hppa64: Use DW_EH_PE_aligned encoding on 64-bit HP-UX

In testing with GNU ld, I noticed that the HP-UX dynamic linker
doesn't support unaligned DW_EH_PE_absptr encodings.

2026-05-15  John David Anglin  <danglin@gcc.gnu.org>

gcc/ChangeLog:

	* config/pa/pa.h (ASM_PREFERRED_EH_DATA_FORMAT): Use
	DW_EH_PE_aligned encoding on 64-bit HP-UX.

diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h
index d9b8515bb49edcdca99cd67cd406adf4b060f56c..f62361f0d6921446fc66e5668909d6257c00f508 100644 (file)
--- a/gcc/config/pa/pa.h
+++ b/gcc/config/pa/pa.h
@@ -440,20 +440,21 @@ extern rtx hppa_pic_save_rtx (void);
    the SOM linker can do unaligned fixups for absolute pointers.
    We also need aligned pointers for global and function pointers.
 
-   Although the HP-UX 64-bit ELF linker can handle unaligned pc-relative
-   fixups, the runtime doesn't have a consistent relationship between
-   text and data for dynamically loaded objects.  Thus, it's not possible
-   to use pc-relative encoding for pointers on this target.  It may be
-   possible to use segment relative encodings but GAS doesn't currently
-   have a mechanism to generate these encodings.  For other targets, we
-   use pc-relative encoding for pointers.  If the pointer might require
-   dynamic relocation, we make it indirect.  */
+   The HP-UX 64-bit dynamic linker can't handle unaligned DW_EH_PE_absptr
+   encodings.  Although the HP-UX 64-bit ELF linker can handle unaligned
+   pc-relative encodings, the runtime doesn't have a consistent relationship
+   between text and data for dynamically loaded objects.  Thus, it's not
+   possible to use pc-relative encoding for pointers on this target.  It
+   may be possible to use segment relative encodings.
+   
+   For other targets, we use pc-relative encoding for pointers.  If the
+   pointer might require dynamic relocation, we make it indirect.  */
 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                      \
   (TARGET_GAS && !TARGET_HPUX                                          \
    ? (DW_EH_PE_pcrel                                                   \
       | ((GLOBAL) || (CODE) == 2 ? DW_EH_PE_indirect : 0)              \
       | (TARGET_64BIT ? DW_EH_PE_sdata8 : DW_EH_PE_sdata4))            \
-   : (!TARGET_GAS || (GLOBAL) || (CODE) == 2                           \
+   : (TARGET_64BIT || !TARGET_GAS || (GLOBAL) || (CODE) == 2           \
       ? DW_EH_PE_aligned : DW_EH_PE_absptr))
 
 /* Handle special EH pointer encodings.  Absolute, pc-relative, and