diff options
Diffstat (limited to 'sysdeps/ia64/elf/start.S')
-rw-r--r-- | sysdeps/ia64/elf/start.S | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/ia64/elf/start.S b/sysdeps/ia64/elf/start.S new file mode 100644 index 0000000000..424fae8471 --- /dev/null +++ b/sysdeps/ia64/elf/start.S @@ -0,0 +1,84 @@ +/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999. + + 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. */ + +#include <asm/unistd.h> +#include <asm/fpu.h> + +/* + * Arguments for __libc_start_main: + * out0: main + * out1: argc + * out2: argv + * out3: init + * out4: fini + * out5: rtld_fini + * out6: stack_end + */ + + .psr abi64 + .psr lsb + .lsb + + .text + + .global _start# + .proc _start# + +_start: + { .mlx + alloc r2 = ar.pfs,0,0,7,0 + movl r3 = FPSR_DEFAULT + } + { .mlx + adds out2 = 16, sp /* get address of argc value */ + movl gp = @gprel(0f) + ;; + } +0: { .mii + ld8 out1 = [out2], 8 /* load argc and move out2 to become argv */ + mov r9 = ip + ;; + sub gp = r9, gp /* back-compute gp value */ + ;; + } + { .mfi + mov ar.fpsr = r3 + addl out0 = @ltoff(@fptr(main#)), gp + } + { .mfi + addl out4 = @ltoff(@fptr(_fini#)), gp + addl out3 = @ltoff(@fptr(_init#)), gp + ;; + } + { .mmi + ld8 out0 = [out0] /* pointer to `main' function descriptor */ + ld8 out3 = [out3] /* pointer to `init' function descriptor */ + adds out6 = 16, sp /* highest non-environment stack address */ + } + { .mib + ld8 out4 = [out4] /* pointer to `fini' function descriptor */ + mov out5 = ret0 /* dynamic linker destructor */ + br.call.sptk.few rp = __libc_start_main# + } + { .mib + mov rp = r0 + br.ret.sptk.few rp /* break miserably if we ever return */ + ;; + } + .endp _start# |