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-rw-r--r--arch/ppc64/boot/prom.c28
-rw-r--r--arch/ppc64/kernel/kprobes.c18
-rw-r--r--arch/ppc64/kernel/misc.S2
-rw-r--r--arch/ppc64/kernel/sys_ppc32.c70
-rw-r--r--arch/ppc64/kernel/syscalls.c33
5 files changed, 87 insertions, 64 deletions
diff --git a/arch/ppc64/boot/prom.c b/arch/ppc64/boot/prom.c
index 7b607d1862c..d5218b15824 100644
--- a/arch/ppc64/boot/prom.c
+++ b/arch/ppc64/boot/prom.c
@@ -11,6 +11,23 @@
#include <linux/string.h>
#include <linux/ctype.h>
+extern __u32 __div64_32(unsigned long long *dividend, __u32 divisor);
+
+/* The unnecessary pointer compare is there
+ * to check for type safety (n must be 64bit)
+ */
+# define do_div(n,base) ({ \
+ __u32 __base = (base); \
+ __u32 __rem; \
+ (void)(((typeof((n)) *)0) == ((unsigned long long *)0)); \
+ if (((n) >> 32) == 0) { \
+ __rem = (__u32)(n) % __base; \
+ (n) = (__u32)(n) / __base; \
+ } else \
+ __rem = __div64_32(&(n), __base); \
+ __rem; \
+ })
+
int (*prom)(void *);
void *chosen_handle;
@@ -352,7 +369,7 @@ static int skip_atoi(const char **s)
#define SPECIAL 32 /* 0x */
#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
-static char * number(char * str, long num, int base, int size, int precision, int type)
+static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
{
char c,sign,tmp[66];
const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
@@ -367,9 +384,9 @@ static char * number(char * str, long num, int base, int size, int precision, in
c = (type & ZEROPAD) ? '0' : ' ';
sign = 0;
if (type & SIGN) {
- if (num < 0) {
+ if ((signed long long)num < 0) {
sign = '-';
- num = -num;
+ num = - (signed long long)num;
size--;
} else if (type & PLUS) {
sign = '+';
@@ -389,8 +406,7 @@ static char * number(char * str, long num, int base, int size, int precision, in
if (num == 0)
tmp[i++]='0';
else while (num != 0) {
- tmp[i++] = digits[num % base];
- num /= base;
+ tmp[i++] = digits[do_div(num, base)];
}
if (i > precision)
precision = i;
@@ -426,7 +442,7 @@ int sprintf(char * buf, const char *fmt, ...);
int vsprintf(char *buf, const char *fmt, va_list args)
{
int len;
- unsigned long num;
+ unsigned long long num;
int i, base;
char * str;
const char *s;
diff --git a/arch/ppc64/kernel/kprobes.c b/arch/ppc64/kernel/kprobes.c
index 103daaf7357..e950a2058a1 100644
--- a/arch/ppc64/kernel/kprobes.c
+++ b/arch/ppc64/kernel/kprobes.c
@@ -45,12 +45,17 @@ static struct pt_regs jprobe_saved_regs;
int arch_prepare_kprobe(struct kprobe *p)
{
+ int ret = 0;
kprobe_opcode_t insn = *p->addr;
- if (IS_MTMSRD(insn) || IS_RFID(insn))
- /* cannot put bp on RFID/MTMSRD */
- return 1;
- return 0;
+ if ((unsigned long)p->addr & 0x03) {
+ printk("Attempt to register kprobe at an unaligned address\n");
+ ret = -EINVAL;
+ } else if (IS_MTMSRD(insn) || IS_RFID(insn)) {
+ printk("Cannot register a kprobe on rfid or mtmsrd\n");
+ ret = -EINVAL;
+ }
+ return ret;
}
void arch_copy_kprobe(struct kprobe *p)
@@ -172,8 +177,6 @@ static void resume_execution(struct kprobe *p, struct pt_regs *regs)
ret = emulate_step(regs, p->ainsn.insn[0]);
if (ret == 0)
regs->nip = (unsigned long)p->addr + 4;
-
- regs->msr &= ~MSR_SE;
}
static inline int post_kprobe_handler(struct pt_regs *regs)
@@ -210,6 +213,7 @@ static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
if (kprobe_status & KPROBE_HIT_SS) {
resume_execution(current_kprobe, regs);
+ regs->msr &= ~MSR_SE;
regs->msr |= kprobe_saved_msr;
unlock_kprobes();
@@ -233,8 +237,6 @@ int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val,
*/
preempt_disable();
switch (val) {
- case DIE_IABR_MATCH:
- case DIE_DABR_MATCH:
case DIE_BPT:
if (kprobe_handler(args->regs))
ret = NOTIFY_STOP;
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index b944717c1db..e3c73b3425d 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -792,7 +792,7 @@ _GLOBAL(sys_call_table32)
.llong .compat_sys_newstat
.llong .compat_sys_newlstat
.llong .compat_sys_newfstat
- .llong .sys_uname
+ .llong .sys32_uname
.llong .sys_ni_syscall /* 110 old iopl syscall */
