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The PTRACE_SINGLEBLOCK option is used to get control whenever the inferior has executed a successful branch. The PER option to implement block stepping is successful-branching event, bit 32 in the PER-event mask. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
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* S390 version
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* Copyright IBM Corp. 1999, 2000
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* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
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*/
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#ifndef _S390_PTRACE_H
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#define _S390_PTRACE_H
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#include <uapi/asm/ptrace.h>
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#ifndef __ASSEMBLY__
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#define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
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PSW_MASK_EA | PSW_MASK_BA)
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#define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
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PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
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PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
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/*
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* The pt_regs struct defines the way the registers are stored on
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* the stack during a system call.
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*/
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struct pt_regs
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{
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unsigned long args[1];
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psw_t psw;
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unsigned long gprs[NUM_GPRS];
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unsigned long orig_gpr2;
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unsigned int int_code;
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unsigned int int_parm;
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unsigned long int_parm_long;
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};
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/*
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* Program event recording (PER) register set.
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*/
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struct per_regs {
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unsigned long control; /* PER control bits */
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unsigned long start; /* PER starting address */
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unsigned long end; /* PER ending address */
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};
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/*
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* PER event contains information about the cause of the last PER exception.
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*/
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struct per_event {
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unsigned short cause; /* PER code, ATMID and AI */
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unsigned long address; /* PER address */
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unsigned char paid; /* PER access identification */
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};
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/*
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* Simplified per_info structure used to decode the ptrace user space ABI.
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*/
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struct per_struct_kernel {
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unsigned long cr9; /* PER control bits */
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unsigned long cr10; /* PER starting address */
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unsigned long cr11; /* PER ending address */
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unsigned long bits; /* Obsolete software bits */
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unsigned long starting_addr; /* User specified start address */
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unsigned long ending_addr; /* User specified end address */
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unsigned short perc_atmid; /* PER trap ATMID */
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unsigned long address; /* PER trap instruction address */
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unsigned char access_id; /* PER trap access identification */
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};
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#define PER_EVENT_MASK 0xEB000000UL
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#define PER_EVENT_BRANCH 0x80000000UL
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#define PER_EVENT_IFETCH 0x40000000UL
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#define PER_EVENT_STORE 0x20000000UL
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#define PER_EVENT_STORE_REAL 0x08000000UL
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#define PER_EVENT_TRANSACTION_END 0x02000000UL
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#define PER_EVENT_NULLIFICATION 0x01000000UL
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#define PER_CONTROL_MASK 0x00e00000UL
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#define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
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#define PER_CONTROL_SUSPENSION 0x00400000UL
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#define PER_CONTROL_ALTERATION 0x00200000UL
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/*
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* These are defined as per linux/ptrace.h, which see.
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*/
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#define arch_has_single_step() (1)
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#define arch_has_block_step() (1)
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#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
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#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
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#define user_stack_pointer(regs)((regs)->gprs[15])
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#define profile_pc(regs) instruction_pointer(regs)
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static inline long regs_return_value(struct pt_regs *regs)
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{
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return regs->gprs[2];
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}
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int regs_query_register_offset(const char *name);
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const char *regs_query_register_name(unsigned int offset);
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unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
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unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
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static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
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{
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return regs->gprs[15] & PSW_ADDR_INSN;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _S390_PTRACE_H */
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