[PATCH] H8: Add support for preinit/init/fini array

[Jeff Johnston]

The changes to fini.c and init.c have been reverted.

-- Jeff J.

On Tue, Aug 11, 2026 at 10:54 PM Hans-Peter Nilsson <hp@axis.com> wrote:

> > From: Jan Dubiec <jdx@o2.pl>
> > Date: Sun, 12 Jul 2026 21:54:53 +0200
>
> > This patch adds support for .preinit_array, .init_array, and .fini_array
> > for the H8 family when binutils and GCC are configured with
> "--enable-initfini-array".
>
> To accomplish that, there should have been a fix to binutils, per
> below.
>
> Instead, this patch broke initfini support for targets with a
> USER_LABEL_PREFIX, like cris-elf.  I was alerted to this commit when
> people tried to use newlib master with cris-elf in
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126518
>
> > The changes to init.c and fini.c ensure that linker-defined symbols
> > referenced from C code are not affected by target-specific symbol naming
> > conventions. For example, GCC for H8 prefixes external symbol names with
> > an underscore, whereas GCC for ARM does not. The asm keyword is used to
> > associate C identifiers with the corresponding linker-defined symbol
> names
> > in a target-independent manner.
> >
> > The patch has been tested on H8 wher it enables support for the
> > initialization and finalization arrays and on ARM in order to verify that
> > the changes do not introduce any regressions.
>
> Since ARM isn't a USER_LABEL_PREFIX-target, your patch was neutral
> there.  While testing the patch there too makes sense, that target
> wasn't in the cross-hairs; it didn't change the symbols.
>
> The parts of this patch to the generic files, should be reverted.
> Instead I suggest to correct binutils for h8300 to emit the "_" as a
> prefix to those linker-generated initfini-symbols in the default
> linker scripts, something like:
>
> diff --git a/ld/emulparams/h8300elf.sh b/ld/emulparams/h8300elf.sh
> index 45b3458d1cea..dd007fcd0ffc 100644
> --- a/ld/emulparams/h8300elf.sh
> +++ b/ld/emulparams/h8300elf.sh
> @@ -9,6 +9,7 @@ MAXPAGESIZE=2
>  TARGET_PAGE_SIZE=128
>  ARCH=h8300
>  TEMPLATE_NAME=elf
> +USER_LABEL_PREFIX=_
>  EMBEDDED=yes
>  STACK_ADDR=0xfefc
>  TINY_READONLY_SECTION=".tinyrodata :
>
> (cf. emulparams/criself.sh and ld/scripttempl/elf.sc)
>
> That might of course have fallout for other symbols defined in those
> scripts, but would align with other targets (no special defines or
> asm-renames needed).
>
> brgds, H-P
>
>
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