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-id = 982
-title = "linux-user: --strace incorrectly decodes writev arguments for 64-bit binaries on 32-bit machine"
-state = "opened"
-created_at = "2022-04-13T13:14:05.485Z"
-closed_at = "n/a"
-labels = ["linux-user"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/982"
-host-os = "Gentoo"
-host-arch = "i686"
-qemu-version = "6.2.0"
-guest-os = "linux-user"
-guest-arch = "x86_64, aarch64"
-description = """With `--strace`, the arguments to `writev` appear to be decoded incorrectly.
-The syscall still succeeds and has the expected effects."""
-reproduce = """```
-$ cat main.c
-#include <sys/uio.h>
-
-int main(void) {
-  struct iovec iov;
-  iov.iov_base = "hello, world!\\n";
-  iov.iov_len = 14;
-  return writev(1, &iov, 1);
-}
-
-$ aarch64-unknown-linux-gnu-gcc -static -o aarch64-main main.c
-
-$ x86_64-pc-linux-gnu-gcc -static -o x86_64-main main.c
-
-$ i686-pc-linux-gnu-gcc -static -o i686-main main.c
-
-$ ./i686-main
-hello, world!
-
-$ strace ./i686-main |& grep writev
-writev(1, [{iov_base="hello, world!\\n", iov_len=14}], 1hello, world!
-
-$ qemu-i386 --strace ./i686-main |& grep writev
-21953 writev(1,0x407ffe54,0x1) = 14
-
-$ qemu-x86_64 --strace ./x86_64-main |& grep writev
-22218 writev(1,(nil),0x407ffcc0) = 14
-
-$ qemu-aarch64 --strace ./aarch64-main |& grep writev
-22523 writev(1,(nil),0x407ffcc8) = 14
-```"""
-additional = "n/a"