From 0df01fd3d71481b5cc7aeea6a741b9fc3be15178 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Fri, 21 May 2010 11:08:03 +0800 Subject: 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 Signed-off-by: Scott McNutt --- examples/standalone/stubs.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'examples/standalone') diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c index ce3371d912..0187708e0b 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 -- cgit v1.2.1