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| author | Jeff Johnston <jjohnstn@redhat.com> | 2006-11-08 19:36:56 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2006-11-08 19:36:56 +0000 |
| commit | c0977673acb66eb05898458a280da873067e6709 (patch) | |
| tree | 6e68ea94b3a4fedf1ac12945af7a8cb4d48201c0 /libgloss/bfin/crt0.S | |
| parent | 292f8e2328d56d163f5a2fc7f07f348ccd6bb1ae (diff) | |
| download | cygnal-c0977673acb66eb05898458a280da873067e6709.tar.gz cygnal-c0977673acb66eb05898458a280da873067e6709.tar.bz2 cygnal-c0977673acb66eb05898458a280da873067e6709.zip | |
2006-11-08 Jie Zhang <jzhang918@gmail.com>
* bfin/configure.in: New.
* bfin/crt0.S: New.
* bfin/Makefile.in: New.
* bfin/syscalls.c: New.
* bfin/aclocal.m4: Generate.
* bfin/configure: Ditto.
* configure.in: Add support for bfin-*-*.
* configure: Regenerate.
* syscall.h (SYS_argc): Define.
(SYS_argnlen): Define.
(SYS_argn): Define.
Diffstat (limited to 'libgloss/bfin/crt0.S')
| -rw-r--r-- | libgloss/bfin/crt0.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libgloss/bfin/crt0.S b/libgloss/bfin/crt0.S new file mode 100644 index 000000000..f34b5154b --- /dev/null +++ b/libgloss/bfin/crt0.S @@ -0,0 +1,72 @@ +/* + * crt0.S for the Blackfin processor + * + * Copyright (C) 2006 Analog Devices, Inc. + * + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ + + .text + .align 2 + + .global __start +__start: + + /* Start by setting up a stack */ + link 0xc; + /* Zero the memory in the .bss section. */ + + p0.l = __edata; + p0.h = __edata; + p1.l = __end; + p1.h = __end; + p1 -= p0; + r0 = 0; + lsetup (L$L$clear_bss, L$L$clear_bss) lc0 = p1; +L$L$clear_bss: + B [p0++] = r0; + +#ifdef __BFIN_FDPIC__ + /* Set up GOT pointer. */ + P0.L = __ROFIXUP_END__; + P0.H = __ROFIXUP_END__; + P4 = [P0 - 4]; +#endif + + /* Need to set up standard file handles */ + /* Parse string at r1 */ + + p0.l = __init; + p0.h = __init; + P3 = P4; + call (p0) + + p0.l = _atexit; + p0.h = _atexit; +#ifdef __BFIN_FDPIC__ + r0 = [P4 + __fini@FUNCDESC_GOT17M4] ; + P3 = P4; +#else + r0.l = __fini; + r0.h = __fini; +#endif + call (p0) + + p0.l = ___setup_argv_and_call_main; + p0.h = ___setup_argv_and_call_main; + P3 = P4; + call (p0) + + p0.l = _exit; + p0.h = _exit; + P3 = P4; + jump (p0) /* Should not return. */ + nop; |