Commit db106f69 authored Aug 05, 2019 by Vasily Gorbik Committed by Greg Kroah-Hartman Aug 29, 2019

s390: put _stext and _etext into .text section



[ Upstream commit 24350fdadbdec780406a1ef988e6cd3875e374a8 ]

Perf relies on _etext and _stext symbols being one of 't', 'T', 'v' or
'V'. Put them into .text section to guarantee that.

Also moves padding to page boundary inside .text which has an effect that
.text section is now padded with nops rather than 0's, which apparently
has been the initial intention for specifying 0x0700 fill expression.

Reported-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Suggested-by: Andreas Krebbel <krebbel@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 33bdea17

arch/s390/kernel/vmlinux.lds.S

+4 −6

Original line number	Diff line number	Diff line
		@@ -31,10 +31,9 @@ PHDRS {
		SECTIONS
		{
		. = 0x100000;
		_stext = .; /* Start of text section */
		.text : {
		/* Text and read-only data */
		_text = .;
		_stext = .; /* Start of text section */
		_text = .; /* Text and read-only data */
		HEAD_TEXT
		TEXT_TEXT
		SCHED_TEXT
		@@ -46,10 +45,9 @@ SECTIONS
		(.text._indirect_*)
		*(.fixup)
		*(.gnu.warning)
		} :text = 0x0700

		. = ALIGN(PAGE_SIZE);
		_etext = .; /* End of text section */
		} :text = 0x0700

		NOTES :text :note