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8478132a87
This reverts commit 4dd1837d75.
Moving the exports for assembly code into the assembly files breaks
KSYM trimming, but also breaks modversions.
While fixing the KSYM trimming is trivial, fixing modversions brings
us to a technically worse position that we had prior to the above
change:
- We end up with the prototype definitions divorsed from everything
else, which means that adding or removing assembly level ksyms
become more fragile:
* if adding a new assembly ksyms export, a missed prototype in
asm-prototypes.h results in a successful build if no module in
the selected configuration makes use of the symbol.
* when removing a ksyms export, asm-prototypes.h will get forgotten,
with armksyms.c, you'll get a build error if you forget to touch
the file.
- We end up with the same amount of include files and prototypes,
they're just in a header file instead of a .c file with their
exports.
As for lines of code, we don't get much of a size reduction:
(original commit)
47 files changed, 131 insertions(+), 208 deletions(-)
(fix for ksyms trimming)
7 files changed, 18 insertions(+), 5 deletions(-)
(two fixes for modversions)
1 file changed, 34 insertions(+)
3 files changed, 7 insertions(+), 2 deletions(-)
which results in a net total of only 25 lines deleted.
As there does not seem to be much benefit from this change of approach,
revert the change.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
149 lines
3.1 KiB
ArmAsm
149 lines
3.1 KiB
ArmAsm
/*
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* linux/arch/arm/lib/getuser.S
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*
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* Copyright (C) 2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Idea from x86 version, (C) Copyright 1998 Linus Torvalds
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*
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* These functions have a non-standard call interface to make them more
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* efficient, especially as they return an error value in addition to
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* the "real" return value.
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*
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* __get_user_X
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*
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* Inputs: r0 contains the address
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* r1 contains the address limit, which must be preserved
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* Outputs: r0 is the error code
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* r2, r3 contains the zero-extended value
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* lr corrupted
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*
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* No other registers must be altered. (see <asm/uaccess.h>
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* for specific ASM register usage).
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*
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* Note that ADDR_LIMIT is either 0 or 0xc0000000.
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* Note also that it is intended that __get_user_bad is not global.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <asm/errno.h>
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#include <asm/domain.h>
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ENTRY(__get_user_1)
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check_uaccess r0, 1, r1, r2, __get_user_bad
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1: TUSER(ldrb) r2, [r0]
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mov r0, #0
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ret lr
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ENDPROC(__get_user_1)
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ENTRY(__get_user_2)
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check_uaccess r0, 2, r1, r2, __get_user_bad
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#ifdef CONFIG_CPU_USE_DOMAINS
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rb .req ip
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2: ldrbt r2, [r0], #1
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3: ldrbt rb, [r0], #0
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#else
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rb .req r0
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2: ldrb r2, [r0]
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3: ldrb rb, [r0, #1]
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#endif
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#ifndef __ARMEB__
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orr r2, r2, rb, lsl #8
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#else
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orr r2, rb, r2, lsl #8
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#endif
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mov r0, #0
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ret lr
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ENDPROC(__get_user_2)
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ENTRY(__get_user_4)
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check_uaccess r0, 4, r1, r2, __get_user_bad
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4: TUSER(ldr) r2, [r0]
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mov r0, #0
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ret lr
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ENDPROC(__get_user_4)
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ENTRY(__get_user_8)
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check_uaccess r0, 8, r1, r2, __get_user_bad
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#ifdef CONFIG_THUMB2_KERNEL
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5: TUSER(ldr) r2, [r0]
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6: TUSER(ldr) r3, [r0, #4]
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#else
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5: TUSER(ldr) r2, [r0], #4
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6: TUSER(ldr) r3, [r0]
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#endif
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mov r0, #0
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ret lr
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ENDPROC(__get_user_8)
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#ifdef __ARMEB__
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ENTRY(__get_user_32t_8)
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check_uaccess r0, 8, r1, r2, __get_user_bad
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#ifdef CONFIG_CPU_USE_DOMAINS
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add r0, r0, #4
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7: ldrt r2, [r0]
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#else
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7: ldr r2, [r0, #4]
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#endif
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mov r0, #0
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ret lr
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ENDPROC(__get_user_32t_8)
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ENTRY(__get_user_64t_1)
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check_uaccess r0, 1, r1, r2, __get_user_bad8
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8: TUSER(ldrb) r3, [r0]
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mov r0, #0
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ret lr
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ENDPROC(__get_user_64t_1)
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ENTRY(__get_user_64t_2)
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check_uaccess r0, 2, r1, r2, __get_user_bad8
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#ifdef CONFIG_CPU_USE_DOMAINS
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rb .req ip
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9: ldrbt r3, [r0], #1
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10: ldrbt rb, [r0], #0
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#else
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rb .req r0
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9: ldrb r3, [r0]
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10: ldrb rb, [r0, #1]
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#endif
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orr r3, rb, r3, lsl #8
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mov r0, #0
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ret lr
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ENDPROC(__get_user_64t_2)
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ENTRY(__get_user_64t_4)
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check_uaccess r0, 4, r1, r2, __get_user_bad8
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11: TUSER(ldr) r3, [r0]
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mov r0, #0
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ret lr
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ENDPROC(__get_user_64t_4)
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#endif
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__get_user_bad8:
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mov r3, #0
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__get_user_bad:
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mov r2, #0
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mov r0, #-EFAULT
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ret lr
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ENDPROC(__get_user_bad)
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ENDPROC(__get_user_bad8)
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.pushsection __ex_table, "a"
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.long 1b, __get_user_bad
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.long 2b, __get_user_bad
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.long 3b, __get_user_bad
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.long 4b, __get_user_bad
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.long 5b, __get_user_bad8
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.long 6b, __get_user_bad8
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#ifdef __ARMEB__
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.long 7b, __get_user_bad
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.long 8b, __get_user_bad8
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.long 9b, __get_user_bad8
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.long 10b, __get_user_bad8
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.long 11b, __get_user_bad8
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#endif
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.popsection
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