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From: Richard Sandiford <richard.sandiford@arm.com>
To: Andrew Pinski via Gcc-patches <gcc-patches@gcc.gnu.org>
Mail-Followup-To: Andrew Pinski via Gcc-patches <gcc-patches@gcc.gnu.org>,Andrew Pinski <apinski@marvell.com>, richard.sandiford@arm.com
Cc: Andrew Pinski <apinski@marvell.com>
Subject: Re: [PATCH 2/2] AARCH64: Turn off unwind tables for crtbeginT.o
References: <20230723010645.1622083-1-apinski@marvell.com>
	<20230723010645.1622083-2-apinski@marvell.com>
Date: Mon, 24 Jul 2023 16:55:06 +0100
In-Reply-To: <20230723010645.1622083-2-apinski@marvell.com> (Andrew Pinski via
	Gcc-patches's message of "Sat, 22 Jul 2023 18:06:45 -0700")
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Andrew Pinski via Gcc-patches <gcc-patches@gcc.gnu.org> writes:
> The problem -fasynchronous-unwind-tables is on by default for aarch64
> We need turn it off for crt*.o because it would make __EH_FRAME_BEGIN__ point
> to .eh_frame data from crtbeginT.o instead of the user-defined object
> during static linking.

Could you go into more details?  Which user-defined object do you mean?

I notice alpha has:

    # When GAS-generated unwind tables are created, they get created
    # after the __FRAME_END__ terminator, which causes an ld error.
    CRTSTUFF_T_CFLAGS = -fno-unwind-tables

which I guess was a separate problem.

Thanks,
Richard