Update.cvs/libc-ud-970813

1997-08-14 03:14  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dl-minimal.c: Don't use relative #include paths.
	(malloc): Don't try to initialize _dl_pagesize, it already is.
	(__sigjmp_save, longjmp): Reformat.

	* sysdeps/generic/dl-sysdep.c: Implement _dl_show_auxv function to
	show content of auxiliary array.
	(_dl_sysdep_start): Remember start of auxiliary vector.
	* sysdeps/mach/hurd/dl-sysdep.c: (_dl_show_auxv): New dummy function.
	* elf/link.h: Add prototype for _dl_show_auxv.
	* elf/rtld.c (dl_main): Call _dl_show_auxv if LD_SHOW_AUXV envvar
	is present.

	* libio/iofdopen.c: Better prepare for use in libstdc++.
	* libio/iofflush.c: Likewise.
	* libio/iofgetpos.c: Likewise.
	* libio/iofgets.c: Likewise.
	* libio/iofopen.c: Likewise.
	* libio/iofputs.c: Likewise.
	* libio/iofread.c: Likewise.
	* libio/iofsetpos.c: Likewise.
	* libio/ioftell.c: Likewise.
	* libio/iofwrite.c: Likewise.
	* libio/iogetdelim.c: Likewise.
	* libio/iogets.c: Likewise.
	* libio/iopopen.c: Likewise.
	* libio/ioputs.c: Likewise.
	* libio/iosetbuffer.c: Likewise.
	* libio/iosetvbuf.c: Likewise.
	* libio/ioungetc.c: Likewise.
	* libio/iovsprintf.c: Likewise.
	* libio/iovsscanf.c: Likewise.

	* manual/creature.texi: Mention _XOPEN_SOURCE_EXTENDED in correct
	place.

	* manual/math.texi: Add comment to sincos decsription to say it's a
	GNU extension.
	Fix description of random function.

	* posix/fnmatch.h: Recognize Windog by _WINDOWS32 not WIN32.
	* posix/glob.c: Likewise.  Handle stupid system headers on SunOS.
	Add casts for all __alloca calls.
	* posix/glob.h: Recognize Windog by _WINDOWS32 not WIN32.
	Declare additional GLOB_* constants also if _GNU_SOURCE is defined.
	Patches by Paul D. Smith <psmith@BayNetworks.COM>.

	* stdio-common/_itoa.c: Don't use relateive #include paths.

	* sysdeps/i386/fpu/bits/mathinline.h: Enable optimizations even for
	gcc 2.7.
	(atan): Loading 1.0 from memory does not pay off.
	(asinh): Fix typo.

1997-08-13 09:44  Philip Blundell  <Philip.Blundell@pobox.com>

	* sysdeps/stub/accept.c: Use socklen_t where necessary.
	* sysdeps/stub/bind.c: Likewise.
	* sysdeps/stub/connect.c: Likewise.
	* sysdeps/stub/getsockname.c: Likewise.
	* sysdeps/stub/getsockopt.c: Likewise.
	* sysdeps/stub/recvfrom.c: Likewise.
	* sysdeps/stub/sendto.c: Likewise.
	* sysdeps/stub/setsockopt.c: Likewise.

1997-08-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* io/ftw.c (object_compare): Avoid memcmp when comparing scalar
	types.

1997-08-12  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* math/libm-test.c (cbrt_test): Add epsilon for long double to
	`cbrt (-0.001)'.

1997-08-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/stub/bits/string.h: Fix comment.

1997-08-01  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/Makefile (routines): Remove dl-version.
	(dl-routines): Add it here instead.  This removes dead code from
	libc.so.

1997-08-12 17:17  Wolfram Gloger  <wmglo@dent.med.uni-muenchen.de>

	* malloc/thread-m.h (thread_atfork, thread_atfork_static): New
	macros to encapsulate pthread_atfork's functionality.
	* malloc/malloc.c (ptmalloc_lock_all, ptmalloc_unlock_all): New
	functions, registered via thread_atfork in the initialization
	routine or via thread_atfork_static in global scope.  This
	ensures a consistent state of all locks across fork().

