aarch64: enlarge memory range for grub loading

For now, 0x40400000 ~ 0x40480000 is used for loading grub. But it may not be enough sometime. Enlarge this area by movnge the ram_min to 0x40600000. Thus there is 2M range for loading grub that is enough. As PE loader will get image offset and size in the header to put it in the right place, image header should also be updated. Fixes: #261 Signed-off-by: Jianyong Wu <[email protected]>
cloud-hypervisor · Jul 6, 2023 · 6735c61 · 6735c61
1 parent 180d1bd
commit 6735c61
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Showing 3 changed files with 13 additions and 4 deletions.
diff --git a/aarch64-unknown-none.ld b/aarch64-unknown-none.ld
@@ -6,7 +6,7 @@ ENTRY(ram64_start)
     ACPI:   [0x4020_0000-0x403f_ffff)
     kernel: [0x4048_0000-]
    The stack start is at the end of the DRAM region. */
-ram_min = 0x40480000;
+ram_min = 0x40600000;
 
 SECTIONS
 {

diff --git a/src/arch/aarch64/ram64.s b/src/arch/aarch64/ram64.s
@@ -14,8 +14,8 @@ ram64_start:
   add x13, x18, #0x16   /* code0: UEFI "MZ" signature magic instruction */
   b jump_to_rust        /* code1 */
 
-  .quad 0               /* text_offset */
-  .quad 0               /* image_size */
+  .quad 0x200000        /* text_offset */
+  .quad 0x8000          /* image_size */
   .quad 0               /* flags */
   .quad 0               /* res2 */
   .quad 0               /* res3 */
@@ -34,4 +34,4 @@ jump_to_rust:
   mov sp, x30
 
   /* x0: pointer to device tree */
-  b rust64_start
+  b rust64_start
diff --git a/src/main.rs b/src/main.rs
@@ -16,6 +16,9 @@ use core::panic::PanicInfo;
 #[cfg(target_arch = "x86_64")]
 use x86_64::instructions::hlt;
 
+#[cfg(target_arch = "aarch64")]
+use crate::arch::aarch64::layout::code_range;
+
 #[macro_use]
 mod serial;
 
@@ -132,6 +135,12 @@ fn boot_from_device(device: &mut block::VirtioBlockDevice, info: &dyn bootinfo::
         }
     };
 
+    #[cfg(target_arch = "aarch64")]
+    if code_range().start < (info.kernel_load_addr() + size) as usize {
+        log!("error: Boot Image is too large!");
+        return false;
+    }
+
     log!("Executable loaded");
     efi::efi_exec(entry_addr, load_addr, size, info, &f, device);
     true