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64 lines
1.6 KiB
64 lines
1.6 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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#ifdef CONFIG_PPC_FPU_REGS |
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BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) != |
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offsetof(struct thread_fp_state, fpr[32])); |
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flush_fp_to_thread(target); |
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return membuf_write(&to, &target->thread.fp_state, 33 * sizeof(u64)); |
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#else |
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return membuf_write(&to, &empty_zero_page, 33 * sizeof(u64)); |
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#endif |
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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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#ifdef CONFIG_PPC_FPU_REGS |
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BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) != |
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offsetof(struct thread_fp_state, fpr[32])); |
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flush_fp_to_thread(target); |
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.fp_state, 0, -1); |
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#else |
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return 0; |
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#endif |
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}
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