149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/regset.h>
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#include <asm/switch_to.h>
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#include "ptrace-decl.h"
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/*
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* Regardless of transactions, 'fp_state' holds the current running
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* value of all FPR registers and 'ckfp_state' holds the last checkpointed
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* value of all FPR registers for the current transaction.
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*
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* Userspace interface buffer layout:
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*
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* struct data {
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* u64 fpr[32];
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* u64 fpscr;
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* };
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*/
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int fpr_get(struct task_struct *target, const struct user_regset *regset,
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struct membuf to)
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{
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u64 buf[33];
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int i;
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flush_fp_to_thread(target);
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/* copy to local buffer then write that out */
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for (i = 0; i < 32 ; i++)
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buf[i] = target->thread.TS_FPR(i);
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buf[32] = target->thread.fp_state.fpscr;
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return membuf_write(&to, buf, 33 * sizeof(u64));
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}
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/*
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* Regardless of transactions, 'fp_state' holds the current running
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* value of all FPR registers and 'ckfp_state' holds the last checkpointed
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* value of all FPR registers for the current transaction.
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*
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* Userspace interface buffer layout:
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*
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* struct data {
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* u64 fpr[32];
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* u64 fpscr;
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* };
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*
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*/
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int fpr_set(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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u64 buf[33];
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int i;
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flush_fp_to_thread(target);
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for (i = 0; i < 32 ; i++)
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buf[i] = target->thread.TS_FPR(i);
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buf[32] = target->thread.fp_state.fpscr;
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/* copy to local buffer then write that out */
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i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
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if (i)
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return i;
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for (i = 0; i < 32 ; i++)
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target->thread.TS_FPR(i) = buf[i];
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target->thread.fp_state.fpscr = buf[32];
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return 0;
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}
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/*
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* Currently to set and and get all the vsx state, you need to call
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* the fp and VMX calls as well. This only get/sets the lower 32
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* 128bit VSX registers.
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*/
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int vsr_active(struct task_struct *target, const struct user_regset *regset)
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{
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flush_vsx_to_thread(target);
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return target->thread.used_vsr ? regset->n : 0;
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}
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/*
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* Regardless of transactions, 'fp_state' holds the current running
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* value of all FPR registers and 'ckfp_state' holds the last
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* checkpointed value of all FPR registers for the current
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* transaction.
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*
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* Userspace interface buffer layout:
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*
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* struct data {
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* u64 vsx[32];
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* };
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*/
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int vsr_get(struct task_struct *target, const struct user_regset *regset,
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struct membuf to)
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{
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u64 buf[32];
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int i;
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flush_tmregs_to_thread(target);
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flush_fp_to_thread(target);
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flush_altivec_to_thread(target);
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flush_vsx_to_thread(target);
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for (i = 0; i < 32 ; i++)
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buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
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return membuf_write(&to, buf, 32 * sizeof(double));
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}
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/*
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* Regardless of transactions, 'fp_state' holds the current running
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* value of all FPR registers and 'ckfp_state' holds the last
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* checkpointed value of all FPR registers for the current
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* transaction.
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*
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* Userspace interface buffer layout:
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*
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* struct data {
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* u64 vsx[32];
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* };
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*/
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int vsr_set(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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u64 buf[32];
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int ret, i;
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flush_tmregs_to_thread(target);
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flush_fp_to_thread(target);
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flush_altivec_to_thread(target);
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flush_vsx_to_thread(target);
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for (i = 0; i < 32 ; i++)
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buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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buf, 0, 32 * sizeof(double));
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if (!ret)
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for (i = 0; i < 32 ; i++)
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target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
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return ret;
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}
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