diff options
| author | Thomas Chou <thomas@wytron.com.tw> | 2010-05-21 11:08:03 +0800 |
|---|---|---|
| committer | Scott McNutt <smcnutt@psyent.com> | 2010-05-28 10:56:03 -0400 |
| commit | 0df01fd3d71481b5cc7aeea6a741b9fc3be15178 (patch) | |
| tree | a5eb637453d7f400eb1f9709b376ad247905e265 /examples | |
| parent | 661ba14051db6766932fcb50ba1ec7c67f230054 (diff) | |
nios2: fix r15 issue for gcc4
The "-ffixed-r15" option doesn't work well for gcc4. Since we
don't use gp for small data with option "-G0", we can use gp
as global data pointer. This allows compiler to use r15. It
is necessary for gcc4 to work properly.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/standalone/stubs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c index ce3371d91..0187708e0 100644 --- a/examples/standalone/stubs.c +++ b/examples/standalone/stubs.c @@ -84,7 +84,7 @@ gd_t *global_data; : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x) : "r0"); #elif defined(CONFIG_NIOS2) /* - * r15 holds the pointer to the global_data, r8 is call-clobbered + * gp holds the pointer to the global_data, r8 is call-clobbered */ #define EXPORT_FUNC(x) \ asm volatile ( \ @@ -92,11 +92,11 @@ gd_t *global_data; #x ":\n" \ " movhi r8, %%hi(%0)\n" \ " ori r8, r0, %%lo(%0)\n" \ -" add r8, r8, r15\n" \ +" add r8, r8, gp\n" \ " ldw r8, 0(r8)\n" \ " ldw r8, %1(r8)\n" \ " jmp r8\n" \ - : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r15"); + : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "gp"); #elif defined(CONFIG_M68K) /* * d7 holds the pointer to the global_data, a0 is a call-clobbered |