| Commit message (Expand) | Author | Files | Lines |
|---|
| 2013-10-07 | minor vfprintf and vfwprintf changes to please static code analyzers•••add missing va_end and remove some unnecessary code.
| Szabolcs Nagy | 2 | -6/+11 |
| 2013-10-06 | math: remove an unused variable from modfl | Szabolcs Nagy | 1 | -1/+0 |
| 2013-10-05 | slightly optimize __brk for size•••there is no reason to check the return value for setting errno, since
brk never returns errors, only the new value of the brk (which may be
the same as the old, or otherwise differ from the requested brk, on
failure).
it may be beneficial to eventually just eliminate this file and make
the syscalls inline in malloc.c.
| Rich Felker | 1 | -1/+1 |
| 2013-10-05 | fix failure of malloc to set errno on heap (brk) exhaustion•••I wrongly assumed the brk syscall would set errno, but on failure it
returns the old value of the brk rather than an error code.
| Rich Felker | 1 | -0/+1 |
| 2013-10-04 | fix failure to check malloc result in setenv | Rich Felker | 1 | -9/+9 |
| 2013-10-04 | math: remove code duplication in erfl found by clang analyzer•••erfl had some superflous code left around after the last erf cleanup.
the issue was reported by Alexander Monakov
| Szabolcs Nagy | 1 | -13/+2 |
| 2013-10-04 | math: remove a useless assignment in lgammal found by clang analyzer•••the issue was reported by Alexander Monakov
| Szabolcs Nagy | 1 | -2/+2 |
| 2013-10-04 | fix invalid implicit pointer conversion in pthread_key_create | Rich Felker | 1 | -1/+1 |
| 2013-10-04 | fix uninitialized variable in dladdr•••the affected branch only applies for DSOs that lack standard hash
table and only have the GNU hash table present.
| Rich Felker | 1 | -1/+1 |
| 2013-10-04 | removed unused variable in vfwprintf | Rich Felker | 1 | -2/+1 |
| 2013-10-03 | fix new environment always being null with execle•••the va_arg call for the argv[]-terminating null pointer was missing,
so this pointer was being wrongly used as the environment pointer.
issue reported by Timo Teräs. proposed patch slightly modified to
simplify the resulting code.
| Rich Felker | 1 | -2/+1 |
| 2013-09-29 | fix off-by-one error in getgrnam_r and getgrgid_r, clobbering gr_name•••bug report and patch by Michael Forney. the terminating null pointer
at the end of the gr_mem array was overwriting the beginning of the
string data, causing the gr_name member to always be a zero-length
string.
| Rich Felker | 1 | -2/+2 |
| 2013-09-27 | fix buffer overflow in mbsrtowcs•••issue reported by Michael Forney:
"If wn becomes 0 after processing a chunk of 4, mbsrtowcs currently
continues on, wrapping wn around to -1, causing the rest of the string
to be processed.
This resulted in buffer overruns if there was only space in ws for wn
wide characters."
the original patch submitted added an additional check for !wn after
the loop; to avoid extra branching, I instead just changed the wn>=4
check to wn>=5 to ensure that at least one slot remains after the
word-at-a-time loop runs. this should not slow down the tail
processing on real-world usage, since an extra slot that can't be
processed in the word-at-a-time loop is needed for the null
termination anyway.
| Rich Felker | 1 | -1/+1 |
| 2013-09-27 | math: fix comparision macros (isless etc) when FLT_EVAL_METHOD!=0•••This is a change in ISO C11 annex F (F.10.11p1), comparision macros
can't round their arguments to their semantic type when the evaluation
format has wider range and precision. (ie. they must be consistent with
the builtin relational operators)
| Szabolcs Nagy | 1 | -10/+10 |
| 2013-09-26 | add missing i386 syscall numbers•••somehow the range 335-339 was missed when updating the file.
