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#include <sys/stat.h>
#include <string.h>
#include <stdint.h>
#include "../kernel/syscalls.h"
/*
char *__env1[]={0};
char *__env2[]={"dupa","test"};
char **environ={__env1,__env2};
*/
void _exit(int ret)
{
while(1);
}
// generic syscall interface!
int syscall(int call, int p1, int p2, int p3)
{
int ebx; // will hold return value;
asm("pusha");
// select syscall
asm("mov %0, %%eax"::"m"(call));
// pass params
asm("mov %0,%%edx"::"m"(p1));
asm("mov %0,%%ecx"::"m"(p2));
asm("mov %0,%%ebx"::"m"(p3));
// interrrupt
asm("int $0x80");
// get return value
asm("mov %%ebx, %0": "=b" (ebx));
asm("popa");
return ebx;
}
int close(int file)
{
return syscall(SYSCALL_CLOSE,file,0,0);
}
int fstat(int file, struct stat *st)
{
return syscall(SYSCALL_FSTAT,file,st,0);
}
int isatty(int file)
{
return syscall(SYSCALL_ISATTY,file,0,0);
}
int lseek(int file, int ptr, int dir)
{
return syscall(SYSCALL_LSEEK,file,ptr,dir);
}
int read(int file, char *ptr, int len)
{
return syscall(SYSCALL_READ,file,ptr,len);
}
int readdir(const char *name,fs_dirent *dirs,int max)
{
return syscall(SYSCALL_READDIR,name,dirs,max);
}
int open(const char *name, int flags, int mode)
{
return syscall(SYSCALL_OPEN,name,flags,mode);
}
int write(int file, char *ptr, int len)
{
return syscall(SYSCALL_WRITE,file,ptr,len);
}
int execve(char *name, char **argv, char **env)
{
return syscall(SYSCALL_EXECVE,name,argv,env);
}
caddr_t sbrk(int incr)
{
static int alloc=0x300000; // TODO: implement properly sbrk!!!
int oldalloc=alloc;
alloc+=incr;
return oldalloc;
return syscall(SYSCALL_SBRK,incr,0,0);
}
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