diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc64/power7/strncpy.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power7/strncpy.S | 48 |
1 files changed, 33 insertions, 15 deletions
diff --git a/sysdeps/powerpc/powerpc64/power7/strncpy.S b/sysdeps/powerpc/powerpc64/power7/strncpy.S index 1b4a3d9181..1965f82a2b 100644 --- a/sysdeps/powerpc/powerpc64/power7/strncpy.S +++ b/sysdeps/powerpc/powerpc64/power7/strncpy.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2014-2016 Free Software Foundation, Inc. +/* Copyright (C) 2014-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -40,17 +40,26 @@ memset. */ #ifdef USE_AS_STPNCPY -# define FUNC_NAME __stpncpy +# ifndef STPNCPY +# define FUNC_NAME __stpncpy +# else +# define FUNC_NAME STPNCPY +# endif #else -# define FUNC_NAME strncpy -#endif +# ifndef STRNCPY +# define FUNC_NAME strncpy +# else +# define FUNC_NAME STRNCPY +# endif +#endif /* !USE_AS_STPNCPY */ -#define FRAMESIZE (FRAME_MIN_SIZE+32) +#define FRAMESIZE (FRAME_MIN_SIZE+16) #ifndef MEMSET /* For builds with no IFUNC support, local calls should be made to internal GLIBC symbol (created by libc_hidden_builtin_def). */ # ifdef SHARED +# define MEMSET_is_local # define MEMSET __GI_memset # else # define MEMSET memset @@ -58,17 +67,20 @@ #endif .machine power7 -EALIGN(FUNC_NAME, 4, 0) +#ifdef MEMSET_is_local +ENTRY_TOCLESS (FUNC_NAME, 4) +#else +ENTRY (FUNC_NAME, 4) +#endif CALL_MCOUNT 3 - mflr r0 /* load link register LR to r0 */ or r10, r3, r4 /* to verify source and destination */ rldicl. r8, r10, 0, 61 /* is double word aligned .. ? */ std r19, -8(r1) /* save callers register , r19 */ std r18, -16(r1) /* save callers register , r18 */ - std r0, 16(r1) /* store the link register */ - stdu r1, -FRAMESIZE(r1) /* create the stack frame */ + cfi_offset(r19, -8) + cfi_offset(r18, -16) mr r9, r3 /* save r3 into r9 for use */ mr r18, r3 /* save r3 for retCode of strncpy */ @@ -211,11 +223,23 @@ L(zeroFill): cmpdi cr7, r8, 0 /* compare if length is zero */ beq cr7, L(update3return) + mflr r0 /* load link register LR to r0 */ + std r0, 16(r1) /* store the link register */ + stdu r1, -FRAMESIZE(r1) /* create the stack frame */ + cfi_adjust_cfa_offset(FRAMESIZE) + cfi_offset(lr, 16) mr r3, r19 /* fill buffer with */ li r4, 0 /* zero fill buffer */ mr r5, r8 /* how many bytes to fill buffer with */ bl MEMSET /* call optimized memset */ +#ifndef MEMSET_is_local nop +#endif + ld r0, FRAMESIZE+16(r1) /* read the saved link register */ + addi r1, r1, FRAMESIZE /* restore stack pointer */ + cfi_adjust_cfa_offset(-FRAMESIZE) + mtlr r0 + cfi_restore(lr) L(update3return): #ifdef USE_AS_STPNCPY @@ -226,11 +250,8 @@ L(hop2return): #ifndef USE_AS_STPNCPY mr r3, r18 /* set return value */ #endif - addi r1, r1, FRAMESIZE /* restore stack pointer */ - ld r0, 16(r1) /* read the saved link register */ ld r18, -16(r1) /* restore callers save register, r18 */ ld r19, -8(r1) /* restore callers save register, r19 */ - mtlr r0 /* branch to link register */ blr /* return */ .p2align 4 @@ -264,16 +285,13 @@ L(oneBYone): .p2align 4 L(done): - addi r1, r1, FRAMESIZE /* restore stack pointer */ #ifdef USE_AS_STPNCPY mr r3, r19 /* set the return value */ #else mr r3, r18 /* set the return value */ #endif - ld r0, 16(r1) /* read the saved link register */ ld r18, -16(r1) /* restore callers save register, r18 */ ld r19, -8(r1) /* restore callers save register, r19 */ - mtlr r0 /* branch to link register */ blr /* return */ L(update1): |