Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [PATCH v3 5/5] x86/entry: Make IA32 syscalls' availability depend on ia32_enabled() | Date | Sun, 18 Jun 2023 23:17:54 +0200 |
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On Fri, Jun 16 2023 at 15:57, Nikolay Borisov wrote: > Another major aspect of supporting running of 32bit processes is the > ability to access 32bit syscalls. Such syscalls are invoked either by > using the legacy int 0x80 call gate interface or via the newer sysenter > instruction. > > Ensure that if ia32 emulation is disabled (either at compile time or > runtime) then those 2 syscall mechanisms are also disabled.
AFAICT there are _three_ mechanisms for 32bit syscalls, no?
> void __init idt_setup_traps(void) > { > idt_setup_from_table(idt_table, def_idts, ARRAY_SIZE(def_idts), true); > + > + if (ia32_enabled()) { > + idt_setup_from_table(idt_table, ia32_idt, ARRAY_SIZE(ia32_idt), > + true);
Just let it stick out. The 80 character limit is history.
Thanks,
tglx
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