diff options
Diffstat (limited to 'bfd/libbfd.c')
| -rw-r--r-- | bfd/libbfd.c | 1263 |
1 files changed, 1263 insertions, 0 deletions
diff --git a/bfd/libbfd.c b/bfd/libbfd.c new file mode 100644 index 00000000000..8abd1f58f1c --- /dev/null +++ b/bfd/libbfd.c @@ -0,0 +1,1263 @@ +/* Assorted BFD support routines, only used internally. + Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 1998 + Free Software Foundation, Inc. + Written by Cygnus Support. + +This file is part of BFD, the Binary File Descriptor library. + +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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" + +#ifndef HAVE_GETPAGESIZE +#define getpagesize() 2048 +#endif + +static int real_read PARAMS ((PTR, size_t, size_t, FILE *)); + +/* +SECTION + Internal functions + +DESCRIPTION + These routines are used within BFD. + They are not intended for export, but are documented here for + completeness. +*/ + +/* A routine which is used in target vectors for unsupported + operations. */ + +/*ARGSUSED*/ +boolean +bfd_false (ignore) + bfd *ignore; +{ + bfd_set_error (bfd_error_invalid_operation); + return false; +} + +/* A routine which is used in target vectors for supported operations + which do not actually do anything. */ + +/*ARGSUSED*/ +boolean +bfd_true (ignore) + bfd *ignore; +{ + return true; +} + +/* A routine which is used in target vectors for unsupported + operations which return a pointer value. */ + +/*ARGSUSED*/ +PTR +bfd_nullvoidptr (ignore) + bfd *ignore; +{ + bfd_set_error (bfd_error_invalid_operation); + return NULL; +} + +/*ARGSUSED*/ +int +bfd_0 (ignore) + bfd *ignore; +{ + return 0; +} + +/*ARGSUSED*/ +unsigned int +bfd_0u (ignore) + bfd *ignore; +{ + return 0; +} + +/*ARGUSED*/ +long +bfd_0l (ignore) + bfd *ignore; +{ + return 0; +} + +/* A routine which is used in target vectors for unsupported + operations which return -1 on error. */ + +/*ARGSUSED*/ +long +_bfd_n1 (ignore_abfd) + bfd *ignore_abfd; +{ + bfd_set_error (bfd_error_invalid_operation); + return -1; +} + +/*ARGSUSED*/ +void +bfd_void (ignore) + bfd *ignore; +{ +} + +/*ARGSUSED*/ +boolean +_bfd_nocore_core_file_matches_executable_p (ignore_core_bfd, ignore_exec_bfd) + bfd *ignore_core_bfd; + bfd *ignore_exec_bfd; +{ + bfd_set_error (bfd_error_invalid_operation); + return false; +} + +/* Routine to handle core_file_failing_command entry point for targets + without core file support. */ + +/*ARGSUSED*/ +char * +_bfd_nocore_core_file_failing_command (ignore_abfd) + bfd *ignore_abfd; +{ + bfd_set_error (bfd_error_invalid_operation); + return (char *)NULL; +} + +/* Routine to handle core_file_failing_signal entry point for targets + without core file support. */ + +/*ARGSUSED*/ +int +_bfd_nocore_core_file_failing_signal (ignore_abfd) + bfd *ignore_abfd; +{ + bfd_set_error (bfd_error_invalid_operation); + return 0; +} + +/*ARGSUSED*/ +const bfd_target * +_bfd_dummy_target (ignore_abfd) + bfd *ignore_abfd; +{ + bfd_set_error (bfd_error_wrong_format); + return 0; +} + +/* Allocate memory using malloc. */ + +PTR +bfd_malloc (size) + size_t size; +{ + PTR ptr; + + ptr = (PTR) malloc (size); + if (ptr == NULL && size != 0) + bfd_set_error (bfd_error_no_memory); + return ptr; +} + +/* Reallocate memory using realloc. */ + +PTR +bfd_realloc (ptr, size) + PTR ptr; + size_t size; +{ + PTR ret; + + if (ptr == NULL) + ret = malloc (size); + else + ret = realloc (ptr, size); + + if (ret == NULL) + bfd_set_error (bfd_error_no_memory); + + return ret; +} + +/* Allocate memory using malloc and clear it. */ + +PTR +bfd_zmalloc (size) + size_t size; +{ + PTR ptr; + + ptr = (PTR) malloc (size); + + if (size != 0) + { + if (ptr == NULL) + bfd_set_error (bfd_error_no_memory); + else + memset (ptr, 0, size); + } + + return ptr; +} + +/* Some IO code */ + + +/* Note that archive entries don't have streams; they share their parent's. + This allows someone to play with the iostream behind BFD's back. + + Also, note that the origin pointer points to the beginning of a file's + contents (0 for non-archive elements). For archive entries this is the + first octet in the file, NOT the beginning of the archive header. */ + +static int +real_read (where, a,b, file) + PTR where; + size_t a; + size_t b; + FILE *file; +{ + /* FIXME - this looks like an optimization, but it's really to cover + up for a feature of some OSs (not solaris - sigh) that + ld/pe-dll.c takes advantage of (apparently) when it creates BFDs + internally and tries to link against them. BFD seems to be smart + enough to realize there are no symbol records in the "file" that + doesn't exist but attempts to read them anyway. On Solaris, + attempting to read zero bytes from a NULL file results in a core + dump, but on other platforms it just returns zero bytes read. + This makes it to something reasonable. - DJ */ + if (a == 0 || b == 0) + return 0; + +#if defined (__VAX) && defined (VMS) + /* Apparently fread on Vax VMS does not keep the record length + information. */ + return read (fileno (file), where, a * b); +#else + return fread (where, a, b, file); +#endif +} + +/* Return value is amount read (FIXME: how are errors and end of file dealt + with? We never call bfd_set_error, which is probably a mistake). */ + +bfd_size_type +bfd_read (ptr, size, nitems, abfd) + PTR ptr; + bfd_size_type size; + bfd_size_type nitems; + bfd *abfd; +{ + int nread; + + if ((abfd->flags & BFD_IN_MEMORY) != 0) + { + struct bfd_in_memory *bim; + bfd_size_type get; + + bim = (struct bfd_in_memory *) abfd->iostream; + get = size * nitems; + if (abfd->where + get > bim->size) + { + get = bim->size - abfd->where; + bfd_set_error (bfd_error_file_truncated); + } + memcpy (ptr, bim->buffer + abfd->where, get); + abfd->where += get; + return get; + } + + nread = real_read (ptr, 1, (size_t)(size*nitems), bfd_cache_lookup(abfd)); + if (nread > 0) + abfd->where += nread; + + /* Set bfd_error if we did not read as much data as we expected. + + If the read failed due to an error set the bfd_error_system_call, + else set bfd_error_file_truncated. + + A BFD backend may wish to override bfd_error_file_truncated to + provide something more useful (eg. no_symbols or wrong_format). */ + if (nread < (int)(size * nitems)) + { + if (ferror (bfd_cache_lookup (abfd))) + bfd_set_error (bfd_error_system_call); + else + bfd_set_error (bfd_error_file_truncated); + } + + return nread; +} + +/* The window support stuff should probably be broken out into + another file.... */ +/* The idea behind the next and refcount fields is that one mapped + region can suffice for multiple read-only windows or multiple + non-overlapping read-write windows. It's not implemented yet + though. */ +struct _bfd_window_internal { + struct _bfd_window_internal *next; + PTR data; + bfd_size_type size; + int refcount : 31; /* should be enough... */ + unsigned mapped : 1; /* 1 = mmap, 0 = malloc */ +}; + +void +bfd_init_window (windowp) + bfd_window *windowp; +{ + windowp->data = 0; + windowp->i = 0; + windowp->size = 0; +} + +/* Currently, if USE_MMAP is undefined, none if the window stuff is + used. Okay, so it's mis-named. At least the command-line option + "--without-mmap" is more obvious than "--without-windows" or some + such. */ +#ifdef USE_MMAP + +#undef HAVE_MPROTECT /* code's not tested yet */ + +#if HAVE_MMAP || HAVE_MPROTECT || HAVE_MADVISE +#include <sys/mman.h> +#endif + +#ifndef MAP_FILE +#define MAP_FILE 0 +#endif + +static int debug_windows; + +void +bfd_free_window (windowp) + bfd_window *windowp; +{ + bfd_window_internal *i = windowp->i; + windowp->i = 0; + windowp->data = 0; + if (i == 0) + return; + i->refcount--; + if (debug_windows) + fprintf (stderr, "freeing window @%p<%p,%lx,%p>\n", + windowp, windowp->data, windowp->size, windowp->i); + if (i->refcount != 0) + return; + + if (i->mapped) + { +#ifdef HAVE_MMAP + munmap (i->data, i->size); + goto no_free; +#else + abort (); +#endif + } +#ifdef HAVE_MPROTECT + mprotect (i->data, i->size, PROT_READ | PROT_WRITE); +#endif + free (i->data); +#ifdef HAVE_MMAP + no_free: +#endif + i->data = 0; + /* There should be no more references to i at this point. */ + free (i); +} + +static int ok_to_map = 1; + +boolean +bfd_get_file_window (abfd, offset, size, windowp, writable) + bfd *abfd; + file_ptr offset; + bfd_size_type size; + bfd_window *windowp; + boolean writable; +{ + static size_t pagesize; + bfd_window_internal *i = windowp->i; + size_t size_to_alloc = size; + + if (debug_windows) + fprintf (stderr, "bfd_get_file_window (%p, %6ld, %6ld, %p<%p,%lx,%p>, %d)", + abfd, (long) offset, (long) size, + windowp, windowp->data, (unsigned long) windowp->size, + windowp->i, writable); + + /* Make sure we know the page size, so we can be friendly to mmap. */ + if (pagesize == 0) + pagesize = getpagesize (); + if (pagesize == 0) + abort (); + + if (i == 0) + { + windowp->i = i = (bfd_window_internal *) bfd_zmalloc (sizeof (bfd_window_internal)); + if (i == 0) + return false; + i->data = 0; + } +#ifdef HAVE_MMAP + if (ok_to_map + && (i->data == 0 || i->mapped == 1) + && (abfd->flags & BFD_IN_MEMORY) == 0) + { + file_ptr file_offset, offset2; + size_t real_size; + int fd; + FILE *f; + + /* Find the real file and the real offset into it. */ + while (abfd->my_archive != NULL) + { + offset += abfd->origin; + abfd = abfd->my_archive; + } + f = bfd_cache_lookup (abfd); + fd = fileno (f); + + /* Compute offsets and size for mmap and for the user's data. */ + offset2 = offset % pagesize; + if (offset2 < 0) + abort (); + file_offset = offset - offset2; + real_size = offset + size - file_offset; + real_size = real_size + pagesize - 1; + real_size -= real_size % pagesize; + + /* If we're re-using a memory region, make sure it's big enough. */ + if (i->data && i->size < size) + { + munmap (i->data, i->size); + i->data = 0; + } + i->data = mmap (i->data, real_size, + writable ? PROT_WRITE | PROT_READ : PROT_READ, + (writable + ? MAP_FILE | MAP_PRIVATE + : MAP_FILE | MAP_SHARED), + fd, file_offset); + if (i->data == (PTR) -1) + { + /* An error happened. Report it, or try using malloc, or + something. */ + bfd_set_error (bfd_error_system_call); + i->data = 0; + windowp->data = 0; + if (debug_windows) + fprintf (stderr, "\t\tmmap failed!\n"); + return false; + } + if (debug_windows) + fprintf (stderr, "\n\tmapped %ld at %p, offset is %ld\n", + (long) real_size, i->data, (long) offset2); + i->size = real_size; + windowp->data = (PTR) ((bfd_byte *) i->data + offset2); + windowp->size = size; + i->mapped = 1; + return true; + } + else if (debug_windows) + { + if (ok_to_map) + fprintf (stderr, _("not mapping: data=%lx mapped=%d\n"), + (unsigned long) i->data, (int) i->mapped); + else + fprintf (stderr, _("not mapping: env var not set\n")); + } +#else + ok_to_map = 0; +#endif + +#ifdef HAVE_MPROTECT + if (!writable) + { + size_to_alloc += pagesize - 1; + size_to_alloc -= size_to_alloc % pagesize; + } +#endif + if (debug_windows) + fprintf (stderr, "\n\t%s(%6ld)", + i->data ? "realloc" : " malloc", (long) size_to_alloc); + i->data = (PTR) bfd_realloc (i->data, size_to_alloc); + if (debug_windows) + fprintf (stderr, "\t-> %p\n", i->data); + i->refcount = 1; + if (i->data == NULL) + { + if (size_to_alloc == 0) + return true; + bfd_set_error (bfd_error_no_memory); + return false; + } + if (bfd_seek (abfd, offset, SEEK_SET) != 0) + return false; + i->size = bfd_read (i->data, size, 1, abfd); + if (i->size != size) + return false; + i->mapped = 0; +#ifdef HAVE_MPROTECT + if (!writable) + { + if (debug_windows) + fprintf (stderr, "\tmprotect (%p, %ld, PROT_READ)\n", i->data, + (long) i->size); + mprotect (i->data, i->size, PROT_READ); + } +#endif + windowp->data = i->data; + windowp->size = i->size; + return true; +} + +#endif /* USE_MMAP */ + +bfd_size_type +bfd_write (ptr, size, nitems, abfd) + CONST PTR ptr; + bfd_size_type size; + bfd_size_type nitems; + bfd *abfd; +{ + long nwrote; + + if ((abfd->flags & BFD_IN_MEMORY) != 0) + { + struct bfd_in_memory *bim = (struct bfd_in_memory *) (abfd->iostream); + size *= nitems; + if (abfd->where + size > bim->size) + { + long newsize, oldsize = (bim->size + 127) & ~127; + bim->size = abfd->where + size; + /* Round up to cut down on memory fragmentation */ + newsize = (bim->size + 127) & ~127; + if (newsize > oldsize) + { + bim->buffer = bfd_realloc (bim->buffer, newsize); + if (bim->buffer == 0) + { + bim->size = 0; + return 0; + } + } + } + memcpy (bim->buffer + abfd->where, ptr, size); + abfd->where += size; + return size; + } + + nwrote = fwrite (ptr, 1, (size_t) (size * nitems), + bfd_cache_lookup (abfd)); + if (nwrote > 0) + abfd->where += nwrote; + if ((bfd_size_type) nwrote != size * nitems) + { +#ifdef ENOSPC + if (nwrote >= 0) + errno = ENOSPC; +#endif + bfd_set_error (bfd_error_system_call); + } + return nwrote; +} + +/* +INTERNAL_FUNCTION + bfd_write_bigendian_4byte_int + +SYNOPSIS + void bfd_write_bigendian_4byte_int(bfd *abfd, int i); + +DESCRIPTION + Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big + endian order regardless of what else is going on. This is useful in + archives. + +*/ +void +bfd_write_bigendian_4byte_int (abfd, i) + bfd *abfd; + int i; +{ + bfd_byte buffer[4]; + bfd_putb32(i, buffer); + if (bfd_write((PTR)buffer, 4, 1, abfd) != 4) + abort (); +} + +long +bfd_tell (abfd) + bfd *abfd; +{ + file_ptr ptr; + + if ((abfd->flags & BFD_IN_MEMORY) != 0) + return abfd->where; + + ptr = ftell (bfd_cache_lookup(abfd)); + + if (abfd->my_archive) + ptr -= abfd->origin; + abfd->where = ptr; + return ptr; +} + +int +bfd_flush (abfd) + bfd *abfd; +{ + if ((abfd->flags & BFD_IN_MEMORY) != 0) + return 0; + return fflush (bfd_cache_lookup(abfd)); +} + +/* Returns 0 for success, negative value for failure (in which case + bfd_get_error can retrieve the error code). */ +int +bfd_stat (abfd, statbuf) + bfd *abfd; + struct stat *statbuf; +{ + FILE *f; + int result; + + if ((abfd->flags & BFD_IN_MEMORY) != 0) + abort (); + + f = bfd_cache_lookup (abfd); + if (f == NULL) + { + bfd_set_error (bfd_error_system_call); + return -1; + } + result = fstat (fileno (f), statbuf); + if (result < 0) + bfd_set_error (bfd_error_system_call); + return result; +} + +/* Returns 0 for success, nonzero for failure (in which case bfd_get_error + can retrieve the error code). */ + +int +bfd_seek (abfd, position, direction) + bfd *abfd; + file_ptr position; + int direction; +{ + int result; + FILE *f; + file_ptr file_position; + /* For the time being, a BFD may not seek to it's