[libc] Created syscall trampolines in libc

Using syscalls.inc (moved to src/include) generate trampoline functions
for directly calling syscalls with libc functions.

src/drivers/nulldrv/main.cpp

@@ -5,53 +5,38 @@
 #include "j6/errors.h"
 #include "j6/signals.h"
 
+#include <j6libc/syscalls.h>
+
 const char message[] = "Hello! This is a message being sent over a channel!";
 char inbuf[1024];
 j6_handle_t chan = j6_handle_invalid;
 
 extern "C" {
-	j6_status_t system_log(const char *msg);
-
-	j6_status_t object_wait(j6_handle_t obj, j6_signal_t sig, j6_signal_t *out);
-	j6_status_t object_signal(j6_handle_t obj, j6_signal_t sig);
-
-	j6_status_t process_koid(j6_koid_t *koid);
-
-	j6_status_t thread_koid(j6_koid_t *koid);
-	j6_status_t thread_create(void (*koid)(), j6_handle_t *handle);
-	j6_status_t thread_sleep(uint64_t til);
-	j6_status_t thread_exit(int64_t status);
-
-	j6_status_t channel_create(j6_handle_t *handle);
-	j6_status_t channel_close(j6_handle_t handle);
-	j6_status_t channel_send(j6_handle_t handle, size_t len, void *data);
-	j6_status_t channel_receive(j6_handle_t handle, size_t *len, void *data);
-
 	int main(int, const char **);
 }
 
 void
 thread_proc()
 {
-	system_log("sub thread starting");
+	_syscall_system_log("sub thread starting");
 
-	j6_status_t result = object_signal(chan, j6_signal_user0);
+	j6_status_t result = _syscall_object_signal(chan, j6_signal_user0);
 	if (result != j6_status_ok)
-		thread_exit(result);
+		_syscall_thread_exit(result);
 
-	system_log("sub thread signaled user0");
+	_syscall_system_log("sub thread signaled user0");
 
-	result = channel_send(chan, sizeof(message), (void*)message);
+	result = _syscall_channel_send(chan, sizeof(message), (void*)message);
 	if (result != j6_status_ok)
-		thread_exit(result);
+		_syscall_thread_exit(result);
 
-	system_log("sub thread sent on channel");
+	_syscall_system_log("sub thread sent on channel");
 
 	for (int i = 1; i < 5; ++i)
-		thread_sleep(i*10);
+		_syscall_thread_sleep(i*10);
 
-	system_log("sub thread exiting");
-	thread_exit(0);
+	_syscall_system_log("sub thread exiting");
+	_syscall_thread_exit(0);
 }
 
 int
@@ -60,32 +45,32 @@ main(int argc, const char **argv)
 	j6_handle_t child = j6_handle_invalid;
 	j6_signal_t out = 0;
 
-	system_log("main thread starting");
+	_syscall_system_log("main thread starting");
 
-	j6_status_t result = channel_create(&chan);
+	j6_status_t result = _syscall_channel_create(&chan);
 	if (result != j6_status_ok)
 		return result;
 
-	system_log("main thread created channel");
+	_syscall_system_log("main thread created channel");
 
-	result = thread_create(&thread_proc, &child);
+	result = _syscall_thread_create(reinterpret_cast<void*>(&thread_proc), &child);
 	if (result != j6_status_ok)
 		return result;
 
-	system_log("main thread waiting on user0");
+	_syscall_system_log("main thread waiting on user0");
 
-	result = object_wait(chan, j6_signal_user0, &out);
+	result = _syscall_object_wait(chan, j6_signal_user0, &out);
 	if (result != j6_status_ok)
 		return result;
 
-	system_log("main thread waiting on can_recv");
+	_syscall_system_log("main thread waiting on can_recv");
 
-	result = object_wait(chan, j6_signal_channel_can_recv, &out);
+	result = _syscall_object_wait(chan, j6_signal_channel_can_recv, &out);
 	if (result != j6_status_ok)
 		return result;
 
 	size_t len = sizeof(inbuf);
-	result = channel_receive(chan, &len, (void*)inbuf);
+	result = _syscall_channel_receive(chan, &len, (void*)inbuf);
 	if (result != j6_status_ok)
 		return result;
 
@@ -94,21 +79,21 @@ main(int argc, const char **argv)
 			return 127;
 	}
 
-	system_log("main thread received on channel");
+	_syscall_system_log("main thread received on channel");
 
-	system_log("main thread waiting on child");
+	_syscall_system_log("main thread waiting on child");
 
-	result = object_wait(child, -1ull, &out);
+	result = _syscall_object_wait(child, -1ull, &out);
 	if (result != j6_status_ok)
 		return result;
 
-	result = channel_close(chan);
+	result = _syscall_channel_close(chan);
 	if (result != j6_status_ok)
 		return result;
 
-	system_log("main thread closed channel");
+	_syscall_system_log("main thread closed channel");
 
-	system_log("main thread done, exiting");
+	_syscall_system_log("main thread done, exiting");
 	return 0;
 }
 

src/drivers/nulldrv/main.s

@@ -7,35 +7,6 @@ extern exit
 
 section .text
 
-%macro SYSCALL 2
-	global %1
-	%1:
-		push rbp
-		mov rbp, rsp
-
-		; address of args should already be in rdi, etc
-		mov rax, %2
-		syscall
-		; result is now already in rax, so just return
-
-		pop rbp
-		ret
-%endmacro
-
-SYSCALL system_log, 0x00
-SYSCALL object_wait, 0x09
-SYSCALL object_signal, 0x0a
-SYSCALL process_koid, 0x10
-SYSCALL thread_koid, 0x18
-SYSCALL thread_create, 0x19
-SYSCALL thread_exit, 0x1a
-SYSCALL thread_pause, 0x1b
-SYSCALL thread_sleep, 0x1c
-SYSCALL channel_create, 0x20
-SYSCALL channel_close, 0x21
-SYSCALL channel_send, 0x22
-SYSCALL channel_receive, 0x23
-
 global _start
 _start:
 	xor rbp, rbp	; Sentinel rbp

src/libraries/libc/arch/x86_64/syscalls.s

@@ -0,0 +1,21 @@
+%macro SYSCALL 2
+	global _syscall_%1
+	_syscall_%1:
+		push rbp
+		mov rbp, rsp
+
+		; address of args should already be in rdi, etc
+		mov rax, %2
+		syscall
+		; result is now already in rax, so just return
+
+		pop rbp
+		ret
+%endmacro
+
+%define SYSCALL(n, name) SYSCALL name, n
+%define SYSCALL(n, name, a) SYSCALL name, n
+%define SYSCALL(n, name, a, b) SYSCALL name, n
+%define SYSCALL(n, name, a, b, c) SYSCALL name, n
+
+%include "syscalls.inc"

src/libraries/libc/include/j6libc/syscalls.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SYSCALL(n, name, ...) j6_status_t _syscall_ ## name (__VA_ARGS__);
+#include "syscalls.inc"
+#undef SYSCALL
+
+#ifdef __cplusplus
+}
+#endif