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The return type of syscall() is long so __syscall_error, which is jumped
to by syscall handlers to stash an error number into errno, must return
long too otherwhise it returs 4294967295L instead of -1L. For example,
syscall for x86_64 is defined in libc/sysdeps/linux/x86_64/syscall.S as
syscall:
movq %rdi, %rax /* Syscall number -> rax. */
movq %rsi, %rdi /* shift arg1 - arg5. */
movq %rdx, %rsi
movq %rcx, %rdx
movq %r8, %r10
movq %r9, %r8
movq 8(%rsp),%r9 /* arg6 is on the stack. */
syscall /* Do the system call. */
cmpq $-4095, %rax /* Check %rax for error. */
jae __syscall_error /* Branch forward if it failed. */
ret /* Return to caller. */
In libc/sysdeps/linux/x86_64/__syscall_error.c, __syscall_error is
defined as
int __syscall_error(void) attribute_hidden;
int __syscall_error(void)
{
register int err_no __asm__ ("%rcx");
__asm__ ("mov %rax, %rcx\n\t"
"neg %rcx");
__set_errno(err_no);
return -1;
}
So __syscall_error returns -1 as a 32-bit int in a 64-bit register, %rax
(0x00000000ffffffff, whose decimal value is decimal 4294967295) and a
test like this always returns false:
if (syscall(number, ...) == -1)
foo();
Fix the error by making __syscall_error return a long, like syscall().
The problem can be circumvented by the caller by coercing the returned
value to int before comparing it to -1:
if ((int) syscall(number, ...) == -1)
foo();
The same problem probably occurs on other 64-bit systems but so far only
x86_64 was tested, so this change must be considered experimental.
Signed-off-by: Carlos Santos <unixmania@gmail.com>
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(gdb) print offsetof(struct __jmp_buf_tag, __mask_was_saved)
$12 = (int *) 0x1f0
using https://stackoverflow.com/a/39663128/2171120
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Update from linux/arch/sparc/include/uapi/asm/uctx.h
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This symbol was causing a build failure with the new toolchain. It
looks like it has always been wrong.
The main issue was checking for PIC rather than __PIC__.
Remove all PSEUDO_* macros and ther SYSCALL_ERROR_NAME macro as they are
not needed by uclibc-ng, they are used in glibc for building up syscalls
there, but not here.
Fixes error:
/opt/shorne/software/or1k-linux/bin/../lib/gcc/or1k-linux/9.0.1/../../../../or1k-linux/bin/ld: libc/libc_so.a(or1k_clone.os): pc-relative relocation against dynamic symbol __syscall_error
/opt/shorne/software/or1k-linux/bin/../lib/gcc/or1k-linux/9.0.1/../../../../or1k-linux/bin/ld: final link failed: bad value
Signed-off-by: Stafford Horne <shorne@gmail.com>
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The internal heap structures were not protected properly in
memalign(). If multiple threads were concurrently allocating memory and
one of them were requesting aligned memory via valloc,memalign or
posix_memalign the internal heap data structures could be corrupted.
Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
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This patch fixes the incorrect guard by __USE_MISC of struct winsize and
struct termio in powerpc termios header. Current states leads to build
failures if the program defines _XOPEN_SOURCE, but not _DEFAULT_SOURCE
or either _BSD_SOURCE or _SVID_SOURCE. Without any definition,
__USE_MISC will not be defined and neither the struct definitions.
This patch copies the default Linux ioctl-types.h by adjusting only the
character control field (c_cc) size in struct termio.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[Vadim: adopted for uclibc ]
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This reverts commit 14c36638c1a125b1c2d06857c7e7c44f266d0e8e.
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Fix redefinition of 'struct termios' by syncing termios powerpc headers
from glibc, the commit which fixed the same issue in glibc:
d4795e4a43e6f0c221bc5dc64c612206a21a177b PowerPC: Fix termios definitions
https://sourceware.org/git/?p=glibc.git;a=commit;h=d4795e4a43e6f0c221bc5dc64c612206a21a177b
it fixed the following bug request:
https://bugzilla.redhat.com/show_bug.cgi?id=1122714
In case of Buildroot it fixes flashrom build for PowerPC.
