multiboot: set bootloader name

Author: fabianfreyer

loader.c

@@ -137,6 +137,11 @@ loader_main(struct loader_callbacks *cb, void *arg, int version, int ndisks)
             ERROR(EINVAL, "Could not set kernel command line");
             goto error;
         }
+
+        if (multiboot_info_set_loader_name(&mb->info, BOOTLOADER_NAME)) {
+            ERROR(EINVAL, "Could not set bootloader name");
+            goto error;
+        }
     }
 
     /* Cleanup. */

loader.h

@@ -34,6 +34,8 @@
 #define USERBOOT_VERSION 4
 #define MALLOCSZ	(64*1024*1024)
 
+#define BOOTLOADER_NAME "bhyve-multiboot.so"
+
 enum LOAD_TYPE {
 	LOAD_ELF = 1,
 	LOAD_AOUT = 2,

multiboot.c

@@ -52,6 +52,22 @@ multiboot_info_set_meminfo(struct multiboot_info* info,
     return 0;
 }
 
+uint32_t
+multiboot_info_set_loader_name(struct multiboot_info* info, const char* name)
+{
+    uint32_t error = 0;
+    size_t length = strlen(name);
+    void* p_addr = allocate(length+1);
+
+    if (!p_addr)
+        return ENOMEM;
+
+    error = CALLBACK(copyin, name, p_addr, length+1);
+    info->boot_loader_name = p_addr;
+    info->flags |= MULTIBOOT_BOOTLOADER_NAME;
+    return error;
+}
+
 uint32_t
 multiboot_info_set_cmdline(struct multiboot_info* info, const char* cmdline)
 {

multiboot.h

@@ -233,6 +233,16 @@ uint32_t
 multiboot_info_set_meminfo(struct multiboot_info* info,
                            uint32_t mem_lower, uint32_t mem_upper);
 
+/**
+ * @brief Set multiboot info bootloader name
+ *
+ * @param info pointer to the multiboot_info struct
+ * @param name bootloader name to set
+ * @return uint32_t 0 on success, error code on failure
+ */
+uint32_t
+multiboot_info_set_loader_name(struct multiboot_info* info, const char* name);
+
 /**
  * @brief Set multiboot info command line
  *