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/**********************************************************************
wait.c
Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
terms and conditions.
**********************************************************************/
#include <errno.h>
#include <signal.h>
#include <sys/wait.h>
#include "ptproxy.h"
#include "sysdep.h"
#include "wait.h"
#include "user_util.h"
#include "ptrace_user.h"
#include "sysdep/ptrace.h"
#include "sysdep/sigcontext.h"
int proxy_wait_return(struct debugger *debugger, pid_t unused)
{
debugger->waiting = 0;
if(debugger->debugee->died || (debugger->wait_options & __WCLONE)){
debugger_cancelled_return(debugger, -ECHILD);
return(0);
}
if(debugger->debugee->zombie && debugger->debugee->event)
debugger->debugee->died = 1;
if(debugger->debugee->event){
debugger->debugee->event = 0;
ptrace(PTRACE_POKEDATA, debugger->pid,
debugger->wait_status_ptr,
debugger->debugee->wait_status);
/* if (wait4)
ptrace (PTRACE_POKEDATA, pid, rusage_ptr, ...); */
debugger_cancelled_return(debugger, debugger->debugee->pid);
return(0);
}
/* pause will return -EINTR, which happens to be right for wait */
debugger_normal_return(debugger, -1);
return(0);
}
int parent_wait_return(struct debugger *debugger, pid_t unused)
{
return(debugger_normal_return(debugger, -1));
}
int real_wait_return(struct debugger *debugger)
{
unsigned long ip;
int pid;
pid = debugger->pid;
ip = ptrace(PTRACE_PEEKUSR, pid, PT_IP_OFFSET, 0);
IP_RESTART_SYSCALL(ip);
if(ptrace(PTRACE_POKEUSR, pid, PT_IP_OFFSET, ip) < 0)
tracer_panic("real_wait_return : Failed to restart system "
"call, errno = %d\n", errno);
if((ptrace(PTRACE_SYSCALL, debugger->pid, 0, SIGCHLD) < 0) ||
(ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) ||
(ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) ||
debugger_normal_return(debugger, -1))
tracer_panic("real_wait_return : gdb failed to wait, "
"errno = %d\n", errno);
return(0);
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/
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