Fixes:
http://autobuild.buildroot.net/results/797dde5cbf0e94162c7cc7b557841605c78ac2f3/
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
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This is a follow up to an incorrect fix for memmove() problem in:
commit 785dee78552f9ad06819bf7eb1adc05b43110842
Author: Petar Jovanovic <petar.jovanovic@rt-rk.com>
Date: Mon May 6 13:29:02 2019 +0000
mips: fix memmove() call when __ARCH_HAS_BWD_MEMCPY__ is not defined
Calling memcpy from memmove should be skipped in two cases:
a) if arch's memcpy uses a backward copying (e.g. SH4)
b) if arch's memcpy is not fully safe for overlapping regions (MIPS)
Signed-off-by: Petar Jovanovic <petar.jovanovic@rt-rk.com>
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Summary:
Recent arch do not support Legacy.
Thus they don't define ARCH_HAS_DEPRECATED_SYSCALLS
But this led to per-arch headers not being installed and common-generic ones taking precedence.
So it was impossible to declare arch-specific statfs.h for instance, to force 64-bit mode only.
This was leading to the following situation to happen:
1/ an application compiles (say without -D_FILE_OFFSET_BITS set)
it therefore uses struct statfs from libc/sysdeps/linux/common-generic/bits/statfs.h
where f_type and f_bsize fields are U32: https://elixir.bootlin.com/uclibc-ng/latest/source/libc/sysdeps/linux/common-generic/bits/statfs.h#L18
2/ application calls "statfs"
3/ uClibc issues "statfs64" syscall (because __NR_statfs64 is defined and __NR_statfs is undefined):
https://elixir.bootlin.com/uclibc-ng/latest/source/libc/sysdeps/linux/common/statfs.c#L14
4/ if Linux kernel port is not defining CONFIG_COMPAT, it calls do_statfs_native
https://elixir.bootlin.com/linux/latest/source/fs/statfs.c#L195
5/ it does copy_to_user of the size of struct statfs defined in the kernel source tree:
https://elixir.bootlin.com/linux/latest/source/fs/statfs.c#L161
6/ Generic struct statfs in the kernel is defined like this:
https://elixir.bootlin.com/linux/latest/source/include/uapi/asm-generic/statfs.h#L23
f_type and f_bsize fields are long (64 bits) for 64-bit archs.
7/ memory corruption occurs because of this mismatch
Solution:
Allow to not define __ARCH_HAS_DEPRECATED_SYSCALLS__ *and* declare its own arch-specific statfs.h header, matching the kernel one.
(for instance with f_type and f_bsize defined as long)
Does this change break other archs?
This change allows headers in libc/sysdeps/linux/<ARCH>/bits/ to override ones in libc/sysdeps/linux/common-generic/bits/
The only arch which does not define __ARCH_HAS_DEPRECATED_SYSCALLS__ *and* has a header in libc/sysdeps/linux/<ARCH>/bits/ which can conflict with one in libc/sysdeps/linux/common-generic/bits/
is c6x.
The file that can override is ../libc/sysdeps/linux/c6x/bits/kernel_stat.h
This, btw, means that, today, this file is there and is not used (during compilation, GNU Make overrides the rule):
Makefile.in:152: warning: overriding recipe for target `include/bits/kernel_stat.h'
Makefile.in:148: warning: ignoring old recipe for target `include/bits/kernel_stat.h'
I was not able to compile uClibc with the only binary toolchain I found for c6x arch (gcc-4.5.1 from code sourcery: https://sourcery.mentor.com/GNUToolchain/release1882)
However, I can tell that c6x's kernel_stat.h only defines two structs: kernel_stat and kernel_stat64: https://elixir.bootlin.com/uclibc-ng/latest/source/libc/sysdeps/linux/c6x/bits/kernel_stat.h
And I can also tell that those structs are only used when using xstat conversion functions (__xstat32_conv / xstat_conv) which are only used and present in the __ARCH_HAS_DEPRECATED_SYSCALLS__ == y case.
However, c6x does not define __ARCH_HAS_DEPRECATED_SYSCALLS__
So I think I can say that this change does not affect c6x nor other archs.
