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/*
 * include/asm-xtensa/ptrace.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */
#ifndef _XTENSA_PTRACE_H
#define _XTENSA_PTRACE_H

#include <uapi/asm/ptrace.h>

/*
 * Kernel stack
 *
 *		+-----------------------+  -------- STACK_SIZE
 *		|     register file     |  |
 *		+-----------------------+  |
 *		|    struct pt_regs     |  |
 *		+-----------------------+  | ------ PT_REGS_OFFSET
 * double	:  16 bytes spill area  :  |  ^
 * excetion	:- - - - - - - - - - - -:  |  |
 * frame	:    struct pt_regs     :  |  |
 *		:- - - - - - - - - - - -:  |  |
 *		|                       |  |  |
 *		|     memory stack      |  |  |
 *		|                       |  |  |
 *		~                       ~  ~  ~
 *		~                       ~  ~  ~
 *		|                       |  |  |
 *		|                       |  |  |
 *		+-----------------------+  |  | --- STACK_BIAS
 *		|  struct task_struct   |  |  |  ^
 *  current --> +-----------------------+  |  |  |
 *		|  struct thread_info   |  |  |  |
 *		+-----------------------+ --------
 */

#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)

/*  Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */

#define EXC_TABLE_KSTK		0x004	/* Kernel Stack */
#define EXC_TABLE_DOUBLE_SAVE	0x008	/* Double exception save area for a0 */
#define EXC_TABLE_FIXUP		0x00c	/* Fixup handler */
#define EXC_TABLE_PARAM		0x010	/* For passing a parameter to fixup */
#define EXC_TABLE_SYSCALL_SAVE	0x014	/* For fast syscall handler */
#define EXC_TABLE_FAST_USER	0x100	/* Fast user exception handler */
#define EXC_TABLE_FAST_KERNEL	0x200	/* Fast kernel exception handler */
#define EXC_TABLE_DEFAULT	0x300	/* Default C-Handler */
#define EXC_TABLE_SIZE		0x400

#ifndef __ASSEMBLY__

#include <asm/coprocessor.h>

/*
 * This struct defines the way the registers are stored on the
 * kernel stack during a system call or other kernel entry.
 */
struct pt_regs {
	unsigned long pc;		/*   4 */
	unsigned long ps;		/*   8 */
	unsigned long depc;		/*  12 */
	unsigned long exccause;		/*  16 */
	unsigned long excvaddr;		/*  20 */
	unsigned long debugcause;	/*  24 */
	unsigned long wmask;		/*  28 */
	unsigned long lbeg;		/*  32 */
	unsigned long lend;		/*  36 */
	unsigned long lcount;		/*  40 */
	unsigned long sar;		/*  44 */
	unsigned long windowbase;	/*  48 */
	unsigned long windowstart;	/*  52 */
	unsigned long syscall;		/*  56 */
	unsigned long icountlevel;	/*  60 */
	unsigned long scompare1;	/*  64 */
	unsigned long threadptr;	/*  68 */

	/* Additional configurable registers that are used by the compiler. */
	xtregs_opt_t xtregs_opt;

	/* Make sure the areg field is 16 bytes aligned. */
	int align[0] __attribute__ ((aligned(16)));

	/* current register frame.
	 * Note: The ESF for kernel exceptions ends after 16 registers!
	 */
	unsigned long areg[16];
};

#include <variant/core.h>

# define arch_has_single_step()	(1)
# define task_pt_regs(tsk) ((struct pt_regs*) \
	(task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
# define instruction_pointer(regs) ((regs)->pc)
# define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \
					       (regs)->areg[1]))

# ifndef CONFIG_SMP
#  define profile_pc(regs) instruction_pointer(regs)
# else
#  define profile_pc(regs)						\
	({								\
		in_lock_functions(instruction_pointer(regs)) ?		\
		return_pointer(regs) : instruction_pointer(regs);	\
	})
# endif

#define user_stack_pointer(regs) ((regs)->areg[1])

#else	/* __ASSEMBLY__ */

# include <asm/asm-offsets.h>
#define PT_REGS_OFFSET	  (KERNEL_STACK_SIZE - PT_USER_SIZE)

#endif	/* !__ASSEMBLY__ */

#endif	/* _XTENSA_PTRACE_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 685 B 0644
asm-offsets.h File 35 B 0644
asm-uaccess.h File 4.11 KB 0644
asmmacro.h File 2.76 KB 0644
atomic.h File 7.38 KB 0644
barrier.h File 542 B 0644
bitops.h File 5.08 KB 0644
bootparam.h File 1.37 KB 0644
bugs.h File 451 B 0644
cache.h File 969 B 0644
cacheasm.h File 3.77 KB 0644
cacheflush.h File 5.76 KB 0644
checksum.h File 6 KB 0644
cmpxchg.h File 3.9 KB 0644
coprocessor.h File 5.05 KB 0644
current.h File 675 B 0644
delay.h File 1.63 KB 0644
dma-mapping.h File 855 B 0644
dma.h File 1.79 KB 0644
elf.h File 5.75 KB 0644
fixmap.h File 2.5 KB 0644
flat.h File 686 B 0644
ftrace.h File 979 B 0644
futex.h File 2.59 KB 0644
highmem.h File 2.33 KB 0644
hw_breakpoint.h File 1.45 KB 0644
hw_irq.h File 320 B 0644
initialize_mmu.h File 4.58 KB 0644
io.h File 2.09 KB 0644
irq.h File 1.46 KB 0644
irqflags.h File 1.99 KB 0644
kmem_layout.h File 2.07 KB 0644
mmu.h File 462 B 0644
mmu_context.h File 3.62 KB 0644
module.h File 525 B 0644
mxregs.h File 1.3 KB 0644
nommu_context.h File 602 B 0644
page.h File 5.69 KB 0644
pci-bridge.h File 2.16 KB 0644
pci.h File 1.37 KB 0644
perf_event.h File 108 B 0644
pgalloc.h File 1.84 KB 0644
pgtable.h File 14.89 KB 0644
platform.h File 1.75 KB 0644
processor.h File 7.44 KB 0644
ptrace.h File 3.74 KB 0644
regs.h File 3.87 KB 0644
segment.h File 376 B 0644
serial.h File 443 B 0644
shmparam.h File 561 B 0644
signal.h File 502 B 0644
smp.h File 967 B 0644
spinlock.h File 4.6 KB 0644
spinlock_types.h File 412 B 0644
stacktrace.h File 1.13 KB 0644
string.h File 2.65 KB 0644
switch_to.h File 601 B 0644
syscall.h File 982 B 0644
sysmem.h File 426 B 0644
thread_info.h File 3.62 KB 0644
timex.h File 1.79 KB 0644
tlb.h File 1.1 KB 0644
tlbflush.h File 5.53 KB 0644
traps.h File 1.87 KB 0644
types.h File 501 B 0644
uaccess.h File 8.67 KB 0644
ucontext.h File 540 B 0644
unaligned.h File 864 B 0644
unistd.h File 639 B 0644
user.h File 507 B 0644
vectors.h File 4.05 KB 0644
vga.h File 434 B 0644