/* Internal definitions for libdwfl.
- Copyright (C) 2005-2012 Red Hat, Inc.
+ Copyright (C) 2005-2014 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
#include <libdwfl.h>
#include <libebl.h>
#include <assert.h>
+#include <dirent.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "../libdw/libdwP.h" /* We need its INTDECLs. */
+#include "../libdwelf/libdwelfP.h"
+
+typedef struct Dwfl_Process Dwfl_Process;
/* gettext helper macros. */
#define _(Str) dgettext ("elfutils", Str)
DWFL_ERROR (BADELF, N_("not a valid ELF file")) \
DWFL_ERROR (WEIRD_TYPE, N_("cannot handle DWARF type description")) \
DWFL_ERROR (WRONG_ID_ELF, N_("ELF file does not match build ID")) \
- DWFL_ERROR (BAD_PRELINK, N_("corrupt .gnu.prelink_undo section data"))
+ DWFL_ERROR (BAD_PRELINK, N_("corrupt .gnu.prelink_undo section data")) \
+ DWFL_ERROR (LIBEBL_BAD, N_("Internal error due to ebl")) \
+ DWFL_ERROR (CORE_MISSING, N_("Missing data in core file")) \
+ DWFL_ERROR (INVALID_REGISTER, N_("Invalid register")) \
+ DWFL_ERROR (PROCESS_MEMORY_READ, N_("Error reading process memory")) \
+ DWFL_ERROR (PROCESS_NO_ARCH, N_("Couldn't find architecture of any ELF")) \
+ DWFL_ERROR (PARSE_PROC, N_("Error parsing /proc filesystem")) \
+ DWFL_ERROR (INVALID_DWARF, N_("Invalid DWARF")) \
+ DWFL_ERROR (UNSUPPORTED_DWARF, N_("Unsupported DWARF")) \
+ DWFL_ERROR (NEXT_THREAD_FAIL, N_("Unable to find more threads")) \
+ DWFL_ERROR (ATTACH_STATE_CONFLICT, N_("Dwfl already has attached state")) \
+ DWFL_ERROR (NO_ATTACH_STATE, N_("Dwfl has no attached state")) \
+ DWFL_ERROR (NO_UNWIND, N_("Unwinding not supported for this architecture")) \
+ DWFL_ERROR (INVALID_ARGUMENT, N_("Invalid argument")) \
+ DWFL_ERROR (NO_CORE_FILE, N_("Not an ET_CORE ELF file"))
#define DWFL_ERROR(name, text) DWFL_E_##name,
typedef enum { DWFL_ERRORS DWFL_E_NUM } Dwfl_Error;
Dwfl_Module *modulelist; /* List in order used by full traversals. */
+ Dwfl_Process *process;
+ Dwfl_Error attacherr; /* Previous error attaching process. */
+
GElf_Addr offline_next_address;
GElf_Addr segment_align; /* Smallest granularity of segments. */
Elf_Data *aux_symxndxdata; /* Data in the extended auxiliary table. */
Dwarf *dw; /* libdw handle for its debugging info. */
+ Dwarf *alt; /* Dwarf used for dwarf_setalt, or NULL. */
+ int alt_fd; /* descriptor, only valid when alt != NULL. */
+ Elf *alt_elf; /* Elf for alt Dwarf. */
Dwfl_Error symerr; /* Previous failure to load symbols. */
Dwfl_Error dwerr; /* Previous failure to load DWARF. */
bool gc; /* Mark/sweep flag. */
};
+/* This holds information common for all the threads/tasks/TIDs of one process
+ for backtraces. */
+
+struct Dwfl_Process
+{
+ struct Dwfl *dwfl;
+ pid_t pid;
+ const Dwfl_Thread_Callbacks *callbacks;
+ void *callbacks_arg;
+ struct ebl *ebl;
+ bool ebl_close:1;
+};
+
+/* See its typedef in libdwfl.h. */
+
+struct Dwfl_Thread
+{
+ Dwfl_Process *process;
+ pid_t tid;
+ /* The current frame being unwound. Initially it is the bottom frame.