| Rich Felker | 1 | -0/+10 |
| 2013-09-26 | remove duplicate lines from mips bits/syscall.h | Rich Felker | 1 | -48/+0 |
| 2013-09-23 | release notes for 0.9.14 | Rich Felker | 1 | -0/+30 |
| 2013-09-22 | fix arm atomic store and generate simpler/less-bloated/faster code•••atomic store was lacking a barrier, which was fine for legacy arm with
no real smp and kernel-emulated cas, but unsuitable for more modern
systems. the kernel provides another "kuser" function, at 0xffff0fa0,
which could be used for the barrier, but using that would drop support
for kernels 2.6.12 through 2.6.14 unless an extra conditional were
added to check for barrier availability. just using the barrier in the
kernel cas is easier, and, based on my reading of the assembly code in
the kernel, does not appear to be significantly slower.
at the same time, other atomic operations are adapted to call the
kernel cas function directly rather than using a_cas; due to small
differences in their interface contracts, this makes the generated
code much simpler.
| Rich Felker | 1 | -6/+8 |
| 2013-09-20 | fix potential deadlock bug in libc-internal locking logic•••if a multithreaded program became non-multithreaded (i.e. all other
threads exited) while one thread held an internal lock, the remaining
thread would fail to release the lock. the the program then became
multithreaded again at a later time, any further attempts to obtain
the lock would deadlock permanently.
the underlying cause is that the value of libc.threads_minus_1 at
unlock time might not match the value at lock time. one solution would
be returning a flag to the caller indicating whether the lock was
taken and needs to be unlocked, but there is a simpler solution: using
the lock itself as such a flag.
note that this flag is not needed anyway for correctness; if the lock
is not held, the unlock code is harmless. however, the memory
synchronization properties associated with a_store are costly on some
archs, so it's best to avoid executing the unlock code when it is
unnecessary.
| Rich Felker | 3 | -13/+15 |
| 2013-09-20 | correct the sysconf value for RTSIG_MAX•••this is the number of realtime signals available, not the maximum
signal number or total number of signals.
| Rich Felker | 1 | -1/+2 |
| 2013-09-16 | fix sigemptyset and sigfillset for mips•••they were leaving junk in the upper bits.
| Rich Felker | 2 | -1/+10 |
| 2013-09-16 | fix clobbering of caller's stack in mips __clone function•••this was resulting in crashes in posix_spawn on mips, and would have
affected applications calling clone too. since the prototype for
__clone has it as a variadic function, it may not assume that 16($sp)
is writable for use in making the syscall. instead, it needs to
allocate additional stack space, and then adjust the stack pointer
back in both of the code paths for the parent process/thread.
| Rich Felker | 1 | -0/+3 |
| 2013-09-16 | sys/resource.h: add PRIO_MIN and PRIO_MAX for getpriority and setpriority•••These constants are not specified by POSIX, but they are in the reserved
namespace, glibc and bsd systems seem to provide them as well.
(Note that POSIX specifies -NZERO and NZERO-1 to be the limits, but
PRIO_MAX equals NZERO)
| Szabolcs Nagy | 1 | -0/+3 |
| 2013-09-16 | update include/elf.h following glibc changes•••the changes were verified using various sources:
linux: include/uapi/linux/elf.h
binutils: include/elf/common.h
glibc: elf/elf.h
sysv gabi: http://www.sco.com/developers/gabi/latest/contents.html
sun linker docs: http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
and platform specific docs
- fixed:
EF_MIPS_* E_MIPS_* e_flags: fixed accoding to glibc and binutils
- added:
ELFOSABI_GNU for EI_OSABI entry: glibc, binutils and sysv gabi
EM_* e_machine values: updated according to linux and glibc
PN_XNUM e_phnum value: from glibc and linux, see oracle docs
NT_* note types: updated according to linux and glibc
DF_1_* flags for DT_FLAGS_1 entry: following glibc and oracle docs
AT_HWCAP2 auxv entry for more hwcap bits accoding to linux and glibc
R_386_SIZE32 relocation according to glibc and binutils
EF_ARM_ABI_FLOAT_* e_flags: added following glibc and binutils
R_AARCH64_* relocs: added following glibc and aarch64 elf specs
R_ARM_* relocs: according to glibc, binutils and arm elf specs
R_X86_64_* relocs: added missing relocs following glibc
- removed:
HWCAP_SPARC_* flags were moved to arch specific header in glibc
R_ARM_SWI24 reloc is marked as obsolete in glibc, not present in binutils
not specified in arm elf spec, R_ARM_TLS_DESC reused its number
see http://www.codesourcery.com/publications/RFC-TLSDESC-ARM.txt
- glibc changes not pulled in:
ELFOSABI_ARM_AEABI (bare-metal system, binutils and glibc disagrees about the name)
R_68K_* relocs for unsupported platform
R_SPARC_* ditto
EF_SH* ditto (e_flags)
EF_S390* ditto (e_flags)
R_390* ditto
R_MN10300* ditto
R_TILE* ditto
| Szabolcs Nagy | 1 | -27/+143 |
| 2013-09-16 | omit CLONE_PARENT flag to clone in pthread_create•••CLONE_PARENT is not necessary (CLONE_THREAD provides all the useful
parts of it) and Linux treats CLONE_PARENT as an error in certain
situations, without noticing that it would be a no-op due to
CLONE_THREAD. this error case prevents, for example, use of a
multi-threaded init process and certain usages with containers.
