summaryrefslogtreecommitdiff
path: root/arch
AgeCommit message (Collapse)AuthorFilesLines
2013-08-18remove the __mxcsr member from fenv_t on i386 to follow the glibc abiSzabolcs Nagy1-1/+0
in the previous commit sse fenv support was added, but there is no need to save mxcsr (sse fenv register) so fix the abi incompatibility with glibc.
2013-08-16fix detection of arm hardfloatRich Felker1-1/+1
it turns out that __SOFTFP__ does not indicate the ABI in use but rather that fpu instructions are not to be used at all. this is specified in ARM's documentation so I'm unclear on how I previously got the wrong idea. unfortunately, this resulted in the 0.9.12 release producing a dynamic linker with the wrong name. fortunately, there do not yet seem to be any public toolchain builds using the wrong name. the __ARM_PCS_VFP macro does not seem to be official from ARM, and in fact it was missing from the very earliest gcc versions (around 4.5.x) that added -mfloat-abi=hard. it would be possible on such versions to perform some ugly linker-based tests instead in hopes that the linker will reject ABI-mismatching object files, if there is demand for supporting such versions. I would probably prefer to document which versions are broken and warn users to manually add -D__ARM_PCS_VFP if using such a version. there's definitely an argument to be made that the fenv macros should be exposed even in -mfloat-abi=softfp mode. for now, I have chosen not to expose them in this case, since the math library will not necessarily have the capability to raise exceptions (it depends on the CFLAGS used to compile it), and since exceptions are officially excluded from the ARM EABI, which the plain "arm" arch aims to follow.
2013-08-16support floating point environment (fenv) on armhf (hard float) subarchsRich Felker1-0/+13
patch by nsz. I've tested it on an armhf machine and it seems to be working correctly.
2013-08-15add function types to arm crt assemblyRich Felker1-0/+1
without these, calls may be resolved incorrectly if the calling code has been compiled to thumb instead of arm. it's not clear to me at this point whether crt_arch.h is even working if crt1.c is built as thumb; this needs testing. but the _init and _fini issues were known to cause crashes in static-linked apps when libc was built as thumb, and this commit should fix that issue.
2013-08-11add missing a_or_l to atomic.h for non-x86 archsRich Felker4-0/+20
this is needed for recently committed sigaction code
2013-08-10fix _NSIG and SIGRTMAX on mipsRich Felker1-1/+1
a mips signal mask contains 128 bits, enough for signals 1 through 128. however, the exit status obtained from the wait-family functions only has room for values up to 127. reportedly signal 128 was causing kernelspace bugs, so it was removed from the kernel recently; even without that issue, however, it was impossible to support it correctly in userspace. at the same time, the bug was masked on musl by SIGRTMAX incorrectly yielding 64 on mips, rather than the "correct" value of 128. now that the _NSIG issue is fixed, SIGRTMAX can be fixed at the same time, exposing the full range of signals for application use. note that the (nonstandardized) libc _NSIG value is actually one greater than the max signal number, and also one greater than the kernel headers' idea of _NSIG. this is the reason for the discrepency with the recent kernel changes. since reducing _NSIG by one brought it down from 129 to 128, rather than from 128 to 127, _NSIG/8, used widely in the musl sources, is unchanged.
2013-07-26fix powerpc build breakage from dynamic linker path search changesRich Felker1-1/+1
2013-07-26new mostly-C crt1 implementationRich Felker6-0/+75
the only immediate effect of this commit is enabling PIE support on some archs that did not previously have any Scrt1.s, since the existing asm files for crt1 override this C code. so some of the crt_arch.h files committed are only there for the sake of documenting what their archs "would do" if they used the new C-based crt1. the expectation is that new archs should use this new system rather than using heavy asm for crt1. aside from being easier and less error-prone, it also ensures that PIE support is available immediately (since Scrt1.o is generated from the same C source, using -fPIC) rather than having to be added as an afterthought in the porting process.
2013-07-24change jmp_buf to share an underlying type and struct tag with sigjmp_bufRich Felker6-6/+6
this is necessary to meet the C++ ABI target. alternatives were considered to avoid the size increase for non-sig jmp_buf objects, but they seemed to have worse properties. moreover, the relative size increase is only extreme on x86[_64]; one way of interpreting this is that, if the size increase from this patch makes jmp_buf use too much memory, then the program was already using too much memory when built for non-x86 archs.
