Add standalone program related support for nds32 architecture.
Signed-off-by: Macpaul Lin <macp...@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 <nobuh...@andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macp...@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];
--
1.7.3.5
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