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* Fix typos - remove duplicate "the".brucec2011-02-211-1/+1
| | | | | | PR: bin/154928 Submitted by: Eitan Adler <lists at eitanadler.com> MFC after: 3 days
* Remove unneeded stdlib directories.ed2009-06-231-3/+0
| | | | | | | It's not necessary to add stdlib directories for each architecture, even if the architecture doesn't implement any files of its own. Submitted by: Christoph Mallon
* Mark uname(), getdomainname() and setdomainname() with COMPAT_FREEBSD4.ed2008-11-091-2/+1
| | | | | | | | | | | | | | | | | | | | | Looking at our source code history, it seems the uname(), getdomainname() and setdomainname() system calls got deprecated somewhere after FreeBSD 1.1, but they have never been phased out properly. Because we don't have a COMPAT_FREEBSD1, just use COMPAT_FREEBSD4. Also fix the Linuxolator to build without the setdomainname() routine by just making it call userland_sysctl on kern.domainname. Also replace the setdomainname()'s implementation to use this approach, because we're duplicating code with sysctl_domainname(). I wasn't able to keep these three routines working in our COMPAT_FREEBSD32, because that would require yet another keyword for syscalls.master (COMPAT4+NOPROTO). Because this routine is probably unused already, this won't be a problem in practice. If it turns out to be a problem, we'll just restore this functionality. Reviewed by: rdivacky, kib
* Add an alternative view of the bits in an 80-bit long double (64+16bde2008-01-171-1/+12
| | | | | | | | | | | | | | | | | | | | instead of 32+32+15+1) on all arches that have such long doubles (amd64, ia64 and i386). Large objects should be be accessed in large units, and the 32+32+15+1[+padding] decomposition asks for almost the opposite of that, sometimes resulting in very slow accesses depending on how well the compiler ignores what we ask for and converts to the best units for the given machine. E.g., on Athlons, there is a 10-20 cycle penalty for accessing the middle 32-bit word immediately after an 80-bit store. Whether actually using the alternative view is better is very machine- dependent. A 32+32+16 view is probably best with old 32-bit systems and gcc through 4.2.1. The compiler should mostly avoid the view and generate best accesses, but gcc-4.2.1 is far from doing that. I think 64+16 is best for now. Similarly for doubles -- they should be using 64+0 especially on 64-bit machines, but fdlibm uses 32+32 extensively for them. Fortunately, in 64-bit mode for doubles, gcc already ignores the 32+32-bit view and generates best accesses in many cases.
* Since nan() is supposed to work the same as strtod("nan(...)", NULL),das2007-12-181-3/+0
| | | | | | | | | | | | my original implementation made both use the same code. Unfortunately, this meant libm depended on a vendor header at compile time and previously- unexposed vendor bits in libc at runtime. Hence, I just wrote my own version of the relevant vendor routine. As it turns out, mine has a factor of 8 fewer of lines of code, and is a bit more readable anyway. The strtod() and *scanf() routines still use vendor code. Reviewed by: bde
* Export gdtoa's __ULto{x,Q}_D2A routine in a private namespace sodas2007-12-161-0/+3
| | | | libm can use it.
* Arrange so that the NaN returned by strtod("nan", NULL) is the same asdas2007-12-161-4/+4
| | | | the NaN returned by strtod("nan()", NULL).
* In scanf, round according to the current rounding mode.das2007-12-031-1/+1
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* The fork symbols aren't MD, they already live in sys/.yar2007-10-181-3/+0
| | | | | Found by: version_gen.awk Tested by: md5(1) (libc.so hasn't changed at all)
* Classify mmap, lseek, pread, pwrite, truncate, ftruncate as pseudopeter2007-07-041-3/+5
| | | | | | | | | | syscalls, unless WITHOUT_SYSCALL_COMPAT is defined. The default case will have the .c wrappers still. If you define WITHOUT_SYSCALL_COMPAT, the .c wrappers will go away and libc will make direct syscalls. After 7-stable starts, the direct syscall method will be default. Approved by: re (kensmith)
* Adjust the syscall stub macros to be consistent in their meaning. Inpeter2007-07-041-14/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | particular: SYSCALL() makes a syscall, with errno handling, and continues execution directly after the macro in the non-error case. RSYSCALL() is just like SYSCALL(), but returns after success. Both SYSCALL(name) and RSYSCALL(name) export "__sys_name" as a strong symbol, with "_name" and "name" as weak aliases. PSEUDO() is just like RSYSCALL(), but skipping the "name" weak alias. It still does "__sys_name" and "_name". Change i386 to add errno handling to PSEUDO. The same for amd64 and sparc64, with appear to have copied the behavior. ia64 was correct (as was alpha). Just remove some apparently unused variants of the macros. (untested!) I believe powerpc is correct. Fix arm to not export "name" from the PSEUDO case. Remove apparently extra unused variants. (untested!) The errno problem manifested on i386/amd64/sparc64 by having "PSEUDO" classified syscalls return without setting errno. eg: "addr = mmap()" could return with "addr" = 22 instead of setting errno to 22 and returning -1. Approved by: re (kensmith)
* Some libc symbol map cleanups.deischen2007-05-311-4/+0
| | | | | | | | | | | | | | | | | | | | | net: endhostdnsent is named _endhostdnsent and is private to netdb family of functions. posix1e: acl_size.c has been never compiled in, so there's no "acl_size". rpc: "getnetid" is a static function. stdtime: "gtime" is #ifdef'ed out in the source. some symbols are specific only to some architectures, e.g., ___tls_get_addr is only defined on i386. __htonl, __htons, __ntohl and __ntohs are no longer functions, they are now (internal) defines in <machine/endian.h>. Submitted by: ru
* Use C comments since we now preprocess these files with CPP.deischen2007-04-291-9/+11
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* The distinction between quiet and signaling NaN formats isdas2007-01-031-0/+21
| | | | | machine-dependent; these files tell the latest version of gdtoa what to do.