2013-07-22remove SIG_ATOMIC_MIN/MAX from stdint bits headersRich Felker5-10/+0
i386 was done with the big commit but I missed the others
2013-07-22fix regression in size of nlink_t (broken stat struct) on x86_64Rich Felker6-0/+6
rather than moving nlink_t back to the arch-specific file, I've added a macro _Reg defined to the canonical type for register-size values on the arch. this is not the same as _Addr for (not-yet-supported) 32-on-64 pseudo-archs like x32 and mips n32, so a new macro was needed.
2013-07-22disable legacy init/fini processing on ARMRich Felker1-0/+2
since the old, poorly-thought-out musl approach to init/fini arrays on ARM (when it was the only arch that needed them) was to put the code in crti/crtn and have the legacy _init/_fini code run the arrays, adding proper init/fini array support caused the arrays to get processed twice on ARM. I'm not sure skipping legacy init/fini processing is the best solution to the problem, but it works, and it shouldn't break anything since the legacy init/fini system was never used for ARM EABI.
2013-07-22change wint_t to unsignedRich Felker6-6/+6
aside from the obvious C++ ABI purpose for this change, it also brings musl into alignment with the compiler's idea of the definition of wint_t (use in -Wformat), and makes the situation less awkward on ARM, where wchar_t is unsigned. internal code using wint_t and WEOF was checked against this change, and while a few cases of storing WEOF into wchar_t were found, they all seem to operate properly with the natural conversion from unsigned to signed.
2013-07-22refactor headers, especially alltypes.h, and improve C++ ABI compatRich Felker18-814/+181
the arch-specific bits/alltypes.h.sh has been replaced with a generic alltypes.h.in and minimal arch-specific bits/alltypes.h.in. this commit is intended to have no functional changes except: - exposing additional symbols that POSIX allows but does not require - changing the C++ name mangling for some types - fixing the signedness of blksize_t on powerpc (POSIX requires signed) - fixing the limit macros for sig_atomic_t on x86_64 - making dev_t an unsigned type (ABI matching goal, and more logical) in addition, some types that were wrongly defined with long on 32-bit archs were changed to int, and vice versa; this change is non-functional except for the possibility of making pointer types mismatch, and only affects programs that were using them incorrectly, and only at build-time, not runtime. the following changes were made in the interest of moving non-arch-specific types out of the alltypes system and into the headers they're associated with, and also will tend to improve application compatibility: - netdb.h now includes netinet/in.h (for socklen_t and uint32_t) - netinet/in.h now includes sys/socket.h and inttypes.h - sys/resource.h now includes sys/time.h (for struct timeval) - sys/wait.h now includes signal.h (for siginfo_t) - langinfo.h now includes nl_types.h (for nl_item) for the types in stdint.h: - types which are of no interest to other headers were moved out of the alltypes system. - fast types for 8- and 64-bit are hard-coded (at least for now); only the 16- and 32-bit ones have reason to vary by arch. and the following types have been changed for C++ ABI purposes; - mbstate_t now has a struct tag, __mbstate_t - FILE's struct tag has been changed to _IO_FILE - DIR's struct tag has been changed to __dirstream - locale_t's struct tag has been changed to __locale_struct - pthread_t is defined as unsigned long in C++ mode only - fpos_t now has a struct tag, _G_fpos64_t - fsid_t's struct tag has been changed to __fsid_t - idtype_t has been made an enum type (also required by POSIX) - nl_catd has been changed from long to void * - siginfo_t's struct tag has been removed - sigset_t's has been given a struct tag, __sigset_t - stack_t has been given a struct tag, sigaltstack - suseconds_t has been changed to long on 32-bit archs - [u]intptr_t have been changed from long to int rank on 32-bit archs - dev_t has been made unsigned summary of tests that have been performed against these changes: - nsz's libc-test (diff -u before and after) - C++ ABI check symbol dump (diff -u before, after, glibc) - grepped for __NEED, made sure types needed are still in alltypes - built gcc 3.4.6
2013-07-19change uid_t, gid_t, and id_t to unsigned typesRich Felker6-18/+18
this change is both to fix one of the remaining type (and thus C++ ABI) mismatches with glibc/LSB and to allow use of the full range of uid and gid values, if so desired. passwd/group access functions were not prepared to deal with unsigned values, so they too have been fixed with this commit.
