elf: Reset alignment for each PT_LOAD segment

Reset alignment for each PT_LOAD segment to avoid using alignment from
the previous PT_LOAD segment.

bfd/

	PR ld/29435
	* elf.c (assign_file_positions_for_load_sections): Reset
	alignment for each PT_LOAD segment.

ld/

	PR ld/29435
	* testsuite/ld-elf/pr29435.d: New file.
	* testsuite/ld-elf/pr29435.s: Likewise.

bfd/elf.c

@@ -5440,8 +5440,6 @@ assign_file_positions_for_load_sections (bfd *abfd,
   Elf_Internal_Phdr *p;
   file_ptr off;  /* Octets.  */
   bfd_size_type maxpagesize;
-  bfd_size_type p_align;
-  bool p_align_p = false;
   unsigned int alloc, actual;
   unsigned int i, j;
   struct elf_segment_map **sorted_seg_map;
@@ -5526,7 +5524,6 @@ assign_file_positions_for_load_sections (bfd *abfd,
     qsort (sorted_seg_map, alloc, sizeof (*sorted_seg_map),
 	   elf_sort_segments);
 
-  p_align = bed->p_align;
   maxpagesize = 1;
   if ((abfd->flags & D_PAGED) != 0)
     {
@@ -5561,6 +5558,8 @@ assign_file_positions_for_load_sections (bfd *abfd,
       asection **secpp;
       bfd_vma off_adjust;  /* Octets.  */
       bool no_contents;
+      bfd_size_type p_align;
+      bool p_align_p;
 
       /* An ELF segment (described by Elf_Internal_Phdr) may contain a
 	 number of sections with contents contributing to both p_filesz
@@ -5571,6 +5570,8 @@ assign_file_positions_for_load_sections (bfd *abfd,
       p = phdrs + m->idx;
       p->p_type = m->p_type;
       p->p_flags = m->p_flags;
+      p_align = bed->p_align;
+      p_align_p = false;
 
       if (m->count == 0)
 	p->p_vaddr = m->p_vaddr_offset * opb;

ld/testsuite/ld-elf/pr29435.d

@@ -0,0 +1,11 @@
+#ld: -shared -z separate-code -z relro
+#xfail: ![check_shared_lib_support]
+#xfail: ![check_relro_support]
+#readelf: -Wl
+
+#failif
+#...
+ +LOAD +0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ .* 0x8000
+#...
+ +LOAD +0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ .* 0x8000
+#...

ld/testsuite/ld-elf/pr29435.s

@@ -0,0 +1,6 @@
+        .text
+	.balign 0x8000
+	.globl	foo
+	.type	foo, %function
+foo:
+	.byte 0