diff options
Diffstat (limited to 'sysdeps/sh/elf')
| -rw-r--r-- | sysdeps/sh/elf/initfini.c | 151 | ||||
| -rw-r--r-- | sysdeps/sh/elf/start.S | 90 |
2 files changed, 241 insertions, 0 deletions
diff --git a/sysdeps/sh/elf/initfini.c b/sysdeps/sh/elf/initfini.c new file mode 100644 index 0000000000..0660c2cd8c --- /dev/null +++ b/sysdeps/sh/elf/initfini.c @@ -0,0 +1,151 @@ +/* Special .init and .fini section support for SH. + 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. */ + +__asm__ (" + +#include \"defs.h\" +#define SHARED + +/*@HEADER_ENDS*/ + +/*@TESTS_BEGIN*/ + +/*@TESTS_END*/ + +/*@_init_PROLOG_BEGINS*/ + .section .init + .align 5 + .global _init + .type _init,@function +_init: + mov.l r12,@-r15 + mov.l r14,@-r15 + sts.l pr,@-r15 +#ifdef SHARED + mova .L22,r0 + mov.l .L22,r12 + add r0,r12 + mova .L23,r0 + mov.l .L23,r1 + add r0,r1 +#else + mov.l .L23,r1 +#endif + jsr @r1 + mov r15,r14 + bra 1f + nop + .align 2 +#ifdef SHARED +.L22: + .long _GLOBAL_OFFSET_TABLE_ +.L23: + .long __gmon_start__@PLT +#else +.L23: + .long __gmon_start__ +#endif +1: + ALIGN + END_INIT + + +/*@_init_PROLOG_ENDS*/ + +/*@_init_EPILOG_BEGINS*/ + .section .init + mov r14,r15 + lds.l @r15+,pr + mov.l @r15+,r14 + rts + mov.l @r15+,r12 + END_INIT + .section .text + .align 5 + .weak __gmon_start__ + .type __gmon_start__,@function +__gmon_start__: + mov.l r14,@-r15 + mov r15,r14 + mov r14,r15 + rts + mov.l @r15+,r14 + +/*@_init_EPILOG_ENDS*/ + +/*@_fini_PROLOG_BEGINS*/ + .section .fini + .align 5 + .global _fini + .type _fini,@function +_fini: + mov.l r12,@-$r15 + mov.l r14,@-r15 + sts.l pr,@-r15 +#ifdef SHARED + mova .L27,r0 + mov.l .L27,r12 + add r0,r12 +#endif + mov r15,r14 + ALIGN + END_FINI +#ifdef SHARED + bra 1f + nop + .align 2 +.L27: + .long _GLOBAL_OFFSET_TABLE_ +#endif +1: +/*@_fini_PROLOG_ENDS*/ + +/*@_fini_EPILOG_BEGINS*/ + .section .fini + mov r14,r15 + lds.l @r15+,pr + mov.l @r15+,r14 + rts + mov.l @r15+,r12 + + END_FINI + +/*@_fini_EPILOG_ENDS*/ + +/*@TRAILER_BEGINS*/ +"); diff --git a/sysdeps/sh/elf/start.S b/sysdeps/sh/elf/start.S new file mode 100644 index 0000000000..21b1ec2a4b --- /dev/null +++ b/sysdeps/sh/elf/start.S @@ -0,0 +1,90 @@ +/* Startup code for SH & ELF. + Copyright (C) 1999 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. + + 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, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* This is the canonical entry point, usually the first thing in the text + segment. + + Note that the code in the .init section has already been run. + This includes _init and _libc_init + + + At this entry point, most registers' values are unspecified, except: + + r4 Contains a function pointer to be registered with `atexit'. + This is how the dynamic linker arranges to have DT_FINI + functions called for shared libraries that have been loaded + before this code runs. + + sp The stack contains the arguments and environment: + 0(sp) argc + 4(sp) argv[0] + ... + (4*argc)(sp) NULL + (4*(argc+1))(sp) envp[0] + ... + NULL +*/ + + .text + .globl _start +_start: + /* Clear the frame pointer since this is the outermost frame. */ + mov #0, r14 + + /* Pop argc off the stack and save a pointer to argv */ + mov.l @r15+,r5 + mov r15, r6 + + /* Push the last arguments to main() onto the stack */ + mov.l r4,@-r15 + mov.l L_fini,r0 + mov.l r0,@-r15 + + /* Set up the other arguments for main() that go in registers */ + mov.l L_main,r4 + mov.l L_init,r7 + + /* __libc_start_main (main, argc, argv, init, fini, rtld_fini) */ + + /* Let the libc call main and exit with its return code. */ + mov.l L_libc_start_main,r1 + jsr @r1 + nop + /* should never get here....*/ + mov.l L_abort,r1 + jsr @r1 + nop + .align 2 +L_main: + .long main +L_init: + .long _init +L_fini: + .long _fini +L_libc_start_main: + .long __libc_start_main +L_abort: + .long abort +/* Define a symbol for the first piece of initialized data. */ + .data + .globl __data_start +__data_start: + .long 0 + .weak data_start + data_start = __data_start |