From: Jinyang He <hejinyang@loongson.cn>
To: Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>
Cc: Xi Ruoyao <xry111@xry111.site>,
Youling Tang <tangyouling@loongson.cn>,
loongarch@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/6] LoongArch: Rename handle_syscall to handle_sys
Date: Tue, 28 Feb 2023 16:02:52 +0800 [thread overview]
Message-ID: <20230228080257.28807-2-hejinyang@loongson.cn> (raw)
In-Reply-To: <20230228080257.28807-1-hejinyang@loongson.cn>
The original handle_sys() is a trampline for handler_syscall. Drop it
and rename handle_syscall to handle_sys for invoking it directly.
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
---
arch/loongarch/kernel/entry.S | 13 +++++++------
arch/loongarch/kernel/genex.S | 5 -----
2 files changed, 7 insertions(+), 11 deletions(-)
diff --git a/arch/loongarch/kernel/entry.S b/arch/loongarch/kernel/entry.S
index d737e3cf42d3..d6e9572eb279 100644
--- a/arch/loongarch/kernel/entry.S
+++ b/arch/loongarch/kernel/entry.S
@@ -18,9 +18,9 @@
.text
.cfi_sections .debug_frame
.align 5
-SYM_FUNC_START(handle_syscall)
+SYM_FUNC_START(handle_sys)
csrrd t0, PERCPU_BASE_KS
- la.pcrel t1, kernelsp
+ la_abs t1, kernelsp
add.d t1, t1, t0
move t2, sp
ld.d sp, t1, 0
@@ -62,12 +62,13 @@ SYM_FUNC_START(handle_syscall)
li.d tp, ~_THREAD_MASK
and tp, tp, sp
- move a0, sp
- bl do_syscall
+ move a0, sp
+ la_abs ra, do_syscall
+ jirl ra, ra, 0
RESTORE_ALL_AND_RET
-SYM_FUNC_END(handle_syscall)
-_ASM_NOKPROBE(handle_syscall)
+SYM_FUNC_END(handle_sys)
+_ASM_NOKPROBE(handle_sys)
SYM_CODE_START(ret_from_fork)
bl schedule_tail # a0 = struct task_struct *prev
diff --git a/arch/loongarch/kernel/genex.S b/arch/loongarch/kernel/genex.S
index 44ff1ff64260..1af169ca3734 100644
--- a/arch/loongarch/kernel/genex.S
+++ b/arch/loongarch/kernel/genex.S
@@ -91,8 +91,3 @@ SYM_FUNC_END(except_vec_cex)
BUILD_HANDLER ri ri none
BUILD_HANDLER watch watch none
BUILD_HANDLER reserved reserved none /* others */
-
-SYM_FUNC_START(handle_sys)
- la_abs t0, handle_syscall
- jr t0
-SYM_FUNC_END(handle_sys)
--
2.34.3
next prev parent reply other threads:[~2023-02-28 8:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-28 8:02 [PATCH v2 0/6] Drop the per-node-mode exception handlers Jinyang He
2023-02-28 8:02 ` Jinyang He [this message]
2023-02-28 8:02 ` [PATCH v2 2/6] LoongArch: Move the content defined by SYM_DATA to data or rodata section Jinyang He
2023-02-28 8:02 ` [PATCH v2 3/6] LoongArch: Create a exception handlers section Jinyang He
2023-02-28 12:42 ` Youling Tang
2023-02-28 8:02 ` [PATCH v2 4/6] LoongArch: Drop pernode exception handlers Jinyang He
2023-02-28 12:42 ` Youling Tang
2023-02-28 8:02 ` [PATCH v2 5/6] LoongArch: Fix up the prologue unwinder unwind exception frame Jinyang He
2023-02-28 8:02 ` [PATCH v2 6/6] LoongArch: Clean up la_abs macro Jinyang He
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