... in preparation for changing how they're implemented.
Update the MISRA deviations with the new path.
No functional change.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
-doc_end
-doc_begin="Macros alternative_v?call[0-9] use sizeof and typeof to check that the argument types match the corresponding parameter ones."
--config=MC3A2.R13.6,reports+={deliberate,"any_area(any_loc(any_exp(macro(^alternative_vcall[0-9]$))&&file(^xen/arch/x86/include/asm/alternative\\.h*$)))"}
--config=B.UNEVALEFF,reports+={deliberate,"any_area(any_loc(any_exp(macro(^alternative_v?call[0-9]$))&&file(^xen/arch/x86/include/asm/alterantive\\.h*$)))"}
+-config=MC3A2.R13.6,reports+={deliberate,"any_area(any_loc(any_exp(macro(^alternative_vcall[0-9]$))&&file(^xen/arch/x86/include/asm/alternative-call\\.h*$)))"}
+-config=B.UNEVALEFF,reports+={deliberate,"any_area(any_loc(any_exp(macro(^alternative_v?call[0-9]$))&&file(^xen/arch/x86/include/asm/alterantive-call\\.h*$)))"}
-doc_end
-doc_begin="Anything, no matter how complicated, inside the BUILD_BUG_ON macro is subject to a compile-time evaluation without relevant side effects."
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef X86_ALTERNATIVE_CALL_H
+#define X86_ALTERNATIVE_CALL_H
+
+#include <asm/alternative.h>
+
+/*
+ * Machinery to allow converting indirect to direct calls, when the called
+ * function is determined once at boot and later never changed.
+ */
+
+#define ALT_CALL_arg1 "rdi"
+#define ALT_CALL_arg2 "rsi"
+#define ALT_CALL_arg3 "rdx"
+#define ALT_CALL_arg4 "rcx"
+#define ALT_CALL_arg5 "r8"
+#define ALT_CALL_arg6 "r9"
+
+#ifdef CONFIG_CC_IS_CLANG
+/*
+ * Clang doesn't follow the psABI and doesn't truncate parameter values at the
+ * callee. This can lead to bad code being generated when using alternative
+ * calls.
+ *
+ * Workaround it by using a temporary intermediate variable that's zeroed
+ * before being assigned the parameter value, as that forces clang to zero the
+ * register at the caller.
+ *
+ * This has been reported upstream:
+ * https://github.com/llvm/llvm-project/issues/12579
+ * https://github.com/llvm/llvm-project/issues/82598
+ */
+#define ALT_CALL_ARG(arg, n) \
+ register unsigned long a ## n ## _ asm ( ALT_CALL_arg ## n ) = ({ \
+ unsigned long tmp = 0; \
+ BUILD_BUG_ON(sizeof(arg) > sizeof(unsigned long)); \
+ *(typeof(arg) *)&tmp = (arg); \
+ tmp; \
+ })
+#else
+#define ALT_CALL_ARG(arg, n) \
+ register typeof(arg) a ## n ## _ asm ( ALT_CALL_arg ## n ) = \
+ ({ BUILD_BUG_ON(sizeof(arg) > sizeof(void *)); (arg); })
+#endif
+#define ALT_CALL_NO_ARG(n) \
+ register unsigned long a ## n ## _ asm ( ALT_CALL_arg ## n )
+
+#define ALT_CALL_NO_ARG6 ALT_CALL_NO_ARG(6)
+#define ALT_CALL_NO_ARG5 ALT_CALL_NO_ARG(5); ALT_CALL_NO_ARG6
+#define ALT_CALL_NO_ARG4 ALT_CALL_NO_ARG(4); ALT_CALL_NO_ARG5
+#define ALT_CALL_NO_ARG3 ALT_CALL_NO_ARG(3); ALT_CALL_NO_ARG4
+#define ALT_CALL_NO_ARG2 ALT_CALL_NO_ARG(2); ALT_CALL_NO_ARG3
+#define ALT_CALL_NO_ARG1 ALT_CALL_NO_ARG(1); ALT_CALL_NO_ARG2
+
+/*
+ * Unfortunately ALT_CALL_NO_ARG() above can't use a fake initializer (to
+ * suppress "uninitialized variable" warnings), as various versions of gcc
+ * older than 8.1 fall on the nose in various ways with that (always because
+ * of some other construct elsewhere in the same function needing to use the
+ * same hard register). Otherwise the asm() below could uniformly use "+r"
+ * output constraints, making unnecessary all these ALT_CALL<n>_OUT macros.
