binutils-gdb/ld/testsuite/ld-x86-64/pr12921.d
H.J. Lu 241e64e3b4 x86: Add a GNU_PROPERTY_X86_ISA_1_USED note if needed
When -z separate-code, which is enabled by default for Linux/x86, is
used to create executable, ld won't place any data in the code-only
PT_LOAD segment.  If there are no data sections placed before the
code-only PT_LOAD segment, the program headers won't be mapped into
any PT_LOAD segment.  When the executable tries to access it (based
on the program header address passed in AT_PHDR), it will lead to
segfault.  This patch inserts a GNU_PROPERTY_X86_ISA_1_USED note if
there may be no data sections before the text section so that the
first PT_LOAD segment won't be code-only and will contain the program
header.

Testcases are adjusted to either pass "-z noseparate-code" to ld or
discard the .note.gnu.property section.  A Linux/x86 run-time test is
added.

bfd/

	PR ld/23428
	* elfxx-x86.c (_bfd_x86_elf_link_setup_gnu_properties): If the
	separate code program header is needed, make sure that the first
	read-only PT_LOAD segment has no code by adding a
	GNU_PROPERTY_X86_ISA_1_USED note.

ld/

	PR ld/23428
	* testsuite/ld-elf/linux-x86.S: New file.
	* testsuite/ld-elf/linux-x86.exp: Likewise.
	* testsuite/ld-elf/pr23428.c: Likewise.
	* testsuite/ld-elf/sec64k.exp: Pass "-z noseparate-code" to ld
	for Linux/x86 targets.
	* testsuite/ld-i386/abs-iamcu.d: Likewise.
	* testsuite/ld-i386/abs.d: Likewise.
	* testsuite/ld-i386/pr12718.d: Likewise.
	* testsuite/ld-i386/pr12921.d: Likewise.
	* testsuite/ld-x86-64/abs-k1om.d: Likewise.
	* testsuite/ld-x86-64/abs-l1om.d: Likewise.
	* testsuite/ld-x86-64/abs.d: Likewise.
	* testsuite/ld-x86-64/pr12718.d: Likewise.
	* testsuite/ld-x86-64/pr12921.d: Likewise.
	* testsuite/ld-linkonce/zeroeh.ld: Discard .note.gnu.property
	section.
	* testsuite/ld-scripts/print-memory-usage.t: Likewise.
	* testsuite/ld-scripts/size-2.t: Likewise.
	* testsuite/lib/ld-lib.exp (run_ld_link_exec_tests): Use ld
	to create executable if language is "asm".
2018-07-20 09:19:00 -07:00

19 lines
704 B
Makefile

#name: PR ld/12921
#as: --64
#ld: -melf_x86_64 -z noseparate-code
#readelf: -S --wide
There are 7 section headers, starting at offset 0x[0-9a-f]+:
Section Headers:
+\[Nr\] Name +Type +Address +Off +Size +ES +Flg +Lk +Inf +Al
+\[ 0\] +NULL +0+ +0+ +0+ +0+ +0 +0 +0
+\[ 1\] .text +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+1 00 +AX +0 +0 +4096
+\[ 2\] .data +PROGBITS +[0-9a-f]+ +[0-9a-f]+000 +0+28 +00 +WA +0 +0 +4096
+\[ 3\] .bss +NOBITS +[0-9a-f]+ +[0-9a-f]+028 +0+10000 +00 +WA +0 +0 +4096
+\[ 4\] .symtab +SYMTAB +0+ +[0-9a-f]+ +[0-9a-f]+ +18 +5 +[0-9] +8
+\[ 5\] .strtab +STRTAB +0+ +[0-9a-f]+ +[0-9a-f]+ +00 +0 +0 +1
+\[ 6\] .shstrtab +STRTAB +0+ +[0-9a-f]+ +0+2c +00 +0 +0 +1
Key to Flags:
#pass