m68k: Define sigcontext ABI of ColdFire
The following patch defines sigcontext ABI of ColdFire. Due to ISA
restrictions ColdFire needs different rt_sigreturn trampoline.
And due to ColdFire FP registers being 8-bytes instead of 12-bytes on
m68k, sigcontext and fpregset structures should be updated.
Regarding the sc_fpstate[16+6*8] field, it would've been enough 16
bytes to store ColdFire's FP state. To accomodate GLIBC's libSegFault
it would'be been enough 6*8 bytes (room for the 6 non-call-clobbered
FP registers). I set it to 16+6*8 to provide some extra space for any
future changes in the ColdFire FPU.
Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/include/asm/ucontext.h b/arch/m68k/include/asm/ucontext.h
index e4e2266..00dcc51 100644
--- a/arch/m68k/include/asm/ucontext.h
+++ b/arch/m68k/include/asm/ucontext.h
@@ -7,7 +7,11 @@
typedef struct fpregset {
int f_fpcntl[3];
+#ifdef __mcoldfire__
+ int f_fpregs[8][2];
+#else
int f_fpregs[8*3];
+#endif
} fpregset_t;
struct mcontext {