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Diffstat (limited to 'sys/arch/pmax/include/link.h')
| -rw-r--r-- | sys/arch/pmax/include/link.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/sys/arch/pmax/include/link.h b/sys/arch/pmax/include/link.h new file mode 100644 index 00000000000..4affb777e59 --- /dev/null +++ b/sys/arch/pmax/include/link.h @@ -0,0 +1,125 @@ +/* $OpenBSD: link.h,v 1.1 1997/01/13 10:31:59 graichen Exp $ */ + +/* + * Copyright (c) 1996 Per Fogelstrom + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed under OpenBSD by + * Per Fogelstrom. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#ifndef _LINK_H +#define _LINK_H 1 + +#include <elf_abi.h> +#include <machine/elf_abi.h> + +/* + * Debug rendezvous struct. Pointer to this is set up in the + * target code pointed by the DT_MIPS_RLD_MAP tag. If it is + * defined. + */ + +struct r_debug { + int r_version; /* Protocol version. */ + struct link_map *r_map; /* Head of list of loaded objects. */ + + /* This is the address of a function internal to the run-time linker, + that will always be called when the linker begins to map in a + library or unmap it, and again when the mapping change is complete. + The debugger can set a breakpoint at this address if it wants to + notice shared object mapping changes. */ + Elf32_Addr r_brk; + enum { + /* This state value describes the mapping change taking place when + the `r_brk' address is called. */ + RT_CONSISTENT, /* Mapping change is complete. */ + RT_ADD, /* Adding a new object. */ + RT_DELETE, /* Removing an object mapping. */ + } r_state; + + Elf32_Addr r_ldbase; /* Base address the linker is loaded at. */ + }; + +/* This symbol refers to the "dynamic structure" in the `.dynamic' section + of whatever module refers to `_DYNAMIC'. So, to find its own + `struct r_debug', a program could do: + for (dyn = _DYNAMIC; dyn->d_tag != DT_NULL) + if (dyn->d_tag == DT_MIPS_RLD_MAP) r_debug = (struct r_debug) dyn->d_un.d_ptr; + */ + +extern Elf32_Dyn _DYNAMIC[]; + + +/* Structure describing a loaded shared object. The `l_next' and `l_prev' + members form a chain of all the shared objects loaded at startup. + + These data structures exist in space used by the run-time dynamic linker; + modifying them may have disastrous results. */ + +struct link_map + { + /* These first few members are part of the protocol with the debugger. + This is the same format used in SVR4. */ + + Elf32_Addr l_addr; /* Base address shared object is loaded at. */ + Elf32_Addr l_offs; /* Offset */ + char *l_name; /* Absolute file name object was found in. */ + Elf32_Dyn *l_ld; /* Dynamic section of the shared object. */ + struct link_map *l_next, *l_prev; /* Chain of loaded objects. */ + + /* All following members are internal to the dynamic linker. + They may change without notice. */ + + const char *l_libname; /* Name requested (before search). */ + + /* Indexed pointers to dynamic section. */ + Elf32_Dyn *l_info[DT_NUM + DT_PROCNUM]; + + const Elf32_Phdr *l_phdr; /* Pointer to program header table in core. */ + Elf32_Word l_phnum; /* Number of program header entries. */ + Elf32_Addr l_entry; /* Entry point location. */ + + /* Symbol hash table. */ + Elf32_Word l_nbuckets; + const Elf32_Word *l_buckets, *l_chain; + + unsigned int l_opencount; /* Reference count for dlopen/dlclose. */ + enum /* Where this object came from. */ + { + lt_executable, /* The main executable program. */ + lt_interpreter, /* The interpreter: the dynamic linker. */ + lt_library, /* Library needed by main executable. */ + lt_loaded, /* Extra run-time loaded shared object. */ + } l_type:2; + unsigned int l_deps_loaded:1; /* Nonzero if DT_NEEDED items loaded. */ + unsigned int l_relocated:1; /* Nonzero if object's relocations done. */ + unsigned int l_init_called:1; /* Nonzero if DT_INIT function called. */ + unsigned int l_init_running:1; /* Nonzero while DT_INIT function runs. */ + }; + +#endif /* _LINK_H */ |