PR32266, segv when linking libclang_rt.asan-powerpc64.so

Change the mmap support added with commit 9ba56acee518 to always mmap
memory with PROT_READ | PROT_WRITE.  Prior to that commit most file
contents were read into a buffer allocated with bfd_alloc or
bfd_malloc and thus the memory was read/write.  Even after that commit
any section contents with relocations must be read/write to apply the
relocs.  Making them all read/write is not a major change, and it
should not introduce any measurable linker slowdown for contents that
are not modified.  More importantly, it removes a BFD behaviour
difference that only triggers when large files are involved.

	PR 32266
	PR 32109
	* libbfd.c (bfd_mmap_local): Remove prot param.  Always mmap
	with PROT_READ | PROT_WRITE.  Adjust all calls.
	(_bfd_mmap_temporary): Rename from _bfd_mmap_readonly_temporary.
	(_bfd_munmap_temporary): Rename from _bfd_munmap_readonly_temporary.
	_bfd_mmap_persistent): Rename from _bfd_mmap_readonly_persistent.
	(_bfd_generic_get_section_contents): Use PROT_READ | PROT_WRITE
	regardless of relocs.
	* libbfd-in.h: Update decls to suit.  Make non-USE_MMAP variants
	static inline functions.
	* elflink.c: Update all uses of _bfd_mmap functions.
	* elf.c: Likewise.
	(bfd_elf_get_str_section): Revert commit 656f8fbaae.
	* libbfd.h: Regenerate.

0 files changed, 0 insertions, 0 deletions