[PULL 24/25] hw/arm/boot: Explain why load_elf_hdr() error is ignored

[Peter Maydell]

From: Philippe Mathieu-Daudé <philmd@linaro.org>

If the file is not an ELF file, arm_setup_direct_kernel_boot()
falls back to try it as a uimage or an AArch64 Image file or as
last resort a bare raw binary. We can discard load_elf_hdr()
error and silently return.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240903144154.17135-1-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/boot.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 6c895e05cbc..5301d8d318c 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -799,14 +799,18 @@ static ssize_t arm_load_elf(struct arm_boot_info *info, 
uint64_t *pentry,
     } elf_header;
     int data_swab = 0;
     bool big_endian;
-    ssize_t ret = -1;
+    ssize_t ret;
     Error *err = NULL;
 
 
     load_elf_hdr(info->kernel_filename, &elf_header, &elf_is64, &err);
     if (err) {
+        /*
+         * If the file is not an ELF file we silently return.
+         * The caller will fall back to try other formats.
+         */
         error_free(err);
-        return ret;
+        return -1;
     }
 
     if (elf_is64) {
-- 
2.34.1