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Commit 9432a9ba authored by Franck Bui-Huu's avatar Franck Bui-Huu Committed by Ralf Baechle
Browse files

[MIPS] signal32: reduce {setup,restore}_sigcontext32 sizes 



This trivial changes should decrease a lot the size of these
2 functions.

Signed-off-by: default avatarFranck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 722bb63d

arch/mips/kernel/signal32.c

+97 −114
Original line number Diff line number Diff line
@@ -160,6 +160,103 @@ struct rt_sigframe32 { 


#endif	/* !ICACHE_REFILLS_WORKAROUND_WAR */



/*

 * sigcontext handlers

 */

static int setup_sigcontext32(struct pt_regs *regs,

			      struct sigcontext32 __user *sc)

{

	int err = 0;

	int i;



	err |= __put_user(regs->cp0_epc, &sc->sc_pc);

	err |= __put_user(regs->cp0_status, &sc->sc_status);



	err |= __put_user(0, &sc->sc_regs[0]);

	for (i = 1; i < 32; i++)

		err |= __put_user(regs->regs[i], &sc->sc_regs[i]);



	err |= __put_user(regs->hi, &sc->sc_mdhi);

	err |= __put_user(regs->lo, &sc->sc_mdlo);

	if (cpu_has_dsp) {

		err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);

		err |= __put_user(mfhi1(), &sc->sc_hi1);

		err |= __put_user(mflo1(), &sc->sc_lo1);

		err |= __put_user(mfhi2(), &sc->sc_hi2);

		err |= __put_user(mflo2(), &sc->sc_lo2);

		err |= __put_user(mfhi3(), &sc->sc_hi3);

		err |= __put_user(mflo3(), &sc->sc_lo3);

	}



	err |= __put_user(!!used_math(), &sc->sc_used_math);



	if (used_math()) {

		/*

		 * Save FPU state to signal context.  Signal handler

		 * will "inherit" current FPU state.

		 */

		preempt_disable();



		if (!is_fpu_owner()) {

			own_fpu();

			restore_fp(current);

		}

		err |= save_fp_context32(sc);



		preempt_enable();

	}

	return err;

}



static int restore_sigcontext32(struct pt_regs *regs,

				struct sigcontext32 __user *sc)

{

	u32 used_math;

	int err = 0;

	s32 treg;

	int i;



	/* Always make any pending restarted system calls return -EINTR */

	current_thread_info()->restart_block.fn = do_no_restart_syscall;



	err |= __get_user(regs->cp0_epc, &sc->sc_pc);

	err |= __get_user(regs->hi, &sc->sc_mdhi);

	err |= __get_user(regs->lo, &sc->sc_mdlo);

	if (cpu_has_dsp) {

		err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);

		err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);

		err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);

		err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);

		err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);

		err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);

		err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);

	}



	for (i = 1; i < 32; i++)

		err |= __get_user(regs->regs[i], &sc->sc_regs[i]);



	err |= __get_user(used_math, &sc->sc_used_math);

	conditional_used_math(used_math);



	preempt_disable();



	if (used_math()) {

		/* restore fpu context if we have used it before */

		own_fpu();

		err |= restore_fp_context32(sc);

	} else {

		/* signal handler may have used FPU.  Give it up. */

		lose_fpu();

	}



	preempt_enable();



	return err;

}



/*

 *

 */

extern void __put_sigset_unknown_nsig(void);

extern void __get_sigset_unknown_nsig(void);
@@ -347,63 +444,6 @@ asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs) 
	return ret;

}



static int restore_sigcontext32(struct pt_regs *regs, struct sigcontext32 __user *sc)

{

	u32 used_math;

	int err = 0;

	s32 treg;



	/* Always make any pending restarted system calls return -EINTR */

	current_thread_info()->restart_block.fn = do_no_restart_syscall;



	err |= __get_user(regs->cp0_epc, &sc->sc_pc);

	err |= __get_user(regs->hi, &sc->sc_mdhi);

	err |= __get_user(regs->lo, &sc->sc_mdlo);

	if (cpu_has_dsp) {

		err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);

		err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);

		err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);

		err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);

		err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);

		err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);

		err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);

	}



#define restore_gp_reg(i) do {						\

	err |= __get_user(regs->regs[i], &sc->sc_regs[i]);		\

} while(0)

	restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);

	restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);

	restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);

	restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);

	restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);

	restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);

	restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);

	restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);

	restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);

	restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);

	restore_gp_reg(31);

#undef restore_gp_reg



	err |= __get_user(used_math, &sc->sc_used_math);

	conditional_used_math(used_math);



	preempt_disable();



	if (used_math()) {

		/* restore fpu context if we have used it before */

		own_fpu();

		err |= restore_fp_context32(sc);

	} else {

		/* signal handler may have used FPU.  Give it up. */

		lose_fpu();

	}



	preempt_enable();



	return err;

}



int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)

{

	int err;
@@ -547,63 +587,6 @@ _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) 
	force_sig(SIGSEGV, current);

}



static inline int setup_sigcontext32(struct pt_regs *regs,

				     struct sigcontext32 __user *sc)

{

	int err = 0;



	err |= __put_user(regs->cp0_epc, &sc->sc_pc);

	err |= __put_user(regs->cp0_status, &sc->sc_status);



#define save_gp_reg(i) {						\

	err |= __put_user(regs->regs[i], &sc->sc_regs[i]);		\

} while(0)

	__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);

	save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);

	save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);

	save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);

	save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);

	save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);

	save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);

	save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);

	save_gp_reg(31);

#undef save_gp_reg



	err |= __put_user(regs->hi, &sc->sc_mdhi);

	err |= __put_user(regs->lo, &sc->sc_mdlo);

	if (cpu_has_dsp) {

		err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);

		err |= __put_user(mfhi1(), &sc->sc_hi1);

		err |= __put_user(mflo1(), &sc->sc_lo1);

		err |= __put_user(mfhi2(), &sc->sc_hi2);

		err |= __put_user(mflo2(), &sc->sc_lo2);

		err |= __put_user(mfhi3(), &sc->sc_hi3);

		err |= __put_user(mflo3(), &sc->sc_lo3);

	}



	err |= __put_user(!!used_math(), &sc->sc_used_math);



	if (!used_math())

		goto out;



	/*

	 * Save FPU state to signal context.  Signal handler will "inherit"

	 * current FPU state.

	 */

	preempt_disable();



	if (!is_fpu_owner()) {

		own_fpu();

		restore_fp(current);

	}

	err |= save_fp_context32(sc);



	preempt_enable();



out:

	return err;

}



int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,

	int signr, sigset_t *set)

{