#include <stdlib.h>
#include <setjmp.h>
#include <sys/time.h>
-#include <sys/ptrace.h>
-
-/*Userspace header, must be after sys/ptrace.h, and both must be included. */
-#include <linux/ptrace.h>
-
#include <sys/wait.h>
#include <sys/mman.h>
#include <asm/unistd.h>
#include "signal_kern.h"
#include "signal_user.h"
#include "sysdep/ptrace.h"
-#include "sysdep/ptrace_user.h"
#include "sysdep/sigcontext.h"
#include "irq_user.h"
#include "ptrace_user.h"
SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- set_handler(SIGWINCH, (__sighandler_t) sig_handler, flags,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
set_handler(SIGUSR2, (__sighandler_t) sig_handler,
flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
signal(SIGHUP, SIG_IGN);
return(arg.pid);
}
-static int ptrace_child(void *arg)
+static int ptrace_child(void)
{
int ret;
int pid = os_getpid(), ppid = getppid();
_exit(ret);
}
-static int start_ptraced_child(void **stack_out)
+static int start_ptraced_child(void)
{
- void *stack;
- unsigned long sp;
int pid, n, status;
- stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if(stack == MAP_FAILED)
- panic("check_ptrace : mmap failed, errno = %d", errno);
- sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);
- pid = clone(ptrace_child, (void *) sp, SIGCHLD, NULL);
+ pid = fork();
+ if(pid == 0)
+ ptrace_child();
+
if(pid < 0)
- panic("check_ptrace : clone failed, errno = %d", errno);
+ panic("check_ptrace : fork failed, errno = %d", errno);
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
if(n < 0)
panic("check_ptrace : wait failed, errno = %d", errno);
panic("check_ptrace : expected SIGSTOP, got status = %d",
status);
- *stack_out = stack;
return(pid);
}
* just avoid using sysemu, not panic, but only if SYSEMU features are broken.
* So only for SYSEMU features we test mustpanic, while normal host features
* must work anyway!*/
-static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
+static int stop_ptraced_child(int pid, int exitcode, int mustexit)
{
int status, n, ret = 0;
if(ptrace(PTRACE_CONT, pid, 0, 0) < 0)
- panic("check_ptrace : ptrace failed, errno = %d", errno);
+ panic("stop_ptraced_child : ptrace failed, errno = %d", errno);
CATCH_EINTR(n = waitpid(pid, &status, 0));
if(!WIFEXITED(status) || (WEXITSTATUS(status) != exitcode)) {
int exit_with = WEXITSTATUS(status);
printk("check_ptrace : child exited with exitcode %d, while "
"expecting %d; status 0x%x", exit_with,
exitcode, status);
- if (mustpanic)
+ if (mustexit)
panic("\n");
else
printk("\n");
ret = -1;
}
- if(munmap(stack, PAGE_SIZE) < 0)
- panic("check_ptrace : munmap failed, errno = %d", errno);
return ret;
}
static void __init check_sysemu(void)
{
- void *stack;
int pid, syscall, n, status, count=0;
printk("Checking syscall emulation patch for ptrace...");
sysemu_supported = 0;
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
if(ptrace(PTRACE_SYSEMU, pid, 0, 0) < 0)
goto fail;
panic("check_sysemu : expected SIGTRAP, "
"got status = %d", status);
- n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_RET_OFFSET,
+ n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET,
os_getpid());
if(n < 0)
panic("check_sysemu : failed to modify system "
"call return, errno = %d", errno);
- if (stop_ptraced_child(pid, stack, 0, 0) < 0)
+ if (stop_ptraced_child(pid, 0, 0) < 0)
goto fail_stopped;
sysemu_supported = 1;
set_using_sysemu(!force_sysemu_disabled);
printk("Checking advanced syscall emulation patch for ptrace...");
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
while(1){
count++;
if(ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0)
panic("check_ptrace : expected (SIGTRAP|SYSCALL_TRAP), "
"got status = %d", status);
- syscall = ptrace(PTRACE_PEEKUSER, pid, PT_SYSCALL_NR_OFFSET,
+ syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET,
0);
if(syscall == __NR_getpid){
if (!count)
panic("check_ptrace : SYSEMU_SINGLESTEP doesn't singlestep");
- n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_RET_OFFSET,
+ n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET,
os_getpid());
if(n < 0)
panic("check_sysemu : failed to modify system "
break;
}
}
- if (stop_ptraced_child(pid, stack, 0, 0) < 0)
+ if (stop_ptraced_child(pid, 0, 0) < 0)
goto fail_stopped;
sysemu_supported = 2;
return;
fail:
- stop_ptraced_child(pid, stack, 1, 0);
+ stop_ptraced_child(pid, 1, 0);
fail_stopped:
printk("missing\n");
}
void __init check_ptrace(void)
{
- void *stack;
int pid, syscall, n, status;
printk("Checking that ptrace can change system call numbers...");
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
panic("check_ptrace: PTRACE_SETOPTIONS failed, errno = %d", errno);
panic("check_ptrace : expected SIGTRAP + 0x80, "
"got status = %d", status);
- syscall = ptrace(PTRACE_PEEKUSER, pid, PT_SYSCALL_NR_OFFSET,
+ syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET,
0);
if(syscall == __NR_getpid){
- n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,
+ n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
__NR_getppid);
if(n < 0)
panic("check_ptrace : failed to modify system "
break;
}
}
- stop_ptraced_child(pid, stack, 0, 1);
+ stop_ptraced_child(pid, 0, 1);
printk("OK\n");
check_sysemu();
}
static inline int check_skas3_ptrace_support(void)
{
struct ptrace_faultinfo fi;
- void *stack;
int pid, n, ret = 1;
printf("Checking for the skas3 patch in the host...");
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi);
if (n < 0) {
}
init_registers(pid);
- stop_ptraced_child(pid, stack, 1, 1);
+ stop_ptraced_child(pid, 1, 1);
return(ret);
}
git://git.onelab.eu / linux-2.6.git / blobdiff