diff options
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/m68k/crt0.S | 72 | ||||
| -rw-r--r-- | libc/sysdeps/linux/m68k/crt1.S | 108 |
2 files changed, 108 insertions, 72 deletions
diff --git a/libc/sysdeps/linux/m68k/crt0.S b/libc/sysdeps/linux/m68k/crt0.S deleted file mode 100644 index 44aca7fd1..000000000 --- a/libc/sysdeps/linux/m68k/crt0.S +++ /dev/null @@ -1,72 +0,0 @@ -/* Copyright (C) 1991, 1992 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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -/* - * NOTE: this file works for PIC and non-PIC code. Be very careful how - * you modify it ! - */ - -#include <features.h> - - .global _start - .global __exit - .global atexit - .global main - - .text - - nop - nop -_start: /* put here so that references to _start work with elf-PIC */ - - movea.l %d5, %a5 /* uClinux passes in data segment here */ -/* - * argc, argv and envp are on the stack, just call to main - */ - lea __uClibc_main-.-8, %a0 /* call uClibc main */ - jsr %pc@(%a0) - - /* If that didn't kill us, ... */ -__exit: - move.l %sp@+,%d1 - moveq #1,%d0 /* __NR_exit */ - trap #0 - -/* - * this was needed for gcc/g++-builds, atexit was not getting included - * for some stupid reason, this gets us a compiler - */ -empty_func: - rts -#if defined(__HAVE_ELF__) - .weak atexit - atexit = empty_func -#else - .set atexit,empty_func -#endif - - -/* 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 - diff --git a/libc/sysdeps/linux/m68k/crt1.S b/libc/sysdeps/linux/m68k/crt1.S new file mode 100644 index 000000000..ee25e48eb --- /dev/null +++ b/libc/sysdeps/linux/m68k/crt1.S @@ -0,0 +1,108 @@ +/* Startup code compliant to the ELF m68k ABI. + Copyright (C) 1996, 1997, 1998, 2001, 2002 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 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. + + In addition to the permissions in the GNU Lesser 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 GNU Lesser 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.) + + Note that people who make modified versions of this file are not + obligated to grant this special exception for their modified + versions; it is their choice whether to do so. The GNU Lesser + General Public License gives permission to release a modified + version without this exception; this exception also makes it + possible to release a modified version which carries forward this + exception. + + 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; 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. The SVR4/m68k ABI says that when the entry point runs, + most registers' values are unspecified, except for: + + %a1 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 +*/ + +#include <features.h> + + .text + .type _init,%function + .type _fini,%function +#ifndef __UCLIBC_CTOR_DTOR__ + .weak _init + .weak _fini +#endif + .globl _start + .type _start,@function +_start: + /* Clear the frame pointer. The ABI suggests this be done, to mark + the outermost frame obviously. */ + sub.l %fp, %fp + + /* Extract the arguments as encoded on the stack and set up the + arguments for `main': argc, argv. envp will be determined + later in __libc_start_main. */ + move.l (%sp)+, %d0 /* Pop the argument count. */ + move.l %sp, %a0 /* The argument vector starts just at the + current stack top. */ + + /* Provide the highest stack address to the user code (for stacks + which grow downward). */ + pea (%sp) + + pea (%a1) /* Push address of the shared library + termination function. */ + + /* Push the address of our own entry points to `.fini' and + `.init'. */ + pea _fini + pea _init + + pea (%a0) /* Push second argument: argv. */ + move.l %d0, -(%sp) /* Push first argument: argc. */ + + pea main + + /* Call the user's main function, and exit with its value. But + let the libc call main. */ + jbsr __uClibc_main + + illegal /* Crash if somehow `exit' does return. */ + +/* 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 |