- 03 1月, 2017 2 次提交
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由 Rich Felker 提交于
commit 0dc99ac4 added input length checking to avoid unsafe VLA allocation, but put it in the wrong place, before the glob_t structure was zeroed out. while POSIX isn't clear on whether it's permitted to call globfree after glob failed with GLOB_NOSPACE, making it safe is clearly better than letting uninitialized pointers get passed to free in non-conforming callers. while we're fixing this, change strlen check to the idiomatic strnlen version to avoid unbounded input scanning before returning an error.
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由 Rich Felker 提交于
commit 583ea835 fixed the case where tm_year is negative but the resulting year (offset by 1900) was still positive, which is always the case for time_t values that fit in 32 bits, but not for arbitrary inputs. based on an earlier patch by Julien Ramseier which was overlooked at the time the previous fix was applied.
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- 01 1月, 2017 1 次提交
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由 Rich Felker 提交于
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- 30 12月, 2016 3 次提交
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由 Szabolcs Nagy 提交于
export tcp data delivery rate in tcp_info struct. see linux commit eb8329e0a04db0061f714f033b4454326ba147f4
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由 Szabolcs Nagy 提交于
for handling file locking on overlayfs. see linux commit c568d68341be7030f5647def68851e469b21ca11
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由 Szabolcs Nagy 提交于
see linux commit e8c24d3a23a469f1f40d4de24d872ca7023ced0a and linux Documentation/x86/protection-keys.txt
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- 21 12月, 2016 1 次提交
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由 Rich Felker 提交于
the static-linked version of __init_tls needs to locate the TLS initialization image via the ELF program headers, which requires determining the base address at which the program was loaded. the existing code attempted to do this by comparing the actual address of the program headers (obtained via auxv) with the virtual address for the PT_PHDR record in the program headers. however, the linker seems to produce a PT_PHDR record only when a program interpreter (dynamic linker) is used. thus the computation failed and used the default base address of 0, leading to a crash when trying to access the TLS image at the wrong address. the dynamic linker entry point and static-PIE rcrt1.o startup code compute the base address instead by taking the difference between the run-time address of _DYNAMIC and the virtual address in the PT_DYNAMIC record. this patch copies the approach they use, but with a weak symbolic reference to _DYNAMIC instead of obtaining the address from the crt_arch.h asm. this works because relocations have already been performed at the time __init_tls is called.
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- 20 12月, 2016 2 次提交
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由 Rich Felker 提交于
all assembly is now thumb2-compatible. on existing targets this is at best a size optimization, but it will also facilitate porting to thumb2-isa-only arm variants.
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由 Rich Felker 提交于
three problems are addressed: - use of pc arithmetic, which was difficult if not impossible to make correct in thumb mode on all models, so that relative rather than absolute pointers to the backends could be used. this was designed back when there was no coherent model for the early stages of the dynamic linker before relocations, and is no longer necessary. - assumption that data (the relative pointers to the backends) can be accessed at a constant displacement from the code. this will not be possible on future fdpic subarchs (for cortex-m), so move responsibility for loading the backend code address to the caller. - hard-coded arm opcodes using the .word directive. instead, use the .arch directive to work around the assembler's refusal to assemble instructions not available (or in some cases, available but just considered deprecated) in the target isa level. the obscure v6t2 arch is used for v6 code so as to (1) allow generation of thumb2 output if -mthumb is active, and (2) avoid warnings/errors for mcr barriers that clang would produce if we just set arch to v7-a. in addition, the __aeabi_read_tp function is moved out of the inner workings and implemented as an asm wrapper around a C function, so that asm code does not need to read global data. the asm wrapper serves to satisfy the ABI calling convention requirements for this function.
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- 18 12月, 2016 3 次提交
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由 Rich Felker 提交于
the thumb incompatibilities in the asm are probably only minor and should be fixable, but for now just use the C version.
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由 Rich Felker 提交于
sp cannot be used in the ldm/stm register set in thumb mode.
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由 Szabolcs Nagy 提交于
float conversion is slow and big on soft-float targets. The lookup table increases code size a bit on most hard float targets (and adds 60byte rodata), performance can be a bit slower because of position independent data access and cpu internal state dependence (cache, extra branches), but the overall effect should be minimal (common, small size allocations should be unaffected).
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- 17 12月, 2016 6 次提交
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由 Szabolcs Nagy 提交于
In BRE, ^ is an anchor at the beginning of an expression, optionally it may be an anchor at the beginning of a subexpression and must be treated as a literal otherwise. Previously musl treated ^ in subexpressions as literal, but at least glibc and gnu sed treats it as an anchor and that's the more useful behaviour: it can always be escaped to get back the literal meaning. Same for $ at the end of a subexpression. Portable BRE should not rely on this, but there are sed commands in build scripts which do. This changes the meaning of the BREs: \(^a\) \(a\|^b\) \(a$\) \(a$\|b\)
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由 Rich Felker 提交于
POSIX specifies the result to have signed 32-bit range. on 32-bit archs, the implicit conversion to long achieved the desired range already, but when long is 64-bit, a cast is needed. patch by Ed Schouten.
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由 Quentin Rameau 提交于
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由 Bobby Bingham 提交于
the bz instruction that was wrongly used only admits a small immediate displacement and cannot be used with external symbols; apparently the linker fails to diagnose the overflow.
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由 Bobby Bingham 提交于
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由 Bobby Bingham 提交于
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- 16 12月, 2016 1 次提交
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由 Rich Felker 提交于
this has been slated for removal for a long time. there is fundamentally no way to implement stdarg without compiler assistance; any attempt to do so has serious undefined behavior; its working depends not just (as a common misconception goes) on ABI, but also on assumptions about compiler code generation internal to a translation unit, which is not subject to external ABI constraints.
