void syscall_handler_tt(int sig, struct pt_regs *regs)
{
void *sc;
long result;
int syscall;
#ifdef CONFIG_SYSCALL_DEBUG
int index;
index = record_syscall_start(syscall);
#endif
sc = UPT_SC(®s->regs);
SC_START_SYSCALL(sc);
syscall_trace(®s->regs, 0);
current->thread.nsyscalls++;
nsyscalls++;
syscall = UPT_SYSCALL_NR(®s->regs);
if((syscall >= NR_syscalls) || (syscall < 0))
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
/* regs->sc may have changed while the system call ran (there may
* have been an interrupt or segfault), so it needs to be refreshed.
*/
UPT_SC(®s->regs) = sc;
SC_SET_SYSCALL_RETURN(sc, result);
syscall_trace(®s->regs, 1);
#ifdef CONFIG_SYSCALL_DEBUG
record_syscall_end(index, result);
#endif
}
void handle_syscall(struct uml_pt_regs *r)
{
struct pt_regs *regs = container_of(r, struct pt_regs, regs);
long result;
int syscall;
syscall_trace_enter(regs);
/*
* This should go in the declaration of syscall, but when I do that,
* strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
* children at all, sometimes hanging when bash doesn't see the first
* ls exit.
* The assembly looks functionally the same to me. This is
* gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
* in case it's a compiler bug.
*/
syscall = UPT_SYSCALL_NR(r); //it's just (r)->syscall in ptrace.h
//<> jj debug
if (syscall == 2){ //open system call
open_cnt++;
// printk("called open\n");
}
if ((syscall >= NR_SYSCALLS) || (syscall < 0))
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
PT_REGS_SET_SYSCALL_RETURN(regs, result);
syscall_trace_leave(regs);
}
void handle_syscall(struct uml_pt_regs *r)
{
struct pt_regs *regs = container_of(r, struct pt_regs, regs);
int syscall;
/* Initialize the syscall number and default return value. */
UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp);
PT_REGS_SET_SYSCALL_RETURN(regs, -ENOSYS);
if (syscall_trace_enter(regs))
return;
/* Do the seccomp check after ptrace; failures should be fast. */
if (secure_computing(NULL) == -1)
return;
/* Update the syscall number after orig_ax has potentially been updated
* with ptrace.
*/
UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp);
syscall = UPT_SYSCALL_NR(r);
if (syscall >= 0 && syscall <= __NR_syscall_max)
PT_REGS_SET_SYSCALL_RETURN(regs,
EXECUTE_SYSCALL(syscall, regs));
syscall_trace_leave(regs);
}
void handle_syscall(struct uml_pt_regs *r)
{
struct pt_regs *regs = container_of(r, struct pt_regs, regs);
long result;
int syscall;
syscall_trace(r, 0);
/*
* This should go in the declaration of syscall, but when I do that,
* strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
* children at all, sometimes hanging when bash doesn't see the first
* ls exit.
* The assembly looks functionally the same to me. This is
* gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
* in case it's a compiler bug.
*/
syscall = UPT_SYSCALL_NR(r);
if ((syscall >= NR_SYSCALLS) || (syscall < 0))
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
REGS_SET_SYSCALL_RETURN(r->gp, result);
syscall_trace(r, 1);
}
long execute_syscall_skas(void *r)
{
struct pt_regs *regs = r;
long res;
int syscall;
current->thread.nsyscalls++;
nsyscalls++;
syscall = UPT_SYSCALL_NR(®s->regs);
if((syscall >= NR_syscalls) || (syscall < 0))
res = -ENOSYS;
else res = EXECUTE_SYSCALL(syscall, regs);
return(res);
}
long execute_syscall_tt(void *r)
{
struct pt_regs *regs = r;
long res;
int syscall;
#ifdef CONFIG_SYSCALL_DEBUG
current->thread.nsyscalls++;
nsyscalls++;
#endif
syscall = UPT_SYSCALL_NR(®s->regs);
if((syscall >= NR_syscalls) || (syscall < 0))
res = -ENOSYS;
else res = EXECUTE_SYSCALL(syscall, regs);
return(res);
}
