Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Christophe Leroy |
140 |
68.63% |
2 |
20.00% |
| Roland McGrath |
32 |
15.69% |
1 |
10.00% |
| Al Viro |
19 |
9.31% |
1 |
10.00% |
| Cyril Bur |
8 |
3.92% |
3 |
30.00% |
| Paul Mackerras |
2 |
0.98% |
1 |
10.00% |
| Linus Torvalds (pre-git) |
2 |
0.98% |
1 |
10.00% |
| David Howells |
1 |
0.49% |
1 |
10.00% |
| Total |
204 |
|
10 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/regset.h>
#include <asm/switch_to.h>
#include "ptrace-decl.h"
/*
* Regardless of transactions, 'fp_state' holds the current running
* value of all FPR registers and 'ckfp_state' holds the last checkpointed
* value of all FPR registers for the current transaction.
*
* Userspace interface buffer layout:
*
* struct data {
* u64 fpr[32];
* u64 fpscr;
* };
*/
int fpr_get(struct task_struct *target, const struct user_regset *regset,
struct membuf to)
{
#ifdef CONFIG_PPC_FPU_REGS
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));
flush_fp_to_thread(target);
return membuf_write(&to, &target->thread.fp_state, 33 * sizeof(u64));
#else
return membuf_write(&to, &empty_zero_page, 33 * sizeof(u64));
#endif
}
/*
* Regardless of transactions, 'fp_state' holds the current running
* value of all FPR registers and 'ckfp_state' holds the last checkpointed
* value of all FPR registers for the current transaction.
*
* Userspace interface buffer layout:
*
* struct data {
* u64 fpr[32];
* u64 fpscr;
* };
*
*/
int fpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
#ifdef CONFIG_PPC_FPU_REGS
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));
flush_fp_to_thread(target);
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fp_state, 0, -1);
#else
return 0;
#endif
}