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/*
* drivers/misc/tegra-profiler/backtrace.h
*
* Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#ifndef __QUADD_BACKTRACE_H
#define __QUADD_BACKTRACE_H
#include <linux/mm.h>
#include <linux/bitops.h>
#define QUADD_MAX_STACK_DEPTH 64
#define QUADD_UNW_TYPES_SIZE \
DIV_ROUND_UP(QUADD_MAX_STACK_DEPTH * 4, sizeof(u32) * BITS_PER_BYTE)
struct quadd_callchain {
int nr;
union {
u32 ip_32[QUADD_MAX_STACK_DEPTH];
u64 ip_64[QUADD_MAX_STACK_DEPTH];
};
u32 types[QUADD_UNW_TYPES_SIZE];
int cs_64;
unsigned int unw_method;
unsigned int unw_rc;
unsigned long curr_sp;
unsigned long curr_fp;
unsigned long curr_pc;
};
struct quadd_ctx;
struct pt_regs;
unsigned int
quadd_get_user_callchain(struct pt_regs *regs,
struct quadd_callchain *cc_data,
struct quadd_ctx *ctx,
struct task_struct *task);
int
quadd_callchain_store(struct quadd_callchain *cc,
unsigned long ip, unsigned int type);
unsigned long
quadd_user_stack_pointer(struct pt_regs *regs);
unsigned long
quadd_get_user_frame_pointer(struct pt_regs *regs);
unsigned long
quadd_user_link_register(struct pt_regs *regs);
static inline int
is_vma_addr(unsigned long addr, struct vm_area_struct *vma,
unsigned long nbytes)
{
return vma &&
addr >= vma->vm_start &&
addr < vma->vm_end - nbytes;
}
static inline int
validate_pc_addr(unsigned long addr, unsigned long nbytes)
{
return addr && addr < TASK_SIZE - nbytes;
}
static inline int
validate_stack_addr(unsigned long addr,
struct vm_area_struct *vma,
unsigned long nbytes)
{
if (addr & 0x03)
return 0;
return is_vma_addr(addr, vma, nbytes);
}
#endif /* __QUADD_BACKTRACE_H */
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