diff options
| -rw-r--r-- | ChangeLog | 13 | ||||
| -rw-r--r-- | dirent/dirent.h | 12 | ||||
| -rw-r--r-- | sysdeps/arm/memset.S | 75 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/mmap.S | 39 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/mmap64.S | 38 |
5 files changed, 115 insertions, 62 deletions
@@ -1,3 +1,16 @@ +2003-09-14 Ulrich Drepper <drepper@redhat.com> + + * dirent/dirent.h: Remove __THROW from scandir. + +2003-09-14 Philip Blundell <philb@gnu.org> + + * sysdeps/unix/sysv/linux/arm/mmap.S: Use sys_mmap2 if it's known + to be available. + + * sysdeps/unix/sysv/linux/arm/mmap64.S: Optimise code a little. + + * sysdeps/arm/memset.S: Rewrite. + 2003-09-12 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/s390/bits/typesizes.h: New. diff --git a/dirent/dirent.h b/dirent/dirent.h index 9f7c380..319fb74 100644 --- a/dirent/dirent.h +++ b/dirent/dirent.h @@ -239,14 +239,14 @@ extern int dirfd (DIR *__dirp) __THROW; extern int scandir (__const char *__restrict __dir, struct dirent ***__restrict __namelist, int (*__selector) (__const struct dirent *), - int (*__cmp) (__const void *, __const void *)) __THROW; + int (*__cmp) (__const void *, __const void *)); # else # ifdef __REDIRECT extern int __REDIRECT (scandir, (__const char *__restrict __dir, struct dirent ***__restrict __namelist, int (*__selector) (__const struct dirent *), - int (*__cmp) (__const void *, __const void *)) __THROW, + int (*__cmp) (__const void *, __const void *)), scandir64); # else # define scandir scandir64 @@ -259,7 +259,7 @@ extern int __REDIRECT (scandir, extern int scandir64 (__const char *__restrict __dir, struct dirent64 ***__restrict __namelist, int (*__selector) (__const struct dirent64 *), - int (*__cmp) (__const void *, __const void *)) __THROW; + int (*__cmp) (__const void *, __const void *)); # endif /* Function to compare two `struct dirent's alphabetically. */ @@ -269,8 +269,7 @@ extern int alphasort (__const void *__e1, __const void *__e2) # else # ifdef __REDIRECT extern int __REDIRECT (alphasort, - (__const void *__e1, __const void *__e2) - __THROW, + (__const void *__e1, __const void *__e2) __THROW, alphasort64) __attribute_pure__; # else # define alphasort alphasort64 @@ -290,8 +289,7 @@ extern int versionsort (__const void *__e1, __const void *__e2) # else # ifdef __REDIRECT extern int __REDIRECT (versionsort, - (__const void *__e1, __const void *__e2) - __THROW, + (__const void *__e1, __const void *__e2) __THROW, versionsort64) __attribute_pure__; # else # define versionsort versionsort64 diff --git a/sysdeps/arm/memset.S b/sysdeps/arm/memset.S index 0b62413..1e2699d 100644 --- a/sysdeps/arm/memset.S +++ b/sysdeps/arm/memset.S @@ -22,47 +22,46 @@ /* void *memset (dstpp, c, len) */ ENTRY(memset) - mov a4, a1 - cmp a3, $8 @ at least 8 bytes to do? - blt 2f - orr a2, a2, a2, lsl $8 - orr a2, a2, a2, lsl $16 + mov r3, r0 + cmp r2, #8 + bcc 2f @ less than 8 bytes to move + 1: - tst a4, $3 @ aligned yet? - strneb a2, [a4], $1 - subne a3, a3, $1 + tst r3, #3 @ aligned yet? + strneb r1, [r3], #1 + subne r2, r2, #1 bne 1b - mov ip, a2 + + orr r1, r1, r1, lsl $8 + orr r1, r1, r1, lsl $16 + 1: - cmp a3, $8 @ 8 bytes still to do? - blt 2f - stmia a4!, {a2, ip} - sub a3, a3, $8 - cmp a3, $8 @ 8 bytes still to do? - blt 2f - stmia a4!, {a2, ip} - sub a3, a3, $8 - cmp a3, $8 @ 8 bytes still to do? - blt 2f - stmia a4!, {a2, ip} - sub a3, a3, $8 - cmp a3, $8 @ 8 bytes still to do? - stmgeia a4!, {a2, ip} - subge a3, a3, $8 - bge 1b + subs r2, r2, #8 + strcs r1, [r3], #4 @ store up to 32 bytes per loop iteration + strcs r1, [r3], #4 + subcss r2, r2, #8 + strcs r1, [r3], #4 + strcs r1, [r3], #4 + subcss r2, r2, #8 + strcs r1, [r3], #4 + strcs r1, [r3], #4 + subcss r2, r2, #8 + strcs r1, [r3], #4 + strcs r1, [r3], #4 + bcs 1b + + and r2, r2, #7 2: - movs a3, a3 @ anything left? - RETINSTR(moveq,pc,lr) @ nope - rsb a3, a3, $7 - add pc, pc, a3, lsl $2 - mov r0, r0 - strb a2, [a4], $1 - strb a2, [a4], $1 - strb a2, [a4], $1 - strb a2, [a4], $1 - strb a2, [a4], $1 - strb a2, [a4], $1 - strb a2, [a4], $1 - RETINSTR(mov,pc,lr) + subs r2, r2, #1 @ store up to 4 bytes per loop iteration + strcsb r1, [r3], #1 + subcss r2, r2, #1 + strcsb r1, [r3], #1 + subcss r2, r2, #1 + strcsb r1, [r3], #1 + subcss r2, r2, #1 + strcsb r1, [r3], #1 + bcs 2b + + DO_RET(lr) END(memset) libc_hidden_builtin_def (memset) diff --git a/sysdeps/unix/sysv/linux/arm/mmap.S b/sysdeps/unix/sysv/linux/arm/mmap.S index af93c7b..7beba68 100644 --- a/sysdeps/unix/sysv/linux/arm/mmap.S +++ b/sysdeps/unix/sysv/linux/arm/mmap.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1998, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1998, 2000, 2003 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 @@ -17,11 +17,47 @@ 02111-1307 USA. */ #include <sysdep.h> +#include <kernel-features.h> + +#define EINVAL 22 .text ENTRY (__mmap) +# ifdef __ASSUME_MMAP2_SYSCALL + /* This code is actually a couple of cycles slower than the + sys_mmap version below, so it might seem like a loss. But the + code path inside the kernel is sufficiently much shorter to + make it a net gain to use mmap2 when it's known to be + available. */ + + /* shuffle args */ + str r5, [sp, #-4]! + ldr r5, [sp, #8] + str r4, [sp, #-4]! + ldr r4, [sp, #8] + + /* convert offset to pages */ + movs ip, r5, lsl #20 + bne .Linval + mov r5, r5, lsr #12 + + /* do the syscall */ + swi SYS_ify (mmap2) + + /* restore registers */ +2: + ldr r4, [sp], #4 + ldr r5, [sp], #4 + + cmn r0, $4096 + RETINSTR(movcc, pc, lr) + b PLTJMP(syscall_error) +.Linval: + mov r0, #-EINVAL + b 2b +# else /* Because we can only get five args through the syscall interface, and mmap() takes six, we need to build a parameter block and pass its address instead. The 386 port does a similar trick. */ @@ -49,6 +85,7 @@ ENTRY (__mmap) cmn r0, $4096 RETINSTR(movcc, pc, lr) b PLTJMP(syscall_error); +#endif PSEUDO_END (__mmap) diff --git a/sysdeps/unix/sysv/linux/arm/mmap64.S b/sysdeps/unix/sysv/linux/arm/mmap64.S index 3936e25..f8361b5 100644 --- a/sysdeps/unix/sysv/linux/arm/mmap64.S +++ b/sysdeps/unix/sysv/linux/arm/mmap64.S @@ -27,38 +27,44 @@ .text ENTRY (__mmap64) #ifdef __NR_mmap2 - stmfd sp!, {r4, r5, lr} - ldr r5, [sp, $16] - ldr r4, [sp, $12] - movs ip, r5, lsl $20 @ check that offset is page-aligned + ldr ip, [sp, $4] @ offset low part + str r5, [sp, #-4]! + ldr r5, [sp, $12] @ offset high part + str r4, [sp, #-4]! + movs r4, ip, lsl $20 @ check that offset is page-aligned + mov ip, ip, lsr $12 + moveqs r4, r5, lsr $12 @ check for overflow bne .Linval - ldr ip, [sp, $20] - mov r5, r5, lsr $12 - orr r5, r5, ip, lsl $20 @ compose page offset - movs ip, ip, lsr $12 - bne .Linval @ check for overflow + ldr r4, [sp, $8] @ load fd + orr r5, ip, r5, lsl $20 @ compose page offset mov ip, r0 swi SYS_ify (mmap2) cmn r0, $4096 - LOADREGS(ccfd, sp!, {r4, r5, pc}) # ifdef __ASSUME_MMAP2_SYSCALL - ldmfd sp!, {r4, r5, lr} + ldr r4, [sp], #4 + ldr r5, [sp], #4 + RETINSTR(movcc, pc, lr) b PLTJMP(syscall_error) # else + ldrcc r4, [sp], #4 + ldrcc r5, [sp], #4 + RETINSTR(movcc, pc, lr) cmn r0, $ENOSYS - ldmnefd sp!, {r4, r5, lr} - bne PLTJMP(syscall_error) + bne .Lerror /* The current kernel does not support mmap2. Fall back to plain mmap if the offset is small enough. */ - ldr r5, [sp, $20] + ldr r5, [sp, $16] mov r0, ip @ first arg was clobbered teq r5, $0 - ldmeqfd sp!, {r4, r5, lr} + ldreq r4, [sp], #4 + ldreq r5, [sp], #4 beq PLTJMP(__mmap) # endif .Linval: mov r0, $-EINVAL - ldmfd sp!, {r4, r5, lr} +.Lerror: + ldr r4, [sp], #4 + ldr r5, [sp], #4 b PLTJMP(syscall_error) #else /* The kernel headers do not support mmap2. Fall back to plain |