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0c78549fbc
glibc/glibc-fedora-revert-PT_LOAD-segment-align.patch
Arjun Shankar 0c78549fbc Auto-sync with upstream branch master 
Upstream commit: 0884724a95b60452ad483dbe086d237d02ba624d

- Add glibc-fedora-revert-PT_LOAD-segment-align.patch to revert upstream
  commits 718fdd87b1b9 and fc2334ab32e0.
- intl: Emit no lines in bison generated files
- hurd: Do not set PIE_UNSUPPORTED
- NEWS: Move LD_PREFER_MAP_32BIT_EXEC
- mach: Fix spurious inclusion of stack_chk_fail_local in libmachuser.a
- Disable DT_RUNPATH on NSS tests [BZ #28455]
- sysdeps: Simplify sin Taylor Series calculation
- math: Remove the error handling wrapper from hypot and hypotf
- math: Use fmin/fmax on hypot
- aarch64: Add math-use-builtins-f{max,min}.h
- math: Add math-use-builtinds-fmin.h
- math: Add math-use-builtinds-fmax.h
- math: Remove powerpc e_hypot
- i386: Move hypot implementation to C
- math: Use an improved algorithm for hypotl (ldbl-128)
- math: Use an improved algorithm for hypotl (ldbl-96)
- math: Improve hypot performance with FMA
- math: Use an improved algorithm for hypot (dbl-64)
- math: Simplify hypotf implementation
- Cleanup encoding in comments
- Replace --enable-static-pie with --disable-default-pie
- hurd: Add rules for static PIE build
- hurd: Fix gmon-static
- x86-64: Remove LD_PREFER_MAP_32BIT_EXEC support [BZ #28656]
- elf: Use errcode instead of (unset) errno in rtld_chain_load
- Add a testcase to check alignment of PT_LOAD segment [BZ #28676]
- elf: Properly align PT_LOAD segments [BZ #28676]
- elf: Install a symbolic link to ld.so as /usr/bin/ld.so
- nptl: Add one more barrier to nptl/tst-create1
- Remove TLS_TCB_ALIGN and TLS_INIT_TCB_ALIGN
- nptl: rseq failure after registration on main thread is fatal
- nptl: Add public rseq symbols and <sys/rseq.h>
- nptl: Add glibc.pthread.rseq tunable to control rseq registration
- Linux: Use rseq to accelerate sched_getcpu
- nptl: Add rseq registration
- nptl: Introduce THREAD_GETMEM_VOLATILE
- nptl: Introduce <tcb-access.h> for THREAD_* accessors
- nptl: Add <thread_pointer.h> for defining __thread_pointer
- String: test-memcpy used unaligned types for buffers [BZ 28572]
- localedef: check magic value on archive load [BZ #28650]
- x86: Don't set Prefer_No_AVX512 for processors with AVX512 and AVX-VNNI
- linux: Add generic ioctl implementation
- linux: Add generic syscall implementation
- misc, nptl: Remove stray references to __condvar_load_64_relaxed
- csu: Always use __executable_start in gmon-start.c
- elf: execve statically linked programs instead of crashing [BZ #28648]
- Add --with-timeoutfactor=NUM to specify TIMEOUTFACTOR
2021-12-14 15:20:32 +01:00

265 lines
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This patch reverts the following commits:
commit fc2334ab32e04916832955301225a9785c36dac1
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu Dec 9 07:01:33 2021 -0800
Add a testcase to check alignment of PT_LOAD segment [BZ #28676]
commit 718fdd87b1b98ef88e883a37d9c18867256fa5a4
Author: Rongwei Wang <rongwei.wang@linux.alibaba.com>
Date: Fri Dec 10 20:39:10 2021 +0800
elf: Properly align PT_LOAD segments [BZ #28676]
When PT_LOAD segment alignment > the page size, allocate enough space to
ensure that the segment can be properly aligned. This change helps code
segments use huge pages become simple and available.
This fixes [BZ #28676].
