From: Xi Ruoyao <xry111@xry111.site>
To: loongarch@lists.linux.dev
Cc: linux-kernel@vger.kernel.org, WANG Xuerui <kernel@xen0n.name>,
Huacai Chen <chenhuacai@kernel.org>
Subject: [PATCH 4/5] LoongArch: Stop using undocumented assembler options
Date: Thu, 28 Jul 2022 00:29:38 +0800 [thread overview]
Message-ID: <4f09c81c22d0a16883a6914a8f7209957386c07c.camel@xry111.site> (raw)
In-Reply-To: <385f63bcbee8e37c42f479ce9cdc7e7d731d419b.camel@xry111.site>
Now we can handle GOT and GOT-based relocations properly, remove the
undocumented `-Wa,-mla-{global,local}-with-{pcrel,abs}` assembler hacks.
Adjust assembly code to explicitly use "la.pcrel" where necessary.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
---
arch/loongarch/Makefile | 5 +----
arch/loongarch/kernel/head.S | 10 +++++-----
2 files changed, 6 insertions(+), 9 deletions(-)
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
index 039dcc4fe1f3..9552c7880d34 100644
--- a/arch/loongarch/Makefile
+++ b/arch/loongarch/Makefile
@@ -40,10 +40,7 @@ endif
cflags-y += -G0 -pipe -msoft-float
LDFLAGS_vmlinux += -G0 -static -n -nostdlib
-KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
-KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
-KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs
-KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
+KBUILD_CFLAGS_MODULE += -fplt
cflags-y += -ffreestanding
cflags-y += $(call cc-option, -mno-check-zero-division)
diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index 74ea7bf6c8d6..193329ed6e8c 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -60,17 +60,17 @@ SYM_CODE_START(kernel_entry) # kernel entry point
la.abs t0, 0f
jirl zero, t0, 0
0:
- la t0, __bss_start # clear .bss
+ la.pcrel t0, __bss_start # clear .bss
st.d zero, t0, 0
- la t1, __bss_stop - LONGSIZE
+ la.pcrel t1, __bss_stop - LONGSIZE
1:
addi.d t0, t0, LONGSIZE
st.d zero, t0, 0
bne t0, t1, 1b
- la t0, fw_arg0
+ la.pcrel t0, fw_arg0
st.d a0, t0, 0 # firmware arguments
- la t0, fw_arg1
+ la.pcrel t0, fw_arg1
st.d a1, t0, 0
/* KSave3 used for percpu base, initialized as 0 */
@@ -78,7 +78,7 @@ SYM_CODE_START(kernel_entry) # kernel entry point
/* GPR21 used for percpu base (runtime), initialized as 0 */
or u0, zero, zero
- la tp, init_thread_union
+ la.pcrel tp, init_thread_union
/* Set the SP after an empty pt_regs. */
PTR_LI sp, (_THREAD_SIZE - 32 - PT_SIZE)
PTR_ADD sp, sp, tp
--
2.37.0
next prev parent reply other threads:[~2022-07-27 16:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-27 16:24 [PATCH 0/5] LoongArch: Support new relocation types Xi Ruoyao
2022-07-27 16:26 ` [PATCH 1/5] LoongArch: Add section of GOT for kernel module Xi Ruoyao
[not found] ` <849f514e-f78a-72a2-b94e-6974074b75eb@loongson.cn>
2022-07-28 9:02 ` Xi Ruoyao
2022-07-28 9:21 ` Youling Tang
2022-07-28 10:53 ` Xi Ruoyao
2022-07-27 16:27 ` [PATCH 2/5] LoongArch: Support R_LARCH_SOP_PUSH_GPREL relocation type in " Xi Ruoyao
2022-07-27 16:28 ` [PATCH 3/5] LoongArch: Support relocation against _GLOBAL_OFFSET_TABLE_ Xi Ruoyao
2022-07-28 1:02 ` Jinyang He
2022-07-28 6:41 ` Xi Ruoyao
2022-07-28 9:14 ` Jinyang He
2022-07-28 10:57 ` Xi Ruoyao
2022-07-28 11:21 ` Jinyang He
2022-07-27 16:29 ` Xi Ruoyao [this message]
2022-07-28 9:46 ` [PATCH 4/5] LoongArch: Stop using undocumented assembler options Youling Tang
2022-07-28 10:58 ` Xi Ruoyao
2022-07-27 16:31 ` [PATCH 5/5] LoongArch: Support modules with new relocation types Xi Ruoyao
2022-07-27 16:46 ` [PATCH 0/5] LoongArch: Support " Xi Ruoyao
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