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#ifndef _ASM_IA64_PTRACE_H
#define _ASM_IA64_PTRACE_H
/*
* Copyright (C) 1998-2001 Hewlett-Packard Co
* Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 1998, 1999 Stephane Eranian <eranian@hpl.hp.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"
*
*/
/*
* When a user process is blocked, its state looks as follows:
*
* +----------------------+ ------- IA64_STK_OFFSET
* | | ^
* | struct pt_regs | |
* | | |
* +----------------------+ |
* | | |
* | memory stack | |
* | (growing downwards) | |
* //.....................// |
* |
* //.....................// |
* | | |
* +----------------------+ |
* | struct switch_stack | |
* | | |
* +----------------------+ |
* | | |
* //.....................// |
* |
* //.....................// |
* | | |
* | register stack | |
* | (growing upwards) | |
* | | |
* +----------------------+ | --- IA64_RBS_OFFSET
* | | | ^
* | struct task_struct | | |
* current -> | | | |
* +----------------------+ -------
*
* Note that ar.ec is not saved explicitly in pt_reg or switch_stack.
* This is because ar.ec is saved as part of ar.pfs.
*/
#include <linux/config.h>
#include <asm/fpu.h>
#include <asm/offsets.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 IA64_TASK_STRUCT_LOG_NUM_PAGES 3
#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
# define IA64_TASK_STRUCT_LOG_NUM_PAGES 2
#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
# define IA64_TASK_STRUCT_LOG_NUM_PAGES 1
#else
# define IA64_TASK_STRUCT_LOG_NUM_PAGES 0
#endif
#define IA64_RBS_OFFSET ((IA64_TASK_SIZE + 15) & ~15)
#define IA64_STK_OFFSET ((1 << IA64_TASK_STRUCT_LOG_NUM_PAGES)*PAGE_SIZE)
#define INIT_TASK_SIZE IA64_STK_OFFSET
#ifndef __ASSEMBLY__
#include <asm/current.h>
#include <asm/page.h>
/*
* This struct defines the way the registers are saved on system
* calls.
*
* We don't save all floating point register because the kernel
* is compiled to use only a very small subset, so the other are
* untouched.
*
* THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE
* (because the memory stack pointer MUST ALWAYS be aligned this way)
*
*/
struct pt_regs {
/* The following registers are saved by SAVE_MIN: */
unsigned long cr_ipsr; /* interrupted task's psr */
unsigned long cr_iip; /* interrupted task's instruction pointer */
unsigned long cr_ifs; /* interrupted task's function state */
unsigned long ar_unat; /* interrupted task's NaT register (preserved) */
unsigned long ar_pfs; /* prev function state */
unsigned long ar_rsc; /* RSE configuration */
/* The following two are valid only if cr_ipsr.cpl > 0: */
unsigned long ar_rnat; /* RSE NaT */
unsigned long ar_bspstore; /* RSE bspstore */
unsigned long pr; /* 64 predicate registers (1 bit each) */
unsigned long b6; /* scratch */
unsigned long loadrs; /* size of dirty partition << 16 */
unsigned long r1; /* the gp pointer */
unsigned long r2; /* scratch */
unsigned long r3; /* scratch */
unsigned long r12; /* interrupted task's memory stack pointer */
unsigned long r13; /* thread pointer */
unsigned long r14; /* scratch */
unsigned long r15; /* scratch */
unsigned long r8; /* scratch (return value register 0) */
unsigned long r9; /* scratch (return value register 1) */
unsigned long r10; /* scratch (return value register 2) */
unsigned long r11; /* scratch (return value register 3) */
/* The following registers are saved by SAVE_REST: */
unsigned long r16; /* scratch */
unsigned long r17; /* scratch */
unsigned long r18; /* scratch */
unsigned long r19; /* scratch */
unsigned long r20; /* scratch */
unsigned long r21; /* scratch */
unsigned long r22; /* scratch */
unsigned long r23; /* scratch */
unsigned long r24; /* scratch */
unsigned long r25; /* scratch */
unsigned long r26; /* scratch */
unsigned long r27; /* scratch */
unsigned long r28; /* scratch */
unsigned long r29; /* scratch */
unsigned long r30; /* scratch */
unsigned long r31; /* scratch */
unsigned long ar_ccv; /* compare/exchange value (scratch) */
unsigned long ar_fpsr; /* floating point status (preserved) */
unsigned long b0; /* return pointer (bp) */
unsigned long b7; /* scratch */
/*
* Floating point registers that the kernel considers
* scratch:
*/
struct ia64_fpreg f6; /* scratch */
struct ia64_fpreg f7; /* scratch */
struct ia64_fpreg f8; /* scratch */
struct ia64_fpreg f9; /* scratch */
};
/*
* This structure contains the addition registers that need to
* preserved across a context switch. This generally consists of
* "preserved" registers.
