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Commit a58f7534 authored by Maxim Kuvyrkov's avatar Maxim Kuvyrkov Committed by Geert Uytterhoeven
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m68knommu: NPTL support for uClinux 



Port syscalls for NPTL support to m68knommu.

Signed-off-by: default avatarMaxim Kuvyrkov <maxim@codesourcery.com>
Acked-by: default avatarGreg Ungerer <gerg@uclinux.org>
Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent 9674cdc7

arch/m68k/include/asm/thread_info_no.h

+1 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ struct thread_info { 
	unsigned long	   flags;		/* low level flags */

	int		   cpu;			/* cpu we're on */

	int		   preempt_count;	/* 0 => preemptable, <0 => BUG */

	unsigned long	   tp_value;		/* thread pointer */

	struct restart_block restart_block;

};

arch/m68knommu/kernel/process.c

+4 −0
Original line number Diff line number Diff line
@@ -221,6 +221,10 @@ int copy_thread(unsigned long clone_flags, 


	p->thread.usp = usp;

	p->thread.ksp = (unsigned long)childstack;



	if (clone_flags & CLONE_SETTLS)

		task_thread_info(p)->tp_value = regs->d5;



	/*

	 * Must save the current SFC/DFC value, NOT the value when

	 * the parent was last descheduled - RGH  10-08-96

arch/m68knommu/kernel/ptrace.c

+5 −0
Original line number Diff line number Diff line
@@ -319,6 +319,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) 
		}

#endif



	case PTRACE_GET_THREAD_AREA:

		ret = put_user(task_thread_info(child)->tp_value,

			       (unsigned long __user *)data);

		break;



		default:

			ret = -EIO;

			break;

arch/m68knommu/kernel/sys_m68k.c

+36 −0
Original line number Diff line number Diff line
@@ -190,3 +190,39 @@ int kernel_execve(const char *filename, char *const argv[], char *const envp[]) 
			: "d" (__a), "d" (__b), "d" (__c));

	return __res;

}



asmlinkage unsigned long sys_get_thread_area(void)

{

	return current_thread_info()->tp_value;

}



asmlinkage int sys_set_thread_area(unsigned long tp)

{

	current_thread_info()->tp_value = tp;

	return 0;

}



/* This syscall gets its arguments in A0 (mem), D2 (oldval) and

   D1 (newval).  */

asmlinkage int

sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5,

		      unsigned long __user * mem)

{

	struct mm_struct *mm = current->mm;

	unsigned long mem_value;



	down_read(&mm->mmap_sem);



	mem_value = *mem;

	if (mem_value == oldval)

		*mem = newval;



	up_read(&mm->mmap_sem);

	return mem_value;

}



asmlinkage int sys_atomic_barrier(void)

{

	/* no code needed for uniprocs */

	return 0;

}

arch/m68knommu/kernel/syscalltable.S

+4 −0
Original line number Diff line number Diff line
@@ -351,6 +351,10 @@ ENTRY(sys_call_table) 
	.long sys_pwritev		/* 330 */

	.long sys_rt_tgsigqueueinfo

	.long sys_perf_event_open

	.long sys_get_thread_area

	.long sys_set_thread_area

	.long sys_atomic_cmpxchg_32	/* 335 */

	.long sys_atomic_barrier



	.rept NR_syscalls-(.-sys_call_table)/4

		.long sys_ni_syscall