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author | cvs2svn <> | 2011-12-08 20:47:29 +0000 |
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committer | cvs2svn <> | 2011-12-08 20:47:29 +0000 |
commit | 043beeed5375bcc7982af475b1d599e475f0467a (patch) | |
tree | e4a3f7b6abc9819aaf88a8bb5ff54698f7d15200 /include/aout/sun4.h | |
parent | ad0835bc5e9652f42535584b12137a955ac68789 (diff) | |
download | cygnal-cgen-snapshot-20111201.tar.gz cygnal-cgen-snapshot-20111201.tar.bz2 cygnal-cgen-snapshot-20111201.zip |
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Sprout from gdb_7_4-branch 2011-12-08 20:47:28 UTC cvs2svn 'This commit was manufactured by cvs2svn to create branch 'gdb_7_4-branch'.'
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include/COPYING
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include/ChangeLog
include/ChangeLog-9103
include/MAINTAINERS
include/alloca-conf.h
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include/aout/adobe.h
include/aout/aout64.h
include/aout/ar.h
include/aout/dynix3.h
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include/aout/host.h
include/aout/hp.h
include/aout/hp300hpux.h
include/aout/hppa.h
include/aout/ranlib.h
include/aout/reloc.h
include/aout/stab.def
include/aout/stab_gnu.h
include/aout/sun4.h
include/bfdlink.h
include/binary-io.h
include/bout.h
include/cgen/ChangeLog
include/cgen/basic-modes.h
include/cgen/basic-ops.h
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include/coff/ChangeLog
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include/simple-object.h
include/som/ChangeLog
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include/som/clock.h
include/som/internal.h
include/som/lst.h
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Diffstat (limited to 'include/aout/sun4.h')
-rw-r--r-- | include/aout/sun4.h | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/include/aout/sun4.h b/include/aout/sun4.h deleted file mode 100644 index 06f7584cf..000000000 --- a/include/aout/sun4.h +++ /dev/null @@ -1,239 +0,0 @@ -/* SPARC-specific values for a.out files - - Copyright 2001, 2009, 2010 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, - MA 02110-1301, USA. */ - -/* Some systems, e.g., AIX, may have defined this in header files already - included. */ -#undef TARGET_PAGE_SIZE -#define TARGET_PAGE_SIZE 0x2000 /* 8K. aka NBPG in <sys/param.h> */ -/* Note that some SPARCs have 4K pages, some 8K, some others. */ - -#define SEG_SIZE_SPARC TARGET_PAGE_SIZE -#define SEG_SIZE_SUN3 0x20000 /* Resolution of r/w protection hw */ - -#define TEXT_START_ADDR TARGET_PAGE_SIZE /* Location 0 is not accessible */ -#define N_HEADER_IN_TEXT(x) 1 - -/* Non-default definitions of the accessor macros... */ - -/* Segment size varies on Sun-3 versus Sun-4. */ - -#define N_SEGSIZE(x) (N_MACHTYPE(x) == M_SPARC? SEG_SIZE_SPARC: \ - N_MACHTYPE(x) == M_68020? SEG_SIZE_SUN3: \ - /* Guess? */ TARGET_PAGE_SIZE) - -/* Virtual Address of text segment from the a.out file. For OMAGIC, - (almost always "unlinked .o's" these days), should be zero. - Sun added a kludge so that shared libraries linked ZMAGIC get - an address of zero if a_entry (!!!) is lower than the otherwise - expected text address. These kludges have gotta go! - For linked files, should reflect reality if we know it. */ - -#define N_SHARED_LIB(x) ((x).a_entry < TEXT_START_ADDR \ - && (x).a_text >= EXEC_BYTES_SIZE) - -/* This differs from the version in aout64.h (which we override by defining - it here) only for NMAGIC (we return TEXT_START_ADDR+EXEC_BYTES_SIZE; - they return 0). */ - -#define N_TXTADDR(x) \ - (N_MAGIC(x)==OMAGIC? 0 \ - : (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \ - : TEXT_START_ADDR+EXEC_BYTES_SIZE) - -/* When a file is linked against a shared library on SunOS 4, the - dynamic bit in the exec header is set, and the first symbol in the - symbol table is __DYNAMIC. Its value is the address of the - following structure. */ - -struct external_sun4_dynamic -{ - /* The version number of the structure. SunOS 4.1.x creates files - with version number 3, which is what this structure is based on. - According to gdb, version 2 is similar. I believe that version 2 - used a different type of procedure linkage table, and there may - have been other differences. */ - bfd_byte ld_version[4]; - /* The virtual address of a 28 byte structure used in debugging. - The contents are filled in at run time by ld.so. */ - bfd_byte ldd[4]; - /* The virtual address of another structure with information about - how to relocate the executable at run time. */ - bfd_byte ld[4]; -}; - -/* The size of the debugging structure pointed to by the debugger - field of __DYNAMIC. */ -#define EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE (24) - -/* The structure pointed to by the linker field of __DYNAMIC. As far - as I can tell, most of the addresses in this structure are offsets - within the file, but some are actually virtual addresses. */ - -struct internal_sun4_dynamic_link -{ - /* Linked list of loaded objects. This is filled in at runtime by - ld.so and probably by dlopen. */ - unsigned long ld_loaded; - - /* The address of the list of names of shared objects which must be - included at runtime. Each entry in the list is 16 bytes: the 4 - byte address of the string naming the object (e.g., for -lc this - is "c"); 4 bytes of flags--the high bit is whether to search for - the object using the library path; the 2 byte major version - number; the 2 byte minor version number; the 4 byte address of - the next entry in the list (zero if this