+ Later the processed frames get freed and this pointer is updated. */
+ Dwfl_Frame *unwound;
+ void *callbacks_arg;
+};
+
+/* See its typedef in libdwfl.h. */
+
+struct Dwfl_Frame
+{
+ Dwfl_Thread *thread;
+ /* Previous (outer) frame. */
+ Dwfl_Frame *unwound;
+ bool signal_frame : 1;
+ bool initial_frame : 1;
+ enum
+ {
+ /* This structure is still being initialized or there was an error
+ initializing it. */
+ DWFL_FRAME_STATE_ERROR,
+ /* PC field is valid. */
+ DWFL_FRAME_STATE_PC_SET,
+ /* PC field is undefined, this means the next (inner) frame was the
+ outermost frame. */
+ DWFL_FRAME_STATE_PC_UNDEFINED
+ } pc_state;
+ /* Either initialized from appropriate REGS element or on some archs
+ initialized separately as the return address has no DWARF register. */
+ Dwarf_Addr pc;
+ /* (1 << X) bitmask where 0 <= X < ebl_frame_nregs. */
+ uint64_t regs_set[3];
+ /* REGS array size is ebl_frame_nregs.
+ REGS_SET tells which of the REGS are valid. */
+ Dwarf_Addr regs[];
+};
+
+/* Fetch value from Dwfl_Frame->regs indexed by DWARF REGNO.
+ No error code is set if the function returns FALSE. */
+bool __libdwfl_frame_reg_get (Dwfl_Frame *state, unsigned regno,
+ Dwarf_Addr *val)
+ internal_function;
+/* Store value to Dwfl_Frame->regs indexed by DWARF REGNO.
+ No error code is set if the function returns FALSE. */
+bool __libdwfl_frame_reg_set (Dwfl_Frame *state, unsigned regno,
+ Dwarf_Addr val)
+ internal_function;
/* Information cached about each CU in Dwfl_Module.dw. */
struct dwfl_cu
}
static inline GElf_Addr
-dwfl_adjusted_st_value (Dwfl_Module *mod, struct dwfl_file *symfile,
- GElf_Addr addr)
+dwfl_adjusted_st_value (Dwfl_Module *mod, Elf *symelf, GElf_Addr addr)
{
- if (symfile == &mod->main)
+ if (symelf == mod->main.elf)
return dwfl_adjusted_address (mod, addr);
- if (symfile == &mod->debug)
+ if (symelf == mod->debug.elf)
return dwfl_adjusted_dwarf_addr (mod, addr);
return dwfl_adjusted_aux_sym_addr (mod, addr);
}
static inline GElf_Addr
-dwfl_deadjust_st_value (Dwfl_Module *mod, struct dwfl_file *symfile,
- GElf_Addr addr)
+dwfl_deadjust_st_value (Dwfl_Module *mod, Elf *symelf, GElf_Addr addr)
{
- if (symfile == &mod->main)
+ if (symelf == mod->main.elf)
return dwfl_deadjust_address (mod, addr);
- if (symfile == &mod->debug)
+ if (symelf == mod->debug.elf)
return dwfl_deadjust_dwarf_addr (mod, addr);
return dwfl_deadjust_aux_sym_addr (mod, addr);
}
};
+/* Structure used for keeping track of ptrace attaching a thread.
+ Shared by linux-pid-attach and linux-proc-maps. If it has been setup
+ then get the instance through __libdwfl_get_pid_arg. */
+struct __libdwfl_pid_arg
+{
+ DIR *dir;
+ /* It is 0 if not used. */
+ pid_t tid_attached;
+ /* Valid only if TID_ATTACHED is not zero. */
+ bool tid_was_stopped;
+ /* True if threads are ptrace stopped by caller. */
+ bool assume_ptrace_stopped;
+};
+
+/* If DWfl is not NULL and a Dwfl_Process has been setup that has
+ Dwfl_Thread_Callbacks set to pid_thread_callbacks, then return the
+ callbacks_arg, which will be a struct __libdwfl_pid_arg. Otherwise
+ returns NULL. */
+extern struct __libdwfl_pid_arg *__libdwfl_get_pid_arg (Dwfl *dwfl)
+ internal_function;
+
+/* Makes sure the given tid is attached. On success returns true and
+ sets tid_was_stopped. */
+extern bool __libdwfl_ptrace_attach (pid_t tid, bool *tid_was_stoppedp)
+ internal_function;
+
+/* Detaches a tid that was attached through
+ __libdwfl_ptrace_attach. Must be given the tid_was_stopped as set
+ by __libdwfl_ptrace_attach. */
+extern void __libdwfl_ptrace_detach (pid_t tid, bool tid_was_stopped)
+ internal_function;
+
+
+/* Internal wrapper for old dwfl_module_getsym and new dwfl_module_getsym_info.
