X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fsolist.h;h=ee99fc815b5da3cc50e61b5d8fe4f17b906094af;hb=bab05c83ac4333bb087a41f843af0e66218ec054;hp=38928796404b26db078727eff03f91bcbe34694f;hpb=a9762ec78a53fbe9209fe1654db42df0cd328d50;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/solist.h b/gdb/solist.h index 3892879640..ee99fc815b 100644 --- a/gdb/solist.h +++ b/gdb/solist.h @@ -1,6 +1,5 @@ /* Shared library declarations for GDB, the GNU Debugger. - Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, - 2001, 2007 Free Software Foundation, Inc. + Copyright (C) 1990-2019 Free Software Foundation, Inc. This file is part of GDB. @@ -23,124 +22,185 @@ #define SO_NAME_MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */ /* For domain_enum domain. */ #include "symtab.h" +#include "gdb_bfd.h" -/* Forward declaration for target specific link map information. This - struct is opaque to all but the target specific file. */ -struct lm_info; +#define ALL_SO_LIBS(so) \ + for (so = so_list_head; \ + so != NULL; \ + so = so->next) -struct so_list - { - /* The following fields of the structure come directly from the - dynamic linker's tables in the inferior, and are initialized by - current_sos. */ - - struct so_list *next; /* next structure in linked list */ - - /* A pointer to target specific link map information. Often this - will be a copy of struct link_map from the user process, but - it need not be; it can be any collection of data needed to - traverse the dynamic linker's data structures. */ - struct lm_info *lm_info; - - /* Shared object file name, exactly as it appears in the - inferior's link map. This may be a relative path, or something - which needs to be looked up in LD_LIBRARY_PATH, etc. We use it - to tell which entries in the inferior's dynamic linker's link - map we've already loaded. */ - char so_original_name[SO_NAME_MAX_PATH_SIZE]; - - /* shared object file name, expanded to something GDB can open */ - char so_name[SO_NAME_MAX_PATH_SIZE]; - - /* The following fields of the structure are built from - information gathered from the shared object file itself, and - are set when we actually add it to our symbol tables. - - current_sos must initialize these fields to 0. */ - - bfd *abfd; - char symbols_loaded; /* flag: symbols read in yet? */ - char from_tty; /* flag: print msgs? */ - struct objfile *objfile; /* objfile for loaded lib */ - struct section_table *sections; - struct section_table *sections_end; - - /* Record the range of addresses belonging to this shared library. - There may not be just one (e.g. if two segments are relocated - differently); but this is only used for "info sharedlibrary". */ - CORE_ADDR addr_low, addr_high; - }; - -struct target_so_ops - { - /* Adjust the section binding addresses by the base address at - which the object was actually mapped. */ - void (*relocate_section_addresses) (struct so_list *so, - struct section_table *); +/* Base class for target-specific link map information. */ - /* Free the the link map info and any other private data - structures associated with a so_list entry. */ - void (*free_so) (struct so_list *so); +struct lm_info_base +{ +}; - /* Reset or free private data structures not associated with - so_list entries. */ - void (*clear_solib) (void); - - /* Target dependent code to run after child process fork. */ - void (*solib_create_inferior_hook) (void); - - /* Do additional symbol handling, lookup, etc. after symbols - for a shared object have been loaded. */ - void (*special_symbol_handling) (void); +struct so_list +{ + /* The following fields of the structure come directly from the + dynamic linker's tables in the inferior, and are initialized by + current_sos. */ + + struct so_list *next; /* next structure in linked list */ + + /* A pointer to target specific link map information. Often this + will be a copy of struct link_map from the user process, but + it need not be; it can be any collection of data needed to + traverse the dynamic linker's data structures. */ + lm_info_base *lm_info; + + /* Shared object file name, exactly as it appears in the + inferior's link map. This may be a relative path, or something + which needs to be looked up in LD_LIBRARY_PATH, etc. We use it + to tell which entries in the inferior's dynamic linker's link + map we've already loaded. */ + char so_original_name[SO_NAME_MAX_PATH_SIZE]; + + /* Shared object file name, expanded to something GDB can open. */ + char so_name[SO_NAME_MAX_PATH_SIZE]; + + /* Program space this shared library belongs to. */ + struct program_space *pspace; + + /* The following fields of the structure are built from + information gathered from the shared object file itself, and + are set when we actually add it to our symbol tables. + + current_sos must initialize these fields to 0. */ + + bfd *abfd; + char symbols_loaded; /* flag: symbols read in yet? */ + + /* objfile with symbols for a loaded library. Target memory is read from + ABFD. OBJFILE may be NULL either before symbols have been loaded, if + the file cannot be found or after the command "nosharedlibrary". */ + struct objfile *objfile; + + struct target_section *sections; + struct target_section *sections_end; + + /* Record the range of addresses belonging to this shared library. + There may not be just one (e.g. if two segments are relocated + differently). This is used for "info sharedlibrary" and + the MI command "-file-list-shared-libraries". The latter has a format + that supports outputting multiple segments once the related code + supports them. */ + CORE_ADDR addr_low, addr_high; +}; - /* Construct a list of the currently loaded shared objects. */ - struct so_list *(*current_sos) (void); +struct target_so_ops +{ + /* Adjust the section binding addresses by the base address at + which the object was actually mapped. */ + void (*relocate_section_addresses) (struct so_list *so, + struct target_section *); + + /* Free the link map info and any other private data structures + associated with a so_list entry. */ + void (*free_so) (struct so_list *so); + + /* Reset private data structures associated with SO. + This is called when SO is about to be reloaded. + It is also called before free_so when SO is about to be freed. */ + void (*clear_so) (struct so_list *so); + + /* Reset or free private data structures not associated with + so_list entries. */ + void (*clear_solib) (void); + + /* Target dependent code to run after child process fork. */ + void (*solib_create_inferior_hook) (int from_tty); + + /* Construct a list of the currently loaded shared objects. This + list does not include an entry for the main executable file. + + Note that we only gather information directly available from the + inferior --- we don't examine any of the shared library files + themselves. The declaration of `struct so_list' says which fields + we provide values for. */ + struct so_list *(*current_sos) (void); + + /* Find, open, and read the symbols for the main executable. If + FROM_TTY is non-zero, allow messages to be printed. */ + int (*open_symbol_file_object) (int from_ttyp); + + /* Determine if PC lies in the dynamic symbol resolution code of + the run time loader. */ + int (*in_dynsym_resolve_code) (CORE_ADDR pc); + + /* Find and open shared library binary file. */ + gdb_bfd_ref_ptr (*bfd_open) (const char *pathname); + + /* Optional extra hook for finding and opening a solib. + If TEMP_PATHNAME is non-NULL: If the file is successfully opened a + pointer to a malloc'd and realpath'd copy of SONAME is stored there, + otherwise NULL is stored there. */ + int (*find_and_open_solib) (const char *soname, + unsigned o_flags, + gdb::unique_xmalloc_ptr *temp_pathname); + + /* Given two so_list objects, one from the GDB thread list + and another from the list returned by current_sos, return 1 + if they represent the same library. + Falls back to using strcmp on so_original_name field when set + to NULL. */ + int (*same) (struct so_list *gdb, struct so_list *inferior); + + /* Return whether a region of memory must be kept in a core file + for shared libraries loaded before "gcore" is used to be + handled correctly when the core file is loaded. This only + applies when the section would otherwise not be kept in the + core file (in particular, for readonly sections). */ + int (*keep_data_in_core) (CORE_ADDR vaddr, + unsigned long size); + + /* Enable or disable optional solib event breakpoints as + appropriate. This should be called whenever + stop_on_solib_events is changed. This pointer can be + NULL, in which case no enabling or disabling is necessary + for this target. */ + void (*update_breakpoints) (void); + + /* Target-specific processing of solib events that will be + performed before solib_add is called. This pointer can be + NULL, in which case no specific preprocessing is necessary + for this target. */ + void (*handle_event) (void); +}; - /* Find, open, and read the symbols for the main executable. */ - int (*open_symbol_file_object) (void *from_ttyp); +/* Free the memory associated with a (so_list *). */ +void free_so (struct so_list *so); - /* Determine if PC lies in the dynamic symbol resolution code of - the run time loader */ - int (*in_dynsym_resolve_code) (CORE_ADDR pc); +/* A deleter that calls free_so. */ +struct so_deleter +{ + void operator() (struct so_list *so) const + { + free_so (so); + } +}; - /* Extra hook for finding and opening a solib. - Convenience function for remote debuggers finding host libs. */ - int (*find_and_open_solib) (char *soname, - unsigned o_flags, char **temp_pathname); +/* A unique pointer to a so_list. */ +typedef std::unique_ptr so_list_up; - /* Hook for looking up global symbols in a library-specific way. */ - struct symbol * (*lookup_lib_global_symbol) (const struct objfile *objfile, - const char *name, - const char *linkage_name, - const domain_enum domain, - struct symtab **symtab); +/* Return address of first so_list entry in master shared object list. */ +struct so_list *master_so_list (void); - }; +/* Find main executable binary file. */ +extern gdb::unique_xmalloc_ptr exec_file_find (const char *in_pathname, + int *fd); -/* Free the memory associated with a (so_list *). */ -void free_so (struct so_list *so); +/* Find shared library binary file. */ +extern gdb::unique_xmalloc_ptr solib_find (const char *in_pathname, + int *fd); -/* Return address of first so_list entry in master shared object list. */ -struct so_list *master_so_list (void); +/* Open BFD for shared library file. */ +extern gdb_bfd_ref_ptr solib_bfd_fopen (const char *pathname, int fd); /* Find solib binary file and open it. */ -extern int solib_open (char *in_pathname, char **found_pathname); +extern gdb_bfd_ref_ptr solib_bfd_open (const char *in_pathname); -/* FIXME: gdbarch needs to control this variable */ +/* FIXME: gdbarch needs to control this variable. */ extern struct target_so_ops *current_target_so_ops; -#define TARGET_SO_RELOCATE_SECTION_ADDRESSES \ - (current_target_so_ops->relocate_section_addresses) -#define TARGET_SO_FIND_AND_OPEN_SOLIB \ - (current_target_so_ops->find_and_open_solib) -#define TARGET_SO_IN_DYNSYM_RESOLVE_CODE \ - (current_target_so_ops->in_dynsym_resolve_code) - -/* Handler for library-specific global symbol lookup in solib.c. */ -struct symbol *solib_global_lookup (const struct objfile *objfile, - const char *name, - const char *linkage_name, - const domain_enum domain, - struct symtab **symtab); - #endif