1 files changed, 162 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
new file mode 100644
index 000000000..d1419e669
--- /dev/null
+++ b/arch/sparc/include/asm/ptrace.h
@@ -0,0 +1,162 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SPARC_PTRACE_H
+#define __SPARC_PTRACE_H
+
+#include <uapi/asm/ptrace.h>
+
+#if defined(__sparc__) && defined(__arch64__)
+#ifndef __ASSEMBLY__
+
+#include <linux/compiler.h>
+#include <linux/threads.h>
+#include <asm/switch_to.h>
+
+static inline int pt_regs_trap_type(struct pt_regs *regs)
+{
+	return regs->magic & 0x1ff;
+}
+
+static inline bool pt_regs_is_syscall(struct pt_regs *regs)
+{
+	return (regs->tstate & TSTATE_SYSCALL);
+}
+
+static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
+{
+	return (regs->tstate &= ~TSTATE_SYSCALL);
+}
+
+#define arch_ptrace_stop_needed() \
+({	flush_user_windows(); \
+	get_thread_wsaved() != 0; \
+})
+
+#define arch_ptrace_stop() \
+	synchronize_user_stack()
+
+#define current_pt_regs() \
+	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
+struct global_reg_snapshot {
+	unsigned long		tstate;
+	unsigned long		tpc;
+	unsigned long		tnpc;
+	unsigned long		o7;
+	unsigned long		i7;
+	unsigned long		rpc;
+	struct thread_info	*thread;
+	unsigned long		pad1;
+};
+
+struct global_pmu_snapshot {
+	unsigned long		pcr[4];
+	unsigned long		pic[4];
+};
+
+union global_cpu_snapshot {
+	struct global_reg_snapshot	reg;
+	struct global_pmu_snapshot	pmu;
+};
+
+extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
+
+#define force_successful_syscall_return() set_thread_noerror(1)
+#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
+#define instruction_pointer(regs) ((regs)->tpc)
+#define instruction_pointer_set(regs, val) do { \
+		(regs)->tpc = (val); \
+		(regs)->tnpc = (val)+4; \
+	} while (0)
+#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
+static inline int is_syscall_success(struct pt_regs *regs)
+{
+	return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
+}
+
+static inline long regs_return_value(struct pt_regs *regs)
+{
+	return regs->u_regs[UREG_I0];
+}
+#ifdef CONFIG_SMP
+unsigned long profile_pc(struct pt_regs *);
+#else
+#define profile_pc(regs) instruction_pointer(regs)
+#endif
+
+#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
+
+int regs_query_register_offset(const char *name);
+unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
+
+/**
+ * regs_get_register() - get register value from its offset
+ * @regs:	pt_regs from which register value is gotten
+ * @offset:	offset number of the register.
+ *
+ * regs_get_register returns the value of a register whose
+ * offset from @regs. The @offset is the offset of the register
+ * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
+ * this returns 0.
+ */
+static inline unsigned long regs_get_register(struct pt_regs *regs,
+					     unsigned long offset)
+{
+	if (unlikely(offset >= MAX_REG_OFFSET))
+		return 0;
+	if (offset == PT_V9_Y)
+		return *(unsigned int *)((unsigned long)regs + offset);
+	return *(unsigned long *)((unsigned long)regs + offset);
+}
+
+/* Valid only for Kernel mode traps. */
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+	return regs->u_regs[UREG_I6];
+}
+#else /* __ASSEMBLY__ */
+#endif /* __ASSEMBLY__ */
+#else /* (defined(__sparc__) && defined(__arch64__)) */
+#ifndef __ASSEMBLY__
+#include <asm/switch_to.h>
+
+static inline bool pt_regs_is_syscall(struct pt_regs *regs)
+{
+	return (regs->psr & PSR_SYSCALL);
+}
+
+static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
+{
+	return (regs->psr &= ~PSR_SYSCALL);
+}
+
+#define arch_ptrace_stop_needed() \
+({	flush_user_windows(); \
+	current_thread_info()->w_saved != 0;	\
+})
+
+#define arch_ptrace_stop() \
+	synchronize_user_stack()
+
+#define current_pt_regs() \
+	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
+#define user_mode(regs) (!((regs)->psr & PSR_PS))
+#define instruction_pointer(regs) ((regs)->pc)
+#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
+unsigned long profile_pc(struct pt_regs *);
+#else /* (!__ASSEMBLY__) */
+#endif /* (!__ASSEMBLY__) */
+#endif /* (defined(__sparc__) && defined(__arch64__)) */
+#define STACK_BIAS		2047
+
+/* global_reg_snapshot offsets */
+#define GR_SNAP_TSTATE	0x00
+#define GR_SNAP_TPC	0x08
+#define GR_SNAP_TNPC	0x10
+#define GR_SNAP_O7	0x18
+#define GR_SNAP_I7	0x20
+#define GR_SNAP_RPC	0x28
+#define GR_SNAP_THREAD	0x30
+#define GR_SNAP_PAD1	0x38
+
+#endif /* !(__SPARC_PTRACE_H) */