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2020-02-16Add Safe-Linking to fastbinsEyal Itkin
Safe-Linking is a security mechanism that protects single-linked lists (such as the fastbins) from being tampered by attackers. The mechanism makes use of randomness from ASLR (mmap_base), and when combined with chunk alignment integrity checks, it protects the pointers from being hijacked by an attacker. While Safe-Unlinking protects double-linked lists (such as the small bins), there wasn't any similar protection for attacks against single-linked lists. This solution protects against 3 common attacks: * Partial pointer override: modifies the lower bytes (Little Endian) * Full pointer override: hijacks the pointer to an attacker's location * Unaligned chunks: pointing the list to an unaligned address The design assumes an attacker doesn't know where the heap is located, and uses the ASLR randomness to "sign" the single-linked pointers. We mark the pointer as P and the location in which it is stored as L, and the calculation will be: * PROTECT(P) := (L >> PAGE_SHIFT) XOR (P) * *L = PROTECT(P) This way, the random bits from the address L (which start at the bits in the PAGE_SHIFT position), will be merged with the LSB of the stored protected pointer. This protection layer prevents an attacker from modifying the pointer into a controlled value. An additional check that the chunks are MALLOC_ALIGNed adds an important layer: * Attackers can't point to illegal (unaligned) memory addresses * Attackers must guess correctly the alignment bits On standard 32 bit Linux machines, an attacker will directly fail 7 out of 8 times, and on 64 bit machines it will fail 15 out of 16 times. The proposed solution adds 3-4 asm instructions per malloc()/free() and therefore has only minor performance implications if it has any. A similar protection was added to Chromium's version of TCMalloc in 2013, and according to their documentation the performance overhead was less than 2%. Signed-off-by: Eyal Itkin <eyalit@checkpoint.com>
2020-02-07aarch64/bits: provide sigstack.hVladimir Murzin
It fixes tst-signal6 and friends. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
2020-02-07aarch64/sys: update ucontext.hVladimir Murzin
It fixes tst-cancel1 and friends. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
2020-02-07common/bits: Fix ipc_perm and semid_ds definitions for 64-bit archesVladimir Murzin
It fixes: FAIL sem got 1 expected 0 failed: incorrect sem_nsems! semget(IPC_CREAT) = 0 semctl(k) = 0 sem_nsems = 0 for aarch64. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
2020-02-03csky: add statx conditionalsWaldemar Brodkorb
Similar to glibc commit https://sourceware.org/git/?p=glibc.git;a=commit;h=6bbfc5c09fc5b5e3d4a0cddbbd4e2e457767dae7 we need to handle Linux kernel change, which removed stat64 family from default syscall set. Signed-off-by: Waldemar Brodkorb <wbx@openadk.org> Signed-off-by: Waldemar Brodkorb <wbrodkorb@conet.de>
2020-01-30Fix map_newlink abort when interface list changes during getifaddrsVincent Hou
map_newlink() may abort when interface list changed between netlink request for getting interfaces and getting addresses. This commit is ported from the same change from glibc commit. Signed-off-by: Vincent Hou <vincent.houyi@gmail.com>
2020-01-30poll: avoid calling select with empty sets which hangs the processYann Sionneau