1997-08-11 23:00:32 1997  Mark Kettenis  <kettenis@phys.uva.nl>

	* login/programs/xtmp.c (compare_entry):
	Partially undo patch made by Klaus Espenlaub.  There
	was no xtmp/utmp typo.  Added comment to cclarify this.
	* login/programs/xtmp.h: Likewise.

	* posix/getopt.c: Recognize Windog by _WINDOWS32 not WIN32.
	Patch by Paul D. Smith <psmith@BayNetworks.COM>.

1997-08-12 13:51  Ulrich Drepper  <drepper@cygnus.com>

	* login/getutid.c: Rename to __getutid and make getutid and getutxid
	weak aliases.
	Patch by ir. Mark M._Kettenis <kettenis@phys.uva.nl>.

1997-08-11 23:55  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/Makefile [subdir=misc] (sysdep_headers):
	Add bits/mman.h.

1997-08-11 08:51:21 1997  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* stdlib/fmtmsg.c (fmtmsg): Add static to
	__libc_once_define macro.

	* libc.map (__progname_full, __progname): Added.

1997-08-04 08:31  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* sysdeps/unix/sysv/linux/if_index.c (if_nametoindex): Return 0
	if SIOGIFINDEX is not defined.
	(if_indextoname): Initialize "result" to NULL.
	(if_nametoindex, if_nameindex): Fix ENOSYS setting.

1997-08-11 11:58  Richard Henderson  <rth@cygnus.com>

	Sparc ISO C 9x exception handling:
	* sysdeps/sparc/fpu/bits/mathdef.h: New file.
	* sysdeps/sparc/fpu/fclrexcpt.c: New file.
	* sysdeps/sparc/fpu/fegetenv.c: New file.
	* sysdeps/sparc/fpu/fegetround.c: New file.
	* sysdeps/sparc/fpu/feholdexcpt.c: New file.
	* sysdeps/sparc/fpu/fesetenv.c: New file.
	* sysdeps/sparc/fpu/fesetround.c: New file.
	* sysdeps/sparc/fpu/feupdateenv.c: New file.
	* sysdeps/sparc/fpu/fgetexcptflg.c: New file.
	* sysdeps/sparc/fpu/fraiseexcpt.c: New file.
	* sysdeps/sparc/fpu/fsetexcptflg.c: New file.
	* sysdeps/sparc/fpu/ftestexcept.c: New file.
	* sysdeps/sparc/sparc32/fpu/bits/fenv.h: New file.
	* sysdeps/sparc/sparc64/fpu/bits/fenv.h: New file.

1997-08-11 11:58  Richard Henderson  <rth@cygnus.com>

	Sparc64 merge:
	* configure.in: Change up subdirectories, rename sparc8->sparcv8.

	* csu/Makefile: Nuke need-nopic-initfini bits.  The problem was
	that sparc64 ld did not recognize pic relocs at all.

	* elf/dl-deps.c: Include <string.h>.
	* elf/do-rel.h (elf_dynamic_do_rel): Take reloc address and size
	directly instead of the DT names to get them from.
	* elf/dynamic-link.h (_ELF_DYNAMIC_DO_RELOC): New macro distilled
	from ELF_DYNAMIC_DO_REL{,A}.  Define a second version that accounts
	for the possibility that DT_RELA and DT_JMPPLT overlap, as such is
	the case on the Sparc.

	* elf/elf.h: Stub out Elf64_Ver*, and make them the same as the
	Elf32_Ver* bits.  The linker does not even know to differentiate
	between the word sizes.  Someone should examine this and figure
	out what the proper sizes of things should be for 64-bit hosts
	before the sparc64 libraries are distributed.

	* shlib-versions: Rename sparc64 ld.so to not conflict with sparc32
	on the same machine.

	Move old sysdeps/sparc contents to sysdeps/sparc/sparc32,
	rename sparc8 subdir to sparcv8, move sysdeps/sparc64 content to
	sysdeps/sparc/sparc64.  Same for sysdeps/unix/sysv/linux/sparc.

