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/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2000-2006 by Erik Andersen <andersen@codepoet.org>
*
* GNU Lesser General Public License version 2.1 or later.
*/
#ifndef _LD_DEFS_H
#define _LD_DEFS_H
#define FLAG_ANY -1
#define FLAG_TYPE_MASK 0x00ff
#define FLAG_LIBC4 0x0000
#define FLAG_ELF 0x0001
#define FLAG_ELF_LIBC5 0x0002
#define FLAG_ELF_LIBC6 0x0003
#define FLAG_ELF_UCLIBC 0x0004
#define FLAG_REQUIRED_MASK 0xff00
#define FLAG_SPARC_LIB64 0x0100
#define FLAG_IA64_LIB64 0x0200
#define FLAG_X8664_LIB64 0x0300
#define FLAG_S390_LIB64 0x0400
#define FLAG_POWERPC_LIB64 0x0500
#define FLAG_MIPS64_LIBN32 0x0600
#define FLAG_MIPS64_LIBN64 0x0700
#define LIB_ANY -1
#define LIB_DLL 0
#define LIB_ELF 1
#define LIB_ELF64 0x80
#define LIB_ELF_LIBC5 2
#define LIB_ELF_LIBC6 3
#define LIB_ELF_LIBC0 4
#if defined(__LDSO_PRELOAD_FILE_SUPPORT__) || defined(__LDSO_CACHE_SUPPORT__)
#ifndef __LDSO_BASE_FILENAME__
#define __LDSO_BASE_FILENAME__ "ld.so"
#endif
#define LDSO_BASE_PATH UCLIBC_RUNTIME_PREFIX "etc/" __LDSO_BASE_FILENAME__
#ifdef __LDSO_PRELOAD_FILE_SUPPORT__
#define LDSO_PRELOAD LDSO_BASE_PATH ".preload"
#endif
#ifdef __LDSO_CACHE_SUPPORT__
#define LDSO_CONF LDSO_BASE_PATH ".conf"
#define LDSO_CACHE LDSO_BASE_PATH ".cache"
#define LDSO_CACHE_MAGIC "ld.so-"
#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
#define LDSO_CACHE_VER "1.7.0"
#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
typedef struct {
char magic [LDSO_CACHE_MAGIC_LEN];
char version [LDSO_CACHE_VER_LEN];
int nlibs;
} header_t;
typedef struct {
int flags;
int sooffset;
int liboffset;
} libentry_t;
#endif /* __LDSO_CACHE_SUPPORT__ */
#endif
/* Provide a means for a port to pass additional arguments to the _dl_start
function. */
#ifndef DL_START
# define DL_START(X) static void * __attribute_used__ _dl_start(X)
#endif
/* Machines in which different sections may be relocated by different
* amounts should define this and LD_RELOC_ADDR. If you change this,
* make sure you change struct link_map in include/link.h accordingly
* such that it matches a prefix of struct elf_resolve.
*/
#ifndef DL_LOADADDR_TYPE
# define DL_LOADADDR_TYPE ElfW(Addr)
#endif
/* When DL_LOADADDR_TYPE is not a scalar value, or some different
* computation is needed to relocate an address, define this.
*/
#ifndef DL_RELOC_ADDR
# define DL_RELOC_ADDR(LOADADDR, ADDR) \
((LOADADDR) + (ADDR))
#endif
/* Initialize a LOADADDR representing the loader itself. It's only
* called from DL_BOOT, so additional arguments passed to it may be
* referenced.
*/
#ifndef DL_INIT_LOADADDR_BOOT
# define DL_INIT_LOADADDR_BOOT(LOADADDR, BASEADDR) \
((LOADADDR) = (BASEADDR))
#endif
/* Define if any declarations/definitions of local variables are
* needed in a function that calls DT_INIT_LOADADDR or
* DL_INIT_LOADADDR_HDR. Declarations must be properly terminated
* with a semicolon, and non-declaration statements are forbidden.
*/
#ifndef DL_INIT_LOADADDR_EXTRA_DECLS
# define DL_INIT_LOADADDR_EXTRA_DECLS /* int i; */
#endif
/* Prepare a DL_LOADADDR_TYPE data structure for incremental
* initialization with DL_INIT_LOADADDR_HDR, given pointers to a base
* load address and to program headers.
*/
#ifndef DL_INIT_LOADADDR
# define DL_INIT_LOADADDR(LOADADDR, BASEADDR, PHDR, PHDRCNT) \
((LOADADDR) = (BASEADDR))
#endif
/* Initialize a LOADADDR representing the program. It's called from
* DL_BOOT only.
*/
#ifndef DL_INIT_LOADADDR_PROG
# define DL_INIT_LOADADDR_PROG(LOADADDR, BASEADDR) \
((LOADADDR) = (DL_LOADADDR_TYPE)(BASEADDR))
#endif
/* Convert a DL_LOADADDR_TYPE to an identifying pointer. Used mostly
* for debugging.
*/
#ifndef DL_LOADADDR_BASE
# define DL_LOADADDR_BASE(LOADADDR) (LOADADDR)
#endif
/* Test whether a given ADDR is more likely to be within the memory
* region mapped to TPNT (a struct elf_resolve *) than to TFROM.
* Everywhere that this is used, TFROM is initially NULL, and whenever
* a potential match is found, it's updated. One might want to walk
* the chain of elf_resolve to locate the best match and return false
* whenever TFROM is non-NULL, or use an exact-matching algorithm
* using additional information encoded in DL_LOADADDR_TYPE to test
* for exact containment.
*/
#ifndef DL_ADDR_IN_LOADADDR
# define DL_ADDR_IN_LOADADDR(ADDR, TPNT, TFROM) \
((void*)(TPNT)->loadaddr < (void*)(ADDR) \
&& (!(TFROM) || (TFROM)->loadaddr < (TPNT)->loadaddr))
#endif
/* Use this macro to convert a pointer to a function's entry point to
* a pointer to function. The pointer is assumed to have already been
* relocated. LOADADDR is passed because it may contain additional
* information needed to compute the pointer to function.
*/
#ifndef DL_ADDR_TO_FUNC_PTR
# define DL_ADDR_TO_FUNC_PTR(ADDR, LOADADDR) ((void(*)(void))(ADDR))
#endif
/* On some platforms, computing a pointer to function is more
expensive than calling a function at a given address, so this
alternative is provided. The function signature must be given
within parentheses, as in a type cast. */
#ifndef DL_CALL_FUNC_AT_ADDR
# define DL_CALL_FUNC_AT_ADDR(ADDR, LOADADDR, SIGNATURE, ...) \
((*SIGNATURE DL_ADDR_TO_FUNC_PTR ((ADDR), (LOADADDR)))(__VA_ARGS__))
#endif
#endif /* _LD_DEFS_H */
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