Avoid calling select with empty sets which hangs the process This makes uClibc-ng act like glibc and musl Without this fix the test_poll of python3 testsuite hangs forever Scenario of the issue: If you call poll with only invalid file descriptors, like in python3 testsuite (https://github.com/python/cpython/blob/master/Lib/test/test_poll.py#L83) You will go through uClibc poll emulation code, which is based on select syscall. Your first call to select will fail, it will return -1 and errno will be set to EBADF: https://github.com/wbx-github/uclibc-ng/blob/master/libc/sysdeps/linux/common/poll.c#L120 Then you will go through the for loop which tests individually each file descriptor by calling select on each one: https://github.com/wbx-github/uclibc-ng/blob/master/libc/sysdeps/linux/common/poll.c#L163 each call will also return -1 with errno being equal to EBADF. Therefore all pollfd will have the POLLNVAL flag in their respective revents field. And, the most important, rset/wset/xset will stay empty. Then the for loop ends, the "continue" makes the while loop run again. The following select() is run again: https://github.com/wbx-github/uclibc-ng/blob/master/libc/sysdeps/linux/common/poll.c#L120 But this time the sets are empty. If the poll was called with timeout set to -1, this select will hang forever because there is no timeout and the sets are empty so no event will ever wake it up. test program: int main(void) { struct pollfd pfd; int ret; int pipe_fds[2]; pipe(pipe_fds); close(pipe_fds[0]); close(pipe_fds[1]); pfd.fd = pipe_fds[0]; pfd.events = POLLIN | POLLOUT | POLLPRI; pfd.revents = 0; ret = poll(&pfd, 1, -1); printf("ret: %d\n", ret); if (ret < 0) printf("error: %s", strerror(errno)); else { puts("revents: "); if (pfd.revents & POLLERR) printf(" POLLERR"); if (pfd.revents & POLLHUP) printf(" POLLHUP"); if (pfd.revents & POLLNVAL) printf(" POLLNVAL"); puts(""); } return 0; } This hangs on uClibc-ng aarch64 and Kalray's arch (kv3) but does the following on musl and glibc: " ret: 1 revents: POLLNVAL " strace output of this program with uClibc *without* the patch applied: pselect6(4, [3], [3], [3], NULL, NULL) = -1 EBADF (Bad file descriptor) pselect6(4, [3], [3], [3], {tv_sec=0, tv_nsec=0}, NULL) = -1 EBADF (Bad file descriptor) pselect6(0, 0x7ffffffb80, 0x7ffffffb68, 0x7ffffffb50, NULL, NULL (never finishes) strace output of this program with uClibc *with* the patch applied: pselect6(4, [3], [3], [3], NULL, NULL) = -1 EBADF (Bad file descriptor) pselect6(4, [3], [3], [3], {tv_sec=0, tv_nsec=0}, NULL) = -1 EBADF (Bad file descriptor) write(1, "ret: 1\n", 7ret: 1 ) = 7 write(1, "revents: \n", 10revents: ) = 10 write(1, " POLLNVAL\n", 10 POLLNVAL ) = 10 exit_group(0) = ? +++ exited with 0 +++
2020-01-28fix getenv bugAta, John (US)
The getenv() library call can trap under certain conditions. It compares the passed in environment variable name (var) with the name=variables (*ep) in the environment area and returns a pointer to the value in the environment if it exists. To accomplish this, it does a memcmp() using the length of the passed in name (len) for each environment variable (*ep) against the passed in name ( var). So memcmp will attempt to scan both strings for len bytes. However, if for some reason, len is equal to or greater than 16 and longer than the length of the *ep in the environment and the *ep resides near the end of a page boundary while the next page is not present or mapped, the memcmp could trap with a sigsegv error while continuing the scan with the optimization read-ahead. However, if strncmp is used instead, there is no problem since both source and destination scanning will stop when either reaches a terminating NULL
2019-11-17fix PTRAVE_EVENT_SECCOMP typo in ptrace.hJoris Vink
Hi, This diff fixes a typo in the PTRACE_EVENT_SECCOMP event code. The typo itself was introduced in 2012 when syncing with glibc header files and was itself fixed in 2013 in the glibc headers.
2019-11-08riscv64: implement NPTL/TLSWaldemar Brodkorb
basically from or1k port of uClibc-ng, with fixes for structures in pthreadtypes.h from 64 bit architectures. 18 testsuite failures counted.
