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Message-Id: <20200225222649.353236304@linutronix.de>
Date: Tue, 25 Feb 2020 23:16:18 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, Steven Rostedt <rostedt@...dmis.org>,
Brian Gerst <brgerst@...il.com>,
Juergen Gross <jgross@...e.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Arnd Bergmann <arnd@...db.de>
Subject: [patch 12/24] x86/entry: Convert Invalid Opcode exception to IDTENTRY
Convert #UD to IDTENTRY:
- 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 prototyoes
No functional change.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/entry/entry_32.S | 7 -------
arch/x86/entry/entry_64.S | 1 -
arch/x86/include/asm/idtentry.h | 1 +
arch/x86/include/asm/traps.h | 3 ---
arch/x86/kernel/idt.c | 2 +-
arch/x86/kernel/traps.c | 7 ++++++-
arch/x86/xen/enlighten_pv.c | 2 +-
arch/x86/xen/xen-asm_64.S | 2 +-
8 files changed, 10 insertions(+), 15 deletions(-)
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1334,13 +1334,6 @@ SYM_CODE_START(native_iret)
SYM_CODE_END(native_iret)
#endif
-SYM_CODE_START(invalid_op)
- ASM_CLAC
- pushl $0
- pushl $do_invalid_op
- jmp common_exception
-SYM_CODE_END(invalid_op)
-
SYM_CODE_START(coprocessor_segment_overrun)
ASM_CLAC
pushl $0
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1061,7 +1061,6 @@ apicinterrupt IRQ_WORK_VECTOR irq_work
* Exception entry points.
*/
-idtentry X86_TRAP_UD invalid_op do_invalid_op has_error_code=0
idtentry X86_TRAP_NM device_not_available do_device_not_available has_error_code=0
idtentry X86_TRAP_OLD_MF coprocessor_segment_overrun do_coprocessor_segment_overrun has_error_code=0
idtentry X86_TRAP_TS invalid_TSS do_invalid_TSS has_error_code=1
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -81,5 +81,6 @@ DECLARE_IDTENTRY(X86_TRAP_DE, exc_divid
DECLARE_IDTENTRY(X86_TRAP_BP, exc_int3);
DECLARE_IDTENTRY(X86_TRAP_OF, exc_overflow);
DECLARE_IDTENTRY(X86_TRAP_BR, exc_bounds);
+DECLARE_IDTENTRY(X86_TRAP_UD, exc_invalid_op);
#endif
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -13,7 +13,6 @@
asmlinkage void debug(void);
asmlinkage void nmi(void);
-asmlinkage void invalid_op(void);
asmlinkage void device_not_available(void);
#ifdef CONFIG_X86_64
asmlinkage void double_fault(void);
@@ -36,7 +35,6 @@ asmlinkage void simd_coprocessor_error(v
#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
asmlinkage void xen_xennmi(void);
asmlinkage void xen_xendebug(void);
-asmlinkage void xen_invalid_op(void);
asmlinkage void xen_device_not_available(void);
asmlinkage void xen_double_fault(void);
asmlinkage void xen_coprocessor_segment_overrun(void);
@@ -56,7 +54,6 @@ asmlinkage void xen_simd_coprocessor_err
dotraplinkage void do_debug(struct pt_regs *regs, long error_code);
dotraplinkage void do_nmi(struct pt_regs *regs, long error_code);
-dotraplinkage void do_invalid_op(struct pt_regs *regs, long error_code);
dotraplinkage void do_device_not_available(struct pt_regs *regs, long error_code);
#if defined(CONFIG_X86_64) || defined(CONFIG_DOUBLEFAULT)
dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code, unsigned long cr2);
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -73,7 +73,7 @@ static const __initconst struct idt_data
INTG(X86_TRAP_DE, asm_exc_divide_error),
INTG(X86_TRAP_NMI, nmi),
INTG(X86_TRAP_BR, asm_exc_bounds),
- INTG(X86_TRAP_UD, invalid_op),
+ INTG(X86_TRAP_UD, asm_exc_invalid_op),
INTG(X86_TRAP_NM, device_not_available),
INTG(X86_TRAP_OLD_MF, coprocessor_segment_overrun),
INTG(X86_TRAP_TS, invalid_TSS),
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -290,6 +290,12 @@ DEFINE_IDTENTRY(exc_overflow)
do_error_trap(regs, 0, "overflow", X86_TRAP_OF, SIGSEGV, 0, NULL);
}
+DEFINE_IDTENTRY(exc_invalid_op)
+{
+ do_error_trap(regs, 0, "invalid opcode", X86_TRAP_UD, SIGILL,
+ ILL_ILLOPN, error_get_trap_addr(regs));
+}
+
#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) \
@@ -297,7 +303,6 @@ dotraplinkage void do_##name(struct pt_r
do_error_trap(regs, error_code, str, trapnr, signr, sicode, addr); \
}
-DO_ERROR(X86_TRAP_UD, SIGILL, ILL_ILLOPN, IP, "invalid opcode", invalid_op)
DO_ERROR(X86_TRAP_OLD_MF, SIGFPE, 0, NULL, "coprocessor segment overrun", coprocessor_segment_overrun)
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)
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -622,7 +622,7 @@ static struct trap_array_entry trap_arra
{ page_fault, xen_page_fault, false },
TRAP_ENTRY(exc_divide_error, false ),
TRAP_ENTRY(exc_bounds, false ),
- { invalid_op, xen_invalid_op, false },
+ TRAP_ENTRY(exc_invalid_op, false ),
{ device_not_available, xen_device_not_available, false },
{ coprocessor_segment_overrun, xen_coprocessor_segment_overrun, false },
{ invalid_TSS, xen_invalid_TSS, false },
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -35,7 +35,7 @@ xen_pv_trap asm_exc_int3
xen_pv_trap xennmi
xen_pv_trap asm_exc_overflow
xen_pv_trap asm_exc_bounds
-xen_pv_trap invalid_op
+xen_pv_trap asm_exc_invalid_op
xen_pv_trap device_not_available
xen_pv_trap double_fault
xen_pv_trap coprocessor_segment_overrun
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