temporary undoing of renaming

1 files changed, 124 insertions, 0 deletions

diff --git a/pk/syscall.c b/pk/syscall.c
new file mode 100644
index 0000000..85c853b
--- /dev/null
+++ b/pk/syscall.c
@@ -0,0 +1,124 @@
+#include <machine/syscall.h>
+#include <string.h>
+#include <errno.h>
+#include "pk.h"
+#include "pcr.h"
+#include "file.h"
+#include "frontend.h"
+
+typedef sysret_t (*syscall_t)(long,long,long,long,long);
+
+void sys_exit(int code)
+{
+  frontend_syscall(SYS_exit,code,0,0,0);
+  panic("exit didn't exit!");
+}
+
+sysret_t sys_read(int fd, char* buf, size_t n)
+{
+  sysret_t r = {-1,EBADF};
+  file_t* f = file_get(fd);
+  if(!f)
+    return r;
+
+  return file_read(f,buf,n);
+}
+
+sysret_t sys_write(int fd, const char* buf, size_t n)
+{
+  sysret_t r = {-1,EBADF};
+  file_t* f = file_get(fd);
+  if(!f)
+    return r;
+
+  return file_write(f,buf,n);
+}
+
+sysret_t sys_open(const char* name, size_t len, int flags, int mode)
+{
+  sysret_t ret = file_open(name, len, flags, mode);
+  if(ret.result == -1)
+    return ret;
+
+  if((ret.result = file_dup((file_t*)ret.result)) == -1)
+    ret.err = ENOMEM;
+
+  return ret;
+}
+
+sysret_t sys_close(int fd)
+{
+  return (sysret_t){fd_close(fd),EBADF};
+}
+
+sysret_t sys_fstat(int fd, void* st)
+{
+  sysret_t r = {-1,EBADF};
+  file_t* f = file_get(fd);
+  if(!f)
+    return r;
+
+  return file_stat(f,st);
+}
+
+sysret_t sys_lseek(int fd, size_t ptr, int dir)
+{
+  sysret_t r = {-1,EBADF};
+  file_t* f = file_get(fd);
+  if(!f)
+    return r;
+
+  return file_lseek(f,ptr,dir);
+}
+
+sysret_t sys_stat(const char* name, size_t len, void* st)
+{
+  return frontend_syscall(SYS_stat,(long)name,len,(long)st,0);
+}
+
+sysret_t sys_lstat(const char* name, size_t len, void* st)
+{
+  return frontend_syscall(SYS_lstat,(long)name,len,(long)st,0);
+}
+
+sysret_t sys_link(const char* old_name, size_t old_len,
+                  const char* new_name, size_t new_len)
+{
+  return frontend_syscall(SYS_link,(long)old_name,old_len,
+                                   (long)new_name,new_len);
+}
+
+sysret_t sys_unlink(const char* name, size_t len)
+{
+  return frontend_syscall(SYS_unlink,(long)name,len,0,0);
+}
+
+sysret_t sys_brk(size_t pos)
+{
+  if(pos > (mfpcr(PCR_MEMSIZE) << MEMSIZE_SHIFT))
+    return (sysret_t){-1, ENOMEM};
+  return (sysret_t){0,0};
+}
+
+sysret_t syscall(long a0, long a1, long a2, long a3, long n)
+{
+  const static void* syscall_table[] = {
+    [SYS_exit] = sys_exit,
+    [SYS_read] = sys_read,
+    [SYS_write] = sys_write,
+    [SYS_open] = sys_open,
+    [SYS_close] = sys_close,
+    [SYS_fstat] = sys_fstat,
+    [SYS_lseek] = sys_lseek,
+    [SYS_stat] = sys_stat,
+    [SYS_lstat] = sys_lstat,
+    [SYS_link] = sys_link,
+    [SYS_unlink] = sys_unlink,
+    [SYS_brk] = sys_brk,
+  };
+
+  if(n >= ARRAY_SIZE(syscall_table) || !syscall_table[n])
+    panic("bad syscall #%ld!",n);
+
+  return ((syscall_t)syscall_table[n])(a0, a1, a2, a3, n);
+}