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/config.h   |   1 +
 kernel/kernel.c   |   2 +-
 kernel/syscalls.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 kernel/syscalls.h |  21 +++++++++++
 4 files changed, 130 insertions(+), 2 deletions(-)

(limited to 'kernel')

diff --git a/kernel/config.h b/kernel/config.h
index 039ced7..ef0fa71 100644
--- a/kernel/config.h
+++ b/kernel/config.h
@@ -10,4 +10,5 @@
 #define FOOLOS_CONSOLE		     // otherwise VESA will be used!	
 #define MEM_PRINT_MEMORYMAP
 #define LOG_BUF_SIZE 4069
+#define LOG_SYSCALLS
 
diff --git a/kernel/kernel.c b/kernel/kernel.c
index 2f7cfc3..6058480 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -108,7 +108,7 @@ void kernel_main(uint32_t initial_stack, int mp)
     //
     // Activate Virtual Memory (paging)
     //
-    vmem_init();
+   // vmem_init();
 
 
     //
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;
+	    */
+}
+
diff --git a/kernel/syscalls.h b/kernel/syscalls.h
index 6569aa6..63aafc4 100644
--- a/kernel/syscalls.h
+++ b/kernel/syscalls.h
@@ -1,6 +1,27 @@
 #include "fs/fs.h"
 
+#define SYSCALL_WRITE 61
+#define SYSCALL_READ 62
+#define SYSCALL_READDIR 63
+#define SYSCALL_EXECVE 64
+#define SYSCALL_OPEN 65
+#define SYSCALL_CLOSE 66
+#define SYSCALL_FSTAT 67
+#define SYSCALL_ISATTY 68
+#define SYSCALL_LSEEK 69
+#define SYSCALL_SBRK 70
+
+
+int syscall_open(char *name, int flags, int len);
 int syscall_write(int file, char *buf, int len);
 int syscall_read(int file, char *buf, int len);
 int syscall_readdir(const char *name,fs_dirent *dirs,int max);
 int syscall_execve(char *name, char **argv, char **env);
+
+int syscall_close(int file,int none1,int none2);
+int syscall_fstat(int file, struct stat *st,int none);
+int syscall_isatty(int file,int none1,int none2);  
+int syscall_lseek(int file,int ptr,int dir); 
+int syscall_sbrk(int incr, int none1, int none2);
+
+// missing: _exit, environ, fork, getpid, kill, link, stat, times, unlink, wait;
-- 
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