commit 55baec0f4c535e24a060070592b8c51d75108481
author Richard Henderson <richard.henderson@linaro.org> Fri Jul 07 21:40:41 2023 +0100
committer Richard Henderson <richard.henderson@linaro.org> Sat Jul 15 08:02:32 2023 +0100
tree 6a807cbafc3928642e00e1d0c5ea1faa0d23cb17
parent 0dd558121c41dd4578517a90668c24e7fcdd46ba

linux-user: Widen target_mmap offset argument to off_t

We build with _FILE_OFFSET_BITS=64, so off_t = off64_t = uint64_t.
With an extra cast, this fixes emulation of mmap2, which could
overflow the computation of the full value of offset.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230707204054.8792-14-richard.henderson@linaro.org>

linux-user/user-mmap.h

diff --git a/linux-user/user-mmap.h b/linux-user/user-mmap.h
index 480ce1c..3fc986f 100644
--- a/linux-user/user-mmap.h
+++ b/linux-user/user-mmap.h
@@ -20,7 +20,7 @@
 
 int target_mprotect(abi_ulong start, abi_ulong len, int prot);
 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
-                     int flags, int fd, abi_ulong offset);
+                     int flags, int fd, off_t offset);
 int target_munmap(abi_ulong start, abi_ulong len);
 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
                        abi_ulong new_size, unsigned long flags,