123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191 |
- /* Copyright (C) 2003, 2004 Red Hat, Inc.
- * Contributed by Alexandre Oliva <aoliva@redhat.com>
- * Based on ../i386/dl-sysdep.h
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- /*
- * Various assembly language/system dependent hacks that are required
- * so that we can minimize the amount of platform specific code.
- */
- /*
- * Define this if the system uses RELOCA.
- */
- #undef ELF_USES_RELOCA
- /* JMPREL relocs are inside the DT_RELA table. */
- #define ELF_MACHINE_PLTREL_OVERLAP
- #define DL_NO_COPY_RELOCS
- /*
- * Initialization sequence for a GOT. Copy the resolver function
- * descriptor and the pointer to the elf_resolve/link_map data
- * structure. Initialize the got_value in the module while at that.
- */
- #define INIT_GOT(GOT_BASE,MODULE) \
- { \
- (MODULE)->loadaddr.got_value = (GOT_BASE); \
- GOT_BASE[0] = ((unsigned long *)&_dl_linux_resolve)[0]; \
- GOT_BASE[1] = ((unsigned long *)&_dl_linux_resolve)[1]; \
- GOT_BASE[2] = (unsigned long) MODULE; \
- }
- /* Here we define the magic numbers that this dynamic loader should accept */
- #define MAGIC1 EM_CYGNUS_FRV
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "FR-V"
- struct elf_resolve;
- struct funcdesc_value
- {
- void *entry_point;
- void *got_value;
- } __attribute__((__aligned__(8)));
- extern int _dl_linux_resolve(void) __attribute__((__visibility__("hidden")));
- /* 16KiB page alignment. Should perhaps be made dynamic using
- getpagesize(), based on AT_PAGESZ from auxvt? */
- #define PAGE_ALIGN 0xffffc000
- #define ADDR_ALIGN 0x3fff
- #define OFFS_ALIGN 0x7fffc000
- struct funcdesc_ht;
- /* We must force strings used early in the bootstrap into the data
- segment, such that they are referenced with GOTOFF instead of
- GPREL, because GPREL needs the GOT to have already been
- relocated. */
- #undef SEND_EARLY_STDERR
- #define SEND_EARLY_STDERR(S) \
- do { static char __s[] = (S); SEND_STDERR (__s); } while (0)
- #define DL_LOADADDR_TYPE struct elf32_fdpic_loadaddr
- #define DL_RELOC_ADDR(ADDR, LOADADDR) \
- (__reloc_pointer ((void*)(ADDR), (LOADADDR).map))
- #define DL_ADDR_TO_FUNC_PTR(ADDR, LOADADDR) \
- ((void(*)(void)) _dl_funcdesc_for ((void*)(ADDR), (LOADADDR).got_value))
- #define _dl_stabilize_funcdesc(val) \
- ({ __asm__ ("" : "+m" (*(val))); (val); })
- #define DL_CALL_FUNC_AT_ADDR(ADDR, LOADADDR, SIGNATURE, ...) \
- ({ struct funcdesc_value fd = { (void*)(ADDR), (LOADADDR).got_value }; \
- void (*pf)(void) = (void*) _dl_stabilize_funcdesc (&fd); \
- (* SIGNATURE pf)(__VA_ARGS__); })
- #define DL_INIT_LOADADDR_BOOT(LOADADDR, BASEADDR) \
- (__dl_init_loadaddr_map (&(LOADADDR), dl_boot_got_pointer, \
- dl_boot_ldsomap ?: dl_boot_progmap))
- #define DL_INIT_LOADADDR_PROG(LOADADDR, BASEADDR) \
- (__dl_init_loadaddr_map (&(LOADADDR), 0, dl_boot_progmap))
- #define DL_INIT_LOADADDR_EXTRA_DECLS \
- int dl_init_loadaddr_load_count;
- #define DL_INIT_LOADADDR(LOADADDR, BASEADDR, PHDR, PHDRCNT) \
- (dl_init_loadaddr_load_count = \
- __dl_init_loadaddr (&(LOADADDR), (PHDR), (PHDRCNT)))
- #define DL_INIT_LOADADDR_HDR(LOADADDR, ADDR, PHDR) \
- (__dl_init_loadaddr_hdr ((LOADADDR), (ADDR), (PHDR), \
- dl_init_loadaddr_load_count))
- #define DL_LOADADDR_UNMAP(LOADADDR, LEN) \
