From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
anup.patel@wdc.com, gregkh@linuxfoundation.org,
liush@allwinnertech.com, wefu@redhat.com, drew@beagleboard.org,
wangjunqiang@iscas.ac.cn, hch@infradead.org
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-csky@vger.kernel.org, linux-s390@vger.kernel.org,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
inux-parisc@vger.kernel.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH V2 16/17] riscv: compat: Add UXL_32 support in start_thread
Date: Tue, 28 Dec 2021 22:39:57 +0800 [thread overview]
Message-ID: <20211228143958.3409187-17-guoren@kernel.org> (raw)
In-Reply-To: <20211228143958.3409187-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
If the current task is in COMPAT mode, set SR_UXL_32 in status for
returning userspace.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
---
arch/riscv/kernel/process.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 03ac3aa611f5..1a666ad299b4 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -97,6 +97,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc,
}
regs->epc = pc;
regs->sp = sp;
+
+#ifdef CONFIG_COMPAT
+ if (is_compat_task())
+ regs->status |= SR_UXL_32;
+#endif
}
void flush_thread(void)
--
2.25.1
next prev parent reply other threads:[~2021-12-28 14:41 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-28 14:39 [PATCH V2 00/17] riscv: compat: Add COMPAT mode support for rv64 guoren
2021-12-28 14:39 ` [PATCH V2 01/17] kconfig: Add SYSVIPC_COMPAT for all architectures guoren
2022-01-10 11:43 ` Arnd Bergmann
2021-12-28 14:39 ` [PATCH V2 02/17] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT guoren
2022-01-10 11:44 ` Arnd Bergmann
2021-12-28 14:39 ` [PATCH V2 03/17] asm-generic: fcntl: compat: Remove duplicate definitions guoren
2022-01-10 13:35 ` Arnd Bergmann
2022-01-10 16:30 ` Christoph Hellwig
2022-01-11 2:43 ` Guo Ren
2022-01-10 15:56 ` Christophe Leroy
2021-12-28 14:39 ` [PATCH V2 04/17] asm-generic: compat: Cleanup " guoren
2021-12-28 14:39 ` [PATCH V2 05/17] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT guoren
2021-12-28 14:39 ` [PATCH V2 06/17] riscv: Fixup difference with defconfig guoren
2021-12-28 14:39 ` [PATCH V2 07/17] riscv: compat: Add basic compat date type implementation guoren
2021-12-28 14:39 ` [PATCH V2 08/17] riscv: compat: Re-implement TASK_SIZE for COMPAT_32BIT guoren
2021-12-28 14:39 ` [PATCH V2 09/17] riscv: compat: syscall: Add compat_sys_call_table implementation guoren
2021-12-28 14:39 ` [PATCH V2 10/17] riscv: compat: syscall: Add entry.S implementation guoren
2021-12-28 14:39 ` [PATCH V2 11/17] riscv: compat: Add elf.h implementation guoren
2022-01-10 14:28 ` Arnd Bergmann
2022-01-11 2:42 ` Guo Ren
2021-12-28 14:39 ` [PATCH V2 12/17] riscv: compat: vdso: Add rv32 VDSO base code implementation guoren
2021-12-28 14:39 ` [PATCH V2 13/17] riscv: compat: vdso: Add setup additional pages implementation guoren
2021-12-28 14:39 ` [PATCH V2 14/17] riscv: compat: signal: Add rt_frame implementation guoren
2021-12-28 14:39 ` [PATCH V2 15/17] riscv: compat: ptrace: Add compat_arch_ptrace implement guoren
2021-12-28 14:39 ` guoren [this message]
2021-12-28 14:39 ` [PATCH V2 17/17] riscv: compat: Add COMPAT Kbuild skeletal support guoren
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