end. The problem + is that we don't easily have a way to recognize the end of an + element in an archive. */ + + BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR); + + if (direction == SEEK_CUR && position == 0) + return 0; + + if ((abfd->flags & BFD_IN_MEMORY) != 0) + { + if (direction == SEEK_SET) + abfd->where = position; + else + abfd->where += position; + return 0; + } + + if (abfd->format != bfd_archive && abfd->my_archive == 0) + { +#if 0 + /* Explanation for this code: I'm only about 95+% sure that the above + conditions are sufficient and that all i/o calls are properly + adjusting the `where' field. So this is sort of an `assert' + that the `where' field is correct. If we can go a while without + tripping the abort, we can probably safely disable this code, + so that the real optimizations happen. */ + file_ptr where_am_i_now; + where_am_i_now = ftell (bfd_cache_lookup (abfd)); + if (abfd->my_archive) + where_am_i_now -= abfd->origin; + if (where_am_i_now != abfd->where) + abort (); +#endif + if (direction == SEEK_SET && position == abfd->where) + return 0; + } + else + { + /* We need something smarter to optimize access to archives. + Currently, anything inside an archive is read via the file + handle for the archive. Which means that a bfd_seek on one + component affects the `current position' in the archive, as + well as in any other component. + + It might be sufficient to put a spike through the cache + abstraction, and look to the archive for the file position, + but I think we should try for something cleaner. + + In the meantime, no optimization for archives. */ + } + + f = bfd_cache_lookup (abfd); + file_position = position; + if (direction == SEEK_SET && abfd->my_archive != NULL) + file_position += abfd->origin; + + result = fseek (f, file_position, direction); + + if (result != 0) + { + int hold_errno = errno; + + /* Force redetermination of `where' field. */ + bfd_tell (abfd); + + /* An EINVAL error probably means that the file offset was + absurd. */ + if (hold_errno == EINVAL) + bfd_set_error (bfd_error_file_truncated); + else + { + bfd_set_error (bfd_error_system_call); + errno = hold_errno; + } + } + else + { + /* Adjust `where' field. */ + if (direction == SEEK_SET) + abfd->where = position; + else + abfd->where += position; + } + return result; +} + +/** The do-it-yourself (byte) sex-change kit */ + +/* The middle letter e.g. get<b>short indicates Big or Little endian + target machine. It doesn't matter what the byte order of the host + machine is; these routines work for either. */ + +/* FIXME: Should these take a count argument? + Answer (gnu@cygnus.com): No, but perhaps they should be inline + functions in swap.h #ifdef __GNUC__. + Gprof them later and find out. */ + +/* +FUNCTION + bfd_put_size +FUNCTION + bfd_get_size + +DESCRIPTION + These macros as used for reading and writing raw data in + sections; each access (except for bytes) is vectored through + the target format of the BFD and mangled accordingly. The + mangling performs any necessary endian translations and + removes alignment restrictions. Note that types accepted and + returned by these macros are identical so they can be swapped + around in macros---for example, @file{libaout.h} defines <<GET_WORD>> + to either <<bfd_get_32>> or <<bfd_get_64>>. + + In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a + system without prototypes, the caller is responsible for making + sure that is true, with a cast if necessary. We don't cast + them in the macro definitions because that would prevent <<lint>> + or <<gcc -Wall>> from detecting sins such as passing a pointer. + To detect calling these with less than a <<bfd_vma>>, use + <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s. + +. +.