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We don't support shared libraries and thus _init/_fini. But loading
nommu binaries blows they aren't cleared, so do that.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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This avoids a nommu build failure.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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There is no opendir64(), thus even programs built for 64-bit off_t
use opendir(). Before this change, internally opendir() uses fstat(),
with the following breakage if some of struct stat fields are too narrow:
$ strace ls -l
execve("/busybox/ls", ["ls", "-l"], 0x7ffcdc43ede8 /* 16 vars */) = 0
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
getuid32() = 0
time([1551486393 /* 2019-03-02T00:26:33+0000 */]) = 1551486393 (2019-03-02T00:26:33+0000)
ioctl(0, TIOCGWINSZ, {ws_row=38, ws_col=120, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
brk(NULL) = 0x9768000
brk(0x9769000) = 0x9769000
lstat64(".", 0xffa6e374) = 0
open(".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, 0xffa6e378) = -1 EOVERFLOW (Value too large for defined data type)
See https://bugs.busybox.net/show_bug.cgi?id=11651
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
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__UCLIBC_HAS_PROGRAM_INVOCATION_NAME__
This fixes the issue reported at https://github.com/wbx-github/uclibc-ng/issues/2
Signed-off-by: Yann Sionneau <yann@sionneau.net>
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When arch (such as MIPS) does not define __ARCH_HAS_BWD_MEMCPY__, memmove()
calls memcpy() which is wrong for overlapping regions.
Signed-off-by: Petar Jovanovic <petar.jovanovic@rt-rk.com>
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uClibc-ng don't build with gcc 9.1 [1] due to a new check that
"catch illegal asm constraint usage" [2].
gcc 9.1 print this error:
"invalid hard register usage between earlyclobber operand and input operand"
The asm constraint is present in uClibc since it support sparc (back in 2002)[3].
Note: There is no such constraint is Glibc counterpart code [4].
[1] https://gitlab.com/kubu93/toolchains-builder/-/jobs/205435757
[2] https://github.com/gcc-mirror/gcc/commit/b782636f28f5c378897c238081d28d7a4a6ca578
[3] https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=3b6d086531102b6d09ce852feb1e370d5dca3ce9
[4]
+https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/sparc/sysdep.h;h=981b2a26b7a91093f821c97876
+e55bc4be2d9f8a;hb=HEAD
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preadv/pwritev don't provide separate version for 64-bit wide off_t,
and default to 32-bit wide off_t, which results in a mismatch between
declaration and definition for user programs built with
-D_FILE_OFFSET_BITS=64.
Make offset argument of both functions __off64_t.
This fixes test misc/tst-preadvwritev on xtensa.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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xtensa assembler is capable of representing register loads with either
movi + addmi, l32r or const16, depending on the core configuration.
Don't use '.literal' and 'l32r' directly in the code, use 'movi' and let
the assembler relax them.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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Add description for _LARGEFILE_SOURCE, _LARGEFILE64_SOURCE,
_FILE_OFFSET_BITS and __USE_LARGEFILE, __USE_LARGEFILE64 and
__USE_FILE_OFFSET64 macros.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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This patch seems needed in builds where
- SHARED is not defined (no shared lib support)
- and USE_TLS is set
Without this patch, static_dtv is free'ed.
See the following backtrace:
0 __do_check_chunk (p=0x52638 <fork_handler_pool+2296>) at libc/stdlib/malloc-standard/malloc.c:80
1 0x0000000000017fa0 in __do_check_inuse_chunk (p=0x52638 <fork_handler_pool+2296>) at libc/stdlib/malloc-standard/malloc.c:143
2 0x0000000000017354 in free (mem=0x52648 <static_dtv>) at libc/stdlib/malloc-standard/free.c:293
3 0x000000000002d5b0 in _dl_deallocate_tls (tcb=0x58690, dealloc_tcb=false) at libpthread/nptl/sysdeps/generic/dl-tls.c:588
4 0x0000000000021c0c in __deallocate_stack (pd=0x58000) at libpthread/nptl/allocatestack.c:717
5 0x0000000000024408 in __free_tcb (pd=0x58000) at libpthread/nptl/pthread_create.c:217
6 0x00000000000200ac in pthread_join (threadid=360448, thread_return=0x0 <k1c_start>) at libpthread/nptl/pthread_join.c:109
7 0x0000000000010354 in tf (a=0x58000) at tst-basic3.c:42
8 0x00000000000247c8 in start_thread (arg=0x4000200960) at libpthread/nptl/pthread_create.c:285
9 0x0000000000026560 in ?? ()
This backtrace is obtained while debugging tst-basic3 from the uclibc-ng nptl testsuite.
It aborts because of the assert in malloc:
https://elixir.bootlin.com/uclibc-ng/v1.0.31/source/libc/stdlib/malloc-standard/malloc.c#L80
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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For ARCH where shared lib are not supported:
- SHARED is not set (!SHARED is true)
- __ARCH_HAS_NO_LDSO__ is set
so code inside #if !defined __ARCH_HAS_NO_LDSO__ && !defined SHARED
is compiled-out.
