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Diffstat (limited to 'arch/um/sys-i386/bugs.c')
-rw-r--r--arch/um/sys-i386/bugs.c108
1 files changed, 57 insertions, 51 deletions
diff --git a/arch/um/sys-i386/bugs.c b/arch/um/sys-i386/bugs.c
index 0393e44813e7..806895d73bcc 100644
--- a/arch/um/sys-i386/bugs.c
+++ b/arch/um/sys-i386/bugs.c
@@ -1,18 +1,15 @@
/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include <unistd.h>
#include <errno.h>
+#include <signal.h>
#include <string.h>
-#include <sys/signal.h>
-#include <asm/ldt.h>
-#include "kern_util.h"
-#include "user.h"
-#include "sysdep/ptrace.h"
-#include "task.h"
+#include "kern_constants.h"
#include "os.h"
+#include "task.h"
+#include "user.h"
#define MAXTOKEN 64
@@ -30,18 +27,20 @@ static char token(int fd, char *buf, int len, char stop)
do {
n = os_read_file(fd, ptr, sizeof(*ptr));
c = *ptr++;
- if(n != sizeof(*ptr)){
- if(n == 0)
+ if (n != sizeof(*ptr)) {
+ if (n == 0)
return 0;
- printk("Reading /proc/cpuinfo failed, err = %d\n", -n);
- if(n < 0)
+ printk(UM_KERN_ERR "Reading /proc/cpuinfo failed, "
+ "err = %d\n", -n);
+ if (n < 0)
return n;
else return -EIO;
}
- } while((c != '\n') && (c != stop) && (ptr < end));
+ } while ((c != '\n') && (c != stop) && (ptr < end));
- if(ptr == end){
- printk("Failed to find '%c' in /proc/cpuinfo\n", stop);
+ if (ptr == end) {
+ printk(UM_KERN_ERR "Failed to find '%c' in /proc/cpuinfo\n",
+ stop);
return -1;
}
*(ptr - 1) = '\0';
@@ -54,26 +53,27 @@ static int find_cpuinfo_line(int fd, char *key, char *scratch, int len)
char c;
scratch[len - 1] = '\0';
- while(1){
+ while (1) {
c = token(fd, scratch, len - 1, ':');
- if(c <= 0)
+ if (c <= 0)
return 0;
- else if(c != ':'){
- printk("Failed to find ':' in /proc/cpuinfo\n");
+ else if (c != ':') {
+ printk(UM_KERN_ERR "Failed to find ':' in "
+ "/proc/cpuinfo\n");
return 0;
}
- if(!strncmp(scratch, key, strlen(key)))
+ if (!strncmp(scratch, key, strlen(key)))
return 1;
do {
n = os_read_file(fd, &c, sizeof(c));
- if(n != sizeof(c)){
- printk("Failed to find newline in "
+ if (n != sizeof(c)) {
+ printk(UM_KERN_ERR "Failed to find newline in "
"/proc/cpuinfo, err = %d\n", -n);
return 0;
}
- } while(c != '\n');
+ } while (c != '\n');
}
return 0;
}
@@ -83,46 +83,50 @@ static int check_cpu_flag(char *feature, int *have_it)
char buf[MAXTOKEN], c;
int fd, len = ARRAY_SIZE(buf);
- printk("Checking for host processor %s support...", feature);
+ printk(UM_KERN_INFO "Checking for host processor %s support...",
+ feature);
fd = os_open_file("/proc/cpuinfo", of_read(OPENFLAGS()), 0);
- if(fd < 0){
- printk("Couldn't open /proc/cpuinfo, err = %d\n", -fd);
+ if (fd < 0) {
+ printk(UM_KERN_ERR "Couldn't open /proc/cpuinfo, err = %d\n",
+ -fd);
return 0;
}
*have_it = 0;
- if(!find_cpuinfo_line(fd, "flags", buf, ARRAY_SIZE(buf)))
+ if (!find_cpuinfo_line(fd, "flags", buf, ARRAY_SIZE(buf)))
goto out;
c = token(fd, buf, len - 1, ' ');