{* Byte swapping macros for user section data. *} +. +.#define bfd_put_8(abfd, val, ptr) \ +. (*((unsigned char *)(ptr)) = (unsigned char)(val)) +.#define bfd_put_signed_8 \ +. bfd_put_8 +.#define bfd_get_8(abfd, ptr) \ +. (*(unsigned char *)(ptr)) +.#define bfd_get_signed_8(abfd, ptr) \ +. ((*(unsigned char *)(ptr) ^ 0x80) - 0x80) +. +.#define bfd_put_16(abfd, val, ptr) \ +. BFD_SEND(abfd, bfd_putx16, ((val),(ptr))) +.#define bfd_put_signed_16 \ +. bfd_put_16 +.#define bfd_get_16(abfd, ptr) \ +. BFD_SEND(abfd, bfd_getx16, (ptr)) +.#define bfd_get_signed_16(abfd, ptr) \ +. BFD_SEND (abfd, bfd_getx_signed_16, (ptr)) +. +.#define bfd_put_32(abfd, val, ptr) \ +. BFD_SEND(abfd, bfd_putx32, ((val),(ptr))) +.#define bfd_put_signed_32 \ +. bfd_put_32 +.#define bfd_get_32(abfd, ptr) \ +. BFD_SEND(abfd, bfd_getx32, (ptr)) +.#define bfd_get_signed_32(abfd, ptr) \ +. BFD_SEND(abfd, bfd_getx_signed_32, (ptr)) +. +.#define bfd_put_64(abfd, val, ptr) \ +. BFD_SEND(abfd, bfd_putx64, ((val), (ptr))) +.#define bfd_put_signed_64 \ +. bfd_put_64 +.#define bfd_get_64(abfd, ptr) \ +. BFD_SEND(abfd, bfd_getx64, (ptr)) +.#define bfd_get_signed_64(abfd, ptr) \ +. BFD_SEND(abfd, bfd_getx_signed_64, (ptr)) +. +*/ + +/* +FUNCTION + bfd_h_put_size + bfd_h_get_size + +DESCRIPTION + These macros have the same function as their <<bfd_get_x>> + bretheren, except that they are used for removing information + for the header records of object files. Believe it or not, + some object files keep their header records in big endian + order and their data in little endian order. +. +.{* Byte swapping macros for file header data. *} +. +.#define bfd_h_put_8(abfd, val, ptr) \ +. bfd_put_8 (abfd, val, ptr) +.#define bfd_h_put_signed_8(abfd, val, ptr) \ +. bfd_put_8 (abfd, val, ptr) +.#define bfd_h_get_8(abfd, ptr) \ +. bfd_get_8 (abfd, ptr) +.#define bfd_h_get_signed_8(abfd, ptr) \ +. bfd_get_signed_8 (abfd, ptr) +. +.#define bfd_h_put_16(abfd, val, ptr) \ +. BFD_SEND(abfd, bfd_h_putx16,(val,ptr)) +.#define bfd_h_put_signed_16 \ +. bfd_h_put_16 +.#define bfd_h_get_16(abfd, ptr) \ +. BFD_SEND(abfd, bfd_h_getx16,(ptr)) +.#define bfd_h_get_signed_16(abfd, ptr) \ +. BFD_SEND(abfd, bfd_h_getx_signed_16, (ptr)) +. +.#define bfd_h_put_32(abfd, val, ptr) \ +. BFD_SEND(abfd, bfd_h_putx32,(val,ptr)) +.#define bfd_h_put_signed_32 \ +. bfd_h_put_32 +.#define bfd_h_get_32(abfd, ptr) \ +. BFD_SEND(abfd, bfd_h_getx32,(ptr)) +.#define bfd_h_get_signed_32(abfd, ptr) \ +. BFD_SEND(abfd, bfd_h_getx_signed_32, (ptr)) +. +.#define bfd_h_put_64(abfd, val, ptr) \ +. BFD_SEND(abfd, bfd_h_putx64,(val, ptr)) +.#define bfd_h_put_signed_64 \ +. bfd_h_put_64 +.#define bfd_h_get_64(abfd, ptr) \ +. BFD_SEND(abfd, bfd_h_getx64,(ptr)) +.#define bfd_h_get_signed_64(abfd, ptr) \ +. BFD_SEND(abfd, bfd_h_getx_signed_64, (ptr)) +. +*/ + +/* Sign extension to bfd_signed_vma. */ +#define COERCE16(x) (((bfd_signed_vma) (x) ^ 0x8000) - 0x8000) +#define COERCE32(x) \ + ((bfd_signed_vma) (long) (((unsigned long) (x) ^ 0x80000000) - 0x80000000)) +#define EIGHT_GAZILLION (((BFD_HOST_64_BIT)0x80000000) << 32) +#define COERCE64(x) \ + (((bfd_signed_vma) (x) ^ EIGHT_GAZILLION) - EIGHT_GAZILLION) + +bfd_vma +bfd_getb16 (addr) + register const bfd_byte *addr; +{ + return (addr[0] << 8) | addr[1]; +} + +bfd_vma +bfd_getl16 (addr) + register const bfd_byte *addr; +{ + return (addr[1] << 8) | addr[0]; +} + +bfd_signed_vma +bfd_getb_signed_16 (addr) + register const bfd_byte *addr; +{ + return COERCE16((addr[0] << 