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
diff --git a/elf/Makefile b/elf/Makefile
index fe42caeb0eec9a1b..d0bb0daa7e309157 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -207,7 +207,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tst-tls4 tst-tls5 \
tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-tls15 \
tst-tls16 tst-tls17 tst-tls18 tst-tls19 tst-tls-dlinfo \
- tst-align tst-align2 tst-align3 \
+ tst-align tst-align2 \
tst-dlmodcount tst-dlopenrpath tst-deep1 \
tst-dlmopen1 tst-dlmopen3 tst-dlmopen4 \
unload3 unload4 unload5 unload6 unload7 unload8 tst-global1 order2 \
@@ -241,9 +241,6 @@ tests-internal += loadtest unload unload2 circleload1 \
tests-container += tst-pldd tst-dlopen-tlsmodid-container \
tst-dlopen-self-container tst-preload-pthread-libc
test-srcs = tst-pathopt
-ifeq (yes,$(have-fpie))
-tests-pie += tst-align3
-endif
selinux-enabled := $(shell cat /selinux/enforce 2> /dev/null)
ifneq ($(selinux-enabled),1)
tests-execstack-yes = tst-execstack tst-execstack-needed tst-execstack-prog
@@ -305,7 +302,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
circlemod3 circlemod3a \
reldep8mod1 reldep8mod2 reldep8mod3 \
reldep9mod1 reldep9mod2 reldep9mod3 \
- tst-alignmod tst-alignmod2 tst-alignmod3 \
+ tst-alignmod tst-alignmod2 \
$(modules-execstack-$(have-z-execstack)) \
tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 \
tst-dlmopen1mod tst-auditmod1 \
@@ -1096,13 +1093,6 @@ CFLAGS-tst-alignmod.c += $(stack-align-test-flags)
CFLAGS-tst-alignmod2.c += $(stack-align-test-flags)
$(objpfx)tst-align.out: $(objpfx)tst-alignmod.so
$(objpfx)tst-align2: $(objpfx)tst-alignmod2.so
-$(objpfx)tst-align3: $(objpfx)tst-alignmod3.so
-ifeq (yes,$(have-fpie))
-CFLAGS-tst-align3.c += $(PIE-ccflag)
-endif
-LDFLAGS-tst-align3 += -Wl,-z,max-page-size=0x200000
-LDFLAGS-tst-alignmod3.so += -Wl,-z,max-page-size=0x200000
-$(objpfx)tst-alignmod3.so: $(libsupport)
$(objpfx)unload3.out: $(objpfx)unload3mod1.so $(objpfx)unload3mod2.so \
$(objpfx)unload3mod3.so $(objpfx)unload3mod4.so
diff --git a/elf/dl-load.c b/elf/dl-load.c
index 721593135e307f88..bf8957e73c32021a 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -1,6 +1,5 @@
/* Map in a shared object's segments from the file.
Copyright (C) 1995-2021 Free Software Foundation, Inc.
- Copyright The GNU Toolchain Authors.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -1151,7 +1150,6 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd,
c->mapend = ALIGN_UP (ph->p_vaddr + ph->p_filesz, GLRO(dl_pagesize));
c->dataend = ph->p_vaddr + ph->p_filesz;
c->allocend = ph->p_vaddr + ph->p_memsz;
- c->mapalign = ph->p_align;
c->mapoff = ALIGN_DOWN (ph->p_offset, GLRO(dl_pagesize));
/* Determine whether there is a gap between the last segment
diff --git a/elf/dl-load.h b/elf/dl-load.h
index e6dabcb3368fd240..e329d49a813f2376 100644
--- a/elf/dl-load.h
+++ b/elf/dl-load.h
@@ -1,6 +1,5 @@
/* Map in a shared object's segments from the file.
Copyright (C) 1995-2021 Free Software Foundation, Inc.
- Copyright The GNU Toolchain Authors.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -75,7 +74,7 @@ ELF_PREFERRED_ADDRESS_DATA;
Its details have been expanded out and converted. */
struct loadcmd
{
- ElfW(Addr) mapstart, mapend, dataend, allocend, mapalign;
+ ElfW(Addr) mapstart, mapend, dataend, allocend;
ElfW(Off) mapoff;
int prot; /* PROT_* bits. */
};
diff --git a/elf/dl-map-segments.h b/elf/dl-map-segments.h
index 70a4c40695024028..f9fb110ee32ba8fd 100644
--- a/elf/dl-map-segments.h
+++ b/elf/dl-map-segments.h
@@ -1,6 +1,5 @@
/* Map in a shared object's segments. Generic version.
Copyright (C) 1995-2021 Free Software Foundation, Inc.
