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Subject[PATCH 4.19 001/276] x86: Hide the int3_emulate_call/jmp functions from UML
Date
From: Steven Rostedt (VMware) <rostedt@goodmis.org>

commit 693713cbdb3a4bda5a8a678c31f06560bbb14657 upstream.

User Mode Linux does not have access to the ip or sp fields of the pt_regs,
and accessing them causes UML to fail to build. Hide the int3_emulate_jmp()
and int3_emulate_call() instructions from UML, as it doesn't need them
anyway.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/x86/include/asm/text-patching.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/x86/include/asm/text-patching.h
+++ b/arch/x86/include/asm/text-patching.h
@@ -39,6 +39,7 @@ extern int poke_int3_handler(struct pt_r
extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler);
extern int after_bootmem;

+#ifndef CONFIG_UML_X86
static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip)
{
regs->ip = ip;
@@ -65,6 +66,7 @@ static inline void int3_emulate_call(str
int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE);
int3_emulate_jmp(regs, func);
}
-#endif
+#endif /* CONFIG_X86_64 */
+#endif /* !CONFIG_UML_X86 */

#endif /* _ASM_X86_TEXT_PATCHING_H */

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