8) | addr[1]); +} + +bfd_signed_vma +bfd_getl_signed_16 (addr) + register const bfd_byte *addr; +{ + return COERCE16((addr[1] << 8) | addr[0]); +} + +void +bfd_putb16 (data, addr) + bfd_vma data; + register bfd_byte *addr; +{ + addr[0] = (bfd_byte)(data >> 8); + addr[1] = (bfd_byte )data; +} + +void +bfd_putl16 (data, addr) + bfd_vma data; + register bfd_byte *addr; +{ + addr[0] = (bfd_byte )data; + addr[1] = (bfd_byte)(data >> 8); +} + +bfd_vma +bfd_getb32 (addr) + register const bfd_byte *addr; +{ + unsigned long v; + + v = (unsigned long) addr[0] << 24; + v |= (unsigned long) addr[1] << 16; + v |= (unsigned long) addr[2] << 8; + v |= (unsigned long) addr[3]; + return (bfd_vma) v; +} + +bfd_vma +bfd_getl32 (addr) + register const bfd_byte *addr; +{ + unsigned long v; + + v = (unsigned long) addr[0]; + v |= (unsigned long) addr[1] << 8; + v |= (unsigned long) addr[2] << 16; + v |= (unsigned long) addr[3] << 24; + return (bfd_vma) v; +} + +bfd_signed_vma +bfd_getb_signed_32 (addr) + register const bfd_byte *addr; +{ + unsigned long v; + + v = (unsigned long) addr[0] << 24; + v |= (unsigned long) addr[1] << 16; + v |= (unsigned long) addr[2] << 8; + v |= (unsigned long) addr[3]; + return COERCE32 (v); +} + +bfd_signed_vma +bfd_getl_signed_32 (addr) + register const bfd_byte *addr; +{ + unsigned long v; + + v = (unsigned long) addr[0]; + v |= (unsigned long) addr[1] << 8; + v |= (unsigned long) addr[2] << 16; + v |= (unsigned long) addr[3] << 24; + return COERCE32 (v); +} + +bfd_vma +bfd_getb64 (addr) + register const bfd_byte *addr; +{ +#ifdef BFD64 + bfd_vma low, high; + + high= ((((((((addr[0]) << 8) | + addr[1]) << 8) | + addr[2]) << 8) | + addr[3]) ); + + low = (((((((((bfd_vma)addr[4]) << 8) | + addr[5]) << 8) | + addr[6]) << 8) | + addr[7])); + + return high << 32 | low; +#else + BFD_FAIL(); + return 0; +#endif +} + +bfd_vma +bfd_getl64 (addr) + register const bfd_byte *addr; +{ +#ifdef BFD64 + bfd_vma low, high; + high= (((((((addr[7] << 8) | + addr[6]) << 8) | + addr[5]) << 8) | + addr[4])); + + low = ((((((((bfd_vma)addr[3] << 8) | + addr[2]) << 8) | + addr[1]) << 8) | + addr[0]) ); + + return high << 32 | low; +#else + BFD_FAIL(); + return 0; +#endif + +} + +bfd_signed_vma +bfd_getb_signed_64 (addr) + register const bfd_byte *addr; +{ +#ifdef BFD64 + bfd_vma low, high; + + high= ((((((((addr[0]) << 8) | + addr[1]) << 8) | + addr[2]) << 8) | + addr[3]) ); + + low = (((((((((bfd_vma)addr[4]) << 8) | + addr[5]) << 8) | + addr[6]) << 8) | + addr[7])); + + return COERCE64(high << 32 | low); +#else + BFD_FAIL(); + return 0; +#endif +} + +bfd_signed_vma +bfd_getl_signed_64 (addr) + register const bfd_byte *addr; +{ +#ifdef BFD64 + bfd_vma low, high; + high= (((((((addr[7] << 8) | + addr[6]) << 8) | + addr[5]) << 8) | + addr[4])); + + low = ((((((((bfd_vma)addr[3] << 8) | + addr[2]) << 8) | + addr[1]) << 8) | + addr[0]) ); + + return COERCE64(high << 32 | low); +#else + BFD_FAIL(); + return 0; +#endif +} + +void +bfd_putb32 (data, addr) + bfd_vma data; + register bfd_byte *addr; +{ + addr[0] = (bfd_byte)(data >> 24); + addr[1] = (bfd_byte)(data >> 16); + addr[2] = (bfd_byte)(data >> 8); + addr[3] = (bfd_byte)data; +} + +void +bfd_putl32 (data, addr) + bfd_vma data; + register bfd_byte *addr; +{ + addr[0] = (bfd_byte)data; + addr[1] = (bfd_byte)(data >> 8); + addr[2] = (bfd_byte)(data >> 16); + addr[3] = (bfd_byte)(data >> 24); +} + +void +bfd_putb64 (data, addr) + bfd_vma data; + register bfd_byte *addr; +{ +#ifdef BFD64 + addr[0] = (bfd_byte)(data >> (7*8)); + addr[1] = (bfd_byte)(data >> (6*8)); + addr[2] = (bfd_byte)(data >> (5*8)); + addr[3] = (bfd_byte)(data >> (4*8)); + addr[4] = (bfd_byte)(data >> (3*8)); + addr[5] = (bfd_byte)(data >> (2*8)); + addr[6] = (bfd_byte)(data >> (1*8)); + addr[7] = (bfd_byte)(data >> (0*8)); +#else + BFD_FAIL(); +#endif +} + +void +bfd_putl64 (data, addr) + bfd_vma data; + register bfd_byte *addr; +{ +#ifdef BFD64 + addr[7] = (bfd_byte)(data >> (7*8)); + addr[6] = (bfd_byte)(data >> (6*8)); + addr[5] = (bfd_byte)(data >> (5*8)); + addr[4] = (bfd_byte)(data >> (4*8)); + addr[3] = (bfd_byte)(data >> (3*8)); + addr[2] = (bfd_byte)(data >> (2*8)); + addr[1] = (bfd_byte)(data >> (1*8)); + addr[0] = (bfd_byte)(data >> (0*8)); +#else + BFD_FAIL(); +#endif +} + +/* Default implementation */ + +boolean +_bfd_generic_get_section_contents (abfd, section, location, offset, count) + bfd *abfd; + sec_ptr section; + PTR location; + file_ptr offset; + bfd_size_type count; +{ + if (count == 0) + return true; + if ((bfd_size_type)(offset+count) > section->_raw_size + || bfd_seek(abfd, (file_ptr)(section->filepos + offset), SEEK_SET) == -1 + || bfd_read(location, (bfd_size_type)1, count, abfd) != count) + return (false); /* on error */ + return (true); +} + +boolean +_bfd_generic_get_section_contents_in_window (abfd, section, w, offset, count) + bfd *abfd; + sec_ptr section; + bfd_window *w; + file_ptr offset; + bfd_size_type count; +{ +#ifdef USE_MMAP + if (count == 0) + return true; + if (abfd->xvec->_bfd_get_section_contents != _bfd_generic_get_section_contents) + { + /* We don't know what changes the bfd's get_section_contents + method may have to make. So punt trying to map the file + window, and let get_section_contents do its thing. */ + /* @@ FIXME : If the internal window has a refcount of 1 and was + allocated with malloc instead of mmap, just reuse it. */ + bfd_free_window (w); + w->i = (bfd_window_internal *) bfd_zmalloc (sizeof (bfd_window_internal)); + if (w->i == NULL) + return false; + w->i->data = (PTR) bfd_malloc ((size_t) count); + if (w->i->data == NULL) + { + free (w->i); + w->i = NULL; + return false; + } + w->i->mapped = 0; + w->i->refcount = 1; + w->size = w->i->size = count; + w->data = w->i->data; + return bfd_get_section_contents (abfd, section, w->data, offset, count); + } + if ((bfd_size_type) (offset+count) > section->_raw_size + || (bfd_get_file_window (abfd, section->filepos + offset, count, w, true) + == false)) + return false; + return true; +#else + abort (); +#endif +} + +/* This generic function can only be used in implementations where creating + NEW sections is disallowed. It is useful in patching existing sections + in read-write files, though. See other set_section_contents functions + to see why it doesn't work for new sections. */ +boolean +_bfd_generic_set_section_contents (abfd, section, location, offset, count) + bfd *abfd; + sec_ptr section; + PTR location; + file_ptr offset; + bfd_size_type count; +{ + if (count == 0) + return true; + + if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) == -1 + || bfd_write (location, (bfd_size_type) 1, count, abfd) != count) + return false; + + return true; +} + +/* +INTERNAL_FUNCTION + bfd_log2 + +SYNOPSIS + unsigned int bfd_log2(bfd_vma x); + +DESCRIPTION + Return the log base 2 of the value supplied, rounded up. E.g., an + @var{x} of 1025 returns 11. +*/ + +unsigned int +bfd_log2 (x) + bfd_vma x; +{ + unsigned int result = 0; + + while ((((bfd_vma) 1) << result) < x) + ++result; + return result; +} + +boolean +bfd_generic_is_local_label_name (abfd, name) + bfd *abfd; + const char *name; +{ + char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.'; + + return (name[0] == locals_prefix); +} + |