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/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  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 <linux/const.h>
#include <uapi/asm/ptrace.h>

#define PIF_SYSCALL		0	/* inside a system call */
#define PIF_PER_TRAP		1	/* deliver sigtrap on return to user */
#define PIF_SYSCALL_RESTART	2	/* restart the current system call */
#define PIF_GUEST_FAULT		3	/* indicates program check in sie64a */

#define _PIF_SYSCALL		_BITUL(PIF_SYSCALL)
#define _PIF_PER_TRAP		_BITUL(PIF_PER_TRAP)
#define _PIF_SYSCALL_RESTART	_BITUL(PIF_SYSCALL_RESTART)
#define _PIF_GUEST_FAULT	_BITUL(PIF_GUEST_FAULT)

#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)

struct psw_bits {
	unsigned long	     :	1;
	unsigned long per    :	1; /* PER-Mask */
	unsigned long	     :	3;
	unsigned long dat    :	1; /* DAT Mode */
	unsigned long io     :	1; /* Input/Output Mask */
	unsigned long ext    :	1; /* External Mask */
	unsigned long key    :	4; /* PSW Key */
	unsigned long	     :	1;
	unsigned long mcheck :	1; /* Machine-Check Mask */
	unsigned long wait   :	1; /* Wait State */
	unsigned long pstate :	1; /* Problem State */
	unsigned long as     :	2; /* Address Space Control */
	unsigned long cc     :	2; /* Condition Code */
	unsigned long pm     :	4; /* Program Mask */
	unsigned long ri     :	1; /* Runtime Instrumentation */
	unsigned long	     :	6;
	unsigned long eaba   :	2; /* Addressing Mode */
	unsigned long	     : 31;
	unsigned long ia     : 64; /* Instruction Address */
};

enum {
	PSW_BITS_AMODE_24BIT = 0,
	PSW_BITS_AMODE_31BIT = 1,
	PSW_BITS_AMODE_64BIT = 3
};

enum {
	PSW_BITS_AS_PRIMARY	= 0,
	PSW_BITS_AS_ACCREG	= 1,
	PSW_BITS_AS_SECONDARY	= 2,
	PSW_BITS_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.
 */
struct pt_regs 
{
	union {
		user_pt_regs user_regs;
		struct {
			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;
	unsigned long flags;
};

/*
 * 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

static inline void set_pt_regs_flag(struct pt_regs *regs, int flag)
{
	regs->flags |= (1UL << flag);
}

static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag)
{
	regs->flags &= ~(1UL << flag);
}

static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
{
	return !!(regs->flags & (1UL << flag));
}

/*
 * These are defined as per linux/ptrace.h, which see.
 */
#define arch_has_single_step()	(1)
#define arch_has_block_step()	(1)

#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr)
#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];
}

static inline void instruction_pointer_set(struct pt_regs *regs,
					   unsigned long val)
{
	regs->psw.addr = val;
}

