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Commit 1365632b authored by Heiko Carstens's avatar Heiko Carstens Committed by Christian Borntraeger
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s390/ptrace: add struct psw and accessor function 



Introduce a 'struct psw' which makes it easier to decode and test if
certain bits in a psw are set or are not set.
In addition also add a 'psw_bits()' helper define which allows to
directly modify and test a psw_t structure. E.g.

psw_t psw;
psw_bits(psw).t = 1; /* set dat bit */

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 280ef0f1

arch/s390/include/asm/ptrace.h

+44 −0
Original line number Original line Diff line number Diff line
@@ -16,6 +16,50 @@ 
			 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \

			 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \

			 PSW_MASK_PSTATE | PSW_ASC_PRIMARY)

			 PSW_MASK_PSTATE | PSW_ASC_PRIMARY)





struct psw_bits {

	unsigned long long	: 1;

	unsigned long long r	: 1; /* PER-Mask */

	unsigned long long	: 3;

	unsigned long long t	: 1; /* DAT Mode */

	unsigned long long i	: 1; /* Input/Output Mask */

	unsigned long long e	: 1; /* External Mask */

	unsigned long long key	: 4; /* PSW Key */

	unsigned long long	: 1;

	unsigned long long m	: 1; /* Machine-Check Mask */

	unsigned long long w	: 1; /* Wait State */

	unsigned long long p	: 1; /* Problem State */

	unsigned long long as	: 2; /* Address Space Control */

	unsigned long long cc	: 2; /* Condition Code */

	unsigned long long pm	: 4; /* Program Mask */

	unsigned long long ri	: 1; /* Runtime Instrumentation */

	unsigned long long	: 6;

	unsigned long long eaba : 2; /* Addressing Mode */

#ifdef CONFIG_64BIT

	unsigned long long	: 31;

	unsigned long long ia	: 64;/* Instruction Address */

#else

	unsigned long long ia	: 31;/* Instruction Address */

#endif

};



enum {

	PSW_AMODE_24BIT = 0,

	PSW_AMODE_31BIT = 1,

	PSW_AMODE_64BIT = 3

};



enum {

	PSW_AS_PRIMARY	 = 0,

	PSW_AS_ACCREG	 = 1,

	PSW_AS_SECONDARY = 2,

	PSW_AS_HOME	 = 3

};



#define psw_bits(__psw) (*({			\

	typecheck(psw_t, __psw);		\

	&(*(struct psw_bits *)(&(__psw)));	\

}))



/*

/*

 * The pt_regs struct defines the way the registers are stored on

 * The pt_regs struct defines the way the registers are stored on

 * the stack during a system call.

 * the stack during a system call.