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[S390] 64-bit register support for 31-bit processes

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From: Heiko Carstens <heiko.carstens@de.ibm.com>
From: Martin Schwidefsky <schwidefsky@de.ibm.com>

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2009-10-06 10:34:13 +02:00
committed by Martin Schwidefsky
parent dd43bfca43
commit ea2a4d3a3a
7 changed files with 148 additions and 4 deletions
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70
arch/s390/kernel/ptrace.c
View File

@@ -57,6 +57,7 @@
enum s390_regset {
REGSET_GENERAL,
REGSET_FP,
REGSET_GENERAL_EXTENDED,
};
static void
@@ -879,6 +880,67 @@ static int s390_compat_regs_set(struct task_struct *target,
return rc;
}
static int s390_compat_regs_high_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
compat_ulong_t *gprs_high;
gprs_high = (compat_ulong_t *)
&task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
if (kbuf) {
compat_ulong_t *k = kbuf;
while (count > 0) {
*k++ = *gprs_high;
gprs_high += 2;
count -= sizeof(*k);
}
} else {
compat_ulong_t __user *u = ubuf;
while (count > 0) {
if (__put_user(*gprs_high, u++))
return -EFAULT;
gprs_high += 2;
count -= sizeof(*u);
}
}
return 0;
}
static int s390_compat_regs_high_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
compat_ulong_t *gprs_high;
int rc = 0;
gprs_high = (compat_ulong_t *)
&task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
if (kbuf) {
const compat_ulong_t *k = kbuf;
while (count > 0) {
*gprs_high = *k++;
*gprs_high += 2;
count -= sizeof(*k);
}
} else {
const compat_ulong_t __user *u = ubuf;
while (count > 0 && !rc) {
unsigned long word;
rc = __get_user(word, u++);
if (rc)
break;
*gprs_high = word;
*gprs_high += 2;
count -= sizeof(*u);
}
}
return rc;
}
static const struct user_regset s390_compat_regsets[] = {
[REGSET_GENERAL] = {
.core_note_type = NT_PRSTATUS,
@@ -896,6 +958,14 @@ static const struct user_regset s390_compat_regsets[] = {
.get = s390_fpregs_get,
.set = s390_fpregs_set,
},
[REGSET_GENERAL_EXTENDED] = {
.core_note_type = NT_PRXSTATUS,
.n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
.size = sizeof(compat_long_t),
.align = sizeof(compat_long_t),
.get = s390_compat_regs_high_get,
.set = s390_compat_regs_high_set,
},
};
static const struct user_regset_view user_s390_compat_view = {