From b74c5c8fb4de3b2847bc942e57dcf8f0dea705be Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Wed, 13 May 2015 23:58:39 +0200
Subject: fixed libc and 'userspace'

---
 kernel/syscalls.c | 49 ++++++++++++++++++++-----------------------------
 1 file changed, 20 insertions(+), 29 deletions(-)

(limited to 'kernel/syscalls.c')

diff --git a/kernel/syscalls.c b/kernel/syscalls.c
index 6d46f1a..38f7161 100644
--- a/kernel/syscalls.c
+++ b/kernel/syscalls.c
@@ -14,7 +14,7 @@
 int syscall_unhandled(int nr)
 {
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"syscall: %d", nr);
-    panic(FOOLOS_MODULE_NAME,"unhandled syscall");
+    panic(FOOLOS_MODULE_NAME,"unhandled syscall (generic handler)");
 }
 
 int syscall_lseek(int file,int ptr,int dir) 
@@ -23,7 +23,7 @@ int syscall_lseek(int file,int ptr,int dir)
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"lseek (file=%d, ptr=%d, dir=%d)", file,ptr,dir);
     #endif
 
-    panic(FOOLOS_MODULE_NAME,"unhandled syscall");
+    panic(FOOLOS_MODULE_NAME,"unhandled syscall: lseek");
 
     return 0;
 
@@ -39,7 +39,7 @@ int syscall_write(int file, char *buf, int len)
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"[%d] write(file=%d, buf=0x%08X, len=%d)", task_get_current_pid(),file,buf,len);
     #endif
 
-    if(file!=1&&file!=2) panic(FOOLOS_MODULE_NAME,"unhandled syscall");
+    if(file!=1&&file!=2) panic(FOOLOS_MODULE_NAME,"unhandled syscall: write (only stdout and stderr)");
 
     //stderr and stdout go to console
     for(int i=0;i<len;i++)
@@ -59,8 +59,9 @@ int syscall_read(int file, char *buf, int len)
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"read(file=%d, buf=0x%08X, len=%d)", file,buf,len);
     #endif
 
+
     // stdin TODO: other descroptiors!
-    if(file!=0) panic(FOOLOS_MODULE_NAME,"unhandled syscall");
+    if(file!=0) panic(FOOLOS_MODULE_NAME,"unhandled syscall: read (only stdin)");
     {
 	if(eof)
 	{
@@ -149,28 +150,18 @@ int copy_args(char **in, char **out)
     return count;
 }
 
-
-int *entry_global=1;
-char **argv_global=10;
-char **env_global=300;
-char **argv=0x8000000;
-char **env=0x8000000+300;
-
-
 int syscall_execve(char *name, char **argv1, char **env1)
 {
     #ifdef LOG_SYSCALLS
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"execve (name=0x%08X(%s), argvs=0x%08X,  env=0x%08X)", name,name,argv1,env1);
     #endif
 
-     copy_args(argv1,argv_global);
-     copy_args(env1,env_global);
-
     uint32_t alloc;
-    *entry_global=load_elf(name,&alloc);
+    uint32_t entry_global=load_elf(name,&alloc);
+
     task_set_brk(alloc);
 
-    if(!*entry_global)
+    if(!entry_global)
     {
 	#ifdef LOG_SYSCALLS
 	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"execve: bailing out!");
@@ -181,18 +172,14 @@ int syscall_execve(char *name, char **argv1, char **env1)
     /* try to move this to asm */
     //asm volatile("jmp .");
     asm volatile("mov $0x8fff000,%esp"); // set stack at high end of process image
+    int arg_count=0;
 
-    int arg_count=copy_args(argv_global,argv);
-    copy_args(env_global,env);
-
-    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"argc: %d" ,arg_count);
-
-    asm volatile ("push %0" :: "r" (argv));
+    asm volatile ("push %0" :: "r" (argv1));
     asm volatile ("push %0" :: "r" (arg_count));
-    asm volatile ("push %0" :: "r" (env));
+    asm volatile ("push %0" :: "r" (env1));
 
     // push addr and return to it
-    asm volatile ("push %0"::"r"(*entry_global));
+    asm volatile ("pushl %0"::"r"(entry_global));
     
     asm volatile ("sti");
     asm volatile ("ret");
@@ -206,7 +193,7 @@ int syscall_open(char *name, int flags, int mode)
     #ifdef LOG_SYSCALLS
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"open (name=0x%08X(\"%s\"), flags=%d,  mode=%d)",name, name,flags,mode);
     #endif
-    panic(FOOLOS_MODULE_NAME,"unhandled syscall");
+    panic(FOOLOS_MODULE_NAME,"unhandled syscall: open");
 
 }
 
@@ -220,7 +207,7 @@ int syscall_close(int file,int none1,int none2)
     #endif
 
     if(file!=0&&file!=1&&file!=2)
-        panic(FOOLOS_MODULE_NAME,"unhandled syscall");
+        panic(FOOLOS_MODULE_NAME,"unhandled syscall: close");
 
     return -1;
 }
@@ -234,18 +221,22 @@ int syscall_isatty(int file,int none1,int none2)
 
     return 1;
 }
+uint32_t fuckalloc=0x8500000;
 
 // TODO: per process basis!
 uint32_t syscall_sbrk(int incr, int none1, int none2) 
 {
     uint32_t alloc=task_get_brk();
-    uint32_t oldalloc=alloc;
-    alloc+=incr;
+
+    uint32_t oldalloc=fuckalloc;
+    fuckalloc+=incr;
+
     task_set_brk(alloc);
 
     #ifdef LOG_SYSCALLS
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"sbrk (incr=%d) = 0x%08X", incr,oldalloc);
     #endif
+
     return oldalloc;
 }
 
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