Add standalone program related support for nds32 architecture.
Signed-off-by: Macpaul Lin macpaul@andestech.com
Changes for v1-v6: - code clean up. Changes for v7-v11: - No change. Changes for v12: - clean up for linker script. Changes for v13: - No change. --- examples/standalone/nds32.lds | 56 +++++++++++++++++++++++++++++++++++++ examples/standalone/stubs.c | 17 ++++++++++- examples/standalone/x86-testapp.c | 12 ++++++++ 3 files changed, 84 insertions(+), 1 deletions(-) create mode 100644 examples/standalone/nds32.lds
diff --git a/examples/standalone/nds32.lds b/examples/standalone/nds32.lds new file mode 100644 index 0000000..50b4c4b --- /dev/null +++ b/examples/standalone/nds32.lds @@ -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 = .; +} diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c index 507d38c..11c7565 100644 --- a/examples/standalone/stubs.c +++ b/examples/standalone/stubs.c @@ -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
diff --git a/examples/standalone/x86-testapp.c b/examples/standalone/x86-testapp.c index e8603d9..a4ac6f8 100644 --- a/examples/standalone/x86-testapp.c +++ b/examples/standalone/x86-testapp.c @@ -52,6 +52,16 @@ 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 +82,8 @@ 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];