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- 07 12月, 2016 1 次提交
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由 Rich Felker 提交于
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- 13 11月, 2016 1 次提交
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由 Rich Felker 提交于
gdb can only backtrace/unwind across signal handlers if it recognizes the sa_restorer trampoline. for x86_64, gdb first attempts to determine the symbol name for the function in which the program counter resides and match it against "__restore_rt". if no name can be found (e.g. in the case of a stripped binary), the exact instruction sequence is matched instead. when matching the function name, however, gdb's unwind code wrongly considers the interval [sym,sym+size] rather than [sym,sym+size). thus, if __restore_rt begins immediately after another function, gdb wrongly identifies pc as lying within the previous adjacent function. this patch adds a nop before __restore_rt to preclude that possibility. it also removes the symbol name __restore and replaces it with a macro since the stability of whether gdb identifies the function as __restore_rt or __restore is not clear. for the no-symbols case, the instruction sequence is changed to use %rax rather than %eax to match what gdb expects. based on patch by Szabolcs Nagy, with extended description and corresponding x32 changes added.
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- 12 11月, 2016 3 次提交
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由 Bobby Bingham 提交于
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由 Bobby Bingham 提交于
On s390x, the kernel provides AT_SYSINFO_EHDR, but sets it to zero, if the program being run does not have a program interpreter. This causes problems when running the dynamic linker directly.
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由 Rich Felker 提交于
alpha and s390x gratuitously use 64-bit entries (wasting 2x space and cache utilization) despite the values always being 32-bit. based on patch by Bobby Bingham, with changes suggested by Alexander Monakov to use the public Elf_Symndx type from link.h (and make it properly variable by arch) rather than adding new internal infrastructure for handling the type.
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- 09 11月, 2016 3 次提交
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由 Rich Felker 提交于
commit 31fb174d used DEFAULT_GUARD_SIZE from pthread_impl.h in a static initializer, breaking build on archs where its definition, PAGE_SIZE, is not a constant. instead, just define DEFAULT_GUARD_SIZE as 4096, the minimal page size on any arch we support. pthread_create rounds up to whole pages anyway, so defining it to 1 would also work, but a moderately meaningful value is nicer to programs that use pthread_attr_getguardsize on default-initialized attribute objects.
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由 Rich Felker 提交于
based on patch by Timo Teräs: While generally this is a bad API, it is the only existing API to affect c++ (std::thread) and c11 (thrd_create) thread stack size. This patch allows applications only to increate stack and guard page sizes.
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由 Rich Felker 提交于
commit 33ce9208 broke pthread_create in the case where a null attribute pointer is passed; rather than using the default sizes, sizes of 0 (plus the remainder of one page after TLS/TCB use) were used.
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- 08 11月, 2016 9 次提交
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由 Rich Felker 提交于
the linux kernel uapi headers provide their own definitions of the structures from netinet/in.h, resulting in errors when a program includes both the standard libc header and one or more of the networking-related kernel headers that pull in the kernel definitions. as before, we do not attempt to support the case where kernel headers are included before the libc ones, since the kernel definitions may have subtly incorrect types, namespace violations, etc. however, we can easily support the inclusion of the kernel headers after the libc ones, since the kernel headers provide a public interface for suppressing their definitions. this patch adds the necessary macro definitions for such suppression.
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由 Rich Felker 提交于
previously, the pthread_attr_t object was always initialized all-zero, and stack/guard size were represented as differences versus their defaults. this required lots of confusing offset arithmetic everywhere they were used. instead, have pthread_attr_init fill in the default values, and work with absolute sizes everywhere.
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由 Rich Felker 提交于
the swprintf write callback never reset its buffer pointers, so after its 256-byte buffer filled up, it would keep repeating those bytes over and over in the output until the destination buffer filled up. it also failed to set the error indicator for the stream on EILSEQ, potentially allowing output to continue after the error.
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由 Daniel Sabogal 提交于
the overflow check for years+100 did not account for the extra year computed from the remaining months. instead, perform this check after obtaining the final number of years.
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由 Szabolcs Nagy 提交于
If a DT_NEEDED entry was the prefix of a reserved library name (up to the first dot) then it was incorrectly treated as a libc reserved name. e.g. libp.so dependency was not loaded as it matched libpthread reserved name.
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由 Szabolcs Nagy 提交于
this was harmless as load_library is not called concurrently, but it used one word of bss.
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由 Rich Felker 提交于
the value 19991006 for __RES implies availability of res_ninit and related functions that take a resolver state argument; these are not supported since our resolver is stateless. instead claim support for just the older API by defining __RES to 19960801. based on patch by Dmitrij D. Czarkoff.
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由 Hannu Nyman 提交于
Fix parsing of the < > quoted time zone names. Compare the correct character instead of repeatedly comparing the first character.
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由 Rich Felker 提交于
this header is XSI-shaded itself and thus does not need to limit specific content to _XOPEN_SOURCE.
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- 22 10月, 2016 1 次提交
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由 Rich Felker 提交于
the old snprintf design setup the FILE buffer pointers to point directly into the destination buffer; if n was actually larger than the buffer size, the pointer arithmetic to compute the buffer end pointer was undefined. this affected sprintf, which is implemented in terms of snprintf, as well as some unusual but valid direct uses of snprintf. instead, setup the FILE as unbuffered and have its write function memcpy to the destination. the printf core sets up its own temporary buffer for unbuffered streams.
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- 21 10月, 2016 3 次提交
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由 Rich Felker 提交于
reported and changes suggested by Daniel Sabogal.
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由 Rich Felker 提交于
inclusion of these names was unintentional and in most cases is a namespace violation. Daniel Sabogal tracked down and reported these.
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由 Rich Felker 提交于
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