hw/core/loader: Make load_elf_hdr() return bool, simplify caller

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20251119130855.105479-2-armbru@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

hw/arm/boot.c

@@ -766,16 +766,12 @@ static ssize_t arm_load_elf(struct arm_boot_info *info, uint64_t *pentry,
     int data_swab = 0;
     int elf_data_order;
     ssize_t ret;
-    Error *err = NULL;
-
 
-    load_elf_hdr(info->kernel_filename, &elf_header, &elf_is64, &err);
-    if (err) {
+    if (!load_elf_hdr(info->kernel_filename, &elf_header, &elf_is64, NULL)) {
         /*
          * If the file is not an ELF file we silently return.
          * The caller will fall back to try other formats.
          */
-        error_free(err);
         return -1;
     }
 

hw/core/loader.c

@@ -364,8 +364,9 @@ const char *load_elf_strerror(ssize_t error)
     }
 }
 
-void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp)
+bool load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp)
 {
+    bool ok = false;
     int fd;
     uint8_t e_ident_local[EI_NIDENT];
     uint8_t *e_ident;
@@ -380,7 +381,7 @@ void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp)
     fd = open(filename, O_RDONLY | O_BINARY);
     if (fd < 0) {
         error_setg_errno(errp, errno, "Failed to open file: %s", filename);
-        return;
+        return false;
     }
     if (read(fd, hdr, EI_NIDENT) != EI_NIDENT) {
         error_setg_errno(errp, errno, "Failed to read file: %s", filename);
@@ -415,8 +416,11 @@ void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp)
         off += br;
     }
 
+    ok = true;
+
 fail:
     close(fd);
+    return ok;
 }
 
 /* return < 0 if error, otherwise the number of bytes loaded in memory */

hw/riscv/spike.c

@@ -180,15 +180,7 @@ static void create_fdt(SpikeState *s, const MemMapEntry *memmap,
 
 static bool spike_test_elf_image(char *filename)
 {
-    Error *err = NULL;
-
-    load_elf_hdr(filename, NULL, NULL, &err);
-    if (err) {
-        error_free(err);
-        return false;
-    } else {
-        return true;
-    }
+    return load_elf_hdr(filename, NULL, NULL, NULL);
 }
 
 static void spike_board_init(MachineState *machine)

include/hw/core/loader.h

@@ -188,8 +188,10 @@ ssize_t load_elf(const char *filename,
  *
  * Inspect an ELF file's header. Read its full header contents into a
  * buffer and/or determine if the ELF is 64bit.
+ *
+ * Returns true on success, false on failure.
  */
-void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp);
+bool load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp);
 
 ssize_t load_aout(const char *filename, hwaddr addr, int max_sz,
                   bool big_endian, hwaddr target_page_size);