- 08 3月, 2014 1 次提交
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由 Rich Felker 提交于
neither is correct; different commands take different argument types, and some take no arguments at all. I have a much larger overhaul of fcntl prepared to address this, but it's not appropriate to commit during freeze. the immediate problem being addressed affects forward-compatibility on x32: if new commands are added and they take pointers, but the libc-level fcntl function is not aware of them, using long would sign-extend the pointer to 64 bits and give the kernel an invalid pointer. on the kernel side, the argument to fcntl is always treated as unsigned long, so no harm is done by treating possibly-signed integer arguments as unsigned. for every command that takes an integer argument except for F_SETOWN, large integer arguments and negative arguments are handled identically anyway. in the case of F_SETOWN, the kernel is responsible for converting the argument which it received as unsigned long to int, so the sign of negative arguments is recovered. the other problem that will be addressed later is that the type passed to va_arg does not match the type in the caller of fcntl. an advanced compiler doing cross-translation-unit analysis could potentially see this mismatch and issue warnings or otherwise make trouble. on i386, this patch was confirmed not to alter the code generated by gcc 4.7.3. in principle the generated code should not be affected on any arch except x32.
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- 07 3月, 2014 1 次提交
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由 Rich Felker 提交于
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- 06 3月, 2014 2 次提交
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由 rofl0r 提交于
the kernel uses long longs in the struct, but the documentation says they're long. so we need to fixup the mismatch between the userspace and kernelspace structs. since the struct offers a mem_unit member, we can avoid truncation by adjusting that value.
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由 Rich Felker 提交于
if we ever encounter other targets where error codes don't fit in the 8-bit range, the table should probably just be bumped to 16-bit, but for now I don't want to increase the table size on all archs just because of a bug in the mips abi.
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- 01 3月, 2014 1 次提交
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由 Rich Felker 提交于
most notably, it was failing to match sh4-*, etc., but in general the explicit matching of hyphens for some archs was problematic because it failed to accept simply the musl-style arch name (without a gcc-style tuple) as an input. the original motivation of matching hyphens was to prevent incorrectly identifying a 64-bit arch as the corresponding 32-bit arch (e.g. mips* matching mips64) but this is easily fixed by simply checking (and for now, rejecting as unsupported) the relevant 64-bit archs.
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- 28 2月, 2014 5 次提交
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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由 Rich Felker 提交于
default endianness for sh on linux is little, and while conventions vary, "eb" seems to be the most widely used suffix for big endian.
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由 Rich Felker 提交于
linux, gcc, etc. all use "sh" as the name for the superh arch. there was already some inconsistency internally in musl: the dynamic linker was searching for "ld-musl-sh.path" as its path file despite its own name being "ld-musl-superh.so.1". there was some sentiment in both directions as to how to resolve the inconsistency, but overall "sh" was favored.
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- 26 2月, 2014 1 次提交
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由 Rich Felker 提交于
per POSIX, ENOENT is reserved for invalid stream position; it is an optional error and would only happen if the application performs invalid seeks on the underlying file descriptor. however, linux's getdents syscall also returns ENOENT if the directory was removed between the time it was opened and the time of the read. we need to catch this case and remap it to simple end-of-file condition (null pointer return value like an error, but no change to errno). this issue reportedly affects GNU make in certain corner cases. rather than backing up and restoring errno, I've just changed the syscall to be made in a way that doesn't affect errno (via an inline syscall rather than a call to the __getdents function). the latter still exists for the purpose of providing the public getdents alias which sets errno.
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- 25 2月, 2014 8 次提交
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由 Szabolcs Nagy 提交于
introduced in linux v3.13, 482fc6094afad572a4ea1fd722e7b11ca72022a0 to mitigate dns cache poisoning via fragmentation
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由 Szabolcs Nagy 提交于
for High-availability Seamless Redundancy (HSR) specified in IEC 62439-3 new in linux v3.13, f421436a591d34fa5279b54a96ac07d70250cc8d
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由 Szabolcs Nagy 提交于
introduced in linux v3.13, 62748f32d501f5d3712a7c372bbb92abc7c62bc7
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由 Szabolcs Nagy 提交于
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由 Szabolcs Nagy 提交于
see glibc commit 9c21573c02446b3d5cf6a34b67c8545e5be6a600
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由 Rich Felker 提交于
the build system has no automatic way to know this code applies to both big (default) and little endian variants, so explicit .sub files are needed.
