Damien Zammit, le mar. 30 janv. 2024 01:55:32 +, a ecrit:
> On 1/29/24 9:20 PM, Samuel Thibault wrote:
> > Damien Zammit, le lun. 29 janv. 2024 10:07:30 +, a ecrit:
> >> - ljmp$BOOT_CS, $M(0f)
> >> + xorl%eax, %eax
> >> + mov %cs, %ax
> >> + shll$4, %eax
> >> + addl
Hello,
Jessica Clarke, le mar. 30 janv. 2024 16:07:29 +, a ecrit:
> On 30 Jan 2024, at 09:02, Samuel Thibault wrote:
> >
> > Jessica Clarke, le mar. 30 janv. 2024 02:32:07 +, a ecrit:
> >> On 29 Jan 2024, at 10:20, Samuel Thibault wrote:
> >>>
> >>> Damien Zammit, le lun. 29 janv. 2024
On 30 Jan 2024, at 09:02, Samuel Thibault wrote:
>
> Jessica Clarke, le mar. 30 janv. 2024 02:32:07 +, a ecrit:
>> On 29 Jan 2024, at 10:20, Samuel Thibault wrote:
>>>
>>> Damien Zammit, le lun. 29 janv. 2024 10:07:30 +, a ecrit:
- ljmp $BOOT_CS, $M(0f)
+ xorl %eax, %eax
Jessica Clarke, le mar. 30 janv. 2024 02:32:07 +, a ecrit:
> On 29 Jan 2024, at 10:20, Samuel Thibault wrote:
> >
> > Damien Zammit, le lun. 29 janv. 2024 10:07:30 +, a ecrit:
> >> - ljmp $BOOT_CS, $M(0f)
> >> + xorl %eax, %eax
> >> + mov %cs, %ax
> >> + shll $4, %eax
> >> + addl $M(0f),
On 29 Jan 2024, at 10:20, Samuel Thibault wrote:
>
> Damien Zammit, le lun. 29 janv. 2024 10:07:30 +, a ecrit:
>> - ljmp $BOOT_CS, $M(0f)
>> + xorl %eax, %eax
>> + mov %cs, %ax
>> + shll $4, %eax
>> + addl $M(0f), %eax
>> + movl %eax, M(ljmp_offset32)
>
> This won't work with pipelined proce
Hi Samuel,
On 1/29/24 9:20 PM, Samuel Thibault wrote:
> Damien Zammit, le lun. 29 janv. 2024 10:07:30 +, a ecrit:
>> -ljmp$BOOT_CS, $M(0f)
>> +xorl%eax, %eax
>> +mov %cs, %ax
>> +shll$4, %eax
>> +addl$M(0f), %eax
>> +movl%eax, M(ljmp_offset32)
>
Damien Zammit, le lun. 29 janv. 2024 10:07:30 +, a ecrit:
> - ljmp$BOOT_CS, $M(0f)
> + xorl%eax, %eax
> + mov %cs, %ax
> + shll$4, %eax
> + addl$M(0f), %eax
> + movl%eax, M(ljmp_offset32)
This won't work with pipelined processors, which assume a
This took some time to figure out.
Involves hand-crafted 16 bit assembly instructions [1]
because GNU AS does not fully understand real-mode x86.
[1] Intel Architecture Software Developer's Manual,
Volume 2: Instruction Set Reference Manual
---
i386/i386/cpuboot.S | 32 ++
