On Mon, Jul 08, 2024 at 11:49:24AM -0000, tip-bot2 for Alexandre Chartre wrote:
> 4c 8b 24 25 e0 ff ff mov 0xffffffffffffffe0,%r12
Right, this is missing a "ff" which is the 4th byte of a disp32.
I.e., ModRM=0, SIB=5 simply means that what follows is a disp32 field:
REX: 0x4c { 4 [w]: 1 [r]: 1 [x]: 0 [b]: 0 }
Opcode: 0x8b
ModRM: 0x24 [mod:0b][.R:1b,reg:1100b][.B:0b,r/m:100b]
register-indirect mode, offset 0
SIB: 0x25 [.B:0b,base:101b][.X:0b,idx:100b][scale: 0]
MOV Gv,Ev; MOV reg{16,32,64} reg/mem{16,32,64}
0: 4c 8b 24 25 e0 ff ff mov 0xffffffffffffffe0,%r12
7: ff
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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