2019-11-06riscv64: lazy relocations do not work like sparc/m68kWaldemar Brodkorb
2019-11-05implement fexecve from glibcWaldemar Brodkorb
2019-11-01riscv64: add shared library supportWaldemar Brodkorb
2019-10-30Make __syscall_error return long, as expected by syscall() callersCarlos Santos
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>
2019-10-15Fix value for O_mask_was_saved based on gdb observationmirabilos
(gdb) print offsetof(struct __jmp_buf_tag, __mask_was_saved) $12 = (int *) 0x1f0 using https://stackoverflow.com/a/39663128/2171120
2019-10-15sparc64: Make structure match kernel uapimirabilos
Update from linux/arch/sparc/include/uapi/asm/uctx.h
2019-10-15sparc64: Use the jmpbuf-offsets.h header instead of duplicating itmirabilos
2019-10-10aarch64: sync with glibc code to see any differences in a better wayWaldemar Brodkorb
2019-10-05or1k: Fix compiling with PIC and latest binutils use PLT for __syscall_errorStafford Horne
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>
2019-09-30malloc: Add missing locks for some paths (valloc/memalign/posix_memalign)Kjetil Oftedal
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>
2019-09-30PowerPC: Fix termios definitionsAdhemerval Zanella
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 ]
2019-07-05mips: avoid calling memcpy() from memmove() for MIPS archPetar Jovanovic
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>
2019-07-05riscv: clear a3/a4 in crt1Christoph Hellwig
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>
2019-07-05riscv: add the MAP_UNINITIALIZED definitionChristoph Hellwig
This avoids a nommu build failure. Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-06-21fix opendir, fpathconf and ttyname_r to use fstat64(), not fstat()Denys Vlasenko
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>
2019-05-27mips: fix memmove() call when __ARCH_HAS_BWD_MEMCPY__ is not definedPetar Jovanovic
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>
2019-05-27sparc: remove asm constraintRomain Naour
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
2019-05-13preadv/pwritev: fix offset argument typeMax Filippov
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>
2019-05-13xtensa: don't use l32r opcode explicitlyMax Filippov
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>
2019-04-14Fix TLS allocation and loading in !SHARED caseYann Sionneau
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>
2019-03-02Fix NULL pointer dereference in open_memstream()Eugene Yudin
--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>
2018-12-14fix issues in ethers.cWaldemar Brodkorb
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
2018-12-14xtensa: add custom bits/poll.hMax Filippov
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>
2018-12-14several patches for uclibc nghan_mao@c-sky.com
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.
2018-11-27statfs.h: sync generic header with glibcWaldemar Brodkorb
Fix issues with aarch64 and df with mismatching header between kernel and libc.
2018-11-23Defined INLINE_SYSCALL_NOERR_NCS in mips/bits/syscalls.hVolodymyr Boyko
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>
2018-11-01Add support for Thumb-only processors.Christophe Lyon
* 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>
2018-11-01time.h: Add CLOCK_TAIPetr Vorel
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>
2018-11-01mkostemp64: clear flags, as mkostemp doesCarlos Santos
This should have been made in commit 9649721950 but was forgotten. Signed-off-by: Carlos Santos <casantos@datacom.com.br>
2018-10-20do not expose recvmmsg/sendmmsg for unsupported kernelsWaldemar Brodkorb
2018-09-21bugfix renameat2 wrong implement.Guo Ren
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
2018-09-21wordexp: Fix the usage of the internal _itoa functionSegev Finer
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>
2018-08-16sched_setaffinity: use the same style with glibc'sGuo Ren
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>
2018-08-10mbtowc: Fix non compliant behavior for end of stringChristophe Lyon
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>
2018-08-10nptl threads: Fix bug in using a weak variable.Christophe Lyon
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>
2018-08-10nptl: Use vfork on MMU-less for system()Christophe Lyon
* libc/stdlib/system.c (FORK): Map to vfork if __ARCH_USE_MMU__ is defined. Signed-off-by: Mickaël Guêné <mickael.guene@st.com> Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
2018-08-10arm/clone.S: Fix threading supportChristophe Lyon
Change clone.S so that in FDPIC case we take into account the fact that we are given a function descriptor. * libc/sysdeps/linux/arm/clone.S (__clone): Support __FDPIC__. Signed-off-by: Mickaël Guêné <mickael.guene@st.com> Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
2018-08-10Allow to generate PIE 'static' binaryChristophe Lyon
* libc/misc/internals/__uClibc_main.c (funcdesc_value): New. (fdpic_init_array_jump): New. (__uClibc_fini): Support __FDPIC__. (__uClibc_main): Likewise. Signed-off-by: Mickaël Guêné <mickael.guene@st.com> Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
2018-08-10Add runtime support needed for C++ exceptionsChristophe Lyon
Implements __gnu_Unwind_Find_got(), which is called from libgcc while unwinding. * libc/sysdeps/linux/arm/Makefile.arch (CSRC): Add find._got.c. * libc/sysdeps/linux/arm/find_got.c: New file. Signed-off-by: Mickaël Guêné <mickael.guene@st.com> Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
2018-08-10Add application startup code for FDPICChristophe Lyon
* libc/sysdeps/linux/arm/crt1.S: Define _start for __FDPIC__. Signed-off-by: Mickaël Guêné <mickael.guene@st.com> Signed-off-by: Christophe Lyon <christophe.lyon@st.com>