	* sysdeps/sparc/Implies: Do ieee754 here.
	* sysdeps/sparc/configure.in: Move from sparc32/.
	* sysdeps/sparc/sparc32/Implies: Do wordsize here.
	* sysdeps/sparc/sparc64/Implies: Likewise.

	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_load_address):
	Use uninitialized .got to find load address instead of AT_BASE, as
	the later does not exist when running ld.so directly.

	* sysdeps/sparc/sparc32/fpu/fpu_control.h: Move from ../.
	* sysdeps/sparc/sparc64/fpu/fpu_control.h: Likewise.

	* sysdeps/sparc/sparc32/udiv_qrnnd.S: Clean up PIC support.

	* sysdeps/sparc/sparc64/Makefile (sysdep_routines): Add s_finitel
	and s_signbitl for stdio.
	* sysdeps/sparc/sparc64/configure.in: Remove, we no longer need
	nopic_initfini.

	* sysdeps/sparc/sparc64/bsd-_setjmp.S: Remove.
	* sysdeps/sparc/sparc64/bsd-setjmp.S: Remove.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bsd-_setjmp.S: New empty file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bsd-setjmp.S: New empty file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S: Add __longjmp alias.
	* sysdeps/unix/sysv/linux/sparc/sparc64/setjmp.S: Add weak _setjmp
	and setjmp entry points.

	* sysdeps/sparc/sparc64/dl-machine.h: Finish real implementation.

	* sysdeps/sparc/sparc64/elf/crtbegin.S: Add copyright, fix PIC.
	* sysdeps/sparc/sparc64/elf/crtend.S: Likewise.

	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h (struct sigaction):
	Fix sa_flags size for sparc64; add sa_restorer for kernel.

	* sysdeps/unix/sysv/linux/sparc/sparc64/brk.S: Fix PIC.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/init-first.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h: Likewise.

	* sysdeps/unix/sysv/linux/sparc/sparc64/syscall.S: New file.

1997-08-10 18:29:08 1997  Mark Kettenis  <kettenis@phys.uva.nl>

	* login/login.c (login): Check for correct return value of
	utmpname.

1997-08-11 16:49  Ulrich Drepper  <drepper@cygnus.com>

	* time/tzset.c (__tzset_internal): Correctly handle TZ strings
	following incorrect old POSIX specs.
	Patch by Paul Eggert <eggert@twinsun.com>.

	* sysdeps/generic/bits/sigaction.h: Correct comment for SA_RESTART.
	* sysdeps/unix/bsd/osf/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/minix/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/sigaction.h: Likewise.
	Reported by NIIBE Yutaka <gniibe@mri.co.jp>.

1997-08-09  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* manual/math.texi: Define the macros @mul and @infinity and use
	them to format the multiplication and infinity signs.
	(FP Comparison Functions): Use @code, not @math, for C code
	examples.

