From ace65b453151845bc361f21f3e5b651c35f9f126 Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Wed, 22 May 2024 13:00:41 -0400
Subject: massive refactor for mp and organization

---
 syscall/dbg_log.c | 19 +++++++++++++++++++
 syscall/exit.c    | 17 +++++++++++++++++
 syscall/handler.c | 23 +++++++++++++++++++++++
 syscall/handler.h | 19 +++++++++++++++++++
 4 files changed, 78 insertions(+)
 create mode 100644 syscall/dbg_log.c
 create mode 100644 syscall/exit.c
 create mode 100644 syscall/handler.c
 create mode 100644 syscall/handler.h

(limited to 'syscall')

diff --git a/syscall/dbg_log.c b/syscall/dbg_log.c
new file mode 100644
index 0000000..9055498
--- /dev/null
+++ b/syscall/dbg_log.c
@@ -0,0 +1,19 @@
+#include "handler.h"
+#include "print.h"
+#include "umode_vma.h"
+#include "api/errno.h"
+
+int
+_handler_dbg_log(struct sc_dbg_log *u_sc)
+{
+    struct sc_dbg_log sc;
+    if(user_vma_read(&sc, u_sc, sizeof(struct sc_dbg_log)) != 0)
+        return -EFAIL;
+
+    char buf[sc.w];
+    if(user_vma_read(buf, sc.s, sc.w) != 0)
+        return -EFAIL;
+
+    klogf("%s", buf);
+    return 0;
+}
diff --git a/syscall/exit.c b/syscall/exit.c
new file mode 100644
index 0000000..307ea7a
--- /dev/null
+++ b/syscall/exit.c
@@ -0,0 +1,17 @@
+#include "api/syscall.h"
+#include "api/errno.h"
+#include "umode_vma.h"
+#include "arch/processor.h"
+#include "handler.h"
+
+int
+_handler_exit(struct sc_exit *sc)
+{
+    int exit_code = 0;
+    if(user_vma_read(&exit_code, &sc->exit_code, sizeof(int)) != 0)
+        return -EFAIL;
+
+    tcb_t *tcb = tcb_current();
+    tcb_kill(tcb, exit_code);
+    return 0;
+}
diff --git a/syscall/handler.c b/syscall/handler.c
new file mode 100644
index 0000000..5cafdc6
--- /dev/null
+++ b/syscall/handler.c
@@ -0,0 +1,23 @@
+#include "handler.h"
+#include "print.h"
+#include "umode_vma.h"
+#include "api/errno.h"
+
+static void *s_handlers[] = {
+    (void*)_handler_dbg_log,
+    (void*)_handler_exit
+};
+static size_t s_handlers_size = sizeof(s_handlers);
+
+int
+_syscall_handler(void *data)
+{
+    uintmax_t req_id = 0;
+    if(user_vma_read(&req_id, data, sizeof(uintmax_t)) != 0)
+        return -EFAIL;
+
+    if(req_id >= s_handlers_size) return -1;
+    int (*handle)(void*) = (int (*)(void*))s_handlers[req_id];
+    kdbgf("syscall id %i handle %p\n", req_id, handle);
+    return handle(data);
+}
diff --git a/syscall/handler.h b/syscall/handler.h
new file mode 100644
index 0000000..f746dcc
--- /dev/null
+++ b/syscall/handler.h
@@ -0,0 +1,19 @@
+#ifndef _JOVE_SYSCALL_HANDLER_H
+#define _JOVE_SYSCALL_HANDLER_H 1
+
+#include "api/syscall.h"
+#include "memory.h"
+
+int _syscall_handler(void *data);
+
+#define CHECKPTR(p) { \
+    page_mapping_t mapping = vm_mapping_get((uintptr_t)p); \
+    if(mapping.phys == 0 || /* Mapping must not map to NULL phys page. */ \
+       mapping.pf.present == 0 || /* Mapping must be present. */\
+       mapping.pf.useraccess == 0 /* Mapping must be useraccess. */) \
+    return -1; }
+
+int _handler_dbg_log(struct sc_dbg_log *sc);
+int _handler_exit(struct sc_exit *sc);
+
+#endif
-- 
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