fix elf stack issues and interrupt gsbase stuff

Makefile

@@ -28,7 +28,12 @@ $(KERNEL): srcdir $(KERNELSRCDEPS) kernel.ld
 	mkdir -p $(ISO)
 	$(CC) $(LDFLAGS) -o $@ $(call rwildcard,bin,*.o)
 
-$(INITRD): initrd
+.phony: rebuildinitrd
+rebuildinitrd:
+	rm $(INITRD)
+	cd initrd;tar -cf $(INITRD) *
+
+$(INITRD): $(shell find initrd)
 	cd initrd;tar -cf $(INITRD) *
 
 sysdisk.iso: $(ISO) $(INITRD)

src/arch/x86_64/isr.asm

@@ -20,7 +20,15 @@ section .text
 	push rbx
 	push rax
 	
+
+
 	mov rax, ds
+
+	cmp rax,0x43
+	je .noswapgs
+	swapgs
+	.noswapgs:
+
 	push rax
 	mov rax, es
 	push rax
@@ -28,12 +36,13 @@ section .text
 	push rax
 	mov rax, gs
 	push rax
+	
+	; now use kernel segments for data
 
-	cmp rax,0x43
-	jmp .noswapgs
-	swapgs
-	.noswapgs:
-
+	mov rax, 0x30
+	mov ds, rax
+	mov es, rax
+	mov ss, rax
 	mov rdi,cr2
 	push rdi
 

src/arch/x86_64/panic.c

@@ -34,7 +34,7 @@ __attribute((noreturn)) void _panic(char* reason, arch_regs *reg){
 
 		printf("Panic location: %p\n", reg->rip);
 		
-		if(reg->rbp != 0){
+		if(reg->rbp != 0 && reg->cs == 0x28){
 			printf("Stack trace:\n");
 			tracestack((uint64_t**)reg->rbp);
 		}

src/fs/tmpfs.c

@@ -68,7 +68,7 @@ static int tmpfs_read(int *error, vnode_t* node, void* buff, size_t count, size_
 }
 
 static int tmpfs_unmount(fs_t* fs) UNIMPLEMENTED
-static int tmpfs_open(dirnode_t* parent, char* name) UNIMPLEMENTED
+static int tmpfs_open(dirnode_t* parent, char* name){ return ENOENT;} // tmpfs open should never be called if a file exists
 static int tmpfs_close(vnode_t* node) UNIMPLEMENTED
 
 static int tmpfs_mkdir(dirnode_t* parent, char* name, mode_t mode){

src/include/errno.h

@@ -8,6 +8,7 @@
 #define ENOSYS  5
 #define EEXIST  6
 #define ENOENT  7
-
+#define EACCES  8
+#define EAGAIN  9
 
 #endif

src/include/sys/stat.h

@@ -24,7 +24,7 @@ typedef struct {
 	gid_t	st_gid;
 	dev_t	st_rdev;
 	off_t	st_size;
-
+	
 	blksize_t st_blksize;
 	blkcnt_t  st_blocks;
 } stat;

src/include/sys/types.h

@@ -14,7 +14,7 @@ typedef id_t	pid_t;
 typedef id_t	uid_t;
 typedef id_t	tid_t;
 typedef size_t	ino_t;
-typedef size_t	mode_t;
+typedef int	mode_t;
 typedef	int	dev_t;
 typedef	ssize_t	off_t;
 typedef size_t	nlink_t;

src/sys/sched/elf.c

@@ -100,12 +100,17 @@ static void* stacksetup(char* interp, char** argv, char** env){
 	char** argstart = (void*)envstart - (argc + 1)*sizeof(char*);
 	if(interp)
 		--argstart;
-	size_t* argcptr = (void*)argstart - sizeof(size_t);
+	char*** envpptr = (void*)argstart - sizeof(char**);
+	char*** argvptr = (void*)envpptr - sizeof(char**);
+	size_t* argcptr = (void*)argvptr - sizeof(size_t);
 	
 	// XXX auxv
 
 	// copy the data
-	
+
+	*envpptr = envstart;
+	*argvptr = argstart;
+
 	if(interp){
 		strcpy(argdatastart, interp);
 		*argstart++ = argdatastart;
@@ -126,9 +131,13 @@ static void* stacksetup(char* interp, char** argv, char** env){
 		envdatastart += strlen(env[i]) + 1;
 	}
 
+	*envstart = NULL;
+
 	if(interp)
 		argc++;
+	
 	*argcptr = argc;
+
 	
 
 	return argcptr;