| Rich Felker | 1 | -1/+1 |
| 2013-09-16 | use symbolic names for clone flags in pthread_create | Rich Felker | 1 | -2/+5 |
| 2013-09-15 | sys/socket.h: add new SO_BUSY_POLL socket option•••low latency busy poll sockets are new in linux v3.11
| Szabolcs Nagy | 1 | -0/+1 |
| 2013-09-15 | ptrace.h: add new ptrace requests to get/set sigmask•••PTRACE_GETSIGMASK and PTRACE_SETSIGMASK were added in linux v3.11
and used by checkpoint/restore tools
| Szabolcs Nagy | 1 | -0/+2 |
| 2013-09-15 | net/if_arp.h: add missing ARP hardware identifiers from linux uapi headers•••the removed ARPHRD_IEEE802154_PHY was only present in the kernel api
in v2.6.31 (by accident), but it got into the glibc headers (in 2009)
and remained there since this header was not updated since then.
| Szabolcs Nagy | 1 | -1/+7 |
| 2013-09-15 | netinet/in.h: add missing IP protocol numbers from the linux uapi headers | Szabolcs Nagy | 1 | -0/+2 |
| 2013-09-15 | support configurable page size on mips, powerpc and microblaze•••PAGE_SIZE was hardcoded to 4096, which is historically what most
systems use, but on several archs it is a kernel config parameter,
user space can only know it at execution time from the aux vector.
PAGE_SIZE and PAGESIZE are not defined on archs where page size is
a runtime parameter, applications should use sysconf(_SC_PAGE_SIZE)
to query it. Internally libc code defines PAGE_SIZE to libc.page_size,
which is set to aux[AT_PAGESZ] in __init_libc and early in __dynlink
as well. (Note that libc.page_size can be accessed without GOT, ie.
before relocations are done)
Some fpathconf settings are hardcoded to 4096, these should be actually
queried from the filesystem using statfs.
| Szabolcs Nagy | 19 | -17/+29 |
| 2013-09-14 | fix overflow in sysconf for _SC_MQ_PRIO_MAX•••the value of MQ_PRIO_MAX does not fit, so it needs to use OFLOW.
| Rich Felker | 1 | -1/+2 |
| 2013-09-14 | fix child stack alignment on mips clone•••unlike other archs, the mips version of clone was not doing anything
to align the stack pointer. this seems to have been the cause for some
SIGBUS crashes that were observed in posix_spawn.
| Rich Felker | 1 | -0/+1 |
| 2013-09-14 | fix mips sysv ipc bits headers•••msg.h was wrong for big-endian (wrong endiannness padding).
shm.h was just plain wrong (mips is not supposed to have padding).
both changes were tested using libc-test on qemu-system-mips.
| Rich Felker | 2 | -3/+9 |
| 2013-09-13 | fix x86_64 lrintl asm, again•••the underlying problem was not incorrect sign extension (fixed in the
previous commit to this file by nsz) but that code that treats "long"
as 32-bit was copied blindly from i386 to x86_64.
now lrintl is identical to llrintl on x86_64, as it should be.
| Rich Felker | 1 | -2/+2 |
| 2013-09-09 | do not use default when dynamic linker fails to open existing path file•••if fopen fails for a reason other than ENOENT, we must assume the
intent is that the path file be used. failure may be due to
misconfiguration or intentional resource-exhaustion attack (against
suid programs), in which case falling back to loading libraries from
an unintended path could be dangerous.
