arg3)
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{
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Thread::current().set_in_syscall(true);
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asm volatile("sti");
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long ret = 0;
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switch (syscall)
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{
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case SYS_EXIT:
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sys_exit();
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break;
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case SYS_READ:
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ret = sys_read((int)(uintptr_t)arg1, arg2, (size_t)(uintptr_t)arg3);
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break;
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case SYS_WRITE:
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ret = sys_write((int)(uintptr_t)arg1, arg2, (size_t)(uintptr_t)arg3);
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break;
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case SYS_TERMID:
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sys_termid((char*)arg1);
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break;
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case SYS_CLOSE:
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ret = sys_close((int)(uintptr_t)arg1);
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break;
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case SYS_SEEK:
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ret = sys_seek((int)(uintptr_t)arg1, (long)arg2);
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break;
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case SYS_OPEN:
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ret = sys_open((const char*)arg1, (int)(uintptr_t)arg2);
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break;
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case SYS_ALLOC:
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ret = sys_alloc((size_t)arg1);
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break;
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case SYS_FREE:
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sys_free(arg1);
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break;
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default:
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Kernel::panic("Unknown syscall {}", syscall);
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}
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asm volatile("cli");
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Thread::current().set_in_syscall(false);
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return ret;
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}
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} |