2013-07-18make the dynamic linker find its path file relative to its own locationRich Felker6-6/+33
prior to this change, using a non-default syslibdir was impractical on systems where the ordinary library paths contain musl-incompatible library files. the file containing search paths was always taken from /etc, which would either correspond to a system-wide musl installation, or fail to exist at all, resulting in searching of the default library path. the new search strategy is safe even for suid programs because the pathname used comes from the PT_INTERP header of the program being run, rather than any external input. as part of this change, I have also begun differentiating the names of arch variants that differ by endianness or floating point calling convention. the corresponding changes in the build system and and gcc wrapper script (to use an alternate dynamic linker name) for these configurations have not yet been made.
2013-07-17make spacing in x86_64 alltypes.h.sh more uniform with other archsRich Felker1-0/+1
patch by Luka Perkov, who noted that all other archs have a newline.
2013-07-10add some ARM EABI-specific exception handling infrastructureRich Felker1-0/+42
patch by Timo Teräs
2013-06-29add some comments about the mips ksigaction structure weirdnessRich Felker1-0/+3
2013-06-25respect iso c namespace in stdio.h and wchar.h regarding va_listRich Felker6-0/+7
despite declaring functions that take arguments of type va_list, these headers are not permitted by the c standard to expose the definition of va_list, so an alias for the type must be used. the name __isoc_va_list was chosen to convey that the purpose of this alternate name is for iso c conformance, and to avoid the multitude of names which gcc mangles with its hideous "fixincludes" monstrosity, leading to serious header breakage if these "fixes" are run.
2013-05-26Merge remote-tracking branch 'nsz/review'Rich Felker7-42/+23
2013-05-26fix ioctl _IOR, _IOW, etc macros to avoid signed overflow (2<<30)Szabolcs Nagy6-38/+19
2013-05-26on x86_64 use long instead of long long for 64bit posix typesSzabolcs Nagy1-4/+4
following glibc use the lowest rank 64bit integer type for ino_t etc. this is eg. useful for printf format compatibility
2013-05-23change underlying type of clock_t to be uniform and match ABIRich Felker5-5/+5
previously we were using an unsigned type on 32-bit systems so that subtraction would be well-defined when it wrapped, but since wrapping is non-conforming anyway (when clock() overflows, it has to return -1) the only use of unsigned would be to buy a little bit more time before overflow. this does not seem worth having the type vary per-arch (which leads to more arch-specific bugs) or disagree with the ABI musl (mostly) follows.
2013-05-17add FLT_TRUE_MIN, etc. macros from C11Rich Felker6-0/+6
there was some question as to how many decimal places to use, since one decimal place is always sufficient to identify the smallest denormal uniquely. for now, I'm following the example in the C standard which is consistent with the other min/max macros we already had in place.
2013-04-04fix type issues in stdint.h so underlying types of 64-bit types match ABIRich Felker6-0/+18
2013-04-04eliminate bits/wchar.hRich Felker6-24/+0
the preprocessor can reliably determine the signedness of wchar_t. L'\0' is used for 0 in the expressions so that, if the underlying type of wchar_t is long rather than int, the promoted type of the expression will match the type of wchar_t.
2013-04-02re-add useconds_trofl0r6-0/+6
this type was removed back in 5243e5f1606a9c6fcf01414e , because it was removed from the XSI specs. however some apps use it. since it's in the POSIX reserved namespace, we can expose it unconditionally.
2013-04-01add syscall numbers for the new kcmp and finit_module syscallsSzabolcs Nagy6-9/+46
and remove syscall todos from microblaze
2013-04-01add the new SO_REUSEPORT socket option to mips and powerpcSzabolcs Nagy2-1/+2
SO_REUSEPORT implementation was merged in the linux kernel commit c617f398edd4db2b8567a28e899a88f8f574798d 2013-01-23
2013-03-26remove __SYSCALL_SSLEN arch macro in favor of using public _NSIGRich Felker6-12/+0
the issue at hand is that many syscalls require as an argument the kernel-ABI size of sigset_t, intended to allow the kernel to switch to a larger sigset_t in the future. previously, each arch was defining this size in syscall_arch.h, which was redundant with the definition of _NSIG in bits/signal.h. as it's used in some not-quite-portable application code as well, _NSIG is much more likely to be recognized and understood immediately by someone reading the code, and it's also shorter and less cluttered. note that _NSIG is actually 65/129, not 64/128, but the division takes care of throwing away the off-by-one part.
