[mirror_ubuntu-focal-kernel.git] / arch / arm / kernel / perf_regs.c

// SPDX-License-Identifier: GPL-2.0

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/perf_event.h>
#include <linux/bug.h>
#include <linux/sched/task_stack.h>
#include <asm/perf_regs.h>
#include <asm/ptrace.h>

u64 perf_reg_value(struct pt_regs *regs, int idx)
{
	if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM_MAX))
		return 0;

	return regs->uregs[idx];
}

#define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1))

int perf_reg_validate(u64 mask)
{
	if (!mask || mask & REG_RESERVED)
		return -EINVAL;

	return 0;
}

u64 perf_reg_abi(struct task_struct *task)
{
	return PERF_SAMPLE_REGS_ABI_32;
}

void perf_get_regs_user(struct perf_regs *regs_user,
			struct pt_regs *regs,
			struct pt_regs *regs_user_copy)
{
	regs_user->regs = task_pt_regs(current);
	regs_user->abi = perf_reg_abi(current);
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
49863894 WD	2
	3	#include <linux/errno.h>
	4	#include <linux/kernel.h>
	5	#include <linux/perf_event.h>
	6	#include <linux/bug.h>
68db0cf1	7	#include <linux/sched/task_stack.h>
49863894 WD	8	#include <asm/perf_regs.h>
	9	#include <asm/ptrace.h>
	10
	11	u64 perf_reg_value(struct pt_regs *regs, int idx)
	12	{
	13	if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM_MAX))
	14	return 0;
	15
	16	return regs->uregs[idx];
	17	}
	18
	19	#define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1))
	20
	21	int perf_reg_validate(u64 mask)
	22	{
	23	if (!mask \|\| mask & REG_RESERVED)
	24	return -EINVAL;
	25
	26	return 0;
	27	}
	28
	29	u64 perf_reg_abi(struct task_struct *task)
	30	{
	31	return PERF_SAMPLE_REGS_ABI_32;
	32	}
88a7c26a AL	33
	34	void perf_get_regs_user(struct perf_regs *regs_user,
	35	struct pt_regs *regs,
	36	struct pt_regs *regs_user_copy)
	37	{
	38	regs_user->regs = task_pt_regs(current);
	39	regs_user->abi = perf_reg_abi(current);
	40	}