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-rw-r--r--arch/s390/include/asm/ptrace.h263
1 files changed, 263 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
new file mode 100644
index 0000000000..d28bf8fb27
--- /dev/null
+++ b/arch/s390/include/asm/ptrace.h
@@ -0,0 +1,263 @@
+/* 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/bits.h>
+#include <uapi/asm/ptrace.h>
+#include <asm/tpi.h>
+
+#define PIF_SYSCALL 0 /* inside a system call */
+#define PIF_EXECVE_PGSTE_RESTART 1 /* restart execve for PGSTE binaries */
+#define PIF_SYSCALL_RET_SET 2 /* return value was set via ptrace */
+#define PIF_GUEST_FAULT 3 /* indicates program check in sie64a */
+#define PIF_FTRACE_FULL_REGS 4 /* all register contents valid (ftrace) */
+
+#define _PIF_SYSCALL BIT(PIF_SYSCALL)
+#define _PIF_EXECVE_PGSTE_RESTART BIT(PIF_EXECVE_PGSTE_RESTART)
+#define _PIF_SYSCALL_RET_SET BIT(PIF_SYSCALL_RET_SET)
+#define _PIF_GUEST_FAULT BIT(PIF_GUEST_FAULT)
+#define _PIF_FTRACE_FULL_REGS BIT(PIF_FTRACE_FULL_REGS)
+
+#define PSW32_MASK_PER _AC(0x40000000, UL)
+#define PSW32_MASK_DAT _AC(0x04000000, UL)
+#define PSW32_MASK_IO _AC(0x02000000, UL)
+#define PSW32_MASK_EXT _AC(0x01000000, UL)
+#define PSW32_MASK_KEY _AC(0x00F00000, UL)
+#define PSW32_MASK_BASE _AC(0x00080000, UL) /* Always one */
+#define PSW32_MASK_MCHECK _AC(0x00040000, UL)
+#define PSW32_MASK_WAIT _AC(0x00020000, UL)
+#define PSW32_MASK_PSTATE _AC(0x00010000, UL)
+#define PSW32_MASK_ASC _AC(0x0000C000, UL)
+#define PSW32_MASK_CC _AC(0x00003000, UL)
+#define PSW32_MASK_PM _AC(0x00000f00, UL)
+#define PSW32_MASK_RI _AC(0x00000080, UL)
+
+#define PSW32_ADDR_AMODE _AC(0x80000000, UL)
+#define PSW32_ADDR_INSN _AC(0x7FFFFFFF, UL)
+
+#define PSW32_DEFAULT_KEY ((PAGE_DEFAULT_ACC) << 20)
+
+#define PSW32_ASC_PRIMARY _AC(0x00000000, UL)
+#define PSW32_ASC_ACCREG _AC(0x00004000, UL)
+#define PSW32_ASC_SECONDARY _AC(0x00008000, UL)
+#define PSW32_ASC_HOME _AC(0x0000C000, UL)
+
+#define PSW_DEFAULT_KEY ((PAGE_DEFAULT_ACC) << 52)
+
+#define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
+ PSW_MASK_EA | PSW_MASK_BA | PSW_MASK_DAT)
+#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)
+
+#ifndef __ASSEMBLY__
+
+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))); \
+}))
+
+typedef struct {
+ unsigned int mask;
+ unsigned int addr;
+} psw_t32 __aligned(8);
+
+#define PGM_INT_CODE_MASK 0x7f
+#define PGM_INT_CODE_PER 0x80
+
+/*
+ * 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;
+ union {
+ struct {
+ unsigned int int_code;
+ unsigned int int_parm;
+ unsigned long int_parm_long;
+ };
+ struct tpi_info tpi_info;
+ };
+ unsigned long flags;
+ unsigned long cr1;
+ unsigned long last_break;
+};
+
+/*
+ * 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));
+}
+
+static inline int test_and_clear_pt_regs_flag(struct pt_regs *regs, int flag)
+{
+ int ret = test_pt_regs_flag(regs, flag);
+
+ clear_pt_regs_flag(regs, flag);
+ return ret;
+}
+
+/*
+ * 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);
+
+/**
+ * regs_get_kernel_argument() - get Nth function argument in kernel
+ * @regs: pt_regs of that context
+ * @n: function argument number (start from 0)
+ *
+ * regs_get_kernel_argument() returns @n th argument of the function call.
+ */
+static inline unsigned long regs_get_kernel_argument(struct pt_regs *regs,
+ unsigned int n)
+{
+ unsigned int argoffset = STACK_FRAME_OVERHEAD / sizeof(long);
+
+#define NR_REG_ARGUMENTS 5
+ if (n < NR_REG_ARGUMENTS)
+ return regs_get_register(regs, 2 + n);
+ n -= NR_REG_ARGUMENTS;
+ return regs_get_kernel_stack_nth(regs, argoffset + n);
+}
+
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+ return regs->gprs[15];
+}
+
+static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
+{
+ regs->gprs[2] = rc;
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* _S390_PTRACE_H */