diff options
Diffstat (limited to 'src/uapi/dispatch.c')
| -rw-r--r-- | src/uapi/dispatch.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/uapi/dispatch.c b/src/uapi/dispatch.c new file mode 100644 index 0000000..5b523cc --- /dev/null +++ b/src/uapi/dispatch.c @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: copyleft-next-0.3.1 */ +/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */ + +/** + * @file dispatch.c + * Syscall dispatch. + */ + +#include <kmi/canary.h> +#include <kmi/debug.h> +#include <kmi/uapi.h> + +/* not sure why doxygen requires these two definitions to state their return + * values, when they don't actually return anything but eh */ + +/** + * Noop syscall handler. + * + * @param t Current tcb. + * + * @return \ref OK and \c 0. + */ +SYSCALL_DEFINE0(noop)(struct tcb *t) +{ + info("sys_noop\n"); + set_args1(t, OK); +} + +/** + * Putch syscall handler. + * + * @param t Current tcb. + * @param a Character to put. + * + * @return \ref OK and 0. + */ +SYSCALL_DEFINE1(putch)(struct tcb *t, sys_arg_t a) +{ + dbg("%c", (char)a); + set_args1(t, OK); +} + +void handle_syscall(sys_arg_t syscall, sys_arg_t a, sys_arg_t b, + sys_arg_t c, sys_arg_t d, sys_arg_t e, struct tcb *t) +{ + adjust_syscall(t); + + switch (syscall) { + case SYS_NOOP: sys_noop(t, a, b, c, d, e); break; + case SYS_PUTCH: sys_putch(t, a, b, c, d, e); break; + case SYS_REQ_MEM: sys_req_mem(t, a, b, c, d, e); break; + case SYS_REQ_PAGE: sys_req_page(t, a, b, c, d, e); break; + case SYS_REQ_PMEM: sys_req_pmem(t, a, b, c, d, e); break; + case SYS_REQ_FIXMEM: sys_req_fixmem(t, a, b, c, d, e); break; + case SYS_REQ_SHAREDMEM: sys_req_sharedmem(t, a, b, c, d, e); break; + case SYS_FREE_MEM: sys_free_mem(t, a, b, c, d, e); break; + case SYS_TIMEBASE: sys_timebase(t, a, b, c, d, e); break; + case SYS_TICKS: sys_ticks(t, a, b, c, d, e); break; + case SYS_REQ_REL_TIMER: sys_req_rel_timer(t, a, b, c, d, e); break; + case SYS_REQ_ABS_TIMER: sys_req_abs_timer(t, a, b, c, d, e); break; + case SYS_IPC_SERVER: sys_ipc_server(t, a, b, c, d, e); break; + case SYS_IPC_REQ: sys_ipc_req(t, a, b, c, d, e); break; + case SYS_IPC_FWD: sys_ipc_fwd(t, a, b, c, d, e); break; + case SYS_IPC_KICK: sys_ipc_kick(t, a, b, c, d, e); break; + case SYS_IPC_RESP: sys_ipc_resp(t, a, b, c, d, e); break; + case SYS_IPC_NOTIFY: sys_ipc_notify(t, a, b, c, d, e); break; + case SYS_CREATE: sys_create(t, a, b, c, d, e); break; + case SYS_FORK: sys_fork(t, a, b, c, d, e); break; + case SYS_EXEC: sys_exec(t, a, b, c, d, e); break; + case SYS_SPAWN: sys_spawn(t, a, b, c, d, e); break; + case SYS_KILL: sys_kill(t, a, b, c, d, e); break; + case SYS_SWAP: sys_swap(t, a, b, c, d, e); break; + case SYS_CONF_SET: sys_conf_set(t, a, b, c, d, e); break; + case SYS_CONF_GET: sys_conf_get(t, a, b, c, d, e); break; + case SYS_SET_CAP: sys_set_cap(t, a, b, c, d, e); break; + case SYS_GET_CAP: sys_get_cap(t, a, b, c, d, e); break; + case SYS_CLEAR_CAP: sys_clear_cap(t, a, b, c, d, e); break; + case SYS_POWEROFF: sys_poweroff(t, a, b, c, d, e); break; + case SYS_IRQ_REQ: sys_irq_req(t, a, b, c, d, e); break; + default: + error("Syscall %zu outside allowed range [0 - %i]\n", syscall, + SYS_NUM - 1); + set_args1(t, ERR_INVAL); + }; + + if (check_canary(t)) { + bug("Syscall %zu overwrote stack canary\n", syscall); + } +} |