diff options
Diffstat (limited to 'ldso/ldso/frv/dl-startup.h')
| -rw-r--r-- | ldso/ldso/frv/dl-startup.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/ldso/ldso/frv/dl-startup.h b/ldso/ldso/frv/dl-startup.h new file mode 100644 index 000000000..017efc0ad --- /dev/null +++ b/ldso/ldso/frv/dl-startup.h @@ -0,0 +1,89 @@ + /* Copyright (C) 2003 Red Hat, Inc. + Contributed by Alexandre Oliva <aoliva@redhat.com> + +This file is part of uClibc. + +uClibc is free software; you can redistribute it and/or modify it +under the terms of the GNU Lesser General Public License as +published by the Free Software Foundation; either version 2.1 of the +License, or (at your option) any later version. + +uClibc 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 +Library General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with uClibc; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, +USA. */ + +/* Any assembly language/system dependent hacks needed to setup + * boot1.c so it will work as expected and cope with whatever platform + * specific wierdness is needed for this architecture. + + * We override the default _dl_boot function, and replace it with a + * bit of asm. Then call the real _dl_boot function, which is now + * named _dl_boot2. */ + +/* At program start-up, gr16 contains a pointer to a + elf32_fdpic_loadmap that describes how the executable was loaded + into memory. gr17 contains a pointer to the interpreter (our!) + loadmap, if there is an interpreter, or 0 if we're being run as an + executable. gr18 holds a pointer to the interpreter's dynamic + section, if there is an interpreter, or to the executable's dynamic + section, otherwise. If the executable is not dynamic, gr18 is 0. + + We rely on the fact that the linker adds a pointer to the + _GLOBAL_OFFSET_TABLE_ as the last ROFIXUP entry, and that + __self_reloc returns the relocated pointer to us, so that we can + use this value to initialize the PIC register. */ + +asm("" \ +" .text\n" \ +" .global _dl_boot\n" \ +" .type _dl_boot,@function\n" \ +"_dl_boot:\n" \ +" call .Lcall\n" \ +".Lcall:\n" \ +" movsg lr, gr4\n" \ +" sethi.p #gprelhi(.Lcall), gr5\n"\ +" setlo #gprello(.Lcall), gr5\n"\ +" mov.p gr17, gr8\n" \ +" cmp gr17, gr0, icc0\n" \ +" sub.p gr4, gr5, gr4\n" \ +" ckeq icc0, cc4\n" \ +" cmov.p gr16, gr8, cc4, 1\n" \ +" sethi #gprelhi(__ROFIXUP_LIST__), gr9\n" \ +" sethi.p #gprelhi(__ROFIXUP_END__), gr10\n" \ +" setlo #gprello(__ROFIXUP_LIST__), gr9\n" \ +" setlo.p #gprello(__ROFIXUP_END__), gr10\n" \ +" add gr9, gr4, gr9\n" \ +" add.p gr10, gr4, gr10\n" \ +" call __self_reloc\n" \ +" mov.p gr8, gr15\n" \ +" mov gr16, gr9\n" \ +" mov.p gr17, gr10\n" \ +" mov gr18, gr11\n" \ +" addi.p sp, #4, gr13\n" \ +" addi sp, #-8, sp\n" \ +" mov.p sp, gr12\n" \ +" call _dl_boot2\n" \ +" ldd.p @(sp, gr0), gr14\n" \ +" addi sp, #8, sp\n" \ +" movgs gr0, lr\n" \ +" jmpl @(gr14, gr0)\n" \ +" .size _dl_boot,.-_dl_boot\n" \ +); + +#define _dl_boot _dl_boot2 +#define DL_BOOT(X) \ +static void __attribute__ ((used)) \ +_dl_boot (void *dl_boot_got_pointer, \ + struct elf32_fdpic_loadmap *dl_boot_progmap, \ + struct elf32_fdpic_loadmap *dl_boot_ldsomap, \ + Elf32_Dyn *dl_boot_ldso_dyn_pointer, \ + struct funcdesc_value *dl_main_funcdesc, \ + X) + +struct elf32_fdpic_loadmap; |