mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 00:24:12 +08:00
47e12855a9
Note: compat variant of REGSET_TM_CGPR is almost certainly wrong; it claims to be 48*64bit, but just as compat REGSET_GPR it stores 44*32bit of (truncated) registers + 4 32bit zeros... followed by 48 more 32bit zeroes. Might be too late to change - it's a userland ABI, after all ;-/ Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
// 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)
|
|
{
|
|
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));
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
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);
|
|
}
|