Added sysinit/exit code similar to libctru, with updated crt0. Moved svcExitProcess into the library. Changed HEAP_SIZE. Adjusted some svc.s formatting. Added svcGetInfo. Added svcSleepThread, device SVCs, svcCallSecureMonitor, and the struct for svcCallSecureMonitor, based on code from naehrwert.

crt0/switch_crt0.s

@@ -40,7 +40,7 @@ got_loop:
     subs x1, x1, #8
     bne  got_loop
 
-    ldr  x3, =heapSetup
+    ldr  x3, =initSystem
     add  x3, x3, x28
     blr  x3
 
@@ -49,7 +49,8 @@ got_loop:
 
     ldr  x3, =main
     add  x3, x3, x28
-    blr  x3
+    ldr  x2, =__nx_exit
+    add  x2, x2, x28
+    mov  x30, x2
+    br  x3
 
-_sysexit:
-    svc  0x7

nx/Makefile

@@ -24,7 +24,7 @@ VERSION	:=	$(LIBNX_MAJOR).$(LIBNX_MINOR).$(LIBNX_PATCH)
 #---------------------------------------------------------------------------------
 TARGET		:=	nx
 #BUILD		:=	build
-SOURCES		:=	source/kernel source/services source/heap
+SOURCES		:=	source/system source/kernel source/services source/heap
 
 DATA		:=	data
 INCLUDES	:=	include

nx/include/switch/svc.h

@@ -18,16 +18,37 @@ static inline void* armGetTls(void) {
     return ret;
 }
 
+typedef struct _regs_t
+{
+	u64 X0;
+	u64 X1;
+	u64 X2;
+	u64 X3;
+	u64 X4;
+	u64 X5;
+	u64 X6;
+	u64 X7;
+} __attribute__((packed)) regs_t;
+
 Result svcSetHeapSize(void** out_addr, u64 size);
 Result svcQueryMemory(u32 *meminfo_ptr, u32 *pageinfo, u64 addr);
+void svcExitProcess() __attribute__((noreturn));
+Result svcSleepThread(u64 nano);
 Result svcCloseHandle(Handle handle);
 Result svcCreateTransferMemory(Handle* out, void* addr, size_t size, u32 perm);
 Result svcWaitSynchronization(s32* index, const Handle* handles, s32 handleCount, u64 timeout);
 Result svcConnectToNamedPort(Handle* session, const char* name);
 Result svcSendSyncRequest(Handle session);
 Result svcBreak(u32 breakReason, u64 inval1, u64 inval2);
+Result svcGetInfo(u64* out, u64 id0, Handle handle, u64 id1);
 Result svcAcceptSession(Handle *session_handle, Handle port_handle);
 Result svcReplyAndReceive(s32* index, const Handle* handles, s32 handleCount, Handle replyTarget, u64 timeout);
 Result svcQueryPhysicalAddress(u64 out[3], u64 virtaddr);
 Result svcQueryIoMapping(u64* virtaddr, u64 physaddr, u64 size);
+Result svcCreateDeviceAddressSpace(Handle *handle, u64 dev_addr, u64 dev_size);
+Result svcAttachDeviceAddressSpace(u64 device, Handle handle);
+Result svcDetachDeviceAddressSpace(u64 device, Handle handle);
+Result svcMapDeviceAddressSpaceAligned(Handle handle, Handle proc_handle, u64 dev_addr, u64 dev_size, u64 map_addr, u64 perm);
+Result svcUnmapDeviceAddressSpace(Handle handle, Handle proc_handle, u64 map_addr, u64 map_size, u64 perm);
+u64 svcCallSecureMonitor(regs_t *regs);
 Result svcManageNamedPort(Handle* portServer, const char* name, s32 maxSessions);

nx/source/heap/heap.c

@@ -32,7 +32,7 @@ void heapInit(void* base, size_t size) {
 
 void heapSetup() {
     // Called by crt0.
-    #define HEAP_SIZE 0x2000000
+    #define HEAP_SIZE 0x1000000
     static u8 g_Heap[HEAP_SIZE];
     heapInit(&g_Heap[0], HEAP_SIZE);
 }

nx/source/kernel/svc.s

@@ -13,7 +13,7 @@
 
 SVC_BEGIN svcSetHeapSize
 	str x0, [sp, #-16]!
-	svc 1
+	svc 0x1
 	ldr x2, [sp], #16
 	str x1, [x2]
 	ret
@@ -27,6 +27,16 @@ SVC_BEGIN svcQueryMemory
 	ret
 SVC_END
 
+SVC_BEGIN svcExitProcess
+	svc  0x7
+	ret
+SVC_END
+
+SVC_BEGIN svcSleepThread
+	svc 0xB
+	ret
+SVC_END
+
 SVC_BEGIN svcCloseHandle
 	svc 0x16
 	ret
@@ -50,7 +60,7 @@ SVC_END
 
 SVC_BEGIN svcConnectToNamedPort
 	str x0, [sp, #-16]!
-	svc 0x1f
+	svc 0x1F
 	ldr x2, [sp], #16
 	str w1, [x2]
 	ret
@@ -66,6 +76,14 @@ SVC_BEGIN svcBreak
 	ret
 SVC_END
 
