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[Qemu-devel] [Bug 842290] [NEW] MIPS Malta mini-bootloader print functio


From: Andrew Drake
Subject: [Qemu-devel] [Bug 842290] [NEW] MIPS Malta mini-bootloader print function has bad jump instruction
Date: Tue, 06 Sep 2011 02:44:43 -0000

Public bug reported:

One of the hardcoded bootloader library instructions in the MIPS Malta
mini-bootloader's print function is:

stl_raw(p++, 0x08000205);                                     /* j 814
*/

Since this function is loaded at 0xbfc00808, this jump jumps to the
middle of nowhere. The properly-encoded instruction is:

stl_raw(p++, 0x0bf00205);                                     /* j 814
*/

With this patch, the print function behaves as expected.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/842290

Title:
  MIPS Malta mini-bootloader print function has bad jump instruction

Status in QEMU:
  New

Bug description:
  One of the hardcoded bootloader library instructions in the MIPS Malta
  mini-bootloader's print function is:

  stl_raw(p++, 0x08000205);                                     /* j 814
  */

  Since this function is loaded at 0xbfc00808, this jump jumps to the
  middle of nowhere. The properly-encoded instruction is:

  stl_raw(p++, 0x0bf00205);                                     /* j 814
  */

  With this patch, the print function behaves as expected.

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