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linux/arch/alpha/lib/copy_user.S

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* arch/alpha/lib/copy_user.S
*
* Copy to/from user space, handling exceptions as we go.. This
* isn't exactly pretty.
*
* This is essentially the same as "memcpy()", but with a few twists.
* Notably, we have to make sure that $0 is always up-to-date and
* contains the right "bytes left to copy" value (and that it is updated
* only _after_ a successful copy). There is also some rather minor
* exception setup stuff..
*/
alpha: move exports to actual definitions Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-01-11 22:51:29 +08:00
#include <asm/export.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Allow an exception for an insn; exit if we get one. */
#define EXI(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.long 99b - .; \
lda $31, $exitin-99b($31); \
.previous
#define EXO(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.long 99b - .; \
lda $31, $exitout-99b($31); \
.previous
.set noat
.align 4
.globl __copy_user
.ent __copy_user
__copy_user:
.prologue 0
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
and $18,$18,$0
and $16,7,$3
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
beq $0,$35
beq $3,$36
subq $3,8,$3
.align 4
$37:
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXI( ldq_u $1,0($17) )
EXO( ldq_u $2,0($16) )
extbl $1,$17,$1
mskbl $2,$16,$2
insbl $1,$16,$1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
addq $3,1,$3
bis $1,$2,$1
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXO( stq_u $1,0($16) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
subq $0,1,$0
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
addq $16,1,$16
addq $17,1,$17
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
beq $0,$41
bne $3,$37
$36:
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
and $17,7,$1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bic $0,7,$4
beq $1,$43
beq $4,$48
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXI( ldq_u $3,0($17) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
.align 4
$50:
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXI( ldq_u $2,8($17) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
subq $4,8,$4
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
extql $3,$17,$3
extqh $2,$17,$1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bis $3,$1,$1
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXO( stq $1,0($16) )
addq $17,8,$17
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
subq $0,8,$0
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
addq $16,8,$16
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bis $2,$2,$3
bne $4,$50
$48:
beq $0,$41
.align 4
$57:
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXI( ldq_u $1,0($17) )
EXO( ldq_u $2,0($16) )
extbl $1,$17,$1
mskbl $2,$16,$2
insbl $1,$16,$1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bis $1,$2,$1
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXO( stq_u $1,0($16) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
subq $0,1,$0
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
addq $16,1,$16
addq $17,1,$17
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bne $0,$57
br $31,$41
.align 4
$43:
beq $4,$65
.align 4
$66:
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXI( ldq $1,0($17) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
subq $4,8,$4
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXO( stq $1,0($16) )
addq $17,8,$17
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
subq $0,8,$0
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
addq $16,8,$16
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bne $4,$66
$65:
beq $0,$41
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXI( ldq $2,0($17) )
EXO( ldq $1,0($16) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
mskql $2,$0,$2
mskqh $1,$0,$1
bis $2,$1,$2
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
EXO( stq $2,0($16) )
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
bis $31,$31,$0
$41:
$35:
$exitin:
alpha: get rid of tail-zeroing in __copy_user() ... and adjust copy_from_user() accordingly Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-11 04:21:34 +08:00
$exitout:
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions They used to need odd calling conventions due to old exception handling mechanism, the last remnants of which had disappeared back in 2002. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-25 09:26:18 +08:00
ret $31,($26),1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
.end __copy_user
alpha: move exports to actual definitions Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-01-11 22:51:29 +08:00
EXPORT_SYMBOL(__copy_user)