+ adjust_st_value set to true returns adjusted SYM st_value, set to false
+ it will not adjust SYM at all, but does match against resolved *ADDR. */
+extern const char *__libdwfl_getsym (Dwfl_Module *mod, int ndx, GElf_Sym *sym,
+ GElf_Addr *addr, GElf_Word *shndxp,
+ Elf **elfp, Dwarf_Addr *biasp,
+ bool *resolved, bool adjust_st_value)
+ internal_function;
+
+/* Internal wrapper for old dwfl_module_addrsym and new dwfl_module_addrinfo.
+ adjust_st_value set to true returns adjusted SYM st_value, set to false
+ it will not adjust SYM at all, but does match against resolved values. */
+extern const char *__libdwfl_addrsym (Dwfl_Module *mod, GElf_Addr addr,
+ GElf_Off *off, GElf_Sym *sym,
+ GElf_Word *shndxp, Elf **elfp,
+ Dwarf_Addr *bias,
+ bool adjust_st_value) internal_function;
extern void __libdwfl_module_free (Dwfl_Module *mod) internal_function;
extern Dwfl_Error __libdwfl_relocate (Dwfl_Module *mod, Elf *file, bool debug)
internal_function;
+/* Find the section index in mod->main.elf that contains the given
+ *ADDR. Adjusts *ADDR to be section relative on success, returns
+ SHN_UNDEF on failure. */
+extern size_t __libdwfl_find_section_ndx (Dwfl_Module *mod, Dwarf_Addr *addr)
+ internal_function;
+
/* Process (simple) relocations in arbitrary section TSCN of an ET_REL file.
RELOCSCN is SHT_REL or SHT_RELA and TSCN is its sh_info target section. */
extern Dwfl_Error __libdwfl_relocate_section (Dwfl_Module *mod, Elf *relocated,
GElf_Addr *value)
internal_function;
-
/* Ensure that MOD->ebl is set up. */
extern Dwfl_Error __libdwfl_module_getebl (Dwfl_Module *mod) internal_function;
extern int __libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
const void **build_id_bits,
GElf_Addr *build_id_elfaddr,
- int *build_id_len);
+ int *build_id_len)
+ internal_function;
/* Look in ELF for an NT_GNU_BUILD_ID note. If SET is true, store it
in MOD and return its length. If SET is false, instead compare it
internal_function;
/* Open a main or debuginfo file by its build ID, returns the fd. */
+extern int __libdwfl_open_mod_by_build_id (Dwfl_Module *mod, bool debug,
+ char **file_name) internal_function;
+
+/* Same, but takes an explicit build_id, can also be used for alt debug. */
extern int __libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug,
- char **file_name) internal_function;
+ char **file_name, const size_t id_len,
+ const uint8_t *id) internal_function;
extern uint32_t __libdwfl_crc32 (uint32_t crc, unsigned char *buf, size_t len)
attribute_hidden;
extern int __libdwfl_crc32_file (int fd, uint32_t *resp) attribute_hidden;
+/* Given ELF and some parameters return TRUE if the *P return value parameters
+ have been successfully filled in. Any of the *P parameters can be NULL. */
+extern bool __libdwfl_elf_address_range (Elf *elf, GElf_Addr base,
+ bool add_p_vaddr, bool sanity,
+ GElf_Addr *vaddrp,
+ GElf_Addr *address_syncp,
+ GElf_Addr *startp, GElf_Addr *endp,
+ GElf_Addr *biasp, GElf_Half *e_typep)
+ internal_function;
+
/* Meat of dwfl_report_elf, given elf_begin just called.
Consumes ELF on success, not on failure. */
extern Dwfl_Module *__libdwfl_report_elf (Dwfl *dwfl, const char *name,
const char *))
internal_function;
+/* Free PROCESS. Unlink and free also any structures it references. */
+extern void __libdwfl_process_free (Dwfl_Process *process)
+ internal_function;
+
+/* Update STATE->unwound for the unwound frame.