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由 Szabolcs Nagy 提交于
Userspace emulated floating-point (gcc -msoft-float) is not compatible with the default mips abi (assumes an FPU or in kernel emulation of it). Soft vs hard float abi should not be mixed, __mips_soft_float is checked in musl's configure script and there is no runtime check. The -sf subarch does not save/restore floating-point registers in setjmp/longjmp and only provides dummy fenv implementation.
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由 rofl0r 提交于
the reordering of headers caused some risc archs to not see the __syscall declaration anymore. this caused build errors on mips with any compiler, and on arm and microblaze with clang. we now declare it locally just like the powerpc port does.
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- 24 2月, 2014 3 次提交
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由 Rich Felker 提交于
previously it was wrongly using the x86_64 one, precluding having both x32 and x86_64 libs present on the same system.
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由 Bobby Bingham 提交于
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由 rofl0r 提交于
it's legal to call the __syscall functions with more arguments than necessary, and the __syscall_cp cancel dummy impl. does just that. thus we must insert the switch for all possible syscalls numbers into all of the syscallN inline functions.
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- 23 2月, 2014 7 次提交
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由 rofl0r 提交于
- the nanosleep fixup "fixed" the second timespec* argument erroneusly. - the futex fixup was missing the check for FUTEX_WAIT. - general cleanup using a macro.
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由 Rich Felker 提交于
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由 rofl0r 提交于
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由 rofl0r 提交于
x32 is the internal arch name, but glibc uses x86_64-x32. there doesn't exist a specific triple for x32 in gcc and binutils. you're supposed to build your compiler for x86_64 and configure it with multilib support for "mx32". however it turns out that using a triple of x86_64-x32 makes gcc and binutils pick up the right arch (they detect it as x86_64) and allows us to have a unique triple for cross-compiler toolchains.
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由 rofl0r 提交于
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由 rofl0r 提交于
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由 rofl0r 提交于
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- 22 2月, 2014 5 次提交
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由 rofl0r 提交于
most of the members should be time_t anyway, and time_t has the correct semantics for "syscall_long", so it works on all archs, even x32.
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由 rofl0r 提交于
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由 rofl0r 提交于
some 32-on-64 archs require that the actual syscall args be long long. in that case syscall_arch.h can define syscall_arg_t to whatever it needs and syscall.h picks it up. all other archs just use long as usual.
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由 rofl0r 提交于
this allows syscall_arch.h to define the macro __scc if special casting is needed, as is the case for x32, where the actual syscall arguments are 64bit, but, in case of pointers, would get sign-extended and thus become invalid.
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由 Rich Felker 提交于
the other atomic FD_CLOEXEC interfaces (dup3, pipe2, socket) already had such emulation in place. the justification for doing the emulation here is the same as for the other functions: it allows applications to simply use accept4 rather than having to have their own fallback code for ENOSYS/EINVAL (which one you get is arch-specific!) and there is no reasonable way an application could benefit from knowing the operation is emulated/non-atomic since there is no workaround at the application level for non-atomicity (that is the whole reason these interfaces were added).
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- 19 2月, 2014 1 次提交
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由 Rich Felker 提交于
this was a missing part of the LFS64 API; it's "needed" for use with fcntl and the corresponding lock commands.
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- 14 2月, 2014 2 次提交
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由 Rich Felker 提交于
based on patch by orc.
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由 Rich Felker 提交于
this was unlikely to lead to any crash or dangerous behavior, but caused adjacent string constants to be treated as part of the protocols table, possibly returning nonsensical results for unknown protocol names/numbers or when getprotoent was called in a loop to enumerate all protocols.
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- 12 2月, 2014 2 次提交
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由 Rich Felker 提交于
this is a requirement in the specification that was overlooked.
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由 Szabolcs Nagy 提交于
another commit to silence gcc warnings (-Wparentheses) for standard headers. changed macros: LOG_UPTO, IN6_ARE_ADDR_EQUAL
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- 11 2月, 2014 1 次提交
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由 Szabolcs Nagy 提交于
gcc -Wsign-compare warns about expanded macros that were defined in standard headers (before gcc 4.8) which can make builds fail that use -Werror. changed macros: WIFSIGNALED, __CPU_op_S
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