+ */
+#define ALT_CALL0_OUT "=r" (a1_), "=r" (a2_), "=r" (a3_), \
+ "=r" (a4_), "=r" (a5_), "=r" (a6_)
+#define ALT_CALL1_OUT "+r" (a1_), "=r" (a2_), "=r" (a3_), \
+ "=r" (a4_), "=r" (a5_), "=r" (a6_)
+#define ALT_CALL2_OUT "+r" (a1_), "+r" (a2_), "=r" (a3_), \
+ "=r" (a4_), "=r" (a5_), "=r" (a6_)
+#define ALT_CALL3_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
+ "=r" (a4_), "=r" (a5_), "=r" (a6_)
+#define ALT_CALL4_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
+ "+r" (a4_), "=r" (a5_), "=r" (a6_)
+#define ALT_CALL5_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
+ "+r" (a4_), "+r" (a5_), "=r" (a6_)
+#define ALT_CALL6_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
+ "+r" (a4_), "+r" (a5_), "+r" (a6_)
+
+#define alternative_callN(n, rettype, func) ({ \
+ rettype ret_; \
+ register unsigned long r10_ asm("r10"); \
+ register unsigned long r11_ asm("r11"); \
+ asm volatile (ALTERNATIVE("call *%c[addr](%%rip)", "call .", \
+ X86_FEATURE_ALWAYS) \
+ : ALT_CALL ## n ## _OUT, "=a" (ret_), \
+ "=r" (r10_), "=r" (r11_) ASM_CALL_CONSTRAINT \
+ : [addr] "i" (&(func)), "g" (func) \
+ : "memory" ); \
+ ret_; \
+})
+
+#define alternative_vcall0(func) ({ \
+ ALT_CALL_NO_ARG1; \
+ (void)sizeof(func()); \
+ (void)alternative_callN(0, int, func); \
+})
+
+#define alternative_call0(func) ({ \
+ ALT_CALL_NO_ARG1; \
+ alternative_callN(0, typeof(func()), func); \
+})
+
+#define alternative_vcall1(func, arg) ({ \
+ typeof(arg) v1_ = (arg); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_NO_ARG2; \
+ (void)sizeof(func(arg)); \
+ (void)alternative_callN(1, int, func); \
+})
+
+#define alternative_call1(func, arg) ({ \
+ typeof(arg) v1_ = (arg); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_NO_ARG2; \
+ alternative_callN(1, typeof(func(arg)), func); \
+})
+
+#define alternative_vcall2(func, arg1, arg2) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_NO_ARG3; \
+ (void)sizeof(func(arg1, arg2)); \
+ (void)alternative_callN(2, int, func); \
+})
+
+#define alternative_call2(func, arg1, arg2) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_NO_ARG3; \
+ alternative_callN(2, typeof(func(arg1, arg2)), func); \
+})
+
+#define alternative_vcall3(func, arg1, arg2, arg3) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_NO_ARG4; \
+ (void)sizeof(func(arg1, arg2, arg3)); \
+ (void)alternative_callN(3, int, func); \
+})
+
+#define alternative_call3(func, arg1, arg2, arg3) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_NO_ARG4; \
+ alternative_callN(3, typeof(func(arg1, arg2, arg3)), \
+ func); \
+})
+
+#define alternative_vcall4(func, arg1, arg2, arg3, arg4) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ typeof(arg4) v4_ = (arg4); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_ARG(v4_, 4); \
+ ALT_CALL_NO_ARG5; \
+ (void)sizeof(func(arg1, arg2, arg3, arg4)); \
+ (void)alternative_callN(4, int, func); \
+})
+
+#define alternative_call4(func, arg1, arg2, arg3, arg4) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ typeof(arg4) v4_ = (arg4); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_ARG(v4_, 4); \
+ ALT_CALL_NO_ARG5; \
+ alternative_callN(4, typeof(func(arg1, arg2, \
+ arg3, arg4)), \
+ func); \
+})
+
+#define alternative_vcall5(func, arg1, arg2, arg3, arg4, arg5) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ typeof(arg4) v4_ = (arg4); \
+ typeof(arg5) v5_ = (arg5); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_ARG(v4_, 4); \
+ ALT_CALL_ARG(v5_, 5); \
+ ALT_CALL_NO_ARG6; \
+ (void)sizeof(func(arg1, arg2, arg3, arg4, arg5)); \
+ (void)alternative_callN(5, int, func); \
+})
+
+#define alternative_call5(func, arg1, arg2, arg3, arg4, arg5) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ typeof(arg4) v4_ = (arg4); \
+ typeof(arg5) v5_ = (arg5); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_ARG(v4_, 4); \
