+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 1998-2004 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- * Stephane Eranian <eranian@hpl.hp.com>
- * Copyright (C) 2003 Intel Co
- * Suresh Siddha <suresh.b.siddha@intel.com>
- * Fenghua Yu <fenghua.yu@intel.com>
- * Arun Sharma <arun.sharma@intel.com>
- *
- * 12/07/98 S. Eranian added pt_regs & switch_stack
- * 12/21/98 D. Mosberger updated to match latest code
- * 6/17/99 D. Mosberger added second unat member to "struct switch_stack"
- *
- */
-#ifndef _ASM_IA64_PTRACE_H
-#define _ASM_IA64_PTRACE_H
-
-#ifndef ASM_OFFSETS_C
-#include <asm/asm-offsets.h>
-#endif
-#include <uapi/asm/ptrace.h>
-
-/*
- * Base-2 logarithm of number of pages to allocate per task structure
- * (including register backing store and memory stack):
- */
-#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
-# define KERNEL_STACK_SIZE_ORDER 3
-#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
-# define KERNEL_STACK_SIZE_ORDER 2
-#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
-# define KERNEL_STACK_SIZE_ORDER 1
-#else
-# define KERNEL_STACK_SIZE_ORDER 0
-#endif
-
-#define IA64_RBS_OFFSET ((IA64_TASK_SIZE + IA64_THREAD_INFO_SIZE + 31) & ~31)
-#define IA64_STK_OFFSET ((1 << KERNEL_STACK_SIZE_ORDER)*PAGE_SIZE)
-
-#define KERNEL_STACK_SIZE IA64_STK_OFFSET
-
-#ifndef __ASSEMBLY__
-
-#include <asm/current.h>
-#include <asm/page.h>
-
-/*
- * We use the ia64_psr(regs)->ri to determine which of the three
- * instructions in bundle (16 bytes) took the sample. Generate
- * the canonical representation by adding to instruction pointer.
- */
-# define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri)
-# define instruction_pointer_set(regs, val) \
-({ \
- ia64_psr(regs)->ri = (val & 0xf); \
- regs->cr_iip = (val & ~0xfULL); \
-})
-
-static inline unsigned long user_stack_pointer(struct pt_regs *regs)
-{
- return regs->r12;
-}
-
-static inline int is_syscall_success(struct pt_regs *regs)
-{
- return regs->r10 != -1;
-}
-
-static inline long regs_return_value(struct pt_regs *regs)
-{
- if (is_syscall_success(regs))
- return regs->r8;
- else
- return -regs->r8;
-}
-
-/* Conserve space in histogram by encoding slot bits in address
- * bits 2 and 3 rather than bits 0 and 1.
- */
-#define profile_pc(regs) \
-({ \
- unsigned long __ip = instruction_pointer(regs); \
- (__ip & ~3UL) + ((__ip & 3UL) << 2); \
-})
-
- /* given a pointer to a task_struct, return the user's pt_regs */
-# define task_pt_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1)
-# define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr)
-# define user_mode(regs) (((struct ia64_psr *) &(regs)->cr_ipsr)->cpl != 0)
-# define user_stack(task,regs) ((long) regs - (long) task == IA64_STK_OFFSET - sizeof(*regs))
-# define fsys_mode(task,regs) \
- ({ \
- struct task_struct *_task = (task); \
- struct pt_regs *_regs = (regs); \
- !user_mode(_regs) && user_stack(_task, _regs); \
- })
-
- /*
- * System call handlers that, upon successful completion, need to return a negative value
- * should call force_successful_syscall_return() right before returning. On architectures
- * where the syscall convention provides for a separate error flag (e.g., alpha, ia64,
- * ppc{,64}, sparc{,64}, possibly others), this macro can be used to ensure that the error
- * flag will not get set. On architectures which do not support a separate error flag,
- * the macro is a no-op and the spurious error condition needs to be filtered out by some
- * other means (e.g., in user-level, by passing an extra argument to the syscall handler,
- * or something along those lines).
- *
- * On ia64, we can clear the user's pt_regs->r8 to force a successful syscall.
- */
-# define force_successful_syscall_return() (task_pt_regs(current)->r8 = 0)
-
- struct task_struct; /* forward decl */
- struct unw_frame_info; /* forward decl */
-
- extern unsigned long ia64_get_user_rbs_end (struct task_struct *, struct pt_regs *,
- unsigned long *);
- extern long ia64_peek (struct task_struct *, struct switch_stack *, unsigned long,
- unsigned long, long *);
- extern long ia64_poke (struct task_struct *, struct switch_stack *, unsigned long,
- unsigned long, long);
- extern void ia64_flush_fph (struct task_struct *);
- extern void ia64_sync_fph (struct task_struct *);
- extern void ia64_sync_krbs(void);
- extern long ia64_sync_user_rbs (struct task_struct *, struct switch_stack *,
- unsigned long, unsigned long);
-
- /* get nat bits for scratch registers such that bit N==1 iff scratch register rN is a NaT */
- extern unsigned long ia64_get_scratch_nat_bits (struct pt_regs *pt, unsigned long scratch_unat);
- /* put nat bits for scratch registers such that scratch register rN is a NaT iff bit N==1 */
- extern unsigned long ia64_put_scratch_nat_bits (struct pt_regs *pt, unsigned long nat);
-
- extern void ia64_increment_ip (struct pt_regs *pt);
- extern void ia64_decrement_ip (struct pt_regs *pt);
-
- extern void ia64_ptrace_stop(void);
- #define arch_ptrace_stop() \
- ia64_ptrace_stop()
- #define arch_ptrace_stop_needed() \
- (!test_thread_flag(TIF_RESTORE_RSE))
-
- #define arch_has_single_step() (1)
- #define arch_has_block_step() (1)
-
-#endif /* !__ASSEMBLY__ */
-#endif /* _ASM_IA64_PTRACE_H */
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