	* elf/dl-profile.c: Add descriptions and implement reading of

1 files changed, 238 insertions, 0 deletions

diff --git a/sysdeps/sparc/sparc32/divrem.m4 b/sysdeps/sparc/sparc32/divrem.m4
new file mode 100644
index 0000000000..665abf11ae
--- /dev/null
+++ b/sysdeps/sparc/sparc32/divrem.m4
@@ -0,0 +1,238 @@
+/*
+ * Division and remainder, from Appendix E of the Sparc Version 8
+ * Architecture Manual, with fixes from Gordon Irlam.
+ */
+
+/*
+ * Input: dividend and divisor in %o0 and %o1 respectively.
+ *
+ * m4 parameters:
+ *  NAME	name of function to generate
+ *  OP		OP=div => %o0 / %o1; OP=rem => %o0 % %o1
+ *  S		S=true => signed; S=false => unsigned
+ *
+ * Algorithm parameters:
+ *  N		how many bits per iteration we try to get (4)
+ *  WORDSIZE	total number of bits (32)
+ *
+ * Derived constants:
+ *  TOPBITS	number of bits in the top `decade' of a number
+ *
+ * Important variables:
+ *  Q		the partial quotient under development (initially 0)
+ *  R		the remainder so far, initially the dividend
+ *  ITER	number of main division loop iterations required;
+ *		equal to ceil(log2(quotient) / N).  Note that this
+ *		is the log base (2^N) of the quotient.
+ *  V		the current comparand, initially divisor*2^(ITER*N-1)
+ *
+ * Cost:
+ *  Current estimate for non-large dividend is
+ *	ceil(log2(quotient) / N) * (10 + 7N/2) + C
+ *  A large dividend is one greater than 2^(31-TOPBITS) and takes a
+ *  different path, as the upper bits of the quotient must be developed
+ *  one bit at a time.
+ */
+
+define(N, `4')dnl
+define(WORDSIZE, `32')dnl
+define(TOPBITS, eval(WORDSIZE - N*((WORDSIZE-1)/N)))dnl
+dnl
+define(dividend, `%o0')dnl
+define(divisor, `%o1')dnl
+define(Q, `%o2')dnl
+define(R, `%o3')dnl
+define(ITER, `%o4')dnl
+define(V, `%o5')dnl
+dnl
+dnl m4 reminder: ifelse(a,b,c,d) => if a is b, then c, else d
+define(T, `%g1')dnl
+define(SC, `%g7')dnl
+ifelse(S, `true', `define(SIGN, `%g6')')dnl
+
+dnl
+dnl This is the recursive definition for developing quotient digits.
+dnl
+dnl Parameters:
+dnl  $1	the current depth, 1 <= $1 <= N
+dnl  $2	the current accumulation of quotient bits
+dnl  N	max depth
+dnl
+dnl We add a new bit to $2 and either recurse or insert the bits in
+dnl the quotient.  R, Q, and V are inputs and outputs as defined above;
+dnl the condition codes are expected to reflect the input R, and are
+dnl modified to reflect the output R.
+dnl
+define(DEVELOP_QUOTIENT_BITS,
+`	! depth $1, accumulated bits $2
+	bl	L.$1.eval(2**N+$2)
+	srl	V,1,V
+	! remainder is positive
+	subcc	R,V,R
+	ifelse($1, N,
+	`	b	9f
+		add	Q, ($2*2+1), Q
+	', `	DEVELOP_QUOTIENT_BITS(incr($1), `eval(2*$2+1)')')
+L.$1.eval(2**N+$2):
+	! remainder is negative
+	addcc	R,V,R
+	ifelse($1, N,
+	`	b	9f
+		add	Q, ($2*2-1), Q
+	', `	DEVELOP_QUOTIENT_BITS(incr($1), `eval(2*$2-1)')')
+	ifelse($1, 1, `9:')')dnl
+
+#include "sysdep.h"
+#ifdef __linux__
+#include <asm/traps.h>
+#else
+#ifdef __svr4__
+#include <sys/trap.h>
+#else
+#include <machine/trap.h>
+#endif
+#endif
+
+FUNC(NAME)
+ifelse(S, `true',
+`	! compute sign of result; if neither is negative, no problem
+	orcc	divisor, dividend, %g0	! either negative?
+	bge	2f			! no, go do the divide
+ifelse(OP, `div',
+`	xor	divisor, dividend, SIGN	! compute sign in any case',
