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-rw-r--r--arch/um/sys-i386/bugs.c76
1 files changed, 0 insertions, 76 deletions
diff --git a/arch/um/sys-i386/bugs.c b/arch/um/sys-i386/bugs.c
deleted file mode 100644
index 2c6d0d731c12..000000000000
--- a/arch/um/sys-i386/bugs.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <signal.h>
-#include "kern_constants.h"
-#include "kern_util.h"
-#include "longjmp.h"
-#include "task.h"
-#include "user.h"
-#include "sysdep/ptrace.h"
-
-/* Set during early boot */
-static int host_has_cmov = 1;
-static jmp_buf cmov_test_return;
-
-static void cmov_sigill_test_handler(int sig)
-{
- host_has_cmov = 0;
- longjmp(cmov_test_return, 1);
-}
-
-void arch_check_bugs(void)
-{
- struct sigaction old, new;
-
- printk(UM_KERN_INFO "Checking for host processor cmov support...");
- new.sa_handler = cmov_sigill_test_handler;
-
- /* Make sure that SIGILL is enabled after the handler longjmps back */
- new.sa_flags = SA_NODEFER;
- sigemptyset(&new.sa_mask);
- sigaction(SIGILL, &new, &old);
-
- if (setjmp(cmov_test_return) == 0) {
- unsigned long foo = 0;
- __asm__ __volatile__("cmovz %0, %1" : "=r" (foo) : "0" (foo));
- printk(UM_KERN_CONT "Yes\n");
- } else
- printk(UM_KERN_CONT "No\n");
-
- sigaction(SIGILL, &old, &new);
-}
-
-void arch_examine_signal(int sig, struct uml_pt_regs *regs)
-{
- unsigned char tmp[2];
-
- /*
- * This is testing for a cmov (0x0f 0x4x) instruction causing a
- * SIGILL in init.
- */
- if ((sig != SIGILL) || (TASK_PID(get_current()) != 1))
- return;
-
- if (copy_from_user_proc(tmp, (void *) UPT_IP(regs), 2)) {
- printk(UM_KERN_ERR "SIGILL in init, could not read "
- "instructions!\n");
- return;
- }
-
- if ((tmp[0] != 0x0f) || ((tmp[1] & 0xf0) != 0x40))
- return;
-
- if (host_has_cmov == 0)
- printk(UM_KERN_ERR "SIGILL caused by cmov, which this "
- "processor doesn't implement. Boot a filesystem "
- "compiled for older processors");
- else if (host_has_cmov == 1)
- printk(UM_KERN_ERR "SIGILL caused by cmov, which this "
- "processor claims to implement");
- else
- printk(UM_KERN_ERR "Bad value for host_has_cmov (%d)",
- host_has_cmov);
-}