- (__dl_loadaddr_unmap ((LOADADDR), (NULL)))
- #define DL_LIB_UNMAP(LIB, LEN) \
- (__dl_loadaddr_unmap ((LIB)->loadaddr, (LIB)->funcdesc_ht))
- #define DL_LOADADDR_BASE(LOADADDR) \
- ((LOADADDR).got_value)
- /* This is called from dladdr(), such that we map a function
- descriptor's address to the function's entry point before trying to
- find in which library it's defined. */
- #define DL_LOOKUP_ADDRESS(ADDRESS) (_dl_lookup_address (ADDRESS))
- #define DL_ADDR_IN_LOADADDR(ADDR, TPNT, TFROM) \
- (! (TFROM) && __dl_addr_in_loadaddr ((void*)(ADDR), (TPNT)->loadaddr))
- /* Make sure we only load libraries that use the same number of
- general-purpose and floating-point registers the dynamic loader was
- compiled for. */
- #define DL_CHECK_REG_COUNT(flags) \
- (((flags & EF_FRV_GPR_MASK) == EF_FRV_GPR_32 ? __FRV_GPR__ == 32 : 1) \
- && ((flags & EF_FRV_GPR_MASK) == EF_FRV_GPR_64 ? __FRV_GPR__ == 64 : 1) \
- && ((flags & EF_FRV_FPR_MASK) == EF_FRV_FPR_32 ? __FRV_FPR__ == 32 : 1) \
- && ((flags & EF_FRV_FPR_MASK) == EF_FRV_FPR_64 ? __FRV_FPR__ == 64 : 1) \
- && ((flags & EF_FRV_FPR_MASK) == EF_FRV_FPR_NONE ? __FRV_FPR__ == 0 : 1))
- /* We only support loading FDPIC independently-relocatable shared
- libraries. It probably wouldn't be too hard to support loading
- shared libraries that require relocation by the same amount, but we
- don't know that they exist or would be useful, and the dynamic
- loader code could leak the whole-library map unless we keeping a
- bit more state for DL_LOADADDR_UNMAP and DL_LIB_UNMAP, so let's
- keep things simple for now. */
- #define DL_CHECK_LIB_TYPE(epnt, piclib, _dl_progname, libname) \
- do \
- { \
- if (((epnt)->e_flags & EF_FRV_FDPIC) && ! ((epnt)->e_flags & EF_FRV_PIC)) \
- (piclib) = 2; \
- else \
- { \
- _dl_internal_error_number = LD_ERROR_NOTDYN; \
- _dl_dprintf(2, "%s: '%s' is not an FDPIC shared library" \
- "\n", (_dl_progname), (libname)); \
- _dl_close(infile); \
- return NULL; \
- } \
- \
- if (! DL_CHECK_REG_COUNT ((epnt)->e_flags)) \
- { \
- _dl_internal_error_number = LD_ERROR_NOTDYN; \
- _dl_dprintf(2, "%s: '%s' assumes different register counts" \
- "\n", (_dl_progname), (libname)); \
- _dl_close(infile); \
- } \
- } \
- while (0)
- /* We want want to apply all relocations in the interpreter during
- bootstrap. Because of this, we have to skip the interpreter
- relocations in _dl_parse_relocation_information(), see
- elfinterp.c. */
- #define DL_SKIP_BOOTSTRAP_RELOC(SYMTAB, INDEX, STRTAB) 0
- #ifdef __NR_pread
- #define _DL_PREAD(FD, BUF, SIZE, OFFSET) \
- (_dl_pread((FD), (BUF), (SIZE), (OFFSET)))
- #endif
- /* We want to return to dlsym() a function descriptor if the symbol
- turns out to be a function. */
- #define DL_FIND_HASH_VALUE(TPNT, TYPE_CLASS, SYM) \
- (((TYPE_CLASS) & ELF_RTYPE_CLASS_DLSYM) \
- && ELF32_ST_TYPE((SYM)->st_info) == STT_FUNC \
- ? _dl_funcdesc_for (DL_RELOC_ADDR ((SYM)->st_value, (TPNT)->loadaddr), \
- (TPNT)->loadaddr.got_value) \
- : DL_RELOC_ADDR ((SYM)->st_value, (TPNT)->loadaddr))
- #define DL_GET_READY_TO_RUN_EXTRA_PARMS \
- , struct elf32_fdpic_loadmap *dl_boot_progmap
- #define DL_GET_READY_TO_RUN_EXTRA_ARGS \
- , dl_boot_progmap
-
- #ifdef __USE_GNU
- # include <link.h>
- #else
- # define __USE_GNU
- # include <link.h>
- # undef __USE_GNU
- #endif
|