+SVC_BEGIN svcGetInfo
+	str x0, [sp, #-16]!
+	svc 0x29
+	ldr x2, [sp], #16
+	str x1, [x2]
+	ret
+SVC_END
+
 SVC_BEGIN svcAcceptSession
 	str x0, [sp, #-16]!
 	svc 0x41
@@ -100,6 +118,35 @@ SVC_BEGIN svcQueryIoMapping
 	ret
 SVC_END
 
+SVC_BEGIN svcCreateDeviceAddressSpace
+	str x0, [sp, #-16]!
+	svc 0x56
+	ldr x2, [sp]
+	str w1, [x2]
+	add sp, sp, #0x10
+	ret
+SVC_END
+
+SVC_BEGIN svcAttachDeviceAddressSpace
+	svc 0x57
+	ret
+SVC_END
+
+SVC_BEGIN svcDetachDeviceAddressSpace
+	svc 0x58
+	ret
+SVC_END
+
+SVC_BEGIN svcMapDeviceAddressSpaceAligned
+	svc 0x5A
+	ret
+SVC_END
+
+SVC_BEGIN svcUnmapDeviceAddressSpace
+	svc 0x5C
+	ret
+SVC_END
+
 SVC_BEGIN svcManageNamedPort
 	str x0, [sp, #-16]!
 	svc 0x71
@@ -107,3 +154,21 @@ SVC_BEGIN svcManageNamedPort
 	str w1, [x2]
 	ret
 SVC_END
+
+SVC_BEGIN svcCallSecureMonitor
+	str x0, [sp, #-16]!
+	mov x8, x0
+	ldp x0, x1, [x8]
+	ldp x2, x3, [x8, #0x10]
+	ldp x4, x5, [x8, #0x20]
+	ldp x6, x7, [x8, #0x30]
+	svc 0x7F
+	ldr x8, [SP]
+	stp x0, x1, [x8]
+	stp x2, x3, [x8, #0x10]
+	stp x4, x5, [x8, #0x20]
+	stp x6, x7, [x8, #0x30]
+	add sp, sp, #0x10
+	ret
+SVC_END
+

nx/source/system/appExit.c

@@ -0,0 +1,5 @@
+#include <switch/types.h>
+
+void __attribute__((weak)) __appExit(void) {
+	// Initialize services
+}

nx/source/system/appInit.c

@@ -0,0 +1,5 @@
+#include <switch/types.h>
+
+void __attribute__((weak)) __appInit(void) {
+	// Initialize services
+}

nx/source/system/initSystem.c

@@ -0,0 +1,18 @@
+#include <sys/iosupport.h>
+#include <sys/time.h>
+#include <string.h>
+
+#include <switch/types.h>
+#include <switch/svc.h>
+
+void __system_initSyscalls(void);
+
+void heapSetup();
+
+void __attribute__((weak)) __libnx_init(void)
+{
+	// Initialize newlib support system calls
+	__system_initSyscalls();
+
+	heapSetup();
+}

nx/source/system/nx_exit.c

@@ -0,0 +1,7 @@
+#include <switch/types.h>
+#include <switch/svc.h>
+
+void __attribute__((weak)) __attribute__((noreturn)) __libnx_exit(int rc)
+{
+	svcExitProcess();
+}

nx/source/system/syscalls.c

@@ -0,0 +1,46 @@
+#include <sys/iosupport.h>
+#include <sys/time.h>
+#include <sys/lock.h>
+#include <sys/reent.h>
+#include <string.h>
+
+#include <switch/types.h>
+#include <switch/svc.h>
+
+void __nx_exit(int rc);
+
+//TODO
+/*extern const u8 __tdata_lma[];
+extern const u8 __tdata_lma_end[];
+extern u8 __tls_start[];
+
+static struct _reent* __nx_get_reent()
+{
+	ThreadVars* tv = getThreadVars();
+	if (tv->magic != THREADVARS_MAGIC)
+	{
+		svcBreak(USERBREAK_PANIC);
+		for (;;);
+	}
+	return tv->reent;
+}
+*/
+
+void __system_initSyscalls(void)
+{
+	// Register newlib syscalls
+	__syscalls.exit     = __nx_exit;
+	//__syscalls.getreent = __nx_get_reent;
+
+	// Initialize thread vars for the main thread (TODO)
+	/*ThreadVars* tv = getThreadVars();
+	tv->magic = THREADVARS_MAGIC;
+	tv->reent = _impure_ptr;
+	tv->thread_ptr = NULL;
+	tv->tls_tp = __tls_start-8; // ARM ELF TLS ABI mandates an 8-byte header
+
+	u32 tls_size = __tdata_lma_end - __tdata_lma;
+	if (tls_size)
+		memcpy(__tls_start, __tdata_lma, tls_size);*/
+}
+

nx/source/system/sysinit.s

@@ -0,0 +1,21 @@
+	.global	initSystem
+	.type	initSystem,	%function
+
+initSystem:
+	stp x29, x30, [sp, #-16]!
+	bl	__libnx_init
+
+	bl	__appInit
+	//bl	__libc_init_array //Currently broken since this doesn't use .got.
+	ldp x29, x30, [sp], #16
+	ret
+
+	.global	__nx_exit
+	.type	__nx_exit,	%function
+
+__nx_exit:
+	//bl	__libc_fini_array//See above.
+	bl	__appExit
+
+	b	__libnx_exit
+