bugfixes, change types.h to be linux abi, stat system call

Makefile

@@ -44,5 +44,8 @@ sysdisk.iso: $(ISO) $(INITRD)
 test: $(KERNEL) sysdisk.iso
 	qemu-system-x86_64 -monitor stdio -cdrom sysdisk.iso -d int -no-reboot -no-shutdown -m 8G -smp cpus=6
 
+kvm: $(KERNEL) sysdisk.iso
+	qemu-system-x86_64 -monitor stdio -cdrom sysdisk.iso -no-reboot -no-shutdown -m 8G -smp cpus=6 -enable-kvm
+
 clean:
 	rm $(call rwildcard,src,*.o) $(KERNELDEPS)

src/arch/x86_64/syscall.asm

@@ -11,7 +11,8 @@ extern syscall_lseek
 extern syscall_close
 extern syscall_isatty
 extern syscall_write
-func_count equ 10
+extern syscall_stat
+func_count equ 11
 
 
 func_table:
@@ -25,6 +26,7 @@ func_table:
 	dq syscall_close
 	dq syscall_isatty
 	dq syscall_write
+	dq syscall_stat
 section .text
 global asm_syscall_entry
 

src/include/sys/stat.h

@@ -15,18 +15,30 @@
 #define GETTYPE(m) ((m >> 12) & 0xF)
 #define MAKETYPE(m) ((m & 0xF) << 12)
 
+typedef long time_t;
+
+struct timespec {
+        time_t tv_sec;
+        long tv_nsec;
+};
+
+
 typedef struct {
-	dev_t	st_dev;
+        dev_t st_dev;
-	ino_t	st_ino;
+        ino_t st_ino;
-	mode_t	st_mode;
+        nlink_t st_nlink;
-	nlink_t	st_nlink;
+        mode_t st_mode;
-	uid_t	st_uid;
+        uid_t st_uid;
-	gid_t	st_gid;
+        gid_t st_gid;
-	dev_t	st_rdev;
+        unsigned int __pad0;
-	off_t	st_size;
+        dev_t st_rdev;
-	
+        off_t st_size;
-	blksize_t st_blksize;
+        blksize_t st_blksize;
-	blkcnt_t  st_blocks;
+        blkcnt_t st_blocks;
+        struct timespec st_atim;
+        struct timespec st_mtim;
+        struct timespec st_ctim;
+        long __unused[3];
 } stat;
 
 #endif

src/include/sys/types.h

@@ -8,14 +8,14 @@ typedef signed long ssize_t;
 typedef size_t 	blkcnt_t;
 typedef size_t 	blksize_t;
 typedef int	id_t;
-typedef id_t	dev_t;
+typedef long	dev_t;
 typedef id_t	gid_t;
 typedef id_t	pid_t;
 typedef id_t	uid_t;
-typedef id_t	tid_t;
+typedef pid_t	tid_t;
 typedef size_t	ino_t;
 typedef int	mode_t;
-typedef	int	dev_t;
+typedef	long	dev_t;
 typedef	ssize_t	off_t;
 typedef size_t	nlink_t;
 

src/sys/mm/alloc.c

@@ -11,7 +11,7 @@ void* alloc(size_t size){
 }
 
 void free(void* addr){
-	if(pageallocator_free(addr))
+	if(!pageallocator_free(addr))
 		slab_free(addr);
 }
 

src/sys/mm/slab.c

@@ -56,7 +56,8 @@ size_t slab_getentrysize(void* addr){
 }
 
 static void free(void* addr){
-	
+	if(addr == 0)
+		return;
 	// align down to page size
 	
 	slab_t *slab = (size_t)addr & ~(0xFFF);

src/sys/sched/elf.c

@@ -71,12 +71,6 @@ static void* stacksetup(char* interp, char** argv, char** env, elf_header64 head
 		++envc;
 	}
 	
-	if(interp){
-		argdatasize += strlen(interp) + 1;
-		initialsize += strlen(interp) + 1;
-		initialsize += sizeof(char*); // interpreter ptr
-	}
-	
 	// pointers to args and envs
 
 	initialsize += argc*sizeof(char*); //args
@@ -97,8 +91,6 @@ static void* stacksetup(char* interp, char** argv, char** env, elf_header64 head
 	// count + 1 because of a null entry
 	char** envstart = (void*)auxvstart - (envc + 1)*sizeof(char*);
 	char** argstart = (void*)envstart - (argc + 1)*sizeof(char*);
-	if(interp)
-		--argstart;
 	
 	size_t* argcptr = (void*)argstart - sizeof(size_t);
 	
