* [PATCH 1/5] x86: Refactor syscall_wrapper.h
2020-02-21 5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
@ 2020-02-21 5:09 ` Brian Gerst
2020-02-21 6:47 ` Dominik Brodowski
2020-02-21 5:09 ` [PATCH 2/5] x86: Move 32-bit compat syscalls to common location Brian Gerst
` (4 subsequent siblings)
5 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 5:09 UTC (permalink / raw)
To: linux-kernel, x86
Cc: Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski, Brian Gerst
Refactor syscall_wrapper.h to make the code more understandable, and
prepare for enabling pt_regs based syscalls for 32-bit native.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/include/asm/syscall_wrapper.h | 363 +++++++++++++------------
1 file changed, 194 insertions(+), 169 deletions(-)
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h
index e2389ce9bf58..00be12017118 100644
--- a/arch/x86/include/asm/syscall_wrapper.h
+++ b/arch/x86/include/asm/syscall_wrapper.h
@@ -8,6 +8,40 @@
struct pt_regs;
+/*
+ * Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
+ * struct pt_regs *regs as the only argument of the syscall stub named
+ * __x64_sys_*(). It decodes just the registers it needs and passes them on to
+ * the __se_sys_*() wrapper performing sign extension and then to the
+ * __do_sys_*() function doing the actual job. These wrappers and functions
+ * are inlined (at least in very most cases), meaning that the assembly looks
+ * as follows (slightly re-ordered for better readability):
+ *
+ * <__x64_sys_recv>: <-- syscall with 4 parameters
+ * callq <__fentry__>
+ *
+ * mov 0x70(%rdi),%rdi <-- decode regs->di
+ * mov 0x68(%rdi),%rsi <-- decode regs->si
+ * mov 0x60(%rdi),%rdx <-- decode regs->dx
+ * mov 0x38(%rdi),%rcx <-- decode regs->r10
+ *
+ * xor %r9d,%r9d <-- clear %r9
+ * xor %r8d,%r8d <-- clear %r8
+ *
+ * callq __sys_recvfrom <-- do the actual work in __sys_recvfrom()
+ * which takes 6 arguments
+ *
+ * cltq <-- extend return value to 64-bit
+ * retq <-- return
+ *
+ * This approach avoids leaking random user-provided register content down
+ * the call chain.
+ *
+ * If IA32_EMULATION is enabled, this macro generates an additional wrapper
+ * named __ia32_sys_*() which decodes the struct pt_regs *regs according
+ * to the i386 calling convention (bx, cx, dx, si, di, bp).
+ */
+
/* Mapping of registers to parameters for syscalls on x86-64 and x32 */
#define SC_X86_64_REGS_TO_ARGS(x, ...) \
__MAP(x,__SC_ARGS \
@@ -21,68 +55,146 @@ struct pt_regs;
,,(unsigned int)regs->dx,,(unsigned int)regs->si \
,,(unsigned int)regs->di,,(unsigned int)regs->bp)
-#ifdef CONFIG_IA32_EMULATION
-/*
- * For IA32 emulation, we need to handle "compat" syscalls *and* create
- * additional wrappers (aptly named __ia32_sys_xyzzy) which decode the
- * ia32 regs in the proper order for shared or "common" syscalls. As some
- * syscalls may not be implemented, we need to expand COND_SYSCALL in
- * kernel/sys_ni.c and SYS_NI in kernel/time/posix-stubs.c to cover this
- * case as well.
- */
-#define __IA32_COMPAT_SYS_STUB0(x, name) \
- asmlinkage long __ia32_compat_sys_##name(const struct pt_regs *regs);\
- ALLOW_ERROR_INJECTION(__ia32_compat_sys_##name, ERRNO); \
- asmlinkage long __ia32_compat_sys_##name(const struct pt_regs *regs)\
+#define __SYS_STUBx(abi, name, ...) \
+ asmlinkage long __##abi##_##name(const struct pt_regs *regs); \
+ ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
+ asmlinkage long __##abi##_##name(const struct pt_regs *regs) \
{ \
- return __se_compat_sys_##name(); \
+ return __se_##name(__VA_ARGS__); \
}
-#define __IA32_COMPAT_SYS_STUBx(x, name, ...) \
- asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs);\
- ALLOW_ERROR_INJECTION(__ia32_compat_sys##name, ERRNO); \
- asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs)\
+#define __SYS_STUB0(abi, name) \
+ asmlinkage long __##abi##_##name(const struct pt_regs *regs); \
+ ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
+ asmlinkage long __##abi##_##name(const struct pt_regs *regs) \
{ \
- return __se_compat_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\
+ return __do_##name(); \
}
-#define __IA32_SYS_STUBx(x, name, ...) \
- asmlinkage long __ia32_sys##name(const struct pt_regs *regs); \
- ALLOW_ERROR_INJECTION(__ia32_sys##name, ERRNO); \
- asmlinkage long __ia32_sys##name(const struct pt_regs *regs) \
+#define __COND_SYSCALL(abi, name) \
+ asmlinkage __weak long \
+ __##abi##_##name(const struct pt_regs *regs) \
{ \
- return __se_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\
+ return sys_ni_syscall(); \
}
+#ifdef CONFIG_X86_64
+#define __X64_SYS_STUBx(x, name, ...) \
+ __SYS_STUBx(x64, name, SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__))
+
+#define __X64_SYS_STUB0(name) \
+ __SYS_STUB0(x64, name)
+
+#define __X64_COND_SYSCALL(name) \
+ __COND_SYSCALL(x64, name)
+
+#define __X64_SYS_NI(name) \
+ SYSCALL_ALIAS(__x64_sys_##name, sys_ni_posix_timers)
+
+#else /* CONFIG_X86_64 */
+#define __X64_SYS_STUBx(x, name, ...)
