vbatts/grub
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Zero %ebp and %edi when entering Linux's 32-bit entry point, as

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required by the boot protocol.
* include/grub/i386/relocator.h (struct grub_relocator32_state): Add
ebp and edi members.
* grub-core/lib/i386/relocator.c (grub_relocator_boot): Handle
state.ebp and state.edi.
* grub-core/lib/i386/relocator32.S (grub_relocator32_start): Set
%ebp and %edi according to grub_relocator32_ebp and
grub_relocator32_edi respectively.
* grub-core/loader/i386/linux.c (grub_linux_boot): Zero state.ebp
and state.edi.
This commit is contained in:
Colin Watson 2010-09-02 22:36:09 +01:00
parent 529cc99acf
commit 9056cbf38e
5 changed files with 37 additions and 2 deletions
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2
grub-core/loader/i386/linux.c
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@ -716,7 +716,7 @@ grub_linux_boot (void)
/* FIXME. */
/* asm volatile ("lidt %0" : : "m" (idt_desc)); */
state.ebx = 0;
state.ebp = state.edi = state.ebx = 0;
state.esi = real_mode_target;
state.esp = real_mode_target;
state.eip = params->code32_start;