e258d719ff
Simplify the uaccess code by removing the user_mode=home option. The kernel will now always run in the home space mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
|
|
* S390 version
|
|
* Copyright IBM Corp. 1999, 2000
|
|
* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
|
|
*/
|
|
#ifndef _S390_PTRACE_H
|
|
#define _S390_PTRACE_H
|
|
|
|
#include <uapi/asm/ptrace.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
|
|
PSW_MASK_EA | PSW_MASK_BA)
|
|
#define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
|
|
PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
|
|
PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
|
|
|
|
/*
|
|
* The pt_regs struct defines the way the registers are stored on
|
|
* the stack during a system call.
|
|
*/
|
|
struct pt_regs
|
|
{
|
|
unsigned long args[1];
|
|
psw_t psw;
|
|
unsigned long gprs[NUM_GPRS];
|
|
unsigned long orig_gpr2;
|
|
unsigned int int_code;
|
|
unsigned int int_parm;
|
|
unsigned long int_parm_long;
|
|
};
|
|
|
|
/*
|
|
* Program event recording (PER) register set.
|
|
*/
|
|
struct per_regs {
|
|
unsigned long control; /* PER control bits */
|
|
unsigned long start; /* PER starting address */
|
|
unsigned long end; /* PER ending address */
|
|
};
|
|
|
|
/*
|
|
* PER event contains information about the cause of the last PER exception.
|
|
*/
|
|
struct per_event {
|
|
unsigned short cause; /* PER code, ATMID and AI */
|
|
unsigned long address; /* PER address */
|
|
unsigned char paid; /* PER access identification */
|
|
};
|
|
|
|
/*
|
|
* Simplified per_info structure used to decode the ptrace user space ABI.
|
|
*/
|
|
struct per_struct_kernel {
|
|
unsigned long cr9; /* PER control bits */
|
|
unsigned long cr10; /* PER starting address */
|
|
unsigned long cr11; /* PER ending address */
|
|
unsigned long bits; /* Obsolete software bits */
|
|
unsigned long starting_addr; /* User specified start address */
|
|
unsigned long ending_addr; /* User specified end address */
|
|
unsigned short perc_atmid; /* PER trap ATMID */
|
|
unsigned long address; /* PER trap instruction address */
|
|
unsigned char access_id; /* PER trap access identification */
|
|
};
|
|
|
|
#define PER_EVENT_MASK 0xEB000000UL
|
|
|
|
#define PER_EVENT_BRANCH 0x80000000UL
|
|
#define PER_EVENT_IFETCH 0x40000000UL
|
|
#define PER_EVENT_STORE 0x20000000UL
|
|
#define PER_EVENT_STORE_REAL 0x08000000UL
|
|
#define PER_EVENT_TRANSACTION_END 0x02000000UL
|
|
#define PER_EVENT_NULLIFICATION 0x01000000UL
|
|
|
|
#define PER_CONTROL_MASK 0x00e00000UL
|
|
|
|
#define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
|
|
#define PER_CONTROL_SUSPENSION 0x00400000UL
|
|
#define PER_CONTROL_ALTERATION 0x00200000UL
|
|
|
|
/*
|
|
* These are defined as per linux/ptrace.h, which see.
|
|
*/
|
|
#define arch_has_single_step() (1)
|
|
|
|
#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
|
|
#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
|
|
#define user_stack_pointer(regs)((regs)->gprs[15])
|
|
#define profile_pc(regs) instruction_pointer(regs)
|
|
|
|
static inline long regs_return_value(struct pt_regs *regs)
|
|
{
|
|
return regs->gprs[2];
|
|
}
|
|
|
|
int regs_query_register_offset(const char *name);
|
|
const char *regs_query_register_name(unsigned int offset);
|
|
unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
|
|
unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
|
|
|
|
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
|
|
{
|
|
return regs->gprs[15] & PSW_ADDR_INSN;
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* _S390_PTRACE_H */
|