diff options
Diffstat (limited to 'sysdeps/hppa/elf')
| -rw-r--r-- | sysdeps/hppa/elf/initfini.c | 117 | ||||
| -rw-r--r-- | sysdeps/hppa/elf/start.S | 58 |
2 files changed, 175 insertions, 0 deletions
diff --git a/sysdeps/hppa/elf/initfini.c b/sysdeps/hppa/elf/initfini.c new file mode 100644 index 0000000000..c058ed0425 --- /dev/null +++ b/sysdeps/hppa/elf/initfini.c @@ -0,0 +1,117 @@ +/* Special .init and .fini section support for HPPA + Copyright (C) 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it + and/or modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Library General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The Library General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + The GNU C Library 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 Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* This file is compiled into assembly code which is then munged by a sed + script into two files: crti.s and crtn.s. + + * crti.s puts a function prologue at the beginning of the + .init and .fini sections and defines global symbols for + those addresses, so they can be called as functions. + + * crtn.s puts the corresponding function epilogues + in the .init and .fini sections. */ + +/* If we use the standard C version, the linkage table pointer won't + be properly preserved due to the splitting up of function prologues + and epilogues. Therefore we write these in assembly to make sure + they do the right thing. + + Note that we cannot have a weak undefined __gmon_start__, because + that would require this to be PIC, and the linker is currently not + able to generate a proper procedure descriptor for _init. Sad but + true. Anyway, HPPA is one of those horrible architectures where + making the comparison and indirect call is quite expensive (see the + comment in sysdeps/generic/initfini.c). */ + +__asm__ (" + +#include \"defs.h\" + +/*@HEADER_ENDS*/ + +/*@_init_PROLOG_BEGINS*/ + .section .init + .align 4 + .globl _init + .type _init,@function + .proc + .callinfo +_init: + stw %rp,-20(%sp) + stwm %r4,64(%sp) + stw %r19,-32(%sp) + bl __gmon_start__,%rp + copy %r19,%r4 /* delay slot */ + copy %r4,%r19 + .align 4 + .procend +/*@_init_PROLOG_ENDS*/ + +/*@_init_EPILOG_BEGINS*/ + .section .init + copy %r4,%r19 + ldw -84(%sp),%rp + bv %r0(%rp) + ldwm -64(%sp),%r4 + .text + .align 4 + .weak __gmon_start__ + .type __gmon_start__,@function + .proc + .callinfo +__gmon_start__: + bv,n %r0(%r2) + .procend +/*@_init_EPILOG_ENDS*/ + +/*@_fini_PROLOG_BEGINS*/ + .section .fini + .align 4 + .globl _fini + .type _fini,@function + .proc + .callinfo +_fini: + stw %rp,-20(%sp) + stwm %r4,64(%sp) + stw %r19,-32(%sp) + copy %r19,%r4 + .align 4 + .procend +/*@_fini_PROLOG_ENDS*/ + +/*@_fini_EPILOG_BEGINS*/ + .section .fini + copy %r4,%r19 + ldw -84(%sp),%rp + bv %r0(%rp) + ldwm -64(%sp),%r4 +/*@_fini_EPILOG_ENDS*/ + +/*@TRAILER_BEGINS*/ +"); diff --git a/sysdeps/hppa/elf/start.S b/sysdeps/hppa/elf/start.S new file mode 100644 index 0000000000..88bb790be2 --- /dev/null +++ b/sysdeps/hppa/elf/start.S @@ -0,0 +1,58 @@ + + .text + + .align 4 + + .import main, code + .import $global$, data + .import __libc_start_main, code + .import _fini, code + .import _init, code + + + + + .globl _start + .export _start, ENTRY + +_start: + + .proc + .callinfo + + /* load main */ + ldil LP%main, %r26 + ldo RP%main(%r26), %r26 + + /* argc and argv should be in 25 and 24 */ + + /* Expand the stack to store the 5th through 7th args */ + ldo 64(%sp), %sp + + /* void (*rtld_fini) (void) (actually the 6th arg) */ + stw %r23, -56(%sp) + + /* void (*init) (void) */ + ldil LP%_init, %r23 + ldo RP%_init(%r23), %r23 + + /* void (*fini) (void) */ + ldil LP%_fini, %r22 + ldo RP%_fini(%r22), %r22 + stw %r22, -52(%sp) + + /* void *stack_end */ + stw %sp, -60(%sp) + + /* load global */ + ldil L%$global$, %dp + ldo R%$global$(%dp), %dp + + bl __libc_start_main,%r2 + nop + /* die horribly if it returned (it shouldn't) */ + iitlbp %r0,(%r0) + nop + + .procend + |