OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	05/09/2024 07:14:13 AM	rwxr-xr-x
📄 Kbuild	685 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 asm-offsets.h	35 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 asm-uaccess.h	4.11 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 asmmacro.h	2.76 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 atomic.h	7.38 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 barrier.h	542 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 bitops.h	5.08 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 bootparam.h	1.37 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 bugs.h	451 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 cache.h	969 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 cacheasm.h	3.77 KB	06/16/2023 05:32:39 PM	rw-r--r--
📄 cacheflush.h	5.76 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 checksum.h	6 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 cmpxchg.h	3.9 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 coprocessor.h	5.05 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 current.h	675 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 delay.h	1.63 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 dma-mapping.h	855 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 dma.h	1.79 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 elf.h	5.75 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 fixmap.h	2.5 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 flat.h	686 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 ftrace.h	979 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 futex.h	2.59 KB	06/16/2023 05:32:39 PM	rw-r--r--
📄 highmem.h	2.33 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 hw_breakpoint.h	1.45 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 hw_irq.h	320 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 initialize_mmu.h	4.58 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 io.h	2.09 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 irq.h	1.46 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 irqflags.h	1.99 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 kmem_layout.h	2.07 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 mmu.h	462 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 mmu_context.h	3.62 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 module.h	525 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 mxregs.h	1.3 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 nommu_context.h	602 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 page.h	5.69 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 pci-bridge.h	2.16 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 pci.h	1.37 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 perf_event.h	108 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 pgalloc.h	1.84 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 pgtable.h	14.89 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 platform.h	1.75 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 processor.h	7.44 KB	06/16/2023 05:32:39 PM	rw-r--r--
📄 ptrace.h	3.74 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 regs.h	3.87 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 segment.h	376 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 serial.h	443 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 shmparam.h	561 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 signal.h	502 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 smp.h	967 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 spinlock.h	4.6 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 spinlock_types.h	412 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 stacktrace.h	1.13 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 string.h	2.65 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 switch_to.h	601 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 syscall.h	982 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 sysmem.h	426 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 thread_info.h	3.62 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 timex.h	1.79 KB	06/16/2023 05:32:39 PM	rw-r--r--
📄 tlb.h	1.1 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 tlbflush.h	5.53 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 traps.h	1.87 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 types.h	501 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 uaccess.h	8.67 KB	01/28/2018 09:20:33 PM	rw-r--r--
📄 ucontext.h	540 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 unaligned.h	864 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 unistd.h	639 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 user.h	507 bytes	01/28/2018 09:20:33 PM	rw-r--r--
📄 vectors.h	4.05 KB	06/16/2023 05:32:39 PM	rw-r--r--
📄 vga.h	434 bytes	01/28/2018 09:20:33 PM	rw-r--r--

Editing: processor.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 - 2008 Tensilica Inc.
 * Copyright (C) 2015 Cadence Design Systems Inc.
 */

#ifndef _XTENSA_PROCESSOR_H
#define _XTENSA_PROCESSOR_H

#include <variant/core.h>
#include <platform/hardware.h>

#include <linux/compiler.h>
#include <asm/ptrace.h>
#include <asm/types.h>
#include <asm/regs.h>

/* Assertions. */

#if (XCHAL_HAVE_WINDOWED != 1)
# error Linux requires the Xtensa Windowed Registers Option.
#endif

/* Xtensa ABI requires stack alignment to be at least 16 */

#define STACK_ALIGN (XCHAL_DATA_WIDTH > 16 ? XCHAL_DATA_WIDTH : 16)

#define ARCH_SLAB_MINALIGN STACK_ALIGN

/*
 * User space process size: 1 GB.
 * Windowed call ABI requires caller and callee to be located within the same
 * 1 GB region. The C compiler places trampoline code on the stack for sources
 * that take the address of a nested C function (a feature used by glibc), so
 * the 1 GB requirement applies to the stack as well.
 */

#ifdef CONFIG_MMU
#define TASK_SIZE	__XTENSA_UL_CONST(0x40000000)
#else
#define TASK_SIZE	__XTENSA_UL_CONST(0xffffffff)
#endif

