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x86/entry: Convert Invalid TSS exception to IDTENTRY

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Convert #TS 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: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134905.350676449@linutronix.de
This commit is contained in:
Thomas Gleixner
2020-02-25 23:16:22 +01:00
parent aabfe5383e
commit 97b3d290b8
8 changed files with 12 additions and 14 deletions
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7
arch/x86/kernel/traps.c
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@@ -252,6 +252,12 @@ DEFINE_IDTENTRY(exc_coproc_segment_overrun)
X86_TRAP_OLD_MF, SIGFPE, 0, NULL);
}
DEFINE_IDTENTRY_ERRORCODE(exc_invalid_tss)
{
do_error_trap(regs, error_code, "invalid TSS", X86_TRAP_TS, SIGSEGV,
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) \
@@ -259,7 +265,6 @@ dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
do_error_trap(regs, error_code, str, trapnr, signr, sicode, addr); \
}
DO_ERROR(X86_TRAP_TS, SIGSEGV, 0, NULL, "invalid TSS", invalid_TSS)
DO_ERROR(X86_TRAP_NP, SIGBUS, 0, NULL, "segment not present", segment_not_present)
DO_ERROR(X86_TRAP_SS, SIGBUS, 0, NULL, "stack segment", stack_segment)
#undef IP