Commit bb1a773d authored by Al Viro's avatar Al Viro
Browse files

kill unused dump_fpu() instances 



dump_fpu() is used only on the architectures that support elf
and have neither CORE_DUMP_USE_REGSET nor ELF_CORE_COPY_FPREGS
defined.

Currently that's csky, m68k, microblaze, nds32 and unicore32.  The rest
of the instances are dead code.

NB: THIS MUST GO AFTER ELF_FDPIC CONVERSION

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 5d2c56ec

arch/arc/kernel/process.c

+0 −5
Original line number Diff line number Diff line
@@ -295,11 +295,6 @@ void flush_thread(void) 
{

}



int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)

{

	return 0;

}



int elf_check_arch(const struct elf32_hdr *x)

{

	unsigned int eflags;

arch/arm/kernel/process.c

+0 −15
Original line number Diff line number Diff line
@@ -282,21 +282,6 @@ int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs) 
	return 1;

}



/*

 * fill in the fpe structure for a core dump...

 */

int dump_fpu (struct pt_regs *regs, struct user_fp *fp)

{

	struct thread_info *thread = current_thread_info();

	int used_math = thread->used_cp[1] | thread->used_cp[2];



	if (used_math)

		memcpy(fp, &thread->fpstate.soft, sizeof (*fp));



	return used_math != 0;

}

EXPORT_SYMBOL(dump_fpu);



unsigned long get_wchan(struct task_struct *p)

{

	struct stackframe frame;

arch/hexagon/kernel/process.c

+0 −9
Original line number Diff line number Diff line
@@ -153,15 +153,6 @@ unsigned long get_wchan(struct task_struct *p) 
	return 0;

}



/*

 * Required placeholder.

 */

int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)

{

	return 0;

}





/*

 * Called on the exit path of event entry; see vm_entry.S

 *

arch/ia64/kernel/process.c

+0 −34
Original line number Diff line number Diff line
@@ -514,52 +514,18 @@ do_copy_task_regs (struct task_struct *task, struct unw_frame_info *info, void * 
	unw_get_ar(info, UNW_AR_SSD, &dst[56]);

}



void

do_dump_task_fpu (struct task_struct *task, struct unw_frame_info *info, void *arg)

{

	elf_fpreg_t *dst = arg;

	int i;



	memset(dst, 0, sizeof(elf_fpregset_t));	/* don't leak any "random" bits */



	if (unw_unwind_to_user(info) < 0)

		return;



	/* f0 is 0.0, f1 is 1.0 */



	for (i = 2; i < 32; ++i)

		unw_get_fr(info, i, dst + i);



	ia64_flush_fph(task);

	if ((task->thread.flags & IA64_THREAD_FPH_VALID) != 0)

		memcpy(dst + 32, task->thread.fph, 96*16);

}



void

do_copy_regs (struct unw_frame_info *info, void *arg)

{

	do_copy_task_regs(current, info, arg);

}



void

do_dump_fpu (struct unw_frame_info *info, void *arg)

{

	do_dump_task_fpu(current, info, arg);

}



void

ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)

{

	unw_init_running(do_copy_regs, dst);

}



int

dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)

{

	unw_init_running(do_dump_fpu, dst);

	return 1;	/* f0-f31 are always valid so we always return 1 */

}



/*

 * Flush thread state.  This is called when a thread does an execve().

 */

arch/nios2/kernel/process.c

+0 −8
Original line number Diff line number Diff line
@@ -251,11 +251,3 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) 
	regs->ea = pc;

	regs->sp = sp;

}
 


#include <linux/elfcore.h>



/* Fill in the FPU structure for a core dump. */

int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)

{

	return 0; /* Nios2 has no FPU and thus no FPU registers */

}

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