+`	mov	dividend, SIGN		! sign of remainder matches dividend')
+	tst	divisor
+	bge	1f
+	tst	dividend
+	! divisor is definitely negative; dividend might also be negative
+	bge	2f			! if dividend not negative...
+	sub	%g0, divisor, divisor	! in any case, make divisor nonneg
+1:	! dividend is negative, divisor is nonnegative
+	sub	%g0, dividend, dividend	! make dividend nonnegative
+2:
+')
+	! Ready to divide.  Compute size of quotient; scale comparand.
+	orcc	divisor, %g0, V
+	bne	1f
+	mov	dividend, R
+
+		! Divide by zero trap.  If it returns, return 0 (about as
+		! wrong as possible, but that is what SunOS does...).
+		ta	ST_DIV0
+		retl
+		clr	%o0
+
+1:
+	cmp	R, V			! if divisor exceeds dividend, done
+	blu	Lgot_result		! (and algorithm fails otherwise)
+	clr	Q
+	sethi	%hi(1 << (WORDSIZE - TOPBITS - 1)), T
+	cmp	R, T
+	blu	Lnot_really_big
+	clr	ITER
+
+	! `Here the dividend is >= 2**(31-N) or so.  We must be careful here,
+	! as our usual N-at-a-shot divide step will cause overflow and havoc.
+	! The number of bits in the result here is N*ITER+SC, where SC <= N.
+	! Compute ITER in an unorthodox manner: know we need to shift V into
+	! the top decade: so do not even bother to compare to R.'
+	1:
+		cmp	V, T
+		bgeu	3f
+		mov	1, SC
+		sll	V, N, V
+		b	1b
+		add	ITER, 1, ITER
+
+	! Now compute SC.
+	2:	addcc	V, V, V
+		bcc	Lnot_too_big
+		add	SC, 1, SC
+
+		! We get here if the divisor overflowed while shifting.
+		! This means that R has the high-order bit set.
+		! Restore V and subtract from R.
+		sll	T, TOPBITS, T	! high order bit
+		srl	V, 1, V		! rest of V
+		add	V, T, V
+		b	Ldo_single_div
+		sub	SC, 1, SC
+
+	Lnot_too_big:
+	3:	cmp	V, R
+		blu	2b
+		nop
+		be	Ldo_single_div
+		nop
+	/* NB: these are commented out in the V8-Sparc manual as well */
+	/* (I do not understand this) */
+	! V > R: went too far: back up 1 step
+	!	srl	V, 1, V
+	!	dec	SC
+	! do single-bit divide steps
+	!
+	! We have to be careful here.  We know that R >= V, so we can do the
+	! first divide step without thinking.  BUT, the others are conditional,
+	! and are only done if R >= 0.  Because both R and V may have the high-
+	! order bit set in the first step, just falling into the regular
+	! division loop will mess up the first time around.
+	! So we unroll slightly...
+	Ldo_single_div:
+		subcc	SC, 1, SC
+		bl	Lend_regular_divide
+		nop
+		sub	R, V, R
+		mov	1, Q
+		b	Lend_single_divloop
+		nop
+	Lsingle_divloop:
+		sll	Q, 1, Q
+		bl	1f
+		srl	V, 1, V
+		! R >= 0
+		sub	R, V, R
+		b	2f
+		add	Q, 1, Q
+	1:	! R < 0
+		add	R, V, R
+		sub	Q, 1, Q
+	2:
+	Lend_single_divloop:
+		subcc	SC, 1, SC
+		bge	Lsingle_divloop
+		tst	R
+		b,a	Lend_regular_divide
+
+Lnot_really_big:
+1:
+	sll	V, N, V
+	cmp	V, R
+	bleu	1b
+	addcc	ITER, 1, ITER
+	be	Lgot_result
+	sub	ITER, 1, ITER
+
+	tst	R	! set up for initial iteration
+Ldivloop:
+	sll	Q, N, Q
+	DEVELOP_QUOTIENT_BITS(1, 0)
+Lend_regular_divide:
+	subcc	ITER, 1, ITER
+	bge	Ldivloop
+	tst	R
+	bl,a	Lgot_result
+	! non-restoring fixup here (one instruction only!)
+ifelse(OP, `div',
+`	sub	Q, 1, Q
+', `	add	R, divisor, R
+')
+
+Lgot_result:
+ifelse(S, `true',
+`	! check to see if answer should be < 0
+	tst	SIGN
+	bl,a	1f
+	ifelse(OP, `div', `sub %g0, Q, Q', `sub %g0, R, R')
+1:')
+	retl
+	ifelse(OP, `div', `mov Q, %o0', `mov R, %o0')