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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-01-01 16:08:06 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 13:24:36 +0200 |
| commit | 1365632bdeb42e5e252566bb08c0d7d68640edd3 (patch) | |
| tree | ebeeb423dfe921afdcae02aa5f93bb6328d32aa9 /arch/s390/include/asm/ptrace.h | |
| parent | 280ef0f1f982e4bd9a22ee3627ca06dccde59a64 (diff) | |
| download | lwn-1365632bdeb42e5e252566bb08c0d7d68640edd3.tar.gz lwn-1365632bdeb42e5e252566bb08c0d7d68640edd3.zip | |
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: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ptrace.h')
| -rw-r--r-- | arch/s390/include/asm/ptrace.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h index f4783c0b7b43..6e7708f3d866 100644 --- a/arch/s390/include/asm/ptrace.h +++ b/arch/s390/include/asm/ptrace.h @@ -16,6 +16,50 @@ PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \ 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 stack during a system call. |