+ ALT_CALL_ARG(v5_, 5); \
+ ALT_CALL_NO_ARG6; \
+ alternative_callN(5, typeof(func(arg1, arg2, arg3, \
+ arg4, arg5)), \
+ func); \
+})
+
+#define alternative_vcall6(func, arg1, arg2, arg3, arg4, arg5, arg6) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ typeof(arg4) v4_ = (arg4); \
+ typeof(arg5) v5_ = (arg5); \
+ typeof(arg6) v6_ = (arg6); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_ARG(v4_, 4); \
+ ALT_CALL_ARG(v5_, 5); \
+ ALT_CALL_ARG(v6_, 6); \
+ (void)sizeof(func(arg1, arg2, arg3, arg4, arg5, arg6)); \
+ (void)alternative_callN(6, int, func); \
+})
+
+#define alternative_call6(func, arg1, arg2, arg3, arg4, arg5, arg6) ({ \
+ typeof(arg1) v1_ = (arg1); \
+ typeof(arg2) v2_ = (arg2); \
+ typeof(arg3) v3_ = (arg3); \
+ typeof(arg4) v4_ = (arg4); \
+ typeof(arg5) v5_ = (arg5); \
+ typeof(arg6) v6_ = (arg6); \
+ ALT_CALL_ARG(v1_, 1); \
+ ALT_CALL_ARG(v2_, 2); \
+ ALT_CALL_ARG(v3_, 3); \
+ ALT_CALL_ARG(v4_, 4); \
+ ALT_CALL_ARG(v5_, 5); \
+ ALT_CALL_ARG(v6_, 6); \
+ alternative_callN(6, typeof(func(arg1, arg2, arg3, \
+ arg4, arg5, arg6)), \
+ func); \
+})
+
+#define alternative_vcall__(nr) alternative_vcall ## nr
+#define alternative_call__(nr) alternative_call ## nr
+
+#define alternative_vcall_(nr) alternative_vcall__(nr)
+#define alternative_call_(nr) alternative_call__(nr)
+
+#define alternative_vcall(func, args...) \
+ alternative_vcall_(count_args(args))(func, ## args)
+
+#define alternative_call(func, args...) \
+ alternative_call_(count_args(args))(func, ## args)
+
+#endif /* X86_ALTERNATIVE_CALL_H */
/* Use this macro(s) if you need more than one output parameter. */
#define ASM_OUTPUT2(a...) a
-/*
- * Machinery to allow converting indirect to direct calls, when the called
- * function is determined once at boot and later never changed.
- */
-
-#define ALT_CALL_arg1 "rdi"
-#define ALT_CALL_arg2 "rsi"
-#define ALT_CALL_arg3 "rdx"
-#define ALT_CALL_arg4 "rcx"
-#define ALT_CALL_arg5 "r8"
-#define ALT_CALL_arg6 "r9"
-
-#ifdef CONFIG_CC_IS_CLANG
-/*
- * Clang doesn't follow the psABI and doesn't truncate parameter values at the
- * callee. This can lead to bad code being generated when using alternative
- * calls.
- *
- * Workaround it by using a temporary intermediate variable that's zeroed
- * before being assigned the parameter value, as that forces clang to zero the
- * register at the caller.
- *
- * This has been reported upstream:
- * https://github.com/llvm/llvm-project/issues/12579
- * https://github.com/llvm/llvm-project/issues/82598
- */
-#define ALT_CALL_ARG(arg, n) \
- register unsigned long a ## n ## _ asm ( ALT_CALL_arg ## n ) = ({ \
- unsigned long tmp = 0; \
- BUILD_BUG_ON(sizeof(arg) > sizeof(unsigned long)); \
- *(typeof(arg) *)&tmp = (arg); \
- tmp; \
- })
-#else
-#define ALT_CALL_ARG(arg, n) \
- register typeof(arg) a ## n ## _ asm ( ALT_CALL_arg ## n ) = \
- ({ BUILD_BUG_ON(sizeof(arg) > sizeof(void *)); (arg); })
-#endif
-#define ALT_CALL_NO_ARG(n) \
- register unsigned long a ## n ## _ asm ( ALT_CALL_arg ## n )
-
-#define ALT_CALL_NO_ARG6 ALT_CALL_NO_ARG(6)
-#define ALT_CALL_NO_ARG5 ALT_CALL_NO_ARG(5); ALT_CALL_NO_ARG6
-#define ALT_CALL_NO_ARG4 ALT_CALL_NO_ARG(4); ALT_CALL_NO_ARG5
-#define ALT_CALL_NO_ARG3 ALT_CALL_NO_ARG(3); ALT_CALL_NO_ARG4
-#define ALT_CALL_NO_ARG2 ALT_CALL_NO_ARG(2); ALT_CALL_NO_ARG3
-#define ALT_CALL_NO_ARG1 ALT_CALL_NO_ARG(1); ALT_CALL_NO_ARG2
-
-/*
- * Unfortunately ALT_CALL_NO_ARG() above can't use a fake initializer (to
- * suppress "uninitialized variable" warnings), as various versions of gcc
- * older than 8.1 fall on the nose in various ways with that (always because
- * of some other construct elsewhere in the same function needing to use the
- * same hard register). Otherwise the asm() below could uniformly use "+r"
- * output constraints, making unnecessary all these ALT_CALL<n>_OUT macros.