* Instead of re-implementing hton[ls] and friends for each arch, add a new MIcognet2006-11-067-243/+0
| | | | | | | file, net/ntoh.c, which just implement them using the inline functions from <sys/endian.h>. Suggested by: bde
* Prevent dead code elimination for the TP assignmient by using inlinemarcel2006-08-301-2/+1
| | | | assembly.
* Fix comment.ru2006-03-161-1/+1
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* Desupport the undocumented NO_QUAD option, just don't compileru2006-03-161-5/+0
| | | | the quad support on 64-bit platforms.
* Add each directory's symbol map file to SYM_MAPS.deischen2006-03-131-0/+1
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* Add symbol maps and initial symbol version definitions to libc.deischen2006-03-131-0/+77
| | | | Reviewed by: davidxu
* - Define LDBL_NBIT to be a mask indicating the position of the integerdas2005-03-071-2/+10
| | | | | | | | | bit in a long double. For architectures that don't have such a bit, LDBL_NBIT is 0. This makes it possible to say `mantissa & ~LDBL_NBIT' in places that previously used an #ifdef to select the right expression. The optimizer should dispense with the extra arithmetic when LDBL_NBIT is 0 anyway. - Add an XXX comment for the big endian case.
* Update my email address.das2005-02-061-1/+1
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* Replace the ldexp() implementation in libc with a renamed copy of thedas2005-01-221-137/+0
| | | | | | | | | | | | | | | | scalbn() implementation from libm. (The two functions are defined to be identical, but ldexp() lives in libc for backwards compatibility.) The old ldexp() implementation... - was more complicated than this one - set errno instead of raising FP exceptions - got some corner cases wrong (e.g. ldexp(1.0, 2000) in round-to-zero mode) The new implementation lives in libc/gen instead of libc/$MACHINE_ARCH/gen, since we don't need N copies of a machine-independent file. The amd64 and i386 platforms retain their fast and correct MD implementations and override this one.
* Eliminate gdtoa.mk and move its contents to ${MACHINE_ARCH}/Makefile.inc.das2005-01-152-5/+4
| | | | | The purpose of having a separate file involved an abandoned scheme that would have kept contrib/gdtoa out of the include path for the rest of libc.
* For variables that are only checked with defined(), don't provideru2004-10-241-1/+1
| | | | any fake value.
* Unbreak memmove(). Return the dst argument. While here, fix the ENDmarcel2004-09-041-7/+6
| | | | macro to actually reference memmove, not memcpy.
* Unbreak memcpy(). memcpy() is defined to return the dst argument.marcel2004-09-041-6/+5
| | | | | | By using r8 instead of r14 to do the swap, we put the dst argument in the return register. Since bcopy() doesn't clobber r8, we don't have to do anything else. This fixes ports/textproc/aspell.
* Make profiling actually work. The gcc compiler emits a call to themarcel2004-08-252-4/+79
| | | | | | | | | | | | | _mcount() stub when profiling is enabled. Emit this code sequence for assembly routines as welli (MCOUNT definition in <machine/asm.h>. We do not pass the GOT entry however as the 4th argument, because it's not used. The _mcount() stub calls __mcount(), which does the actual work. Define _MCOUNT_DECL to define __mcount. We do not have an implementation of mcount(), so we define MCOUNT as empty, but have a weak alias to _mcount() in _mcount.S. Note that the _mcount() stub in the kernel is slightly different from the stub in userland. This is because we do not have to worry about nested routines in the kernel.
