[Bug dynamic-link/28676] New: p_align on PT_LOAD segment in DSO isn't honored

["hjl.tools at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28676

            Bug ID: 28676
           Summary: p_align on PT_LOAD segment in DSO isn't honored
           Product: glibc
           Version: 2.35
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

Created attachment 13838
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13838&action=edit
A testcase

[hjl@gnu-cfl-2 aligned-1]$ make 
gcc -pie -fPIE -Wl,-z,max-page-size=0x200000 -O2 -o pie main.c load.c
gcc -no-pie -Wl,-z,max-page-size=0x200000 -O2 -o pde main.c load.c
gcc -O2 -fPIC   -c -o load.o load.c
gcc -shared -Wl,-z,max-page-size=0x200000 -o libload.so load.o
gcc -no-pie -Wl,-z,max-page-size=0x200000 -O2 -o dso main.c libload.so -Wl,-R,.
./pde
foo: 0xe00000
./pie
foo: 0x55ea36a00000
./dso
foo: 0x7fafe6308000
make: *** [Makefile:8: all] Aborted (core dumped)
[hjl@gnu-cfl-2 aligned-1]$ 

Kernel loader honors 2MB p_align in PIE.  But ld.so doesn't honor 2MB p_align
in DSO.

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