+ On error STATE->unwound == NULL
+ or STATE->unwound->pc_state == DWFL_FRAME_STATE_ERROR;
+ in such case dwfl_errno () is set.
+ If STATE->unwound->pc_state == DWFL_FRAME_STATE_PC_UNDEFINED
+ then STATE was the last valid frame. */
+extern void __libdwfl_frame_unwind (Dwfl_Frame *state)
+ internal_function;
+
+/* Align segment START downwards or END upwards addresses according to DWFL. */
+extern GElf_Addr __libdwfl_segment_start (Dwfl *dwfl, GElf_Addr start)
+ internal_function;
+extern GElf_Addr __libdwfl_segment_end (Dwfl *dwfl, GElf_Addr end)
+ internal_function;
+
/* Decompression wrappers: decompress whole file into memory. */
extern Dwfl_Error __libdw_gunzip (int fd, off64_t start_offset,
void *mapped, size_t mapped_size,
bool close_on_fail, bool archive_ok)
internal_function;
+/* Fetch PT_DYNAMIC P_VADDR from ELF and store it to *VADDRP. Return success.
+ *VADDRP is not modified if the function fails. */
+extern bool __libdwfl_dynamic_vaddr_get (Elf *elf, GElf_Addr *vaddrp)
+ internal_function;
+
/* These are working nicely for --core, but are not ready to be
exported interfaces quite yet. */
struct r_debug_info_module
{
struct r_debug_info_module *next;
+ /* FD is -1 iff ELF is NULL. */
+ int fd;
+ Elf *elf;
GElf_Addr l_ld;
+ /* START and END are both zero if not valid. */
+ GElf_Addr start, end;
+ bool disk_file_has_build_id;
char name[0];
};
Fill in R_DEBUG_INFO if it is not NULL. It should be cleared by the
caller, this function does not touch fields it does not need to modify.
+ If R_DEBUG_INFO is not NULL then no modules get added to DWFL, caller
+ has to add them from filled in R_DEBUG_INFO.
Returns the number of modules found, or -1 for errors. */
extern int dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size,
INTDECL (dwfl_addrsegment)
INTDECL (dwfl_addrdwarf)
INTDECL (dwfl_addrdie)
+INTDECL (dwfl_core_file_attach)
INTDECL (dwfl_core_file_report)
INTDECL (dwfl_getmodules)
INTDECL (dwfl_module_addrdie)
INTDECL (dwfl_module_address_section)
+INTDECL (dwfl_module_addrinfo)
INTDECL (dwfl_module_addrsym)
INTDECL (dwfl_module_build_id)
INTDECL (dwfl_module_getdwarf)
INTDECL (dwfl_module_getelf)
INTDECL (dwfl_module_getsym)
+INTDECL (dwfl_module_getsym_info)
INTDECL (dwfl_module_getsymtab)
+INTDECL (dwfl_module_getsymtab_first_global)
INTDECL (dwfl_module_getsrc)
INTDECL (dwfl_module_report_build_id)
INTDECL (dwfl_report_elf)
INTDECL (dwfl_link_map_report)
INTDECL (dwfl_linux_kernel_find_elf)
INTDECL (dwfl_linux_kernel_module_section_address)
+INTDECL (dwfl_linux_proc_attach)
INTDECL (dwfl_linux_proc_report)
INTDECL (dwfl_linux_proc_maps_report)
INTDECL (dwfl_linux_proc_find_elf)
INTDECL (dwfl_module_relocate_address)
INTDECL (dwfl_module_dwarf_cfi)
INTDECL (dwfl_module_eh_cfi)
+INTDECL (dwfl_attach_state)
+INTDECL (dwfl_pid)
+INTDECL (dwfl_thread_dwfl)
+INTDECL (dwfl_thread_tid)
+INTDECL (dwfl_frame_thread)
+INTDECL (dwfl_thread_state_registers)
+INTDECL (dwfl_thread_state_register_pc)
+INTDECL (dwfl_getthread_frames)
+INTDECL (dwfl_getthreads)
+INTDECL (dwfl_thread_getframes)
+INTDECL (dwfl_frame_pc)
/* Leading arguments standard to callbacks passed a Dwfl_Module. */
#define MODCB_ARGS(mod) (mod), &(mod)->userdata, (mod)->name, (mod)->low_addr
projects / platform / upstream / elfutils.git / blobdiff