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#define FOOLOS_MODULE_NAME "syscalls"
#include "lib/buffer/ringbuffer.h"
#include "lib/logger/log.h"
#include "fs/fs.h"
#include "fs/ext2.h"
#include "kernel/console.h"
#include "kernel/config.h"
#include <sys/stat.h>
#include <stdbool.h>
#include <stddef.h>
int syscall_unhandled(int nr)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"syscall: %d", nr);
panic(FOOLOS_MODULE_NAME,"unhandled syscall (generic handler)");
}
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
panic(FOOLOS_MODULE_NAME,"unhandled syscall: lseek");
return 0;
}
// TODO: /dev/console or /dev/tty1 - /dev/ttyN
int syscall_write(int file, char *buf, int len)
{
lock_spin(2);
//x86_int_disable();
#ifdef LOG_SYSCALLS
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: write (only stdout and stderr)");
//stderr and stdout go to console
for(int i=0;i<len;i++)
{
console_put_char_green(buf[i]);
}
lock_release(2);
//x86_int_enable();
return len;
}
// TODO: /dev/kb
int syscall_read(int file, char *buf, int len)
{
static bool eof=false;
#ifdef LOG_SYSCALLS
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: read (only stdin)");
{
if(eof)
{
eof=false;
return 0;
}
char c;
int l=0;
while(1)
{
bool ret=ringbuffer_get(&c);
if(ret)
{
if(c==0x08)
{
if(l>0)
{
console_del_char();
buf--;
l--;
}
}
else{
*buf=c;
buf++;
l++;
if(c!=0x04)console_put_char_white(c);
if(c=='\n')return l;
if(c==0x04)
{
l--;
buf--;
eof=true;
return l;
}
}
}
}
}
}
//TODO: replace with dirent!
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 copy_args(char **in, char **out)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"copy_args(0x%08x, 0x%08X)",in,out);
int count=0;
while(in[count]!=NULL)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"args(0x%08x: %s)",in[count],out);
count++;
};
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"copy_args : count: %d",count);
char **pos=out;
pos+=sizeof(char **)*(count+1);
int i=0;
do{
int l=strlen(in[i]);
char *var=pos;
memcpy(var,in[i],l+1);
pos+=sizeof(char *)*(l+1);
out[i]=var;
i++;
}while(in[i]!=NULL);
out[i]=NULL;
return count;
}
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
uint32_t alloc;
uint32_t entry_global=load_elf(name,&alloc);
task_set_brk(alloc);
if(!entry_global)
{
#ifdef LOG_SYSCALLS
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"execve: bailing out!");
#endif
return -1; // errror loading
}
/* 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;
asm volatile ("push %0" :: "r" (argv1));
asm volatile ("push %0" :: "r" (arg_count));
asm volatile ("push %0" :: "r" (env1));
// push addr and return to it
asm volatile ("pushl %0"::"r"(entry_global));
asm volatile ("sti");
asm volatile ("ret");
// this is never reached!
}
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: open");
}
//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
if(file!=0&&file!=1&&file!=2)
panic(FOOLOS_MODULE_NAME,"unhandled syscall: close");
return -1;
}
// TODO: check if file is termminal!
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;
}
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=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;
}
// stat, fstat, lstat
int syscall_stat(const char *path, struct stat *st,int none)
{
#ifdef LOG_SYSCALLS
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"stat (path=0x%08X,stat=0x%08X)", path,st);
#endif
st->st_mode = S_IFCHR;
return 0;
}
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_lstat(const char *path, struct stat *st,int none)
{
#ifdef LOG_SYSCALLS
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"lstat (path=0x%08X,stat=0x%08X)", path,st);
#endif
st->st_mode = S_IFCHR;
return 0;
}
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