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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2015-11-03 10:13:18 -0200
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-05-11 17:27:30 -0300
commitf6a191a6ee0313d61dffa70d86b033c5a598f907 (patch)
treeb4e748887ab6a83601122f9a9259bb34471dfc2e /io
parentcab6e5af9d51d4398522af782e20c743daf37461 (diff)
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Consolidate Linux read syscall
This patch consolidates the read Linux syscall implementation on
sysdeps/unix/sysv/linux/read.c.  This leads to a different frame
pointer creation on some architectures:

  * It fixes BZ#21428 on aarch64, since now the returned address
    for the read syscall can be correctly found out by
    backtrace_symbols.

  * It makes tst-backtrace{5,6} fails on powerpc due an issue on
    its custom backtrace implementation.  It is fixed on subsequent
    patch from this set.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.

	[BZ #21428]
	* include/unistd.h (read): Add hidden proto.
	* io/Makefile (CFLAGS-read.c): New rule.
	* nptl/Makefile (CFLAGS-read.c): New rule.
	* sysdeps/unix/sysv/linux/read.c: New file.
Diffstat (limited to 'io')
-rw-r--r--io/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/io/Makefile b/io/Makefile
index 8b1c250fda..db14c0dd82 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -100,6 +100,7 @@ CFLAGS-posix_fallocate64.c = -fexceptions
 CFLAGS-fallocate.c = -fexceptions
 CFLAGS-fallocate64.c = -fexceptions
 CFLAGS-sync_file_range.c = -fexceptions
+CFLAGS-read.c = -fexceptions
 
 CFLAGS-test-stat.c = -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
 CFLAGS-test-lfs.c = -D_LARGEFILE64_SOURCE