* Add support for TLS in statically linked programs.dfr2004-08-152-1/+36
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* Make FLT_ROUNDS correctly reflect the dynamic rounding mode.das2004-07-192-1/+27
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* Replace seven nominally MD implementations of frexp() that are brokendas2004-07-182-57/+1
| | | | for subnormals with one implementation that works.
* Implement the classification macros isfinite(), isinf(), isnan(), anddas2004-07-092-70/+1
| | | | | | | | | | | | | | | | | | | | | isnormal() the hard way, rather than relying on fpclassify(). This is a lose in the sense that we need a total of 12 functions, but it is necessary for binary compatibility because we have never bumped libm's major version number. In particular, isinf(), isnan(), and isnanf() were BSD libc functions before they were C99 macros, so we can't reimplement them in terms of fpclassify() without adding a dependency on libc.so.5. I have tried to arrange things so that programs that could be compiled in FreeBSD 4.X will generate the same external references when compiled in 5.X. At the same time, the new macros should remain C99-compliant. The isinf() and isnan() functions remain in libc for historical reasons; however, I have moved the functions that implement the macros isfinite() and isnormal() to libm where they belong. Moreover, half a dozen MD versions of isinf() and isnan() have been replaced with MI versions that work equally well. Prodded by: kris
* Fix some aliasing problems.das2004-02-161-6/+14
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* style cleanup: Remove duplicate $FreeBSD$ tags.cperciva2004-02-102-4/+0
| | | | | | | | These files had tags after teh copyright notice, inside the comment block (incorrect, removed), and outside the comment block (correct). Approved by: rwatson (mentor)
* Define LDBL_MANH_SIZE and LDBL_MANL_SIZE to be the sizes of thedas2004-01-181-0/+3
| | | | high and low words of the mantissa in bits, respectively.
* Add required headers.nectar2004-01-062-0/+4
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* Virtual addresses in headers of ELF files for dynamic objects needmarcel2003-11-081-6/+9
| | | | to be relocated before they can be used as pointers.
* The FP status register allows for 6 traps to be masked. One of them,marcel2003-10-222-3/+3
| | | | | | | | | | | | the denormal/unnormal trap, is not a standard IEEE trap. We did not exclude it from being returned by fpgetmask(), nor did we make sure that fpsetmask() didn't clobber it. Since the non-IEEE trap is not part of fp_except_t, users of ifpgetmask()/fpsetmask() would be confronted with unexpected behaviour, one of which is a SIGFPE for denormal/unnormal FP results. This commit makes sure that we don't leak the denormal/unnormal mask bit in fp_except_t and also that we don't clobber it.
* Add the mlockall() and munlockall() system calls.bms2003-08-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | - All those diffs to syscalls.master for each architecture *are* necessary. This needed clarification; the stub code generation for mlockall() was disabled, which would prevent applications from linking to this API (suggested by mux) - Giant has been quoshed. It is no longer held by the code, as the required locking has been pushed down within vm_map.c. - Callers must specify VM_MAP_WIRE_HOLESOK or VM_MAP_WIRE_NOHOLES to express their intention explicitly. - Inspected at the vmstat, top and vm pager sysctl stats level. Paging-in activity is occurring correctly, using a test harness. - The RES size for a process may appear to be greater than its SIZE. This is believed to be due to mappings of the same shared library page being wired twice. Further exploration is needed. - Believed to back out of allocations and locks correctly (tested with WITNESS, MUTEX_PROFILING, INVARIANTS and DIAGNOSTIC). PR: kern/43426, standards/54223 Reviewed by: jake, alc Approved by: jake (mentor) MFC after: 2 weeks
* o There are 6 trap disable bits in ar.fpsr, not five. Even though wemarcel2003-08-092-4/+4
| | | | | | | | | | | | | didn't provide a constant for one of them (non-IEEE denormal trap), in an attempt to not support it probably, it's not we are left with the lower 5 bits. o Properly mask the passed or returned fp_except_t. Not doing so causes instant core dumps by trying to write an invalid value to ar.fpsr. Now that we're masking, stop using exclusive-or to invert bits. This fixes the illegal instruction fault encountered when building mozilla.
* Override the default stubs for getcontext(2) and swapcontext(2) somarcel2003-08-023-2/+80
| | | | | | | | | | | | | that we can flush the register stack prior to entering the kernel. This avoids having dirty registers and saves us from having to manually write them to the backing store from within the kernel. In that respect, flushing the RSE is both functionally required as well as performance optimal. On average we had 18 dirty registers when getcontext(2) was called from libthr. Since libthr does not switch back to a context created by getcontext(2), not having dealt with the dirty registers was harmless.
* The END() must expand to the .endp directive with the same name asmarcel2003-08-013-6/+5
| | | | | | | on the corresponding .proc directive, or the .endp must not have a name at all. While here, remove an artificial dependency in Ovfork.S by performing manual register renaming.
