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nds32: standalone support

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Add standalone program related support for nds32 architecture.

Signed-off-by: Macpaul Lin <macpaul@andestech.com>
This commit is contained in:
Macpaul Lin 2011-10-11 22:33:20 +00:00 committed by Wolfgang Denk
parent 463d47f66c
commit 72c73ddec3
3 changed files with 85 additions and 1 deletions
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56
examples/standalone/nds32.lds Normal file
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@ -0,0 +1,56 @@
/*
* Copyright (C) 2011 Andes Technology Corporation
* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
OUTPUT_FORMAT("elf32-nds32", "elf32-nds32", "elf32-nds32")
OUTPUT_ARCH(nds32)
ENTRY(_start)
SECTIONS
{
. = ALIGN(4);
.text :
{
*(.text)
}
. = ALIGN(4);
.data : { *(.data) }
. = ALIGN(4);
.got : {
__got_start = .;
*(.got)
__got_end = .;
}
. = ALIGN(4);
__bss_start = .;
.bss : { *(.bss) }
__bss_end = .;
. = ALIGN(4);
.rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
_end = .;
}

17
examples/standalone/stubs.c
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@ -167,8 +167,23 @@ gd_t *global_data;
" jmp %%g1\n" \
" nop\n" \
: : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "g1" );
#elif defined(CONFIG_NDS32)
/*
* r16 holds the pointer to the global_data. gp is call clobbered.
* not support reduced register (16 GPR).
*/
#define EXPORT_FUNC(x) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" lwi $r16, [$gp + (%0)]\n" \
" lwi $r16, [$r16 + (%1)]\n" \
" jr $r16\n" \
: : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "$r16");
#else
/*" addi $sp, $sp, -24\n" \
" br $r16\n" \*/
#error stubs definition missing for this architecture
#endif

13
examples/standalone/x86-testapp.c
View File

@ -52,6 +52,17 @@ asm volatile ( \
" lw $25, %1($25)\n" \
" jr $25\n" \
: : "i"(offsetof(xxx_t, pfunc)), "i"(XF_ ## x * sizeof(void *)) : "t9");
#elif defined(__nds32__)
#define EXPORT_FUNC(x) \
asm volatile ( \
" .globl mon_" #x "\n" \
"mon_" #x ":\n" \
" lwi $r16, [$gp + (%0)]\n" \
" lwi $r16, [$r16 + (%1)]\n" \
" jr $r16\n" \
: : "i"(offsetof(xxx_t, pfunc)), \
"i"(XF_ ## x * sizeof(void *)) : "$r16");
#else
#error [No stub code for this arch]
#endif
@ -72,6 +83,8 @@ int main(void)
register volatile xxx_t *pq asm("r8");
#elif defined(__mips__)
register volatile xxx_t *pq asm("k0");
#elif defined(__nds32__)
register volatile xxx_t *pq asm("$r16");
#endif
char buf[32];