.llong .sys_vhangup
.llong .sys_ni_syscall /* old idle syscall */
diff --git a/arch/ppc64/kernel/sys_ppc32.c b/arch/ppc64/kernel/sys_ppc32.c
index 7cf7a960002..9c8e317c598 100644
--- a/arch/ppc64/kernel/sys_ppc32.c
+++ b/arch/ppc64/kernel/sys_ppc32.c
@@ -791,31 +791,6 @@ asmlinkage int sys32_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn)
}
-asmlinkage int ppc64_newuname(struct new_utsname __user * name)
-{
- int errno = sys_newuname(name);
-
- if (current->personality == PER_LINUX32 && !errno) {
- if(copy_to_user(name->machine, "ppc\0\0", 8)) {
- errno = -EFAULT;
- }
- }
- return errno;
-}
-
-asmlinkage int ppc64_personality(unsigned long personality)
-{
- int ret;
- if (current->personality == PER_LINUX32 && personality == PER_LINUX)
- personality = PER_LINUX32;
- ret = sys_personality(personality);
- if (ret == PER_LINUX32)
- ret = PER_LINUX;
- return ret;
-}
-
-
-
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
@@ -1158,26 +1133,47 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
}
#endif
+asmlinkage int sys32_uname(struct old_utsname __user * name)
+{
+ int err = 0;
+
+ down_read(&uts_sem);
+ if (copy_to_user(name, &system_utsname, sizeof(*name)))
+ err = -EFAULT;
+ up_read(&uts_sem);
+ if (!err && personality(current->personality) == PER_LINUX32) {
+ /* change "ppc64" to "ppc" */
+ if (__put_user(0, name->machine + 3)
+ || __put_user(0, name->machine + 4))
+ err = -EFAULT;
+ }
+ return err;
+}
+
asmlinkage int sys32_olduname(struct oldold_utsname __user * name)
{
int error;
-
- if (!name)
- return -EFAULT;
+
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
- error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
- error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
- error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
- error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
- error -= __put_user(0,name->release+__OLD_UTS_LEN);
- error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
- error -= __put_user(0,name->version+__OLD_UTS_LEN);
- error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
- error = __put_user(0,name->machine+__OLD_UTS_LEN);
+ error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
+ error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
+ error |= __put_user(0,name->release+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
+ error |= __put_user(0,name->version+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
+ error |= __put_user(0,name->machine+__OLD_UTS_LEN);
+ if (personality(current->personality) == PER_LINUX32) {
+ /* change "ppc64" to "ppc" */
+ error |= __put_user(0, name->machine + 3);
+ error |= __put_user(0, name->machine + 4);
+ }
+
up_read(&uts_sem);
error = error ? -EFAULT : 0;
diff --git a/arch/ppc64/kernel/syscalls.c b/arch/ppc64/kernel/syscalls.c
index f2865ff8d2f..a8cbb202b8c 100644
--- a/arch/ppc64/kernel/syscalls.c
+++ b/arch/ppc64/kernel/syscalls.c
@@ -199,24 +199,33 @@ out:
return ret;
}
-static int __init set_fakeppc(char *str)
+long ppc64_personality(unsigned long personality)
{
- if (*str)
- return 0;
- init_task.personality = PER_LINUX32;
- return 1;
+ long ret;
+
+ if (personality(current->personality) == PER_LINUX32
+ && personality == PER_LINUX)
+ personality = PER_LINUX32;
+ ret = sys_personality(personality);
+ if (ret == PER_LINUX32)
+ ret = PER_LINUX;
+ return ret;
}
-__setup("fakeppc", set_fakeppc);
-asmlinkage int sys_uname(struct old_utsname __user * name)
+long ppc64_newuname(struct new_utsname __user * name)
{
- int err = -EFAULT;
-
+ int err = 0;
+
down_read(&uts_sem);
- if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
- err = 0;
+ if (copy_to_user(name, &system_utsname, sizeof(*name)))
+ err = -EFAULT;
up_read(&uts_sem);
-
+ if (!err && personality(current->personality) == PER_LINUX32) {
+ /* change ppc64 to ppc */
+ if (__put_user(0, name->machine + 3)
+ || __put_user(0, name->machine + 4))
+ err = -EFAULT;
+ }
return err;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-10 03:47:17 +0000