linux-kernel - [RFC PATCH V3 25/43] rv64ilp32_abi: exec: Adapt 64lp64 env and argv

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Message-Id: <20250325121624.523258-26-guoren@kernel.org>
Date: Tue, 25 Mar 2025 08:16:06 -0400
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Subject: [RFC PATCH V3 25/43] rv64ilp32_abi: exec: Adapt 64lp64 env and argv

From: "Guo Ren (Alibaba DAMO Academy)" <guoren@...nel.org>

The rv64ilp32 abi reuses the env and argv memory layout of the
lp64 abi, so leave the space to fit the lp64 struct layout.

Signed-off-by: Guo Ren (Alibaba DAMO Academy) <guoren@...nel.org>
---
 fs/exec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/exec.c b/fs/exec.c
index 506cd411f4ac..548d18b7ae92 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -424,6 +424,10 @@ static const char __user *get_user_arg_ptr(struct user_arg_ptr argv, int nr)
 	}
 #endif
 
+#if defined(CONFIG_64BIT) && (BITS_PER_LONG == 32)
+	nr = nr * 2;
+#endif
+
 	if (get_user(native, argv.ptr.native + nr))
 		return ERR_PTR(-EFAULT);
 
-- 
2.40.1