From: Philippe Mathieu-Daudé Date: Mon, 6 Oct 2025 15:36:31 +0000 (+0200) Subject: linux-user/microblaze: Fix little-endianness binary X-Git-Tag: v10.2.0-rc1~61^2~1 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=91fc6d8101de97c588e0a4263cf4f6148b3e702a;p=thirdparty%2Fqemu.git linux-user/microblaze: Fix little-endianness binary MicroBlaze CPU model has a "little-endian" property, pointing to the @endi internal field. Commit c36ec3a9655 ("hw/microblaze: Explicit CPU endianness") took care of having all MicroBlaze boards with an explicit default endianness, so later commit 415aae543ed ("target/microblaze: Consider endianness while translating code") could infer the endianness at runtime from the @endi field, and not a compile time via the TARGET_BIG_ENDIAN definition. Doing so, we forgot to make the endianness explicit on user emulation, so there all CPUs are started with the default "little-endian=off" value, leading to breaking support for little endian binaries: $ readelf -h ./hello-world-mbel ELF Header: Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 Class: ELF32 Data: 2's complement, little endian $ qemu-microblazeel ./hello-world-mbel qemu: uncaught target signal 11 (Segmentation fault) - core dumped Segmentation fault (core dumped) Fix by restoring the previous behavior of starting with the builtin endianness of the binary: $ qemu-microblazeel ./hello-world-mbel Hello World Cc: qemu-stable@nongnu.org Fixes: 415aae543ed ("target/microblaze: Consider endianness while translating code") Reported-by: Edgar E. Iglesias Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Edgar E. Iglesias Message-Id: <20251006173350.17455-1-philmd@linaro.org> --- diff --git a/linux-user/microblaze/elfload.c b/linux-user/microblaze/elfload.c index 7eb1b26d17..bdc0a953d5 100644 --- a/linux-user/microblaze/elfload.c +++ b/linux-user/microblaze/elfload.c @@ -8,7 +8,8 @@ const char *get_elf_cpu_model(uint32_t eflags) { - return "any"; + return TARGET_BIG_ENDIAN ? "any,little-endian=off" + : "any,little-endian=on"; } void elf_core_copy_regs(target_elf_gregset_t *r, const CPUMBState *env)