assembly - How to far jump to $0x9000:%ax using AT&T syntax? -

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i'm writing toy os learn workings of it, here came little problem. want long jump, follows:

ljmp $0x9000, *(%ax)

the section address 0x9000, offset address stored in register ax (currently i'm still under real mode), i've tried following, none of them worked.

ljmp $0x9000, ax ljmp $0x9000, %ax ljmp $0x9000, (%ax) ljmp $0x9000, *(%ax)

so how trick? i'm using gnu (i686-elf-as).

as alternative "nrz"'s method may push 0x9000 , ax , perform retf:

pushw $0x9000 push %ax retf

note: on original 8086s , 8088s "pushw $xxxx" instruction not exist...


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