- Copyright The GNU Toolchain Authors.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -19,50 +18,6 @@
#include <dl-load.h>
-/* Map a segment and align it properly. */
-
-static __always_inline ElfW(Addr)
-_dl_map_segment (const struct loadcmd *c, ElfW(Addr) mappref,
- const size_t maplength, int fd)
-{
- if (__glibc_likely (c->mapalign <= GLRO(dl_pagesize)))
- return (ElfW(Addr)) __mmap ((void *) mappref, maplength, c->prot,
- MAP_COPY|MAP_FILE, fd, c->mapoff);
-
- /* If the segment alignment > the page size, allocate enough space to
- ensure that the segment can be properly aligned. */
- ElfW(Addr) maplen = (maplength >= c->mapalign
- ? (maplength + c->mapalign)
- : (2 * c->mapalign));
- ElfW(Addr) map_start = (ElfW(Addr)) __mmap ((void *) mappref, maplen,
- PROT_NONE,
- MAP_ANONYMOUS|MAP_PRIVATE,
- -1, 0);
- if (__glibc_unlikely ((void *) map_start == MAP_FAILED))
- return map_start;
-
- ElfW(Addr) map_start_aligned = ALIGN_UP (map_start, c->mapalign);
- map_start_aligned = (ElfW(Addr)) __mmap ((void *) map_start_aligned,
- maplength, c->prot,
- MAP_COPY|MAP_FILE|MAP_FIXED,
- fd, c->mapoff);
- if (__glibc_unlikely ((void *) map_start_aligned == MAP_FAILED))
- __munmap ((void *) map_start, maplen);
- else
- {
- /* Unmap the unused regions. */
- ElfW(Addr) delta = map_start_aligned - map_start;
- if (delta)
- __munmap ((void *) map_start, delta);
- ElfW(Addr) map_end = map_start_aligned + maplength;
- delta = map_start + maplen - map_end;
- if (delta)
- __munmap ((void *) map_end, delta);
- }
-
- return map_start_aligned;
-}
-
/* This implementation assumes (as does the corresponding implementation
of _dl_unmap_segments, in dl-unmap-segments.h) that shared objects
are always laid out with all segments contiguous (or with gaps
@@ -98,7 +53,10 @@ _dl_map_segments (struct link_map *l, int fd,
- MAP_BASE_ADDR (l));
/* Remember which part of the address space this object uses. */
- l->l_map_start = _dl_map_segment (c, mappref, maplength, fd);
+ l->l_map_start = (ElfW(Addr)) __mmap ((void *) mappref, maplength,
+ c->prot,
+ MAP_COPY|MAP_FILE,
+ fd, c->mapoff);
if (__glibc_unlikely ((void *) l->l_map_start == MAP_FAILED))
return DL_MAP_SEGMENTS_ERROR_MAP_SEGMENT;
diff --git a/elf/tst-align3.c b/elf/tst-align3.c
deleted file mode 100644
index ac86d623a62f9e0f..0000000000000000
--- a/elf/tst-align3.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/* Check alignment of PT_LOAD segment in a shared library.
- Copyright (C) 2021 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
-
-#include <support/check.h>
-#include <tst-stack-align.h>
-
-/* This should cover all possible page sizes we currently support. */
-#define ALIGN 0x200000
-
-int bar __attribute__ ((aligned (ALIGN))) = 1;
-
-extern int do_load_test (void);
-
-static int
-do_test (void)
-{
- printf ("bar: %p\n", &bar);
- TEST_VERIFY (is_aligned (&bar, ALIGN) == 0);
-
- return do_load_test ();
-}
-
-#include <support/test-driver.c>
diff --git a/elf/tst-alignmod3.c b/elf/tst-alignmod3.c
deleted file mode 100644
index 0d33f2379d1c04aa..0000000000000000
--- a/elf/tst-alignmod3.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Check alignment of PT_LOAD segment in a shared library.
- Copyright (C) 2021 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
-
-#include <support/check.h>
-#include <tst-stack-align.h>
-
-/* This should cover all possible page sizes we currently support. */
-#define ALIGN 0x200000
-
-int foo __attribute__ ((aligned (ALIGN))) = 1;
-
-void
-do_load_test (void)
-{
- printf ("foo: %p\n", &foo);
- TEST_VERIFY (is_aligned (&foo, ALIGN) == 0);
-}
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