2013-03-23add deprecated SIGIOT alias for SIGABRTRich Felker5-1/+5
reportedly some programs (e.g. showkeys in the kbd package) use it.
2013-03-04fix types for wctype_t and wctrans_tRich Felker6-12/+12
wctype_t was incorrectly "int" rather than "long" on x86_64. not only is this an ABI incompatibility; it's also a major design flaw if we ever wanted wctype_t to be implemented as a pointer, which would be necessary if locales support custom character classes, since int is too small to store a converted pointer. this commit fixes wctype_t to be unsigned long on all archs, matching the LSB ABI; this change does not matter for C code, but for C++ it affects mangling. the same issue applied to wctrans_t. glibc/LSB defines this type as const __int32_t *, but since no such definition is visible, I've just expanded the definition, int, everywhere. it would be nice if these types (which don't vary by arch) could be in wctype.h, but the OB XSI requirement in POSIX that wchar.h expose some types and functions from wctype.h precludes doing so. glibc works around this with some hideous hacks, but trying to duplicate that would go against the intent of musl's headers.
2013-02-26fix wrong float_t on x86_64Rich Felker1-1/+1
x86_64 does not have excess precision, at all
2013-02-06arm: add __aeabi_atexit()rofl0r1-0/+6
arm eabi requires this symbol for static C++ dtors. usually it is provided by libstdc++, but when a C++ program doesn't use the std lib (free-standing), the libc has to provide it. this was encountered while building transmission, which depends on such a C++ library (libutp). this function is nearly identical to __cxa_atexit, but it has the order of argumens swapped for "performance reasons". see page 25 of http://infocenter.arm.com/help/topic/com.arm.doc.ihi0043d/IHI0043D_rtabi.pdf there are other aeabi specific C++ support functions missing, but it is not clear yet that GCC makes use of them so we omit them for the moment.
2013-01-12add missing mmap options and madvices to bits/mman.h based on linux headersSzabolcs Nagy6-0/+41
2013-01-12add missing EXTPROC flag to bits/termios.hSzabolcs Nagy4-0/+4
mips and powerpc already had this termios flag defined
2013-01-12add missing F_GETOWNER_UIDS flag to bits/fcntl.hSzabolcs Nagy6-0/+11
2013-01-12add missing EHWPOISON to bits/errno.hSzabolcs Nagy5-0/+5
it was already defined for mips, but was missing from other archs
2012-12-19x86_64/bits/signal.h: fix typo in REG_CSGSFSrofl0r1-1/+1
2012-12-07fix trailing whitespace issues that crept in here and thereRich Felker1-9/+9
2012-12-06move signal.h REG_* macros under _GNU_SOURCE protectionRich Felker2-44/+48
they were accidentally exposed under just baseline POSIX, which is a big namespace pollution issue. thankfully glibc only exposes them under _GNU_SOURCE, not under any of its other options, so omitting the pollution in the default _BSD_SOURCE profile does not hurt application compatibility at all.
2012-12-06bits/signal.h: add register names for x86(_64)rofl0r2-0/+46
glibc exposes them from ucontext.h. since that header includes signal.h, it is safe to put them into bits/signal.h, if _GNU_SOURCE is defined.
2012-12-06add more arch-specific MAP_ macros to bits/mman.hrofl0r6-0/+24
these are also needed by qemu.
2012-12-06remove MAP_32 from non-x86 archsrofl0r3-3/+0
both kernel and glibc define it only on x86(_64).
2012-12-06add MAP_NORESERVE to bits/mman.hrofl0r6-0/+6
this is needed for qemu, and since it differs for each arch it can't be circumvented easily by using a macro in CFLAGS.
2012-12-04fix regression in arm user.h that happened during big user.h changesRich Felker1-0/+1
2012-11-26remove stat member aliases from ppc-specific bits/stat.hRich Felker1-6/+0
if these are to be supported, they belong in the main stat.h, not repeated for each arch.
2012-11-25fixup mcontext stuff to expost gregset_t/fpregset_t as appropriateRich Felker6-10/+32
2012-11-25make sys/procfs.h mostly work on most archsRich Felker5-8/+30
these structures are purely for use by trace/debug tools and tools working with core files. the definition of fpregset_t, which was previously here, has been removed because it was wrong; fpregset_t should be the type used in mcontext_t, not the type used in ptrace/core stuff.
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 21:43:45 +0000