| Rich Felker | 1 | -0/+2 |
| 2013-09-06 | math: remove STRICT_ASSIGN from exp2f (see previous commit) | Szabolcs Nagy | 1 | -1/+1 |
| 2013-09-06 | math: remove STRICT_ASSIGN macro•••gcc did not always drop excess precision according to c99 at assignments
before version 4.5 even if -std=c99 was requested which caused badly
broken mathematical functions on i386 when FLT_EVAL_METHOD!=0
but STRICT_ASSIGN was not used consistently and it is worked around for
old compilers with -ffloat-store so it is no longer needed
the new convention is to get the compiler respect c99 semantics and when
excess precision is not harmful use float_t or double_t or to specialize
code using FLT_EVAL_METHOD
| Szabolcs Nagy | 11 | -23/+13 |
| 2013-09-05 | math: support invalid ld80 representations in fpclassify•••apparently gnulib requires invalid long double representations
to be handled correctly in printf so we classify them according
to how the fpu treats them: bad inf is nan, bad nan is nan,
bad normal is nan and bad subnormal/zero is minimal normal
| Szabolcs Nagy | 1 | -2/+4 |
| 2013-09-05 | math: fix atanh (overflow and underflow issues)•••in atanh exception handling was left to the called log functions,
but the argument to those functions could underflow or overflow.
use double_t and float_t to avoid some useless stores on x86
| Szabolcs Nagy | 3 | -14/+37 |
| 2013-09-05 | math: remove libc.h include from libm.h•••libc.h is only for weak_alias so include it directly where it is used
| Szabolcs Nagy | 5 | -3/+5 |
| 2013-09-05 | math: fix acoshf on negative values•••acosh(x) is invalid for x<1, acoshf tried to be clever using
signed comparisions to handle all x<2 the same way, but the
formula was wrong on large negative values.
| Szabolcs Nagy | 2 | -7/+8 |
| 2013-09-05 | math: fix expm1l on x86_64 (avoid underflow for large negative x)•••copy the fix from i386: return -1 instead of exp2l(x)-1 when x <= -65
| Szabolcs Nagy | 3 | -3/+13 |
| 2013-09-05 | math: fix lrintl.s on x86_64 (use movslq to signextend the result) | Szabolcs Nagy | 1 | -1/+1 |
| 2013-09-05 | math: fix exp2l asm on x86 (raise underflow correctly)•••there were two problems:
* omitted underflow on subnormal results: exp2l(-16383.5) was calculated
as sqrt(2)*2^-16384, the last bits of sqrt(2) are zero so the down scaling
does not underflow eventhough the result is in subnormal range
* spurious underflow for subnormal inputs: exp2l(0x1p-16400) was evaluated
as f2xm1(x)+1 and f2xm1 raised underflow (because inexact subnormal result)
the first issue is fixed by raising underflow manually if x is in
(-32768,-16382] and not integer (x-0x1p63+0x1p63 != x)
the second issue is fixed by treating x in (-0x1p64,0x1p64) specially
for these fixes the special case handling was completely rewritten
| Szabolcs Nagy | 2 | -67/+78 |
| 2013-09-05 | math: cosmetic cleanup (use explicit union instead of fshape and dshape) | Szabolcs Nagy | 11 | -166/+140 |
| 2013-09-05 | math: remove *_WORD64 macros from libm.h•••only fma used these macros and the explicit union is clearer
| Szabolcs Nagy | 2 | -29/+13 |
| 2013-09-05 | math: remove old longdbl.h | Szabolcs Nagy | 2 | -113/+0 |
| 2013-09-05 | math: long double fix (use ldshape union)•••* use new ldshape union consistently
* add ld128 support to frexpl
* simplify sqrtl comment (ld64 is not just arm)
| Szabolcs Nagy | 8 | -51/+24 |
| 2013-09-05 | math: use float_t and double_t in scalbnf and scalbn•••remove STRICT_ASSIGN (c99 semantics is assumed) and use the conventional
union to prepare the scaling factor (so libm.h is no longer needed)
| Szabolcs Nagy | 2 | -16/+20 |
