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Re: AArch64's Setting DT_TEXTREL Is too Strict.
- From: Jiong Wang <jiong dot wang at arm dot com>
- To: lin zuojian <manjian2006 at gmail dot com>, binutils at sourceware dot org
- Date: Thu, 13 Aug 2015 12:26:24 +0100
- Subject: Re: AArch64's Setting DT_TEXTREL Is too Strict.
- Authentication-results: sourceware.org; auth=none
- References: <20150813090116 dot GA13666 at ubuntu>
On 13/08/15 10:01, lin zuojian wrote:
I find that on aarch64, DT_TEXTREL is set in dynamic section when my
object just has read-only section relocation. On
aarch64-linux-android, this will cause the following error:
text relocations (DT_TEXTREL) found in 64-bit ELF file...
And the shared objects will fail to load.
Android use bionic dynamic linker which has different implemention, it
may be lack of full support of ELF specification. Looks like they forbid
64bit elf to have DT_TEXTREL, I am not sure whether this is caused by
Android is originally designed for 32bit processor, 64bit Android is running
within two years? some corner cases in 64bit bionic may have not be
Here is the code causes trouble.
/* Find any dynamic relocs that apply to read-only sections. */
aarch64_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
struct elf_aarch64_link_hash_entry * eh;
struct elf_dyn_relocs * p;
eh = (struct elf_aarch64_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
asection *s = p->sec;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
struct bfd_link_info *info = (struct bfd_link_info *) inf;
info->flags |= DF_TEXTREL;
/* Not an error, just cut short the traversal. */
Would it be better to change this to .text section only?
Thank you for reading.