diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-08 16:30:24 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-03-15 10:32:35 +0100 |
| commit | 8f93402b92d443573d310250efa0b7f352fec992 (patch) | |
| tree | 11266084433c7e14a33df1318ebfb82e5357a5f1 /arch/x86/kernel/idt.c | |
| parent | 5b2fc51576eff811a614e33cbbd0c3cb05022892 (diff) | |
| download | linux-next-8f93402b92d443573d310250efa0b7f352fec992.tar.gz | |
x86/ibt,entry: Sprinkle ENDBR dust
Kernel entry points should be having ENDBR on for IBT configs.
The SYSCALL entry points are found through taking their respective
address in order to program them in the MSRs, while the exception
entry points are found through UNWIND_HINT_IRET_REGS.
The rule is that any UNWIND_HINT_IRET_REGS at sym+0 should have an
ENDBR, see the later objtool ibt validation patch.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154317.933157479@infradead.org
Diffstat (limited to 'arch/x86/kernel/idt.c')
| -rw-r--r-- | arch/x86/kernel/idt.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index df0fa695bb09..7676e3444c83 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -10,6 +10,7 @@ #include <asm/proto.h> #include <asm/desc.h> #include <asm/hw_irq.h> +#include <asm/idtentry.h> #define DPL0 0x0 #define DPL3 0x3 @@ -272,7 +273,7 @@ void __init idt_setup_apic_and_irq_gates(void) idt_setup_from_table(idt_table, apic_idts, ARRAY_SIZE(apic_idts), true); for_each_clear_bit_from(i, system_vectors, FIRST_SYSTEM_VECTOR) { - entry = irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR); + entry = irq_entries_start + IDT_ALIGN * (i - FIRST_EXTERNAL_VECTOR); set_intr_gate(i, entry); } @@ -283,7 +284,7 @@ void __init idt_setup_apic_and_irq_gates(void) * system_vectors bitmap. Otherwise they show up in * /proc/interrupts. */ - entry = spurious_entries_start + 8 * (i - FIRST_SYSTEM_VECTOR); + entry = spurious_entries_start + IDT_ALIGN * (i - FIRST_SYSTEM_VECTOR); set_intr_gate(i, entry); } #endif |