mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-25 21:24:08 +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>
61 lines
1.4 KiB
C
61 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"
|
|
|
|
/*
|
|
* For get_evrregs/set_evrregs functions 'data' has the following layout:
|
|
*
|
|
* struct {
|
|
* u32 evr[32];
|
|
* u64 acc;
|
|
* u32 spefscr;
|
|
* }
|
|
*/
|
|
|
|
int evr_active(struct task_struct *target, const struct user_regset *regset)
|
|
{
|
|
flush_spe_to_thread(target);
|
|
return target->thread.used_spe ? regset->n : 0;
|
|
}
|
|
|
|
int evr_get(struct task_struct *target, const struct user_regset *regset,
|
|
struct membuf to)
|
|
{
|
|
flush_spe_to_thread(target);
|
|
|
|
membuf_write(&to, &target->thread.evr, sizeof(target->thread.evr));
|
|
|
|
BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
|
|
offsetof(struct thread_struct, spefscr));
|
|
|
|
return membuf_write(&to, &target->thread.acc,
|
|
sizeof(u64) + sizeof(u32));
|
|
}
|
|
|
|
int evr_set(struct task_struct *target, const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
const void *kbuf, const void __user *ubuf)
|
|
{
|
|
int ret;
|
|
|
|
flush_spe_to_thread(target);
|
|
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
|
&target->thread.evr,
|
|
0, sizeof(target->thread.evr));
|
|
|
|
BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
|
|
offsetof(struct thread_struct, spefscr));
|
|
|
|
if (!ret)
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
|
&target->thread.acc,
|
|
sizeof(target->thread.evr), -1);
|
|
|
|
return ret;
|
|
}
|