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authorNick Clifton <nickc@redhat.com>2000-07-28 00:57:45 +0000
committerNick Clifton <nickc@redhat.com>2000-07-28 00:57:45 +0000
commit88cdf2977590c1a5405c709b41f7d916f1c129f0 (patch)
treee092f7f9398749793fe31ec2443d4bc518dec7d2
parent456981d71502f17f86b9b3a7fbcef5cec3abcb5d (diff)
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Implement -taso command line option.
-rw-r--r--ld/ChangeLog8
-rw-r--r--ld/emulparams/elf64alpha.sh85
2 files changed, 93 insertions, 0 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog
index d082eb8..24557ca 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,11 @@
+2000-07-27 Ivan Kokshaysky <ink@jurassic.park.msu.ru>
+
+ * emulparams/elf64alpha.sh: Implement "-taso" emulation
+ specific option to fit 64-bit executable in the lower
+ 31-bit address range. This is done by changing start
+ address of .interp (the very first section of executable)
+ and then setting EF_ALPHA_32BIT elf header flag.
+
2000-07-21 Michael Sokolov <msokolov@ivan.Harhan.ORG>
* emultempl/m68kcoff.em: New file.
diff --git a/ld/emulparams/elf64alpha.sh b/ld/emulparams/elf64alpha.sh
index afa21f2..c3e4e52 100644
--- a/ld/emulparams/elf64alpha.sh
+++ b/ld/emulparams/elf64alpha.sh
@@ -13,3 +13,88 @@ DATA_PLT=
NOP=0x47ff041f
OTHER_READONLY_SECTIONS='.reginfo : { *(.reginfo) }'
+
+# This code gets inserted into the generic elf32.sc linker script
+# and allows us to define our own command line switches.
+PARSE_AND_LIST_ARGS='
+#define OPTION_TASO 300
+/* Set the start address as in the Tru64 ld */
+#define ALPHA_TEXT_START_32BIT 0x12000000
+
+static int elf64alpha_32bit = 0;
+
+static struct option longopts[] =
+{
+ {"taso", no_argument, NULL, OPTION_TASO},
+ {NULL, no_argument, NULL, 0}
+};
+
+static void
+gld_elf64alpha_list_options (file)
+ FILE * file;
+{
+ fprintf (file, _(
+" -taso Load executable in the lower 31-bit addressable
+ virtual address range.\n"));
+}
+
+struct ld_emulation_xfer_struct ld_elf64alpha_emulation;
+static void gld_elf64alpha_finish ();
+
+static int
+gld_elf64alpha_parse_args (argc, argv)
+ int argc;
+ char ** argv;
+{
+ int longind;
+ int optc;
+ int prevoptind = optind;
+ int prevopterr = opterr;
+ int wanterror;
+ static int lastoptind = -1;
+
+ if (lastoptind != optind)
+ opterr = 0;
+
+ wanterror = opterr;
+ lastoptind = optind;
+
+ optc = getopt_long_only (argc, argv, "-", longopts, & longind);
+ opterr = prevopterr;
+
+ switch (optc)
+ {
+ default:
+ if (wanterror)
+ xexit (1);
+ optind = prevoptind;
+ return 0;
+
+ case EOF:
+ if (elf64alpha_32bit && !link_info.shared && !link_info.relocateable)
+ {
+ lang_section_start (".interp",
+ exp_binop ('\''+'\'',
+ exp_intop (ALPHA_TEXT_START_32BIT),
+ exp_nameop (SIZEOF_HEADERS, NULL)));
+ ld_elf64alpha_emulation.finish = gld_elf64alpha_finish;
+ }
+ return 0;
+
+ case OPTION_TASO:
+ elf64alpha_32bit = 1;
+ break;
+ }
+
+ return 1;
+}
+
+#include "elf/internal.h"
+#include "elf/alpha.h"
+#include "elf-bfd.h"
+
+static void
+gld_elf64alpha_finish ()
+{
+ elf_elfheader (output_bfd)->e_flags |= EF_ALPHA_32BIT;
+}'