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148 lines
3.5 KiB
148 lines
3.5 KiB
// 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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