void __wrap_free(void *addr) {
if (EarlyMallocEnabled) {
early_free(addr);
}
enter_kernel();
__real_free(addr);
leave_kernel();
}
void *__wrap_malloc(size_t size) {
if (EarlyMallocEnabled) {
return early_malloc(size);
}
enter_kernel();
void *mem = __real_malloc(size);
leave_kernel();
return mem;
}
asmlinkage void
csyscall(struct pt_regs* regs)
{
unsigned long num = regs->gregs[13];
extern void stack_trace(void);
extern void leave_kernel(struct pt_regs* regs);
CHECK_STACK();
#if 0
if (user_mode(regs)) {
printk("syscall %d; pc == 0x%8x\n", num, get_pc());
stack_trace();
}
#endif
if (num >= 0 && num < __NR_nocall) {
switch(num) {
/*
* system calls that need the regs
*/
case __NR_fork:
case __NR_clone:
case __NR_execve:
case __NR_sigsuspend:
regs->gregs[0] = ((int (*)(int))(syscall_tab[num]))((int)regs);
break;
#ifdef DEBUG /* help debug user applications */
case __NR_dbg_break:
printk("break: %s\n", regs->gregs[0]);
system_break();
break;
case __NR_dbg_hexprint:
printk("value: %x\n", regs->gregs[0]);
break;
#endif
case __NR_mmap:
regs->gregs[0] = sys_mmap(regs);
#if 0
dprintk("mmap: returning 0x%8x\n",
regs->gregs[0]);
#endif
break;
default:
regs->gregs[0] =
syscall_tab[num](regs->gregs[0],
regs->gregs[1],
regs->gregs[2],
regs->gregs[3],
regs->gregs[4]);
break;
}
} else {
regs->gregs[0] = -ENOSYS;
}
#if 0
printk("csyscall: returning %p\n", regs->gregs[0]);
stack_trace();
#endif
leave_kernel(regs);
}
