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68 lines
1.4 KiB
68 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Some parts derived from x86 version of this file. |
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* |
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* Copyright (C) 2013 Cavium, Inc. |
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*/ |
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#include <linux/perf_event.h> |
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#include <asm/ptrace.h> |
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#ifdef CONFIG_32BIT |
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u64 perf_reg_abi(struct task_struct *tsk) |
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{ |
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return PERF_SAMPLE_REGS_ABI_32; |
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} |
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#else /* Must be CONFIG_64BIT */ |
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u64 perf_reg_abi(struct task_struct *tsk) |
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{ |
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if (test_tsk_thread_flag(tsk, TIF_32BIT_REGS)) |
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return PERF_SAMPLE_REGS_ABI_32; |
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else |
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return PERF_SAMPLE_REGS_ABI_64; |
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} |
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#endif /* CONFIG_32BIT */ |
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int perf_reg_validate(u64 mask) |
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{ |
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if (!mask) |
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return -EINVAL; |
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if (mask & ~((1ull << PERF_REG_MIPS_MAX) - 1)) |
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return -EINVAL; |
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return 0; |
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} |
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u64 perf_reg_value(struct pt_regs *regs, int idx) |
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{ |
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long v; |
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switch (idx) { |
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case PERF_REG_MIPS_PC: |
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v = regs->cp0_epc; |
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break; |
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case PERF_REG_MIPS_R1 ... PERF_REG_MIPS_R25: |
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v = regs->regs[idx - PERF_REG_MIPS_R1 + 1]; |
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break; |
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case PERF_REG_MIPS_R28 ... PERF_REG_MIPS_R31: |
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v = regs->regs[idx - PERF_REG_MIPS_R28 + 28]; |
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break; |
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default: |
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WARN_ON_ONCE(1); |
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return 0; |
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} |
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return (s64)v; /* Sign extend if 32-bit. */ |
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} |
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void perf_get_regs_user(struct perf_regs *regs_user, |
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struct pt_regs *regs) |
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{ |
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regs_user->regs = task_pt_regs(current); |
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regs_user->abi = perf_reg_abi(current); |
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}
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