diff options
| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/alpha/lib/strncpy.S | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/alpha/lib/strncpy.S')
| -rw-r--r-- | kernel/arch/alpha/lib/strncpy.S | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/kernel/arch/alpha/lib/strncpy.S b/kernel/arch/alpha/lib/strncpy.S new file mode 100644 index 000000000..a46f7f3ad --- /dev/null +++ b/kernel/arch/alpha/lib/strncpy.S @@ -0,0 +1,81 @@ +/* + * arch/alpha/lib/strncpy.S + * Contributed by Richard Henderson (rth@tamu.edu) + * + * Copy no more than COUNT bytes of the null-terminated string from + * SRC to DST. If SRC does not cover all of COUNT, the balance is + * zeroed. + * + * Or, rather, if the kernel cared about that weird ANSI quirk. This + * version has cropped that bit o' nastiness as well as assuming that + * __stxncpy is in range of a branch. + */ + + .set noat + .set noreorder + + .text + + .align 4 + .globl strncpy + .ent strncpy +strncpy: + .frame $30, 0, $26 + .prologue 0 + + mov $16, $0 # set return value now + beq $18, $zerolen + unop + bsr $23, __stxncpy # do the work of the copy + + unop + bne $18, $multiword # do we have full words left? + subq $24, 1, $3 # nope + subq $27, 1, $4 + + or $3, $24, $3 # clear the bits between the last + or $4, $27, $4 # written byte and the last byte in COUNT + andnot $3, $4, $4 + zap $1, $4, $1 + + stq_u $1, 0($16) + ret + + .align 4 +$multiword: + subq $27, 1, $2 # clear the final bits in the prev word + or $2, $27, $2 + zapnot $1, $2, $1 + subq $18, 1, $18 + + stq_u $1, 0($16) + addq $16, 8, $16 + unop + beq $18, 1f + + nop + unop + nop + blbc $18, 0f + + stq_u $31, 0($16) # zero one word + subq $18, 1, $18 + addq $16, 8, $16 + beq $18, 1f + +0: stq_u $31, 0($16) # zero two words + subq $18, 2, $18 + stq_u $31, 8($16) + addq $16, 16, $16 + bne $18, 0b + +1: ldq_u $1, 0($16) # clear the leading bits in the final word + subq $24, 1, $2 + or $2, $24, $2 + + zap $1, $2, $1 + stq_u $1, 0($16) +$zerolen: + ret + + .end strncpy |