But without a call do _dl_aux_init(), _dl_phdr stays NULL and
__libc_setup_tls won't be able to allocate memory for the in-executable TLS
and also won't be able to load the initimage from ELF TLS segment.
This results in segfault when doing things like "errno = 0" like
in tst-cancel15.c for instance in uClibc-ng testsuite.
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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--000000000000cb1b1305827e5ae0
Content-Type: text/plain; charset="UTF-8"
Hi,
Current version of uClibc-ng has issue in open_memstream() function.
If the cookie variable is NULL (due malloc() fail) then null pointer is
dereferenced after if block.
The attached patch fixes this issue.
--
Best regards,
Eugene
<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Hi,<div><br></div><div>Current version of uClibc-ng has issue in open_memstream() function.</div><div>If the cookie variable is NULL (due malloc() fail) then null pointer is dereferenced after if block.</div><div><br></div><div>The attached patch fixes this issue.<br clear="all"><div>-- <br></div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div><span><div>Best regards,<br></div>Eugene</span></div></div></div></div></div></div></div></div></div>
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Support EM_CSKY 252 elf format.
Changelog:
Increase EM_NUM to 253
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Signed-off-by: Mao Han <han_mao@c-sky.com>
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Old version manages strings the regular way (i.e. counting on zero-ended
sequences). In fact strings captured from the /etc/ethers file are
'\n'-ended. So, for example, using strchr function could lead to buffer
overflow.
Reported-by: "Andrey V. Zhmurin" <zhmurin_a@mcst.ru
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Definitions of POLLWRNORM, POLLWRBAND and POLLREMOVE in xtensa linux
kernel are non-standard. Provide bits/poll.h with correct values for
these constants.
This fixes the following strace build errors:
In file included from xlat/pollflags.h:4:0,
from poll.c:34:
./static_assert.h:40:24: error: static assertion failed: "POLLWRBAND != 0x0100"
# define static_assert _Static_assert
^
xlat/pollflags.h:75:1: note: in expansion of macro ‘static_assert’
static_assert((POLLWRBAND) == (0x0100), "POLLWRBAND != 0x0100");
^~~~~~~~~~~~~
./static_assert.h:40:24: error: static assertion failed: "POLLREMOVE != 0x0800"
# define static_assert _Static_assert
^
xlat/pollflags.h:117:1: note: in expansion of macro ‘static_assert’
static_assert((POLLREMOVE) == (0x0800), "POLLREMOVE != 0x0800");
^~~~~~~~~~~~~
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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I've got several patches to fix ltp/openmp/uclibc-ng-test testcase fail on
c-sky.
- fix a ltp testcase.
- fix the problem that pthread creat will fail when libomp is linked before
libc, the variable pagesize is not init.
- fix tst-cancel4 and tst-cancel16. tst-cancelx4 and tst-cancelx16 still fail
with this patch applied, cleanup handler is not called for open/creat/fcntl,
seems some thing wrong with unwind, I haven't check the rootcause yet.
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Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Signed-off-by: Mao Han <han_mao@c-sky.com>
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Fix issues with aarch64 and df with mismatching header between kernel
and libc.
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On Linux/MIPS (O32 ABI) for system call we have two result registers - v0 and a3.
v0 contains actual syscall result on success or error number on fail, a3 set to 0/1
for indicating syscall success/fail. (if a3 == 1, v0 contains errno).
Now as we can see from definition of handle_sys (arch/mips/kernel/scall32-o32.S),
handler treats returned by syscall function (let's call "original") values in
range [-EMAXERRNO; 0[ as -errno, a3 is set to 1 and final returned (to userspace)
value is (-original).
INLINE_SYSCALL_NOERR_NCS defined in mips/bits/syscalls.h will handle
this behaviour.
Signed-off-by: Volodymyr Boyko <boyko.cxx@gmail.com>
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* ldso/ldso/arm/aeabi_read_tp.S: Add Thumb version.
* ldso/ldso/arm/dl-startup.h: Do not force ARM encoding, adjust
for Thumb.
* ldso/ldso/arm/resolve.S: Force Thumb encoding on Thumb-only
processors.
* libc/sysdeps/linux/arm/crt1.S: Do not force ARM encoding, adjust
for Thumb.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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Added in kernel in kernel 3.10 in
1ff3c9677bff ("timekeeping: Add CLOCK_TAI clockid")
NOTE: CLOCK_SGI_CYCLE was not added, as it has been lately removed.
