diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | elf/dlfcn.h | 49 | ||||
| -rw-r--r-- | elf/elf.h | 12 |
3 files changed, 66 insertions, 2 deletions
@@ -1,5 +1,12 @@ +Thu Mar 30 01:38:00 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + + * elf/elf.h (STN_UNDEF): New macro (distinct from SHN_UNDEF, though + both are zero). + Wed Mar 29 11:26:48 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + * elf/dlfcn.h: New file. + * Make-dist (README): Commit it to CVS if there is a CVS directory. More changes from Germano Caronni <caronni@tik.ethz.ch>: diff --git a/elf/dlfcn.h b/elf/dlfcn.h new file mode 100644 index 0000000..e5d68f8 --- /dev/null +++ b/elf/dlfcn.h @@ -0,0 +1,49 @@ +/* dlfcn.h -- User functions for run-time dynamic loading. +Copyright (C) 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library 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. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef _DLFCN_H +#define _DLFCN_H 1 + + +/* Type of the second argument to `dlopen'. */ +typedef enum + { + RTLD_LAZY = 1, /* Lazy function call binding. */ + RTLD_NOW = 2 /* Immediate function call binding. */ + } dl_open_mode; + +/* Open the shared object FILE and map it in; return a handle that can be + passed to `dlsym' to get symbol values from it. */ +extern void *dlopen (const char *__file, dl_open_mode); + +/* Unmap and close a shared object opened by `dlopen'. + The handle cannot be used again after calling `dlclose'. */ +extern int dlclose (void *__handle); + +/* Find the run-time address in the shared object HANDLE refers to + of the symbol called NAME. */ +extern void *dlsym (void *__handle, const char *__name); + +/* When any of the above functions fails, call this function + to return a string describing the error. Each call resets + the error string so that a following call returns null. */ +extern char *dlerror (void); + + +#endif /* dlfcn.h */ @@ -188,9 +188,9 @@ typedef struct Elf32_Half st_shndx; /* Section index */ } Elf32_Sym; -/* Special symbol index. */ +/* Special section index. */ -#define SHN_UNDEF 0 /* Undefined symbol */ +#define SHN_UNDEF 0 /* No section, undefined symbol. */ /* How to extract and insert information held in the st_info field. */ @@ -216,6 +216,14 @@ typedef struct #define STT_LOPROC 13 /* Start of processor-specific */ #define STT_HIPROC 15 /* End of processor-specific */ + +/* Symbol table indices are found in the hash buckets and chain table + of a symbol hash table section. This special index value indicates + the end of a chain, meaning no further symbols are found in that bucket. */ + +#define STN_UNDEF 0 /* End of a chain. */ + + /* Relocation table entry without addend (in section of type SHT_REL). */ typedef struct |