*/
struct switch_stack {
unsigned long caller_unat; /* user NaT collection register (preserved) */
unsigned long ar_fpsr; /* floating-point status register */
struct ia64_fpreg f2; /* preserved */
struct ia64_fpreg f3; /* preserved */
struct ia64_fpreg f4; /* preserved */
struct ia64_fpreg f5; /* preserved */
struct ia64_fpreg f10; /* scratch, but untouched by kernel */
struct ia64_fpreg f11; /* scratch, but untouched by kernel */
struct ia64_fpreg f12; /* scratch, but untouched by kernel */
struct ia64_fpreg f13; /* scratch, but untouched by kernel */
struct ia64_fpreg f14; /* scratch, but untouched by kernel */
struct ia64_fpreg f15; /* scratch, but untouched by kernel */
struct ia64_fpreg f16; /* preserved */
struct ia64_fpreg f17; /* preserved */
struct ia64_fpreg f18; /* preserved */
struct ia64_fpreg f19; /* preserved */
struct ia64_fpreg f20; /* preserved */
struct ia64_fpreg f21; /* preserved */
struct ia64_fpreg f22; /* preserved */
struct ia64_fpreg f23; /* preserved */
struct ia64_fpreg f24; /* preserved */
struct ia64_fpreg f25; /* preserved */
struct ia64_fpreg f26; /* preserved */
struct ia64_fpreg f27; /* preserved */
struct ia64_fpreg f28; /* preserved */
struct ia64_fpreg f29; /* preserved */
struct ia64_fpreg f30; /* preserved */
struct ia64_fpreg f31; /* preserved */
unsigned long r4; /* preserved */
unsigned long r5; /* preserved */
unsigned long r6; /* preserved */
unsigned long r7; /* preserved */
unsigned long b0; /* so we can force a direct return in copy_thread */
unsigned long b1;
unsigned long b2;
unsigned long b3;
unsigned long b4;
unsigned long b5;
unsigned long ar_pfs; /* previous function state */
unsigned long ar_lc; /* loop counter (preserved) */
unsigned long ar_unat; /* NaT bits for r4-r7 */
unsigned long ar_rnat; /* RSE NaT collection register */
unsigned long ar_bspstore; /* RSE dirty base (preserved) */
unsigned long pr; /* 64 predicate registers (1 bit each) */
};
#ifdef __KERNEL__
/* given a pointer to a task_struct, return the user's pt_regs */
# define ia64_task_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)
struct task_struct; /* forward decl */
extern void show_regs (struct pt_regs *);
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 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);
static inline void
force_successful_syscall_return (void)
{
ia64_task_regs(current)->r8 = 0;
}
#endif /* !__KERNEL__ */
#endif /* !__ASSEMBLY__ */
/*
* The numbers chosen here are somewhat arbitrary but absolutely MUST
* not overlap with any of the number assigned in <linux/ptrace.h>.
*/
#define PTRACE_SINGLEBLOCK 12 /* resume execution until next branch */
#define PTRACE_GETSIGINFO 13 /* get child's siginfo structure */
#define PTRACE_SETSIGINFO 14 /* set child's siginfo structure */
#endif /* _ASM_IA64_PTRACE_H */
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