-/* $OpenBSD: SYS.h,v 1.25 2020/11/28 19:49:30 gkoehler Exp $ */
+/* $OpenBSD: SYS.h,v 1.26 2022/06/10 01:56:02 guenther Exp $ */
/*-
* Copyright (c) 1994
* Andrew Cagney. All rights reserved.
/* r0 will be a non zero errno if there was an error, while r3/r4 will
contain the return value */
-#include "machine/asm.h"
+#include "DEFS.h"
/* offsetof(struct tib, tib_errno) - offsetof(struct tib, __tib_tcb) */
/* offset of errno from %r2 */
#define R2_OFFSET_ERRNO (-TCB_OFFSET + TCB_OFFSET_ERRNO)
-/*
- * We define a hidden alias with the prefix "_libc_" for each global symbol
- * that may be used internally. By referencing _libc_x instead of x, other
- * parts of libc prevent overriding by the application and avoid unnecessary
- * relocations.
- */
-#define _HIDDEN(x) _libc_##x
-#define _HIDDEN_ALIAS(x,y) \
- STRONG_ALIAS(_HIDDEN(x),y); \
- .hidden _HIDDEN(x)
-#define _HIDDEN_FALIAS(x,y) \
- _HIDDEN_ALIAS(x,y); \
- .type _HIDDEN(x),@function
-
-/*
- * For functions implemented in ASM that aren't syscalls.
- * END_STRONG(x) Like DEF_STRONG() in C; for standard/reserved C names
- * END_WEAK(x) Like DEF_WEAK() in C; for non-ISO C names
- */
-#define END_STRONG(x) END(x); _HIDDEN_FALIAS(x,x); END(_HIDDEN(x))
-#define END_WEAK(x) END_STRONG(x); .weak x
-
#define SYSENTRY(x) WEAK_ALIAS(x, _thread_sys_ ## x); \
ENTRY(_thread_sys_ ## x)
#define SYSENTRY_HIDDEN(x) ENTRY(_thread_sys_ ## x)
-/* $OpenBSD: memmove.S,v 1.4 2020/11/28 19:49:30 gkoehler Exp $ */
+/* $OpenBSD: memmove.S,v 1.5 2022/06/10 01:56:02 guenther Exp $ */
/* $NetBSD: memmove.S,v 1.3 2011/01/15 07:31:12 matt Exp $ */
/* stropt/memmove.S, pl_string_common, pl_linux 10/11/04 11:45:37
* ==========================================================================
*/
-#include "SYS.h"
+#include "DEFS.h"
.text
ENTRY(memcpy)
RETGUARD_SETUP(memmove, %r11, %r12)
mr %r8, %r3 /* Save dst (return value) */
- b fwd
+ b .Lfwd
#endif
/* void bcopy(void *, void *, size_t) */
-ENTRY(bcopy)
+ENTRY_NB(bcopy)
mr %r6, %r3 /* swap src/dst */
mr %r3, %r4
mr %r4, %r6
mr %r8, %r3 /* Save dst (return value) */
cmpw %r4, %r8 /* Branch to reverse if */
- blt reverse /* src < dest. Don't want to */
+ blt .Lreverse /* src < dest. Don't want to */
/* overwrite end of src with */
/* start of dest */
-fwd:
+.Lfwd:
addi %r4, %r4, -4 /* Back up src and dst pointers */
addi %r8, %r8, -4 /* due to auto-update of 'load' */
srwi. %r9,%r5,2 /* How many words in total cnt */
- beq- last1 /* Handle byte by byte if < 4 */
+ beq- .Llast1 /* Handle byte by byte if < 4 */
/* bytes total */
mtctr %r9 /* Count of words for loop */
lwzu %r7, 4(%r4) /* Preload first word */
- b g1
+ b .Lg1
-g0: /* Main loop */
+.Lg0: /* Main loop */
lwzu %r7, 4(%r4) /* Load a new word */
stwu %r6, 4(%r8) /* Store previous word */
-g1:
+.Lg1:
- bdz- last /* Dec cnt, and branch if just */
+ bdz- .Llast /* Dec cnt, and branch if just */
/* one word to store */
lwzu %r6, 4(%r4) /* Load another word */
stwu %r7, 4(%r8) /* Store previous word */
- bdnz+ g0 /* Dec cnt, and loop again if */
+ bdnz+ .Lg0 /* Dec cnt, and loop again if */
/* more words */
mr %r7, %r6 /* If word count -> 0, then... */
-last:
+.Llast:
stwu %r7, 4(%r8) /* ... store last word */
-last1: /* Byte-by-byte copy */
+.Llast1: /* Byte-by-byte copy */
clrlwi. %r5,%r5,30 /* If count -> 0, then ... */
- beq done /* we're done */
+ beq .Ldone /* we're done */
mtctr %r5 /* else load count for loop */
lbzu %r6, 4(%r4) /* 1st byte: update addr by 4 */
stbu %r6, 4(%r8) /* since we pre-adjusted by 4 */
- bdz- done /* in anticipation of main loop */
+ bdz- .Ldone /* in anticipation of main loop */
-last2:
+.Llast2:
lbzu %r6, 1(%r4) /* But handle the rest by */
stbu %r6, 1(%r8) /* updating addr by 1 */
- bdnz+ last2
- b done
+ bdnz+ .Llast2
+ b .Ldone
/* We're here since src < dest. Don't want to overwrite end of */
/* src with start of dest */
-reverse:
+.Lreverse:
add %r4, %r4, %r5 /* Work from end to beginning */
add %r8, %r8, %r5 /* so add count to string ptrs */
srwi. %r9,%r5,2 /* Words in total count */
- beq- rlast1 /* Handle byte by byte if < 4 */
+ beq- .Lrlast1 /* Handle byte by byte if < 4 */
/* bytes total */
mtctr %r9 /* Count of words for loop */
lwzu %r7, -4(%r4) /* Preload first word */
- b rg1
+ b .Lrg1
-rg0: /* Main loop */
+.Lrg0: /* Main loop */
lwzu %r7, -4(%r4) /* Load a new word */
stwu %r6, -4(%r8) /* Store previous word */
-rg1:
+.Lrg1:
- bdz- rlast /* Dec cnt, and branch if just */
+ bdz- .Lrlast /* Dec cnt, and branch if just */
/* one word to store */
lwzu %r6, -4(%r4) /* Load another word */
stwu %r7, -4(%r8) /* Store previous word */
- bdnz+ rg0 /* Dec cnt, and loop again if */
+ bdnz+ .Lrg0 /* Dec cnt, and loop again if */
/* more words */
mr %r7, %r6 /* If word count -> 0, then... */
-rlast:
+.Lrlast:
stwu %r7, -4(%r8) /* ... store last word */
-rlast1: /* Byte-by-byte copy */
+.Lrlast1: /* Byte-by-byte copy */
clrlwi. %r5,%r5,30 /* If count -> 0, then... */
- beq done /* ... we're done */
+ beq .Ldone /* ... we're done */
mtctr %r5 /* else load count for loop */
-rlast2:
+.Lrlast2:
lbzu %r6, -1(%r4) /* Handle the rest, byte by */
stbu %r6, -1(%r8) /* byte */
- bdnz+ rlast2 /* Dec ctr, and branch if more */
+ bdnz+ .Lrlast2 /* Dec ctr, and branch if more */
/* bytes left */
-done:
+.Ldone:
RETGUARD_CHECK(memmove, %r11, %r12)
blr
END_STRONG(memmove)
projects / openbsd / commitdiff