@@ -136,12 +128,6 @@ static void* stacksetup(char* interp, char** argv, char** env, elf_header64 head
 	// copy the data
 
 
-	if(interp){
-		strcpy(argdatastart, interp);
-		*argstart++ = argdatastart;
-		argdatastart += strlen(interp) + 1;
-	}
-
 	for(size_t i = 0; i < argc; ++i){
 		strcpy(argdatastart, argv[i]);
 		*argstart++ = argdatastart;
@@ -158,9 +144,6 @@ static void* stacksetup(char* interp, char** argv, char** env, elf_header64 head
 
 	*envstart = NULL;
 
-	if(interp)
-		argc++;
-	
 	*argcptr = argc;
 
 	

src/sys/sched/scheduler.c

@@ -72,12 +72,8 @@ static thread_t* allocthread(proc_t* proc, state_t state, pid_t tid, size_t ksta
 		return NULL;
 	}
 
-
-	// XXX use alloc() when it's better
 	
-	size_t pagec = kstacksize / PAGE_SIZE + 1;
+	thread->kernelstackbase = alloc(kstacksize);
-	
-	thread->kernelstackbase = pmm_hhdmalloc(pagec);
 
 
 	if(!thread->kernelstackbase){
@@ -98,8 +94,7 @@ static thread_t* allocthread(proc_t* proc, state_t state, pid_t tid, size_t ksta
 
 static thread_t* freethread(thread_t* thread){
 	free(thread->regs);
-	// XXX use free() when it's better
+	free(thread->kernelstack);
-	pmm_free(thread->kernelstackbase, thread->stacksize / PAGE_SIZE + 1);
 	free(thread);
 }
 
@@ -330,7 +325,7 @@ void sched_runinit(){
 		_panic("Could not load init", 0);
 	}
 
-	char* argv[] = {"/sbin/init", NULL};
+	char* argv[] = {"/usr/bin/bash", NULL};
 	char* env[]  = {NULL};
 
 	ret = elf_load(thread, node, argv, env);

src/sys/syscalls/close.c

@@ -5,7 +5,6 @@
 #include <arch/spinlock.h>
 
 syscallret syscall_close(int ifd){
-
         syscallret retv;
         retv.ret = -1;
 

src/sys/syscalls/open.c

@@ -69,7 +69,7 @@ syscallret syscall_open(const char* pathname, int flags, mode_t mode){
 	fd->flags = flags + 1; // 1 is added to make O_RDONLY etc easier to lookup
 	fd->offset = 0;
 	
-	vnode_t* file;
+	vnode_t* file = NULL;
 
 	size_t ret = vfs_open(&file, 
 		*name == '/' ? proc->root : proc->cwd,

src/sys/syscalls/read.c

@@ -57,6 +57,8 @@ syscallret syscall_read(int ifd, void* buff, size_t count){
 
 	retv.errno = 0;
 	retv.ret = readc;
+
+	free(kbuff);
 	
 	return retv;
 }

src/sys/syscalls/stat.c

@@ -0,0 +1,51 @@
+#include <kernel/syscalls.h>
+#include <sys/stat.h>
+#include <kernel/vmm.h>
+#include <errno.h>
+#include <kernel/vfs.h>
+#include <kernel/sched.h>
+#include <arch/cls.h>
+#include <kernel/alloc.h>
+#include <string.h>
+
+syscallret syscall_stat(const char* path, stat* st){
+	
+	syscallret retv;
+	retv.ret = -1;
+
+	if(st > USER_SPACE_END){
+		retv.errno = EFAULT;
+		return retv;
+	}
+
+	char* kpath = alloc(strlen(path)); // XXX use proper user strlen func
+	
+	if(!path){
+		retv.errno = ENOMEM;
+		return retv;
+	}
+
+	strcpy(kpath, path); // XXX use user strcpy func
+
+	vnode_t* file;
+	
+	proc_t* proc = arch_getcls()->thread->proc;
+
+	int ret = vfs_open(&file, *kpath == '/' ? proc->root : proc->cwd, kpath);
+
+	if(ret){
+		retv.errno = ret;
+		goto _ret;
+	}
+
+	stat stbuff = file->st;
+
+	vfs_close(file);
+
+	memcpy(st, &stbuff, sizeof(stat)); // XXX use user memcpy
+
+	_ret:
+	free(kpath);
+	return retv;
+
+}