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sparc32: switch to generic extables

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-07-16 14:05:36 -04:00
parent c4da8e0dc6
commit b4edf06c8a
10 changed files with 22 additions and 170 deletions
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1
arch/sparc/include/asm/elf_64.h
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@@ -8,7 +8,6 @@
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/extable_64.h>
#include <asm/spitfire.h>
#include <asm/adi.h>

4
arch/sparc/include/asm/extable_64.h → arch/sparc/include/asm/extable.h
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@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_EXTABLE64_H
#define __ASM_EXTABLE64_H
#ifndef __ASM_EXTABLE_H
#define __ASM_EXTABLE_H
/*
* The exception table consists of pairs of addresses: the first is the
* address of an instruction that is allowed to fault, and the second is

3
arch/sparc/include/asm/uaccess.h
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@@ -1,6 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ___ASM_SPARC_UACCESS_H
#define ___ASM_SPARC_UACCESS_H
#include <asm/extable.h>
#if defined(__sparc__) && defined(__arch64__)
#include <asm/uaccess_64.h>
#else

33
arch/sparc/include/asm/uaccess_32.h
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@@ -13,9 +13,6 @@
#include <asm/processor.h>
#define ARCH_HAS_SORT_EXTABLE
#define ARCH_HAS_SEARCH_EXTABLE
/* Sparc is not segmented, however we need to be able to fool access_ok()
* when doing system calls from kernel mode legitimately.
*
@@ -40,36 +37,6 @@
#define __access_ok(addr, size) (__user_ok((addr) & get_fs().seg, (size)))
#define access_ok(addr, size) __access_ok((unsigned long)(addr), size)
/*
* The exception table consists of pairs of addresses: the first is the
* address of an instruction that is allowed to fault, and the second is
* the address at which the program should continue. No registers are
* modified, so it is entirely up to the continuation code to figure out
* what to do.
*
* All the routines below use bits of fixup code that are out of line
* with the main instruction path. This means when everything is well,
* we don't even have to jump over them. Further, they do not intrude
* on our cache or tlb entries.
*
* There is a special way how to put a range of potentially faulting
* insns (like twenty ldd/std's with now intervening other instructions)
* You specify address of first in insn and 0 in fixup and in the next
* exception_table_entry you specify last potentially faulting insn + 1
* and in fixup the routine which should handle the fault.
* That fixup code will get
* (faulting_insn_address - first_insn_in_the_range_address)/4
* in %g2 (ie. index of the faulting instruction in the range).
*/
struct exception_table_entry
{
unsigned long insn, fixup;
};
/* Returns 0 if exception not found and fixup otherwise. */
unsigned long search_extables_range(unsigned long addr, unsigned long *g2);
/* Uh, these should become the main single-value transfer routines..
* They automatically use the right size if we just have the right
* pointer type..

1
arch/sparc/include/asm/uaccess_64.h
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@@ -10,7 +10,6 @@
#include <linux/string.h>
#include <asm/asi.h>
#include <asm/spitfire.h>
#include <asm/extable_64.h>
#include <asm/processor.h>