- if(c < 0)
+ if (c < 0)
goto out;
- else if(c != ' '){
- printk("Failed to find ' ' in /proc/cpuinfo\n");
+ else if (c != ' ') {
+ printk(UM_KERN_ERR "Failed to find ' ' in /proc/cpuinfo\n");
goto out;
}
- while(1){
+ while (1) {
c = token(fd, buf, len - 1, ' ');
- if(c < 0)
+ if (c < 0)
goto out;
- else if(c == '\n') break;
+ else if (c == '\n')
+ break;
- if(!strcmp(buf, feature)){
+ if (!strcmp(buf, feature)) {
*have_it = 1;
goto out;
}
}
out:
- if(*have_it == 0)
+ if (*have_it == 0)
printk("No\n");
- else if(*have_it == 1)
+ else if (*have_it == 1)
printk("Yes\n");
os_close_file(fd);
return 1;
}
-#if 0 /* This doesn't work in tt mode, plus it's causing compilation problems
+#if 0 /*
+ * This doesn't work in tt mode, plus it's causing compilation problems
* for some people.
*/
static void disable_lcall(void)
@@ -135,8 +139,9 @@ static void disable_lcall(void)
ldt.base_addr = 0;
ldt.limit = 0;
err = modify_ldt(1, &ldt, sizeof(ldt));
- if(err)
- printk("Failed to disable lcall7 - errno = %d\n", errno);
+ if (err)
+ printk(UM_KERN_ERR "Failed to disable lcall7 - errno = %d\n",
+ errno);
}
#endif
@@ -151,40 +156,41 @@ void arch_check_bugs(void)
{
int have_it;
- if(os_access("/proc/cpuinfo", OS_ACC_R_OK) < 0){
- printk("/proc/cpuinfo not available - skipping CPU capability "
- "checks\n");
+ if (os_access("/proc/cpuinfo", OS_ACC_R_OK) < 0) {
+ printk(UM_KERN_ERR "/proc/cpuinfo not available - skipping CPU "
+ "capability checks\n");
return;
}
- if(check_cpu_flag("cmov", &have_it))
+ if (check_cpu_flag("cmov", &have_it))
host_has_cmov = have_it;
- if(check_cpu_flag("xmm", &have_it))
+ if (check_cpu_flag("xmm", &have_it))
host_has_xmm = have_it;
}
-int arch_handle_signal(int sig, union uml_pt_regs *regs)
+int arch_handle_signal(int sig, struct uml_pt_regs *regs)
{
unsigned char tmp[2];
- /* This is testing for a cmov (0x0f 0x4x) instruction causing a
+ /*
+ * This is testing for a cmov (0x0f 0x4x) instruction causing a
* SIGILL in init.
*/
- if((sig != SIGILL) || (TASK_PID(get_current()) != 1))
+ if ((sig != SIGILL) || (TASK_PID(get_current()) != 1))
return 0;
if (copy_from_user_proc(tmp, (void *) UPT_IP(regs), 2))
panic("SIGILL in init, could not read instructions!\n");
- if((tmp[0] != 0x0f) || ((tmp[1] & 0xf0) != 0x40))
+ if ((tmp[0] != 0x0f) || ((tmp[1] & 0xf0) != 0x40))
return 0;
- if(host_has_cmov == 0)
+ if (host_has_cmov == 0)
panic("SIGILL caused by cmov, which this processor doesn't "
"implement, boot a filesystem compiled for older "
"processors");
- else if(host_has_cmov == 1)
+ else if (host_has_cmov == 1)
panic("SIGILL caused by cmov, which this processor claims to "
"implement");
- else if(host_has_cmov == -1)
+ else if (host_has_cmov == -1)
panic("SIGILL caused by cmov, couldn't tell if this processor "
"implements it, boot a filesystem compiled for older "
"processors");
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 09:39:08 +0000