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Diffstat (limited to 'arch/tile/include/asm/backtrace.h')
| -rw-r--r-- | arch/tile/include/asm/backtrace.h | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/arch/tile/include/asm/backtrace.h b/arch/tile/include/asm/backtrace.h deleted file mode 100644 index bd5399a69edf..000000000000 --- a/arch/tile/include/asm/backtrace.h +++ /dev/null @@ -1,162 +0,0 @@ -/* - * Copyright 2010 Tilera Corporation. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#ifndef _ASM_TILE_BACKTRACE_H -#define _ASM_TILE_BACKTRACE_H - -#include <linux/types.h> - -/* Reads 'size' bytes from 'address' and writes the data to 'result'. - * Returns true if successful, else false (e.g. memory not readable). - */ -typedef bool (*BacktraceMemoryReader)(void *result, - unsigned long address, - unsigned int size, - void *extra); - -typedef struct { - /* Current PC. */ - unsigned long pc; - - /* Current stack pointer value. */ - unsigned long sp; - - /* Current frame pointer value (i.e. caller's stack pointer) */ - unsigned long fp; - - /* Internal use only: caller's PC for first frame. */ - unsigned long initial_frame_caller_pc; - - /* Internal use only: callback to read memory. */ - BacktraceMemoryReader read_memory_func; - - /* Internal use only: arbitrary argument to read_memory_func. */ - void *read_memory_func_extra; - -} BacktraceIterator; - - -typedef enum { - - /* We have no idea what the caller's pc is. */ - PC_LOC_UNKNOWN, - - /* The caller's pc is currently in lr. */ - PC_LOC_IN_LR, - - /* The caller's pc can be found by dereferencing the caller's sp. */ - PC_LOC_ON_STACK - -} CallerPCLocation; - - -typedef enum { - - /* We have no idea what the caller's sp is. */ - SP_LOC_UNKNOWN, - - /* The caller's sp is currently in r52. */ - SP_LOC_IN_R52, - - /* The caller's sp can be found by adding a certain constant - * to the current value of sp. - */ - SP_LOC_OFFSET - -} CallerSPLocation; - - -/* Bit values ORed into CALLER_* values for info ops. */ -enum { - /* Setting the low bit on any of these values means the info op - * applies only to one bundle ago. - */ - ONE_BUNDLE_AGO_FLAG = 1, - - /* Setting this bit on a CALLER_SP_* value means the PC is in LR. - * If not set, PC is on the stack. - */ - PC_IN_LR_FLAG = 2, - - /* This many of the low bits of a CALLER_SP_* value are for the - * flag bits above. - */ - NUM_INFO_OP_FLAGS = 2, - - /* We cannot have one in the memory pipe so this is the maximum. */ - MAX_INFO_OPS_PER_BUNDLE = 2 -}; - - -/* Internal constants used to define 'info' operands. */ -enum { - /* 0 and 1 are reserved, as are all negative numbers. */ - - CALLER_UNKNOWN_BASE = 2, - - CALLER_SP_IN_R52_BASE = 4, - - CALLER_SP_OFFSET_BASE = 8, -}; - - -/* Current backtracer state describing where it thinks the caller is. */ -typedef struct { - /* - * Public fields - */ - - /* How do we find the caller's PC? */ - CallerPCLocation pc_location : 8; - - /* How do we find the caller's SP? */ - CallerSPLocation sp_location : 8; - - /* If sp_location == SP_LOC_OFFSET, then caller_sp == sp + - * loc->sp_offset. Else this field is undefined. - */ - uint16_t sp_offset; - - /* In the most recently visited bundle a terminating bundle? */ - bool at_terminating_bundle; - - /* - * Private fields - */ - - /* Will the forward scanner see someone clobbering sp - * (i.e. changing it with something other than addi sp, sp, N?) - */ - bool sp_clobber_follows; - - /* Operand to next "visible" info op (no more than one bundle past - * the next terminating bundle), or -32768 if none. - */ - int16_t next_info_operand; - - /* Is the info of in next_info_op in the very next bundle? */ - bool is_next_info_operand_adjacent; - -} CallerLocation; - -extern void backtrace_init(BacktraceIterator *state, - BacktraceMemoryReader read_memory_func, - void *read_memory_func_extra, - unsigned long pc, unsigned long lr, - unsigned long sp, unsigned long r52); - - -extern bool backtrace_next(BacktraceIterator *state); - -#endif /* _ASM_TILE_BACKTRACE_H */ |