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];
}

#endif /* __ASSEMBLY__ */
#endif /* _S390_PTRACE_H */

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Name Type Size Permission Actions
fpu Folder 0755
trace Folder 0755
Kbuild File 557 B 0644
airq.h File 3.02 KB 0644
alternative-asm.h File 3.07 KB 0644
alternative.h File 4.99 KB 0644
ap.h File 9.9 KB 0644
appldata.h File 1.54 KB 0644
archrandom.h File 1.1 KB 0644
asm-prototypes.h File 227 B 0644
atomic.h File 5.1 KB 0644
atomic_ops.h File 4.02 KB 0644
barrier.h File 1.84 KB 0644
bitops.h File 10.13 KB 0644
bug.h File 1.49 KB 0644
bugs.h File 441 B 0644
cache.h File 387 B 0644
ccwdev.h File 7.99 KB 0644
ccwgroup.h File 2.53 KB 0644
checksum.h File 3.24 KB 0644
chpid.h File 974 B 0644
cio.h File 8.01 KB 0644
clp.h File 1.32 KB 0644
cmb.h File 425 B 0644
cmpxchg.h File 1.76 KB 0644
compat.h File 7.9 KB 0644
cpacf.h File 16.8 KB 0644
cpcmd.h File 1.11 KB 0644
cpu.h File 549 B 0644
cpu_mf.h File 8.99 KB 0644
cpufeature.h File 963 B 0644
cputime.h File 805 B 0644
crw.h File 1.86 KB 0644
css_chars.h File 769 B 0644
ctl_reg.h File 2.89 KB 0644
current.h File 405 B 0644
debug.h File 8.1 KB 0644
delay.h File 721 B 0644
diag.h File 5.94 KB 0644
dis.h File 637 B 0644
dma-mapping.h File 621 B 0644
dma.h File 456 B 0644
eadm.h File 2.03 KB 0644
ebcdic.h File 1.41 KB 0644
elf.h File 10.36 KB 0644
exec.h File 269 B 0644
extable.h File 875 B 0644
extmem.h File 804 B 0644
facility.h File 2.44 KB 0644
fcx.h File 7.91 KB 0644
ftrace.h File 1.66 KB 0644
futex.h File 2.07 KB 0644
gmap.h File 4.93 KB 0644
hardirq.h File 670 B 0644
hugetlb.h File 2.82 KB 0644
hw_irq.h File 249 B 0644
idals.h File 5.22 KB 0644
idle.h File 709 B 0644
io.h File 2.03 KB 0644
ipl.h File 3.6 KB 0644
irq.h File 2.55 KB 0644
irqflags.h File 1.76 KB 0644
isc.h File 1000 B 0644
itcw.h File 950 B 0644
jump_label.h File 1.36 KB 0644
kdebug.h File 386 B 0644
kexec.h File 1.32 KB 0644
kprobes.h File 2.24 KB 0644
kvm_host.h File 22.24 KB 0644
kvm_para.h File 5.78 KB 0644
linkage.h File 633 B 0644
livepatch.h File 461 B 0644
lowcore.h File 6.29 KB 0644
mmu.h File 1.19 KB 0644
mmu_context.h File 3.84 KB 0644
mmzone.h File 316 B 0644
module.h File 802 B 0644
nmi.h File 3.44 KB 0644
nospec-branch.h File 342 B 0644
nospec-insn.h File 3.81 KB 0644
numa.h File 730 B 0644
os_info.h File 1.1 KB 0644
page-states.h File 486 B 0644
page.h File 5.12 KB 0644
pci.h File 6.26 KB 0644
pci_clp.h File 4.25 KB 0644
pci_debug.h File 608 B 0644
pci_dma.h File 5.7 KB 0644
pci_insn.h File 2.59 KB 0644
pci_io.h File 4.58 KB 0644
percpu.h File 6.43 KB 0644
perf_event.h File 2.71 KB 0644
pgalloc.h File 4.32 KB 0644
pgtable.h File 47.7 KB 0644
pkey.h File 4.23 KB 0644
preempt.h File 3.25 KB 0644
processor.h File 10.42 KB 0644
ptrace.h File 5.27 KB 0644
qdio.h File 11.67 KB 0644
reset.h File 471 B 0644
runtime_instr.h File 1.76 KB 0644
schid.h File 525 B 0644
sclp.h File 3.38 KB 0644
scsw.h File 24.1 KB 0644
seccomp.h File 516 B 0644
sections.h File 155 B 0644
segment.h File 93 B 0644
serial.h File 147 B 0644
set_memory.h File 779 B 0644
setup.h File 4.44 KB 0644
shmparam.h File 285 B 0644
signal.h File 644 B 0644
sigp.h File 1.8 KB 0644
smp.h File 2.45 KB 0644
sparsemem.h File 214 B 0644
spinlock.h File 3.53 KB 0644
spinlock_types.h File 437 B 0644
stp.h File 1.26 KB 0644
string.h File 4.5 KB 0644
switch_to.h File 1.37 KB 0644
syscall.h File 2.63 KB 0644
sysinfo.h File 4.22 KB 0644
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thread_info.h File 3.15 KB 0644
timex.h File 6.15 KB 0644
tlb.h File 5.71 KB 0644
tlbflush.h File 3.52 KB 0644
topology.h File 2.69 KB 0644
uaccess.h File 6.57 KB 0644
unistd.h File 1.03 KB 0644
uprobes.h File 588 B 0644
user.h File 3.3 KB 0644
vdso.h File 1.8 KB 0644
vga.h File 170 B 0644
vtime.h File 182 B 0644
vtimer.h File 866 B 0644
vx-insn.h File 10.66 KB 0644
xor.h File 454 B 0644