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/* -*- linux-c -*-
* Copyright (C) 2005-2008 Red Hat Inc.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _STP_SYM_H_
#define _STP_SYM_H_
struct _stp_symbol {
unsigned long addr;
const char *symbol;
};
struct _stp_section {
const char *name;
unsigned long static_addr; /* XXX non-null if everywhere the same. */
unsigned long size; /* length of the address space module covers. */
struct _stp_symbol *symbols; /* ordered by address */
unsigned num_symbols;
};
struct _stp_module {
const char* name;
const char* path; /* canonical path used for runtime matching. */
struct _stp_section *sections;
unsigned num_sections;
/* A pointer to the struct module. Note that we cannot */
/* trust this because as of 2.6.19, there are not yet */
/* any notifier hooks that will tell us when a module */
/* is unloading. */
unsigned long module; /* XXX: why not struct module * ? */
/* This is to undo .debug_frame relocation performed by elfutils, */
/* which is done during the translate phase when we encode the */
/* unwind data into the module. See adjustStartLoc() in unwind.c. */
unsigned long dwarf_module_base;
/* the stack unwind data for this module */
void *debug_frame;
void *eh_frame;
void *unwind_hdr;
uint32_t debug_frame_len;
uint32_t eh_frame_len;
uint32_t unwind_hdr_len;
unsigned long eh_frame_addr; /* Orig load address (offset) .eh_frame */
unsigned long unwind_hdr_addr; /* same for .eh_frame_hdr */
/* build-id information */
unsigned char *build_id_bits;
unsigned long build_id_offset;
unsigned long notes_sect;
int build_id_len;
};
/* Defined by translator-generated stap-symbols.h. */
static struct _stp_module *_stp_modules [];
static unsigned _stp_num_modules;
/* Used in the unwinder to special case unwinding through kretprobes. */
/* Initialized through translator (stap-symbols.h) relative to kernel */
/* load address, fixup by transport symbols _stp_do_relocation */
static unsigned long _stp_kretprobe_trampoline;
/* Indicates some modules requested the task finder to notify sym.c
_stp_sym_init () should track vma maps. */
static char _stp_need_vma_tracker;
static unsigned long _stp_module_relocate (const char *module,
const char *section,
unsigned long offset,
struct task_struct *tsk);
static struct _stp_module *_stp_get_unwind_info (unsigned long addr);
#endif /* _STP_SYM_H_ */
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