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Commit 137f6f3e authored by Ralf Baechle's avatar Ralf Baechle
Browse files

MIPS: Cleanup signal code initialization 



Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/709/
parent 69f3a7de

arch/mips/include/asm/fpu.h

+0 −8
Original line number Diff line number Diff line
@@ -28,15 +28,7 @@ 
struct sigcontext;

struct sigcontext32;



extern asmlinkage int (*save_fp_context)(struct sigcontext __user *sc);

extern asmlinkage int (*restore_fp_context)(struct sigcontext __user *sc);



extern asmlinkage int (*save_fp_context32)(struct sigcontext32 __user *sc);

extern asmlinkage int (*restore_fp_context32)(struct sigcontext32 __user *sc);



extern void fpu_emulator_init_fpu(void);

extern int fpu_emulator_save_context(struct sigcontext __user *sc);

extern int fpu_emulator_restore_context(struct sigcontext __user *sc);

extern void _init_fpu(void);

extern void _save_fp(struct task_struct *);

extern void _restore_fp(struct task_struct *);

arch/mips/kernel/signal.c

+46 −0
Original line number Diff line number Diff line
@@ -35,6 +35,15 @@ 


#include "signal-common.h"



static int (*save_fp_context)(struct sigcontext __user *sc);

static int (*restore_fp_context)(struct sigcontext __user *sc);



extern asmlinkage int _save_fp_context(struct sigcontext __user *sc);

extern asmlinkage int _restore_fp_context(struct sigcontext __user *sc);



extern asmlinkage int fpu_emulator_save_context(struct sigcontext __user *sc);

extern asmlinkage int fpu_emulator_restore_context(struct sigcontext __user *sc);



/*

 * Horribly complicated - with the bloody RM9000 workarounds enabled

 * the signal trampolines is moving to the end of the structure so we can
@@ -709,3 +718,40 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused, 
			key_replace_session_keyring();

	}

}



#ifdef CONFIG_SMP

static int smp_save_fp_context(struct sigcontext __user *sc)

{

	return raw_cpu_has_fpu

	       ? _save_fp_context(sc)

	       : fpu_emulator_save_context(sc);

}



static int smp_restore_fp_context(struct sigcontext __user *sc)

{

	return raw_cpu_has_fpu

	       ? _restore_fp_context(sc)

	       : fpu_emulator_restore_context(sc);

}

#endif



static int signal_setup(void)

{

#ifdef CONFIG_SMP

	/* For now just do the cpu_has_fpu check when the functions are invoked */

	save_fp_context = smp_save_fp_context;

	restore_fp_context = smp_restore_fp_context;

#else

	if (cpu_has_fpu) {

		save_fp_context = _save_fp_context;

		restore_fp_context = _restore_fp_context;

	} else {

		save_fp_context = fpu_emulator_save_context;

		restore_fp_context = fpu_emulator_restore_context;

	}

#endif



	return 0;

}



arch_initcall(signal_setup);

arch/mips/kernel/signal32.c

+24 −0
Original line number Diff line number Diff line
@@ -35,6 +35,15 @@ 


#include "signal-common.h"



static int (*save_fp_context32)(struct sigcontext32 __user *sc);

static int (*restore_fp_context32)(struct sigcontext32 __user *sc);



extern asmlinkage int _save_fp_context32(struct sigcontext32 __user *sc);

extern asmlinkage int _restore_fp_context32(struct sigcontext32 __user *sc);



extern asmlinkage int fpu_emulator_save_context32(struct sigcontext32 __user *sc);

extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user *sc);



/*

 * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...

 */
@@ -828,3 +837,18 @@ SYSCALL_DEFINE5(32_waitid, int, which, compat_pid_t, pid, 
	info.si_code |= __SI_CHLD;

	return copy_siginfo_to_user32(uinfo, &info);

}



static int signal32_init(void)

{

	if (cpu_has_fpu) {

		save_fp_context32 = _save_fp_context32;

		restore_fp_context32 = _restore_fp_context32;

	} else {

		save_fp_context32 = fpu_emulator_save_context32;

		restore_fp_context32 = fpu_emulator_restore_context32;

	}



	return 0;

}



arch_initcall(signal32_init);

arch/mips/kernel/traps.c

+0 −76
Original line number Diff line number Diff line
@@ -1395,77 +1395,6 @@ void *set_vi_handler(int n, vi_handler_t addr) 
	return set_vi_srs_handler(n, addr, 0);

}



/*

 * This is used by native signal handling

 */

asmlinkage int (*save_fp_context)(struct sigcontext __user *sc);

asmlinkage int (*restore_fp_context)(struct sigcontext __user *sc);



extern asmlinkage int _save_fp_context(struct sigcontext __user *sc);

extern asmlinkage int _restore_fp_context(struct sigcontext __user *sc);



extern asmlinkage int fpu_emulator_save_context(struct sigcontext __user *sc);

extern asmlinkage int fpu_emulator_restore_context(struct sigcontext __user *sc);



#ifdef CONFIG_SMP

static int smp_save_fp_context(struct sigcontext __user *sc)

{

	return raw_cpu_has_fpu

	       ? _save_fp_context(sc)

	       : fpu_emulator_save_context(sc);

}



static int smp_restore_fp_context(struct sigcontext __user *sc)

{

	return raw_cpu_has_fpu

	       ? _restore_fp_context(sc)

	       : fpu_emulator_restore_context(sc);

}

#endif



static inline void signal_init(void)

{

#ifdef CONFIG_SMP

	/* For now just do the cpu_has_fpu check when the functions are invoked */

	save_fp_context = smp_save_fp_context;

	restore_fp_context = smp_restore_fp_context;

#else

	if (cpu_has_fpu) {

		save_fp_context = _save_fp_context;

		restore_fp_context = _restore_fp_context;

	} else {

		save_fp_context = fpu_emulator_save_context;

		restore_fp_context = fpu_emulator_restore_context;

	}

#endif

}



#ifdef CONFIG_MIPS32_COMPAT



/*

 * This is used by 32-bit signal stuff on the 64-bit kernel

 */

asmlinkage int (*save_fp_context32)(struct sigcontext32 __user *sc);

asmlinkage int (*restore_fp_context32)(struct sigcontext32 __user *sc);



extern asmlinkage int _save_fp_context32(struct sigcontext32 __user *sc);

extern asmlinkage int _restore_fp_context32(struct sigcontext32 __user *sc);



extern asmlinkage int fpu_emulator_save_context32(struct sigcontext32 __user *sc);

extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user *sc);



static inline void signal32_init(void)

{

	if (cpu_has_fpu) {

		save_fp_context32 = _save_fp_context32;

		restore_fp_context32 = _restore_fp_context32;

	} else {

		save_fp_context32 = fpu_emulator_save_context32;

		restore_fp_context32 = fpu_emulator_restore_context32;

	}

}

#endif



extern void cpu_cache_init(void);

extern void tlb_init(void);

extern void flush_tlb_handlers(void);
@@ -1779,11 +1708,6 @@ void __init trap_init(void) 
	else

		memcpy((void *)(ebase + 0x080), &except_vec3_generic, 0x80);



	signal_init();

#ifdef CONFIG_MIPS32_COMPAT

	signal32_init();

#endif



	local_flush_icache_range(ebase, ebase + 0x400);

	flush_tlb_handlers();