#define STACK_TOP	TASK_SIZE
#define STACK_TOP_MAX	STACK_TOP

/*
 * General exception cause assigned to fake NMI. Fake NMI needs to be handled
 * differently from other interrupts, but it uses common kernel entry/exit
 * code.
 */

#define EXCCAUSE_MAPPED_NMI	62

/*
 * General exception cause assigned to debug exceptions. Debug exceptions go
 * to their own vector, rather than the general exception vectors (user,
 * kernel, double); and their specific causes are reported via DEBUGCAUSE
 * rather than EXCCAUSE.  However it is sometimes convenient to redirect debug
 * exceptions to the general exception mechanism.  To do this, an otherwise
 * unused EXCCAUSE value was assigned to debug exceptions for this purpose.
 */

#define EXCCAUSE_MAPPED_DEBUG	63

/*
 * We use DEPC also as a flag to distinguish between double and regular
 * exceptions. For performance reasons, DEPC might contain the value of
 * EXCCAUSE for regular exceptions, so we use this definition to mark a
 * valid double exception address.
 * (Note: We use it in bgeui, so it should be 64, 128, or 256)
 */

#define VALID_DOUBLE_EXCEPTION_ADDRESS	64

#define XTENSA_INT_LEVEL(intno) _XTENSA_INT_LEVEL(intno)
#define _XTENSA_INT_LEVEL(intno) XCHAL_INT##intno##_LEVEL

#define XTENSA_INTLEVEL_MASK(level) _XTENSA_INTLEVEL_MASK(level)
#define _XTENSA_INTLEVEL_MASK(level) (XCHAL_INTLEVEL##level##_MASK)

#define XTENSA_INTLEVEL_ANDBELOW_MASK(l) _XTENSA_INTLEVEL_ANDBELOW_MASK(l)
#define _XTENSA_INTLEVEL_ANDBELOW_MASK(l) (XCHAL_INTLEVEL##l##_ANDBELOW_MASK)

#define PROFILING_INTLEVEL XTENSA_INT_LEVEL(XCHAL_PROFILING_INTERRUPT)

/* LOCKLEVEL defines the interrupt level that masks all
 * general-purpose interrupts.
 */
#if defined(CONFIG_XTENSA_FAKE_NMI) && defined(XCHAL_PROFILING_INTERRUPT)
#define LOCKLEVEL (PROFILING_INTLEVEL - 1)
#else
#define LOCKLEVEL XCHAL_EXCM_LEVEL
#endif

#define TOPLEVEL XCHAL_EXCM_LEVEL
#define XTENSA_FAKE_NMI (LOCKLEVEL < TOPLEVEL)

/* WSBITS and WBBITS are the width of the WINDOWSTART and WINDOWBASE
 * registers
 */
#define WSBITS  (XCHAL_NUM_AREGS / 4)      /* width of WINDOWSTART in bits */
#define WBBITS  (XCHAL_NUM_AREGS_LOG2 - 2) /* width of WINDOWBASE in bits */

#ifndef __ASSEMBLY__

/* Build a valid return address for the specified call winsize.
 * winsize must be 1 (call4), 2 (call8), or 3 (call12)
 */
#define MAKE_RA_FOR_CALL(ra,ws)   (((ra) & 0x3fffffff) | (ws) << 30)

/* Convert return address to a valid pc
 * Note: We assume that the stack pointer is in the same 1GB ranges as the ra
 */
#define MAKE_PC_FROM_RA(ra,sp)    (((ra) & 0x3fffffff) | ((sp) & 0xc0000000))

/* Spill slot location for the register reg in the spill area under the stack
 * pointer sp. reg must be in the range [0..4).
 */
#define SPILL_SLOT(sp, reg) (*(((unsigned long *)(sp)) - 4 + (reg)))

/* Spill slot location for the register reg in the spill area under the stack
 * pointer sp for the call8. reg must be in the range [4..8).
 */
#define SPILL_SLOT_CALL8(sp, reg) (*(((unsigned long *)(sp)) - 12 + (reg)))

