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| author |   Maxim Kuvyrkov <maxim@codesourcery.com> | 2009-09-23 01:22:43 +0400 |
|---|---|---|
| committer |   Geert Uytterhoeven <geert@linux-m68k.org> | 2010-02-27 18:44:10 +0100 |
| commit | 00ebfe58b002f0ff387f60c7cd23bc2b274fce1a (patch) | |
| tree | 2e88877140ddcb97cf2b5a01bbf0b3c443bf3ef9 /arch/m68k/include | |
| parent | m68knommu: NPTL support for uClinux (diff) | |
| download | linux-dev-00ebfe58b002f0ff387f60c7cd23bc2b274fce1a.tar.xz linux-dev-00ebfe58b002f0ff387f60c7cd23bc2b274fce1a.zip | |
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>
Diffstat (limited to 'arch/m68k/include')
| -rw-r--r-- | arch/m68k/include/asm/sigcontext.h | 6 | ||||
| -rw-r--r-- | arch/m68k/include/asm/ucontext.h | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/sigcontext.h b/arch/m68k/include/asm/sigcontext.h index 523db2a51cf3..1320eaa4cc2a 100644 --- a/arch/m68k/include/asm/sigcontext.h +++ b/arch/m68k/include/asm/sigcontext.h @@ -15,9 +15,15 @@ struct sigcontext { unsigned long sc_pc; unsigned short sc_formatvec; #ifndef __uClinux__ +# ifdef __mcoldfire__ + unsigned long sc_fpregs[2][2]; /* room for two fp registers */ + unsigned long sc_fpcntl[3]; + unsigned char sc_fpstate[16+6*8]; +# else unsigned long sc_fpregs[2*3]; /* room for two fp registers */ unsigned long sc_fpcntl[3]; unsigned char sc_fpstate[216]; +# endif #endif }; diff --git a/arch/m68k/include/asm/ucontext.h b/arch/m68k/include/asm/ucontext.h index e4e22669edc0..00dcc5176c57 100644 --- a/arch/m68k/include/asm/ucontext.h +++ b/arch/m68k/include/asm/ucontext.h @@ -7,7 +7,11 @@ typedef greg_t gregset_t[NGREG]; 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 { |