diff options
Diffstat (limited to 'cpu/syscall.c')
| -rw-r--r-- | cpu/syscall.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/cpu/syscall.c b/cpu/syscall.c deleted file mode 100644 index 4978732..0000000 --- a/cpu/syscall.c +++ /dev/null @@ -1,183 +0,0 @@ -// FIXME: Make sure that the args variabel actually points to something -// valid. -#include <assert.h> -#include <cpu/syscall.h> -#include <drivers/pst.h> -#include <errno.h> -#include <fs/tmpfs.h> -#include <fs/vfs.h> -#include <kmalloc.h> -#include <scalls/accept.h> -#include <scalls/bind.h> -#include <scalls/ftruncate.h> -#include <scalls/kill.h> -#include <scalls/mkdir.h> -#include <scalls/mmap.h> -#include <scalls/msleep.h> -#include <scalls/ppoll.h> -#include <scalls/recvfrom.h> -#include <scalls/sendto.h> -#include <scalls/shm.h> -#include <scalls/socket.h> -#include <scalls/stat.h> -#include <scalls/uptime.h> -#include <scalls/sigaction.h> -#include <stdint.h> -#include <string.h> - -#pragma GCC diagnostic ignored "-Wpedantic" - -int syscall_open(SYS_OPEN_PARAMS *args) { - char file[256]; - strcpy(file, args->file); - // const char *file = copy_and_allocate_user_string(args->file); - int flags = args->flags; - int mode = args->mode; - int rc = vfs_open(file, flags, mode); - // kfree((void *)file); - return rc; -} - -int syscall_exec(SYS_EXEC_PARAMS *args) { - const char *filename = copy_and_allocate_user_string(args->path); - - int argc = 0; - for (; args->argv[argc];) { - argc++; - } - - char **new_argv = kallocarray(argc + 1, sizeof(char *)); - for (int i = 0; i < argc; i++) - new_argv[i] = copy_and_allocate_user_string(args->argv[i]); - - new_argv[argc] = NULL; - - exec(filename, new_argv); - kfree((void *)filename); - for (int i = 0; i < argc; i++) - kfree(new_argv[i]); - kfree(new_argv); - return -1; -} - -int syscall_pipe(int fd[2]) { - pipe(fd); // FIXME: Error checking - return 0; -} - -int syscall_pread(SYS_PREAD_PARAMS *args) { - return vfs_pread(args->fd, args->buf, args->count, args->offset); -} - -int syscall_read(SYS_READ_PARAMS *args) { - if (!get_vfs_fd(args->fd)) - return -EBADF; - int rc = vfs_pread(args->fd, args->buf, args->count, - get_current_task()->file_descriptors[args->fd]->offset); - get_current_task()->file_descriptors[args->fd]->offset += rc; - return rc; -} - -int syscall_pwrite(SYS_PWRITE_PARAMS *args) { - return vfs_pwrite(args->fd, args->buf, args->count, args->offset); -} - -int syscall_write(int fd, const char *buf, size_t count) { - if (!get_vfs_fd(fd)) - return -EBADF; - int rc = vfs_pwrite(fd, (char *)buf, count, - get_current_task()->file_descriptors[fd]->offset); - get_current_task()->file_descriptors[fd]->offset += rc; - return rc; -} - -int syscall_dup2(SYS_DUP2_PARAMS *args) { - return vfs_dup2(args->org_fd, args->new_fd); -} - -void syscall_exit(int status) { - exit(status); - assert(0); -} - -void syscall_wait(int *status) { - asm("cli"); - if (!get_current_task()->child) { - if (status) - *status = -1; - return; - } - if (get_current_task()->child->dead) { - if (status) - *status = get_current_task()->child_rc; - return; - } - get_current_task()->halts[WAIT_CHILD_HALT] = 1; - switch_task(); - if (status) - *status = get_current_task()->child_rc; -} - -int syscall_fork(void) { return fork(); } - -int syscall_getpid(void) { return get_current_task()->pid; } - -void *align_page(void *a); - -int syscall_brk(void *addr) { - void *end = get_current_task()->data_segment_end; - if (!mmu_allocate_region(end, addr - end, MMU_FLAG_RW, NULL)) - return -ENOMEM; - get_current_task()->data_segment_end = align_page(addr); - return 0; -} - -void *syscall_sbrk(uintptr_t increment) { - asm("cli"); - void *rc = get_current_task()->data_segment_end; - void *n = - (void *)((uintptr_t)(get_current_task()->data_segment_end) + increment); - int rc2; - if (0 > (rc2 = syscall_brk(n))) - return (void *)rc2; - return rc; -} - -int syscall_close(int fd) { return vfs_close(fd); } - -int syscall_openpty(SYS_OPENPTY_PARAMS *args) { - assert(is_valid_userpointer(args, sizeof(SYS_OPENPTY_PARAMS))); - return openpty(args->amaster, args->aslave, args->name, args->termp, - args->winp); -} - -void (*syscall_functions[])() = { - (void(*))syscall_open, (void(*))syscall_read, - (void(*))syscall_write, (void(*))syscall_pread, - (void(*))syscall_pwrite, (void(*))syscall_fork, - (void(*))syscall_exec, (void(*))syscall_getpid, - (void(*))syscall_exit, (void(*))syscall_wait, - (void(*))syscall_brk, (void(*))syscall_sbrk, - (void(*))syscall_pipe, (void(*))syscall_dup2, - (void(*))syscall_close, (void(*))syscall_openpty, - (void(*))syscall_poll, (void(*))syscall_mmap, - (void(*))syscall_accept, (void(*))syscall_bind, - (void(*))syscall_socket, (void(*))syscall_shm_open, - (void(*))syscall_ftruncate, (void(*))syscall_stat, - (void(*))syscall_msleep, (void(*))syscall_uptime, - (void(*))syscall_mkdir, (void(*))syscall_recvfrom, - (void(*))syscall_sendto, (void(*))syscall_kill, - (void(*))syscall_sigaction, -}; - -void syscall_function_handler(uint32_t eax, uint32_t arg1, uint32_t arg2, - uint32_t arg3, uint32_t arg4, uint32_t arg5) { - assert(eax < sizeof(syscall_functions) / sizeof(syscall_functions[0])); - syscall_functions[eax](arg1, arg2, arg3, arg4, arg5); -} - -extern void int_syscall(void); - -void syscalls_init(void) { - install_handler(int_syscall, INT_32_INTERRUPT_GATE(0x3), 0x80); -} |