binutils-gdb/ld/testsuite/ld-i386/pr18801.s

	.text
	.type   selector, %function
foo:
	movl	$0, %eax
	ret
selector:
	mov	$foo, %eax
	ret
	.type   selector, %gnu_indirect_function
	.globl	_start
_start:
	mov	$selector, %eax
	call	*%eax
	ret
	.section	.note.GNU-stack,"",@progbits
Issue an error for read-only segment with dynamic IFUNC relocations To load an ELF binary with DT_TEXTREL tag, the dynamic linker calls __mprotect on the read-only segment with PROT_READ\|PROT_WRITE before applying dynamic relocation. It leads to segfault when performing IFUNC relocations since the read-only segment has no execute permission. This patch changes x86 linker to issue an error for read-only segment with dynamic IFUNC relocations. Other backends with IFUNC support may need a similar change. bfd/ PR ld/18801 * elf32-i386.c (elf_i386_size_dynamic_sections): Issue an error for read-only segment with dynamic IFUNC relocations. * elf64-x86-64.c (elf_x86_64_size_dynamic_sections): Likewise. ld/testsuite/ PR ld/18801 * ld-i386/i386.exp: Run pr18801. * ld-x86-64/x86-64.exp: Likewise. * ld-i386/pr18801.d: New file. * ld-i386/pr18801.s: Likewise. * ld-x86-64/pr18801.d: Likewise. * ld-x86-64/pr18801.s: Likewise. 2015-08-13 19:31:38 +08:00			`.text`
			`.type selector, %function`
			`foo:`
			`movl $0, %eax`
			`ret`
			`selector:`
			`mov $foo, %eax`
			`ret`
			`.type selector, %gnu_indirect_function`
			`.globl _start`
			`_start:`
			`mov $selector, %eax`
			`call *%eax`
			`ret`
			`.section .note.GNU-stack,"",@progbits`