From 1acde03a7c0f85aca9919e374e3df6cee6f0bd08 Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Thu, 20 Nov 2014 04:51:23 +0100
Subject: workin on syscall interface etc..

---
 kernel/syscalls.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 107 insertions(+), 1 deletion(-)

(limited to 'kernel/syscalls.c')

diff --git a/kernel/syscalls.c b/kernel/syscalls.c
index b5a581d..1de5d3a 100644
--- a/kernel/syscalls.c
+++ b/kernel/syscalls.c
@@ -5,11 +5,20 @@
 #include "fs/fs.h"
 #include "fs/ext2.h"
 #include "kernel/console.h"
+#include "kernel/config.h"
+#include <sys/stat.h>
 
 
-//
+static int preread;
+static int alloc=0x600000; // TODO: implement properly sbrk!!!
+
 int syscall_write(int file, char *buf, int len)
 {
+
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"write(file=%d, buf=0x%08X, len=%d)", file,buf,len);
+    #endif
+
     // ALL output to stdout
     for(int i=0;i<len;i++)
     {
@@ -22,6 +31,10 @@ int syscall_write(int file, char *buf, int len)
 int syscall_read(int file, char *buf, int len)
 {
 
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"read(file=%d, buf=0x%08X, len=%d)", file,buf,len);
+    #endif
+
     // stdin
     if(file==1)
     {
@@ -48,14 +61,107 @@ int syscall_read(int file, char *buf, int len)
 
 int syscall_readdir(const char *name,fs_dirent *dirs,int max)
 {
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"readdir(name=0x%08X, dirs=0x%08X,  %d)", name,dirs,max);
+    #endif
+
     return fs_readdir(name,dirs,max);
 }
 
 int syscall_execve(char *name, char **argv, char **env)
 {
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"execve (name=0x%08X, argvs=0x%08X,  env=0x%08X)", name,argv,env);
+    #endif
+
     ext2_inode_content(EXT2_RAM_ADDRESS,name,0x800000,0x100000);
 
     // autorun "user-space" prog
     asm("push $0x800000");
     asm("ret");
 }
+
+int syscall_open(char *name, int flags, int len)
+{
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"open (name=0x%08X, flags=%d,  len=%d)", name,flags,len);
+    #endif
+
+    return 1;
+
+}
+
+//newcomers
+//
+int syscall_close(int file,int none1,int none2)  
+{
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"close (file=%d)", file);
+    #endif
+
+    return -1;
+}
+
+int syscall_fstat(int file, struct stat *st,int none)
+{
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"fstat (file=%d,stat=0x%08X)", file,st);
+    #endif
+
+    st->st_mode = S_IFCHR;
+    return 0;
+}
+
+int syscall_isatty(int file,int none1,int none2)  
+{
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"isatty (file=%d)", file);
+    #endif
+
+    return 1;
+}
+
+int syscall_lseek(int file,int ptr,int dir) 
+{
+
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"lseek (file=%d, ptr=%d, dir=%d)", file,ptr,dir);
+    #endif
+
+    if(dir==0)preread=ptr;
+    else{ while(1);}
+    return preread;
+}
+
+caddr_t syscall_sbrk(int incr, int none1, int none2) 
+{
+    #ifdef LOG_SYSCALLS
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"sbrk (incr=%d)", incr);
+    #endif
+
+    int oldalloc=alloc;
+    alloc+=incr;
+    return oldalloc;
+
+	    /*
+	    
+            extern char end;	    
+//	    char _end;
+            static char *heap_end;
+            char *prev_heap_end;
+          
+            if (heap_end == 0) {
+              heap_end = &end;
+            }
+            prev_heap_end = heap_end;
+
+            if (heap_end + incr > stack_ptr) {
+              write (1, "Heap and stack collision\n", 25);
+              abort ();
+            }
+          
+            heap_end += incr;
+            return (caddr_t) prev_heap_end;
+	    */
+}
+
-- 
cgit v1.2.3