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x86/entry: Convert Stack segment exception to IDTENTRY

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Convert #SS to IDTENTRY_ERRORCODE:
  - Implement the C entry point with DEFINE_IDTENTRY
  - Emit the ASM stub with DECLARE_IDTENTRY
  - Remove the ASM idtentry in 64bit
  - Remove the open coded ASM entry code in 32bit
  - Fixup the XEN/PV code
  - Remove the old prototypes

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505134905.539867572@linutronix.de
This commit is contained in:
Thomas Gleixner
2020-02-25 23:16:24 +01:00
parent 99a3fb8d01
commit fd9689bf91
8 changed files with 8 additions and 21 deletions
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2
arch/x86/kernel/idt.c
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@@ -81,7 +81,7 @@ static const __initconst struct idt_data def_idts[] = {
INTG(X86_TRAP_OLD_MF, asm_exc_coproc_segment_overrun),
INTG(X86_TRAP_TS, asm_exc_invalid_tss),
INTG(X86_TRAP_NP, asm_exc_segment_not_present),
INTG(X86_TRAP_SS, stack_segment),
INTG(X86_TRAP_SS, asm_exc_stack_segment),
INTG(X86_TRAP_GP, general_protection),
INTG(X86_TRAP_SPURIOUS, spurious_interrupt_bug),
INTG(X86_TRAP_MF, coprocessor_error),

12
arch/x86/kernel/traps.c
View File

@@ -264,16 +264,12 @@ DEFINE_IDTENTRY_ERRORCODE(exc_segment_not_present)
SIGBUS, 0, NULL);
}
#define IP ((void __user *)uprobe_get_trap_addr(regs))
#define DO_ERROR(trapnr, signr, sicode, addr, str, name) \
dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
do_error_trap(regs, error_code, str, trapnr, signr, sicode, addr); \
DEFINE_IDTENTRY_ERRORCODE(exc_stack_segment)
{
do_error_trap(regs, error_code, "stack segment", X86_TRAP_SS, SIGBUS,
0, NULL);
}
DO_ERROR(X86_TRAP_SS, SIGBUS, 0, NULL, "stack segment", stack_segment)
#undef IP
dotraplinkage void do_alignment_check(struct pt_regs *regs, long error_code)
{
char *str = "alignment check";