Huang, Ying wrote:
This patch documents the 32-bit boot protocol of x86. It has been used
by Kexec and LinuxBIOS. This patch is based on the proposal of Peter
Anvin.
+At entry, the CPU must be in 32-bit protected mode with paging
+disabled; a GDT must be loaded with the descriptors for selectors
+__BOOT_CS(0x10) and __BOOT_DS(0x18); both descriptors must be 4G flat
+segment; __BOOS_CS must have execute/read permission, and __BOOT_DS
+must have read/write permission; CS must be __BOOT_CS and DS, ES, SS
+must be __BOOT_DS; interrupt must be disabled; %esi must hold the base
+address of the struct boot_params; %ebp, %edi must be zero.
You missed the (ironically the only one currently existing) constraint
that %ebx must be zero.
-hpa
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