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* ld/emultempl/pe.em (pe_enable_auto_image_base): New variable.

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(longopts): New --{enable,disable}-auto-image-base options.
(gld_${EMULATION_NAME}_list_options): Document.
(gld_${EMULATION_NAME}_parse): Handle.
(strhash): New static function.
(compute_dll_image_base): New static function.
(gld_${EMULATION_NAME}_set_symbols): Use.
This commit is contained in:
DJ Delorie 2000-07-07 20:01:35 +00:00
parent 27e232885d
commit 5f577f7d70
2 changed files with 58 additions and 1 deletions
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10
ld/ChangeLog
View File

@ -1,3 +1,13 @@
2000-07-07 Mumit Khan <khan@xraylith.wisc.edu>
* ld/emultempl/pe.em (pe_enable_auto_image_base): New variable.
(longopts): New --{enable,disable}-auto-image-base options.
(gld_${EMULATION_NAME}_list_options): Document.
(gld_${EMULATION_NAME}_parse): Handle.
(strhash): New static function.
(compute_dll_image_base): New static function.
(gld_${EMULATION_NAME}_set_symbols): Use.
2000-06-05 DJ Delorie <dj@redhat.com>
* MAINTAINERS: new

49
ld/emultempl/pe.em
View File

@ -118,6 +118,7 @@ static int pe_enable_stdcall_fixup = -1; /* 0=disable 1=enable */
#ifdef DLL_SUPPORT
static char *pe_out_def_filename = NULL;
static char *pe_implib_filename = NULL;
static int pe_enable_auto_image_base = 0;
#endif
extern const char *output_filename;
@ -169,6 +170,8 @@ gld_${EMULATION_NAME}_before_parse()
#define OPTION_THUMB_ENTRY (OPTION_IMPLIB_FILENAME + 1)
#define OPTION_WARN_DUPLICATE_EXPORTS (OPTION_THUMB_ENTRY + 1)
#define OPTION_IMP_COMPAT (OPTION_WARN_DUPLICATE_EXPORTS + 1)
#define OPTION_ENABLE_AUTO_IMAGE_BASE (OPTION_IMP_COMPAT + 1)
#define OPTION_DISABLE_AUTO_IMAGE_BASE (OPTION_ENABLE_AUTO_IMAGE_BASE + 1)
static struct option longopts[] =
{
@ -203,6 +206,8 @@ static struct option longopts[] =
{"out-implib", required_argument, NULL, OPTION_IMPLIB_FILENAME},
{"warn-duplicate-exports", no_argument, NULL, OPTION_WARN_DUPLICATE_EXPORTS},
{"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT},
{"enable-auto-image-base", no_argument, NULL, OPTION_ENABLE_AUTO_IMAGE_BASE},
{"disable-auto-image-base", no_argument, NULL, OPTION_DISABLE_AUTO_IMAGE_BASE},
#endif
{NULL, no_argument, NULL, 0}
};
@ -282,6 +287,9 @@ gld_${EMULATION_NAME}_list_options (file)
fprintf (file, _(" --warn-duplicate-exports Warn about duplicate exports.\n"));
fprintf (file, _(" --compat-implib Create backward compatible import libs;\n"));
fprintf (file, _(" create __imp_<SYMBOL> as well.\n"));
fprintf (file, _(" --enable-auto-image-base Automatically choose image base for DLLs\n"));
fprintf (file, _(" unless user specifies one\n"));
fprintf (file, _(" --disable-auto-image-base Do not auto-choose image base. (default)\n"));
#endif
}
@ -540,11 +548,49 @@ gld_${EMULATION_NAME}_parse_args(argc, argv)
case OPTION_IMP_COMPAT:
pe_dll_compat_implib = 1;
break;
case OPTION_ENABLE_AUTO_IMAGE_BASE:
pe_enable_auto_image_base = 1;
break;
case OPTION_DISABLE_AUTO_IMAGE_BASE:
pe_enable_auto_image_base = 0;
break;
#endif
}
return 1;
}
static unsigned long
strhash (const char *str)
{
const unsigned char *s;
unsigned long hash;
unsigned int c;
unsigned int len;
hash = 0;
len = 0;
s = (const unsigned char *) str;
while ((c = *s++) != '\0')
{
hash += c + (c << 17);
hash ^= hash >> 2;
++len;
}
hash += len + (len << 17);
hash ^= hash >> 2;
return hash;
}
/* Use the output file to create a image base for relocatable DLLs. */
static unsigned long
compute_dll_image_base (const char *ofile)
{
unsigned long hash = strhash (ofile);
return 0x60000000 | ((hash << 16) & 0x0FFC0000);
}
/* Assign values to the special symbols before the linker script is
read. */
@ -561,7 +607,8 @@ gld_${EMULATION_NAME}_set_symbols ()
if (link_info.relocateable)
init[IMAGEBASEOFF].value = 0;
else if (init[DLLOFF].value || link_info.shared)
init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE;
init[IMAGEBASEOFF].value = (pe_enable_auto_image_base) ?
compute_dll_image_base (output_filename) : NT_DLL_IMAGE_BASE;
else
init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE;
}