/* Spill slot location for the register reg in the spill area under the stack
 * pointer sp for the call12. reg must be in the range [4..12).
 */
#define SPILL_SLOT_CALL12(sp, reg) (*(((unsigned long *)(sp)) - 16 + (reg)))

typedef struct {
	unsigned long seg;
} mm_segment_t;

struct thread_struct {

/* kernel's return address and stack pointer for context switching */
	unsigned long ra; /* kernel's a0: return address and window call size */
	unsigned long sp; /* kernel's a1: stack pointer */

mm_segment_t current_ds;    /* see uaccess.h for example uses */

/* struct xtensa_cpuinfo info; */

unsigned long bad_vaddr; /* last user fault */
	unsigned long bad_uaddr; /* last kernel fault accessing user space */
	unsigned long error_code;
#ifdef CONFIG_HAVE_HW_BREAKPOINT
	struct perf_event *ptrace_bp[XCHAL_NUM_IBREAK];
	struct perf_event *ptrace_wp[XCHAL_NUM_DBREAK];
#endif
	/* Make structure 16 bytes aligned. */
	int align[0] __attribute__ ((aligned(16)));
};

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr()  ({ __label__ _l; _l: &&_l;})

/* This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)

#define INIT_THREAD  \
{									\
	ra:		0, 						\
	sp:		sizeof(init_stack) + (long) &init_stack,	\
	current_ds:	{0},						\
	/*info:		{0}, */						\
	bad_vaddr:	0,						\
	bad_uaddr:	0,						\
	error_code:	0,						\
}

/*
 * Do necessary setup to start up a newly executed thread.
 * Note: We set-up ps as if we did a call4 to the new pc.
 *       set_thread_state in signal.c depends on it.
 */
#define USER_PS_VALUE ((1 << PS_WOE_BIT) |				\
		       (1 << PS_CALLINC_SHIFT) |			\
		       (USER_RING << PS_RING_SHIFT) |			\
		       (1 << PS_UM_BIT) |				\
		       (1 << PS_EXCM_BIT))

/* Clearing a0 terminates the backtrace. */
#define start_thread(regs, new_pc, new_sp) \
	memset(regs, 0, sizeof(*regs)); \
	regs->pc = new_pc; \
	regs->ps = USER_PS_VALUE; \
	regs->areg[1] = new_sp; \
	regs->areg[0] = 0; \
	regs->wmask = 1; \
	regs->depc = 0; \
	regs->windowbase = 0; \
	regs->windowstart = 1;

/* Forward declaration */
struct task_struct;
struct mm_struct;

/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)

extern unsigned long get_wchan(struct task_struct *p);

#define KSTK_EIP(tsk)		(task_pt_regs(tsk)->pc)
#define KSTK_ESP(tsk)		(task_pt_regs(tsk)->areg[1])

#define cpu_relax()  barrier()

/* Special register access. */

#define WSR(v,sr) __asm__ __volatile__ ("wsr %0,"__stringify(sr) :: "a"(v));
#define RSR(v,sr) __asm__ __volatile__ ("rsr %0,"__stringify(sr) : "=a"(v));

#define set_sr(x,sr) ({unsigned int v=(unsigned int)x; WSR(v,sr);})
#define get_sr(sr) ({unsigned int v; RSR(v,sr); v; })

#ifndef XCHAL_HAVE_EXTERN_REGS
#define XCHAL_HAVE_EXTERN_REGS 0
#endif

#if XCHAL_HAVE_EXTERN_REGS

static inline void set_er(unsigned long value, unsigned long addr)
{
	asm volatile ("wer %0, %1" : : "a" (value), "a" (addr) : "memory");
}

static inline unsigned long get_er(unsigned long addr)
{
	register unsigned long value;
	asm volatile ("rer %0, %1" : "=a" (value) : "a" (addr) : "memory");
	return value;
}

#endif /* XCHAL_HAVE_EXTERN_REGS */

#endif	/* __ASSEMBLY__ */
#endif	/* _XTENSA_PROCESSOR_H */