- */
-#define ALT_CALL0_OUT "=r" (a1_), "=r" (a2_), "=r" (a3_), \
- "=r" (a4_), "=r" (a5_), "=r" (a6_)
-#define ALT_CALL1_OUT "+r" (a1_), "=r" (a2_), "=r" (a3_), \
- "=r" (a4_), "=r" (a5_), "=r" (a6_)
-#define ALT_CALL2_OUT "+r" (a1_), "+r" (a2_), "=r" (a3_), \
- "=r" (a4_), "=r" (a5_), "=r" (a6_)
-#define ALT_CALL3_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
- "=r" (a4_), "=r" (a5_), "=r" (a6_)
-#define ALT_CALL4_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
- "+r" (a4_), "=r" (a5_), "=r" (a6_)
-#define ALT_CALL5_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
- "+r" (a4_), "+r" (a5_), "=r" (a6_)
-#define ALT_CALL6_OUT "+r" (a1_), "+r" (a2_), "+r" (a3_), \
- "+r" (a4_), "+r" (a5_), "+r" (a6_)
-
-#define alternative_callN(n, rettype, func) ({ \
- rettype ret_; \
- register unsigned long r10_ asm("r10"); \
- register unsigned long r11_ asm("r11"); \
- asm volatile (ALTERNATIVE("call *%c[addr](%%rip)", "call .", \
- X86_FEATURE_ALWAYS) \
- : ALT_CALL ## n ## _OUT, "=a" (ret_), \
- "=r" (r10_), "=r" (r11_) ASM_CALL_CONSTRAINT \
- : [addr] "i" (&(func)), "g" (func) \
- : "memory" ); \
- ret_; \
-})
-
-#define alternative_vcall0(func) ({ \
- ALT_CALL_NO_ARG1; \
- (void)sizeof(func()); \
- (void)alternative_callN(0, int, func); \
-})
-
-#define alternative_call0(func) ({ \
- ALT_CALL_NO_ARG1; \
- alternative_callN(0, typeof(func()), func); \
-})
-
-#define alternative_vcall1(func, arg) ({ \
- typeof(arg) v1_ = (arg); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_NO_ARG2; \
- (void)sizeof(func(arg)); \
- (void)alternative_callN(1, int, func); \
-})
-
-#define alternative_call1(func, arg) ({ \
- typeof(arg) v1_ = (arg); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_NO_ARG2; \
- alternative_callN(1, typeof(func(arg)), func); \
-})
-
-#define alternative_vcall2(func, arg1, arg2) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_NO_ARG3; \
- (void)sizeof(func(arg1, arg2)); \
- (void)alternative_callN(2, int, func); \
-})
-
-#define alternative_call2(func, arg1, arg2) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_NO_ARG3; \
- alternative_callN(2, typeof(func(arg1, arg2)), func); \
-})
-
-#define alternative_vcall3(func, arg1, arg2, arg3) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_NO_ARG4; \
- (void)sizeof(func(arg1, arg2, arg3)); \
- (void)alternative_callN(3, int, func); \
-})
-
-#define alternative_call3(func, arg1, arg2, arg3) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_NO_ARG4; \
- alternative_callN(3, typeof(func(arg1, arg2, arg3)), \
- func); \
-})
-
-#define alternative_vcall4(func, arg1, arg2, arg3, arg4) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- typeof(arg4) v4_ = (arg4); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_ARG(v4_, 4); \
- ALT_CALL_NO_ARG5; \
- (void)sizeof(func(arg1, arg2, arg3, arg4)); \
- (void)alternative_callN(4, int, func); \
-})
-
-#define alternative_call4(func, arg1, arg2, arg3, arg4) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- typeof(arg4) v4_ = (arg4); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_ARG(v4_, 4); \
- ALT_CALL_NO_ARG5; \
- alternative_callN(4, typeof(func(arg1, arg2, \
- arg3, arg4)), \
- func); \
-})
-
-#define alternative_vcall5(func, arg1, arg2, arg3, arg4, arg5) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- typeof(arg4) v4_ = (arg4); \