is the last entry). The - version numbers seem to only be non-zero when doing library - searching. */ - unsigned long ld_need; - - /* The address of the path to search for the shared objects which - must be included. This points to a string in PATH format which - is generated from the -L arguments to the linker. According to - the man page, ld.so implicitly adds ${LD_LIBRARY_PATH} to the - beginning of this string and /lib:/usr/lib:/usr/local/lib to the - end. The string is terminated by a null byte. This field is - zero if there is no additional path. */ - unsigned long ld_rules; - - /* The address of the global offset table. This appears to be a - virtual address, not a file offset. The first entry in the - global offset table seems to be the virtual address of the - sun4_dynamic structure (the same value as the __DYNAMIC symbol). - The global offset table is used for PIC code to hold the - addresses of variables. A dynamically linked file which does not - itself contain PIC code has a four byte global offset table. */ - unsigned long ld_got; - - /* The address of the procedure linkage table. This appears to be a - virtual address, not a file offset. - - On a SPARC, the table is composed of 12 byte entries, each of - which consists of three instructions. The first entry is - sethi %hi(0),%g1 - jmp %g1 - nop - These instructions are changed by ld.so into a jump directly into - ld.so itself. Each subsequent entry is - save %sp, -96, %sp - call <address of first entry in procedure linkage table> - <reloc_number | 0x01000000> - The reloc_number is the number of the reloc to use to resolve - this entry. The reloc will be a JMP_SLOT reloc against some - symbol that is not defined in this object file but should be - defined in a shared object (if it is not, ld.so will report a - runtime error and exit). The constant 0x010000000 turns the - reloc number into a sethi of %g0, which does nothing since %g0 is - hardwired to zero. - - When one of these entries is executed, it winds up calling into - ld.so. ld.so looks at the reloc number, available via the return - address, to determine which entry this is. It then looks at the - reloc and patches up the entry in the table into a sethi and jmp - to the real address followed by a nop. This means that the reloc - lookup only has to happen once, and it also means that the - relocation only needs to be done if the function is actually - called. The relocation is expensive because ld.so must look up - the symbol by name. - - The size of the procedure linkage table is given by the ld_plt_sz - field. */ - unsigned long ld_plt; - - /* The address of the relocs. These are in the same format as - ordinary relocs. Symbol index numbers refer to the symbols - pointed to by ld_stab. I think the only way to determine the - number of relocs is to assume that all the bytes from ld_rel to - ld_hash contain reloc entries. */ - unsigned long ld_rel; - - /* The address of a hash table of symbols. The hash table has - roughly the same number of entries as there are dynamic symbols; - I think the only way to get the exact size is to assume that - every byte from ld_hash to ld_stab is devoted to the hash table. - - Each entry in the hash table is eight bytes. The first four - bytes are a symbol index into the dynamic symbols. The second - four bytes are the index of the next hash table entry in the - bucket. The ld_buckets field gives the number of buckets, say B. - The first B entries in the hash table each start a bucket which - is chained through the second four bytes of each entry. A value - of zero ends the chain. - - The hash function is simply - h = 0; - while (*string != '\0') - h = (h << 1) + *string++; - h &= 0x7fffffff; - - To look up a symbol, compute the hash value of the name. Take - the modulos of hash value and the number of buckets. Start at - that entry in the hash table. See if the symbol (from the first - four bytes of the hash table entry) has the name you are looking - for. If not, use the chain field (the second four bytes of the - hash table entry) to move on to the next entry in this bucket. - If the chain field is zero you have reached the end of the - bucket, and the symbol is not in the hash table. */ - unsigned long ld_hash; - - /* The address of the symbol table. This is a list of - external_nlist structures. The string indices are relative to - the ld_symbols field. I think the only way to determine the - number of symbols is to assume that all the bytes between ld_stab - and ld_symbols are external_nlist structures. */ - unsigned long ld_stab; - - /* I don't know what this is for. It seems to always be zero. */ - unsigned long ld_stab_hash; - - /* The number of buckets in the hash table. */ - unsigned long ld_buckets; - - /* The address of the symbol string table. The first string in this - string table need not be the empty string. */ - unsigned long ld_symbols; - - /* The size in bytes of the symbol string table. */ - unsigned long ld_symb_size; - - /* The size in bytes of the text segment. */ - unsigned long ld_text; - - /* The size in bytes of the procedure linkage table. */ - unsigned long ld_plt_sz; -}; - -/* The external form of the structure. */ - -struct external_sun4_dynamic_link -{ - bfd_byte ld_loaded[4]; - bfd_byte ld_need[4]; - bfd_byte ld_rules[4]; - bfd_byte ld_got[4]; - bfd_byte ld_plt[4]; - bfd_byte ld_rel[4]; - bfd_byte ld_hash[4]; - bfd_byte ld_stab[4]; - bfd_byte ld_stab_hash[4]; - bfd_byte ld_buckets[4]; - bfd_byte ld_symbols[4]; - bfd_byte ld_symb_size[4]; - bfd_byte ld_text[4]; - bfd_byte ld_plt_sz[4]; -}; |