rename common to src

+ I keep starting to type src and wondering why autocomplete won't work,
  I guess src is just uncounciously a better name

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);
+	}
+}