Patchwork [19/60] fix entry pointer for ELF kernels loaded with -kernel option

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Submitter Michael Tokarev
Date Feb. 4, 2013, 10:40 a.m.
Message ID <1359974470-17044-20-git-send-email-mjt@msgid.tls.msk.ru>
Download mbox | patch
Permalink /patch/217879/
State New
Headers show

Comments

Michael Tokarev - Feb. 4, 2013, 10:40 a.m.
From: Henning Schild <henning@hennsch.de>

 Find a hopefully proper patch attached. Take it or leave it.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Henning Schild <henning@hennsch.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
(cherry picked from commit 7e9c7ffe9fd9dfc3d0168dd584936db8144b230b)

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 hw/elf_ops.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

Patch

diff --git a/hw/elf_ops.h b/hw/elf_ops.h
index fa65ce2..731a983 100644
--- a/hw/elf_ops.h
+++ b/hw/elf_ops.h
@@ -269,6 +269,17 @@  static int glue(load_elf, SZ)(const char *name, int fd,
                 addr = ph->p_paddr;
             }
 
+            /* the entry pointer in the ELF header is a virtual
+             * address, if the text segments paddr and vaddr differ
+             * we need to adjust the entry */
+            if (pentry && !translate_fn &&
+                    ph->p_vaddr != ph->p_paddr &&
+                    ehdr.e_entry >= ph->p_vaddr &&
+                    ehdr.e_entry < ph->p_vaddr + ph->p_filesz &&
+                    ph->p_flags & PF_X) {
+                *pentry = ehdr.e_entry - ph->p_vaddr + ph->p_paddr;
+            }
+
             snprintf(label, sizeof(label), "phdr #%d: %s", i, name);
             rom_add_blob_fixed(label, data, mem_size, addr);