* Revert previous commit. We don't use setjmp()/longjmp() for contextmarcel2003-07-251-4/+2
| | | | | | switching anymore, so there's no need to save and restore GP. This change breaks threaded applications linked against libc_r. Pull the tier 2 card again: relink. This will link against libthr instead.
* Implement signalcontext(). Needed by libpthread (aka libkse).marcel2003-06-242-1/+123
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* o Fix a cut-n-paste bug. We were clobbering rp with gp...marcel2003-06-021-2/+2
| | | | | | o Make sure the arguments to ctx_wrapper() are loaded from the backing store by forcing an underflow. Do this by making all registers in the register frame local.
* Rough implement of makecontext() needed to support libthr.marcel2003-05-312-1/+122
| | | | | | | | | | | | | | o Up to 8 arguments are allowed. This is the number of arguments passed in registers. Subsequent registers are passed on the stack. Trying to deal with this is not easy in C and likely forces us to use assembly code. Let's avoid that for now. There's no indication that more than 8 arguments is a strong requirement (Linux also has an 8 argument limit). o We expect that the stack base is 16-byte aligned and the stack size is a multiple of 16-byte. We bomb out if this is not the case. We probably want to be less strict by enforcing it ourselves. For now it's better to not hide gross alignment bogons by silently correcting it.
* Revamp of the syscall path, exception and context handling. Themarcel2003-05-163-12/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | prime objectives are: o Implement a syscall path based on the epc inststruction (see sys/ia64/ia64/syscall.s). o Revisit the places were we need to save and restore registers and define those contexts in terms of the register sets (see sys/ia64/include/_regset.h). Secundairy objectives: o Remove the requirement to use contigmalloc for kernel stacks. o Better handling of the high FP registers for SMP systems. o Switch to the new cpu_switch() and cpu_throw() semantics. o Add a good unwinder to reconstruct contexts for the rare cases we need to (see sys/contrib/ia64/libuwx) Many files are affected by this change. Functionally it boils down to: o The EPC syscall doesn't preserve registers it does not need to preserve and places the arguments differently on the stack. This affects libc and truss. o The address of the kernel page directory (kptdir) had to be unstaticized for use by the nested TLB fault handler. The name has been changed to ia64_kptdir to avoid conflicts. The renaming affects libkvm. o The trapframe only contains the special registers and the scratch registers. For syscalls using the EPC syscall path no scratch registers are saved. This affects all places where the trapframe is accessed. Most notably the unaligned access handler, the signal delivery code and the debugger. o Context switching only partly saves the special registers and the preserved registers. This affects cpu_switch() and triggered the move to the new semantics, which additionally affects cpu_throw(). o The high FP registers are either in the PCB or on some CPU. context switching for them is done lazily. This affects trap(). o The mcontext has room for all registers, but not all of them have to be defined in all cases. This mostly affects signal delivery code now. The *context syscalls are as of yet still unimplemented. Many details went into the removal of the requirement to use contigmalloc for kernel stacks. The details are mostly CPU specific and limited to exception_save() and exception_restore(). The few places where we create, destroy or switch stacks were mostly simplified by not having to construct physical addresses and additionally saving the virtual addresses for later use. Besides more efficient context saving and restoring, which of course yields a noticable speedup, this also fixes the dreaded SMP bootup problem as a side-effect. The details of which are still not fully understood. This change includes all the necessary backward compatibility code to have it handle older userland binaries that use the break instruction for syscalls. Support for break-based syscalls has been pessimized in favor of a clean implementation. Due to the overall better performance of the kernel, this will still be notived as an improvement if it's noticed at all. Approved by: re@ (jhb)
* Add a comment describing why it's important for the values in thisdas2003-05-081-0/+7
| | | | | | file to be correct, and how to generate them automatically. Caused much pain and suffering for: peter
* Add __ldtoa(), a wrapper around gdtoa() to make it look like dtoa().das2003-04-051-0/+5
| | | | | | | In support of this, add some MD macros to assist in converting long doubles to the format expected by gdtoa(). Reviewed by: silence on standards@
* Replace our ancient dtoa/strtod implementation with the gdtoadas2003-03-122-0/+35
| | | | | | | | | | | | | | | | | | package, a more recent, generalized set of routines. Among the changes: - Declare strtof() and strtold() in stdlib.h. - Add glue to libc to support these routines for all kinds of ``long double''. - Update printf() to reflect the fact that dtoa works slightly differently now. As soon as I see that nothing has blown up, I will kill src/lib/libc/stdlib/strtod.c. Soon printf() will be able to use the new routines to output long doubles without loss of precision, but numerous bugs in the existing code must be addressed first. Reviewed by: bde (briefly), mike (mentor), obrien
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