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Diffstat (limited to 'ports/sysdeps/tile/dl-start.S')
| -rw-r--r-- | ports/sysdeps/tile/dl-start.S | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/ports/sysdeps/tile/dl-start.S b/ports/sysdeps/tile/dl-start.S deleted file mode 100644 index d13f6096dc..0000000000 --- a/ports/sysdeps/tile/dl-start.S +++ /dev/null @@ -1,114 +0,0 @@ -/* Copyright (C) 2011-2014 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - 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. - - 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, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - - /* Get address of "sym" in "reg" assuming r51 holds ".Llink". */ - .macro pic_addr reg, sym -#ifdef __tilegx__ - moveli \reg, hw1_last(\sym - .Llink) - shl16insli \reg, \reg, hw0(\sym - .Llink) - ADD_PTR \reg, r51, \reg -#else - ADDLI_PTR \reg, r51, lo16(\sym - .Llink) - auli \reg, \reg, ha16(\sym - .Llink) -#endif - .endm - - .text -ENTRY (_start) - /* Linux starts us with sp pointing at the conventional Elf layout, - but we need to allow two 'caller' words for our ABI convention. */ - { - move r52, sp - andi sp, sp, -8 - } - cfi_def_cfa_register (r52) - { - /* Point sp at base of ABI area; point r4 to the caller-sp word. */ - ADDI_PTR sp, sp, -(2 * REGSIZE) - ADDI_PTR r4, sp, -REGSIZE - } - { - /* Save zero for caller sp in our 'caller' save area, and make - sure lr has a zero value, to limit backtraces. */ - move lr, zero - ST r4, zero - } - { - move r0, r52 - jal _dl_start - } - /* Save returned start of user program address for later. */ - move r50, r0 - - /* See if we were invoked explicitly with the dynamic loader, - in which case we have to adjust the argument vector. */ - lnk r51; .Llink: - pic_addr r4, _dl_skip_args - LD4U r4, r4 - BEQZT r4, .Lno_skip - - /* Load the argc word at the initial sp and adjust it. - We basically jump "sp" up over the first few argv entries - and write "argc" a little higher up in memory, to be the - base of the new kernel-initialized stack area. */ - LD_PTR r0, r52 - { - sub r0, r0, r4 - SHL_PTR_ADD r52, r4, r52 - } - { - ST_PTR r52, r0 - SHL_PTR_ADD sp, r4, sp - } - andi sp, sp, -8 - -.Lno_skip: - /* Call_dl_init (_dl_loaded, argc, argv, envp). See elf/start.s - for the layout of memory here; r52 is pointing to "+0". */ - pic_addr r0, _rtld_local - { - LD_PTR r1, r52 /* load argc in r1 */ - ADDLI_PTR r2, r52, __SIZEOF_POINTER__ /* point r2 at argv */ - } - { - LD_PTR r0, r0 /* yields _rtld_global._ns_loaded */ - addi r3, r1, 1 - move lr, zero - } - { - SHL_PTR_ADD r3, r3, r2 /* point r3 at envp */ - jal _dl_init_internal - } - - /* Call user program whose address we saved in r50. - We invoke it just like a static binary, but with _dl_fini - in r0 so we can distinguish. */ - - pic_addr r0, _dl_fini - move lr, zero - { - move sp, r52 - jr r50 - } - - /* Tell backtracer to give up (_start has no caller). */ - info 2 /* INFO_OP_CANNOT_BACKTRACE */ - -END (_start) |