- typeof(arg5) v5_ = (arg5); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_ARG(v4_, 4); \
- ALT_CALL_ARG(v5_, 5); \
- ALT_CALL_NO_ARG6; \
- (void)sizeof(func(arg1, arg2, arg3, arg4, arg5)); \
- (void)alternative_callN(5, int, func); \
-})
-
-#define alternative_call5(func, arg1, arg2, arg3, arg4, arg5) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- typeof(arg4) v4_ = (arg4); \
- typeof(arg5) v5_ = (arg5); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_ARG(v4_, 4); \
- ALT_CALL_ARG(v5_, 5); \
- ALT_CALL_NO_ARG6; \
- alternative_callN(5, typeof(func(arg1, arg2, arg3, \
- arg4, arg5)), \
- func); \
-})
-
-#define alternative_vcall6(func, arg1, arg2, arg3, arg4, arg5, arg6) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- typeof(arg4) v4_ = (arg4); \
- typeof(arg5) v5_ = (arg5); \
- typeof(arg6) v6_ = (arg6); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_ARG(v4_, 4); \
- ALT_CALL_ARG(v5_, 5); \
- ALT_CALL_ARG(v6_, 6); \
- (void)sizeof(func(arg1, arg2, arg3, arg4, arg5, arg6)); \
- (void)alternative_callN(6, int, func); \
-})
-
-#define alternative_call6(func, arg1, arg2, arg3, arg4, arg5, arg6) ({ \
- typeof(arg1) v1_ = (arg1); \
- typeof(arg2) v2_ = (arg2); \
- typeof(arg3) v3_ = (arg3); \
- typeof(arg4) v4_ = (arg4); \
- typeof(arg5) v5_ = (arg5); \
- typeof(arg6) v6_ = (arg6); \
- ALT_CALL_ARG(v1_, 1); \
- ALT_CALL_ARG(v2_, 2); \
- ALT_CALL_ARG(v3_, 3); \
- ALT_CALL_ARG(v4_, 4); \
- ALT_CALL_ARG(v5_, 5); \
- ALT_CALL_ARG(v6_, 6); \
- alternative_callN(6, typeof(func(arg1, arg2, arg3, \
- arg4, arg5, arg6)), \
- func); \
-})
-
-#define alternative_vcall__(nr) alternative_vcall ## nr
-#define alternative_call__(nr) alternative_call ## nr
-
-#define alternative_vcall_(nr) alternative_vcall__(nr)
-#define alternative_call_(nr) alternative_call__(nr)
-
-#define alternative_vcall(func, args...) \
- alternative_vcall_(count_args(args))(func, ## args)
-
-#define alternative_call(func, args...) \
- alternative_call_(count_args(args))(func, ## args)
-
#endif /* !__ASSEMBLY__ */
#endif /* __X86_ALTERNATIVE_H__ */
#ifndef __ASM_X86_HVM_HVM_H__
#define __ASM_X86_HVM_HVM_H__
+#include <xen/alternative-call.h>
#include <xen/mm.h>
-#include <asm/alternative.h>
#include <asm/asm_defns.h>
#include <asm/current.h>
#include <asm/x86_emulate.h>
* General Public License for more details.
*/
-#include <xen/types.h>
+#include <xen/alternative-call.h>
#include <xen/cpu.h>
-#include <xen/init.h>
#include <xen/cpumask.h>
+#include <xen/init.h>
#include <xen/param.h>
#include <asm/smp.h>
*
* For architectures to support:
*
- * - Implement alternative_{,v}call() in asm/alternative.h. Code generation
- * requirements are to emit a function pointer call at build time, and stash
- * enough metadata to simplify the call at boot once the implementation has
- * been resolved.
+ * - Implement alternative_{,v}call() in asm/alternative-call.h. Code
+ * generation requirements are to emit a function pointer call at build
+ * time, and stash enough metadata to simplify the call at boot once the
+ * implementation has been resolved.
* - Select ALTERNATIVE_CALL in Kconfig.
*
* To use:
#ifdef CONFIG_ALTERNATIVE_CALL
-#include <asm/alternative.h>
+#include <asm/alternative-call.h>
#ifdef CONFIG_LIVEPATCH
/* Must keep for livepatches to resolve alternative calls. */
projects / people / royger / xen.git / commitdiff