From: Nathan Chancellor <nathan@kernel.org>
To: mpe@ellerman.id.au
Cc: npiggin@gmail.com, christophe.leroy@csgroup.eu,
erhard_f@mailbox.org, nathan@kernel.org,
ndesaulniers@google.com, trix@redhat.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev, patches@lists.linux.dev
Subject: [PATCH 1/3] powerpc/boot: Only use '-mabi=elfv2' with CONFIG_PPC64_BOOT_WRAPPER
Date: Wed, 15 Feb 2023 11:41:15 -0700 [thread overview]
Message-ID: <20230118-ppc64-elfv2-llvm-v1-1-b9e2ec9da11d@kernel.org> (raw)
In-Reply-To: <20230118-ppc64-elfv2-llvm-v1-0-b9e2ec9da11d@kernel.org>
When CONFIG_PPC64_ELF_ABI_V2 is enabled with clang through
CONFIG_PPC64_BIG_ENDIAN_ELF_ABI_V2, building the powerpc boot wrapper
in 32-bit mode (i.e. with CONFIG_PPC64_BOOT_WRAPPER=n) fails with:
error: unknown target ABI 'elfv2'
The ABI cannot be changed with '-m32'; GCC silently accepts it but clang
errors out. Only provide '-mabi=elfv2' when CONFIG_PPC64_BOOT_WRAPPER is
enabled, which is the only way '-mabi=elfv2' will be useful.
Tested-by: "Erhard F." <erhard_f@mailbox.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
arch/powerpc/boot/Makefile | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index d32d95aea5d6..0d4a8e8bdcab 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -44,6 +44,9 @@ BOOTCFLAGS += -m64 -mcpu=powerpc64le
else
BOOTCFLAGS += -m64 -mcpu=powerpc64
endif
+ifdef CONFIG_PPC64_ELF_ABI_V2
+BOOTCFLAGS += $(call cc-option,-mabi=elfv2)
+endif
else
BOOTCFLAGS += -m32 -mcpu=powerpc
endif
@@ -55,9 +58,6 @@ BOOTCFLAGS += -mbig-endian
else
BOOTCFLAGS += -mlittle-endian
endif
-ifdef CONFIG_PPC64_ELF_ABI_V2
-BOOTCFLAGS += $(call cc-option,-mabi=elfv2)
-endif
BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -nostdinc
--
2.39.2
next prev parent reply other threads:[~2023-02-15 18:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-15 18:41 [PATCH 0/3] Allow CONFIG_PPC64_BIG_ENDIAN_ELF_ABI_V2 with ld.lld 15+ Nathan Chancellor
2023-02-15 18:41 ` Nathan Chancellor [this message]
2023-02-15 18:41 ` [PATCH 2/3] powerpc: Fix use of '-mabi=elfv2' with clang Nathan Chancellor
2023-02-15 18:41 ` [PATCH 3/3] powerpc: Allow CONFIG_PPC64_BIG_ENDIAN_ELF_ABI_V2 with ld.lld 15+ Nathan Chancellor
2023-02-20 6:11 ` [PATCH 0/3] " Michael Ellerman
2023-02-20 15:51 ` Nathan Chancellor
2023-03-22 12:25 ` Michael Ellerman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230118-ppc64-elfv2-llvm-v1-1-b9e2ec9da11d@kernel.org \
--to=nathan@kernel.org \
--cc=christophe.leroy@csgroup.eu \
--cc=erhard_f@mailbox.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=llvm@lists.linux.dev \
--cc=mpe@ellerman.id.au \
--cc=ndesaulniers@google.com \
--cc=npiggin@gmail.com \
--cc=patches@lists.linux.dev \
--cc=trix@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).