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
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This should have been made in commit 9649721950 but was forgotten.
Signed-off-by: Carlos Santos <casantos@datacom.com.br>
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[1] fixes clash of TLS variables on ARC and since LD now calculates relocations
a bit different now we need to update dynamic loader as well otherwise relocs
will be calculated improperly.
Note this is an ABI change and should go in-line with corresponding ARC tools.
That said either arc-2018.09 (to be released in few weeks) or the next version of upstream
Binutils (2.32) are required for normal TLS work on ARC.
Testcase:
----------------------------------8<-------------------------------
#include <stdio.h>
int foo3(void);
int foo1(void);
#ifdef _SHARED
int foo1(){
static __thread int val3=1;
val3 += 2;
return val3;
}
#elif _SHARED2
int foo3(){
static __thread int val2=0;
val2 += 2;
return val2;
}
#else
int main(){
printf("foo1 = %d \n", foo1());
printf("foo3 = %d \n", foo3());
return 0;
}
#endif
--------------------------------->8---------------------------------------
The result shoud be:
----8<----
foo1 = 3
foo3 = 2
---->8----
Commands to build artefacts:
----------------------------------------8<-------------------------------
arc-linux-gcc -fPIE -ffunction-sections -fdata-sections -pthread -Os \
-fPIC -o testtls.o -D_SHARED -c tst.c
arc-linux-gcc -fPIE -ffunction-sections -fdata-sections -pthread -Os \
-fPIC -o testtls2.o -D_SHARED2 -c tst.c
arc-linux-gcc -shared -o libtesttls.so testtls.o testtls2.o -lm -Os
arc-linux-gcc tst.c -o tst.out -L./ -ltesttls -Os -fPIE
--------------------------------->8---------------------------------------
Add path to libtesttls.so file to LD_LIBRARY_PATH before runnig
tst.out application.
[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=714e9a954a2e4123dcb26bb8da850e1344de4f5f
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Evgeniy Didin <didin@synopsys.com>
CC: Cupertino Miranda <cmiranda@synopsys.com>
CC: Vineet Gupta <vgupta@synopsys.com>
CC: Waldemar Brodkorb <wbx@uclibc-ng.org>
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Signed-off-by: Guo Ren <ren_guo@c-sky.com>
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The original from glibc received the end of the buffer and worked
backwards. Ours needs the beginning of the buffer.
Signed-off-by: Segev Finer <segev208@gmail.com>
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Call getpid() in INTERNAL_SYSCALL will break the argument regs,
because gcc couldn't save destoryed regs for system call asm.
Ref to glibc, we could just remove all the check code.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
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R_ARM_NONE contains no data, so avoid dereferencing it.
* ldso/ldso/arm/elfinterp.c (_dl_do_reloc): Handle R_ARM_NONE
relocation
(_dl_do_reloc_lazy): Likewise.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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Handle EISDIR in shm_open like glibc does, and set EINVAL.
* librt/shm.c (shm_open): Handle EISDIR error.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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Match glibc behavior.
* libc/stdlib/stdlib.c (mbtowc): Fix end of string behavior.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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* libm/s_isnan.c: Add isnan weak alias.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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dlclose can crash or stuck the system:
When calling dlclose() then system can crash or freeze, because
htab_delete() in ldso/ldso/fdpic/dl-inlines.h uses size_t for i which
is a typedef to unsigned int. We exit the loop on negative value of i
which can never occur since i is an unsigned int. This leads to random
free of various pointers that kill the system.
* ldso/include/inline-hashtab.h (htab_delete): Change type of 'i' to int.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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In case __nptl_nthreads is not defined in the final binary then avoid
dereferencing the address since it's null. Anyway this means there is
no other thread and so we must exit.
* libc/misc/internals/__uClibc_main.c (__uClibc_main): Handle case
where &__nptl_nthreads is null.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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Replace sbrk with mmap since this commit disables sbrk area
for FDPIC MMU-less platform:
fs/binfmt_elf_fdpic.c: fix brk area overlap with stack on NOMMU
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/binfmt_elf_fdpic.c?id=4ac313111018cb44ecc250445de5ccb93026a980
* libpthread/nptl/sysdeps/generic/libc-tls.c (__libc_setup_tls):
Handle __FDPIC__.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
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