+#define __X64_SYS_STUB0(name)
+#define __X64_COND_SYSCALL(name)
+#define __X64_SYS_NI(name)
+#endif /* CONFIG_X86_64 */
+
+
+#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
+#define __IA32_SYS_STUBx(x, name, ...) \
+ __SYS_STUBx(ia32, name, SC_IA32_REGS_TO_ARGS(x, __VA_ARGS__))
+
+#define __IA32_SYS_STUB0(name) \
+ __SYS_STUB0(ia32, name)
+
+#define __IA32_COND_SYSCALL(name) \
+ __COND_SYSCALL(ia32, name)
+
+#define __IA32_SYS_NI(name) \
+ SYSCALL_ALIAS(__ia32_sys_##name, sys_ni_posix_timers)
+
+#else /* CONFIG_X86_32 || CONFIG_IA32_EMULATION */
+#define __IA32_SYS_STUBx(x, name, ...)
+#define __IA32_SYS_STUB0(name)
+#define __IA32_COND_SYSCALL(name)
+#define __IA32_SYS_NI(name)
+#endif /* CONFIG_X86_32 || CONFIG_IA32_EMULATION */
+
+
+#define __SYSCALL_DEFINEx(x, name, ...) \
+ static long \
+ __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__)); \
+ static inline long \
+ __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__)); \
+ __X64_SYS_STUBx(x, sys##name, __VA_ARGS__) \
+ __IA32_SYS_STUBx(x, sys##name, __VA_ARGS__) \
+ static long \
+ __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__)) \
+ { \
+ long ret = __do_sys##name(__MAP(x, __SC_CAST, \
+ __VA_ARGS__)); \
+ __MAP(x, __SC_TEST, __VA_ARGS__); \
+ __PROTECT(x, ret, __MAP(x, __SC_ARGS, __VA_ARGS__)); \
+ return ret; \
+ } \
+ static inline long \
+ __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__))
+
/*
- * To keep the naming coherent, re-define SYSCALL_DEFINE0 to create an alias
- * named __ia32_sys_*()
+ * As the generic SYSCALL_DEFINE0() macro does not decode any parameters for
+ * obvious reasons, and passing struct pt_regs *regs to it in %rdi does not
+ * hurt, we only need to re-define it here to keep the naming congruent to
+ * SYSCALL_DEFINEx() -- which is essential for the COND_SYSCALL() and SYS_NI()
+ * macros to work correctly.
*/
+#define SYSCALL_DEFINE0(name) \
+ SYSCALL_METADATA(_##name, 0); \
+ static inline long __do_sys_##name(void); \
+ __X64_SYS_STUB0(sys_##name) \
+ __IA32_SYS_STUB0(sys_##name) \
+ static inline long __do_sys_##name(void)
-#define SYSCALL_DEFINE0(sname) \
- SYSCALL_METADATA(_##sname, 0); \
- asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused);\
- ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \
- SYSCALL_ALIAS(__ia32_sys_##sname, __x64_sys_##sname); \
- asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused)
-
-#define COND_SYSCALL(name) \
- asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \
- { \
- return sys_ni_syscall(); \
- } \
- asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\
- { \
- return sys_ni_syscall(); \
- }
+#define COND_SYSCALL(name) \
+ __X64_COND_SYSCALL(sys_##name) \
+ __IA32_COND_SYSCALL(sys_##name)
-#define SYS_NI(name) \
- SYSCALL_ALIAS(__x64_sys_##name, sys_ni_posix_timers); \
- SYSCALL_ALIAS(__ia32_sys_##name, sys_ni_posix_timers)
+#define SYS_NI(name) \
+ __X64_SYS_NI(name) \
+ __IA32_SYS_NI(name)
+
+
+#ifdef CONFIG_COMPAT
+/*
+ * Compat means IA32_EMULATION and/or X86_X32. As they use a different
+ * mapping of registers to parameters, we need to generate stubs for each
+ * of them.
+ */
+
+#ifdef CONFIG_IA32_EMULATION
+/*
+ * For IA32 emulation, we need to handle "compat" syscalls *and* create
+ * additional wrappers (aptly named __ia32_sys_xyzzy) which decode the
+ * ia32 regs in the proper order for shared or "common" syscalls. As some
+ * syscalls may not be implemented, we need to expand COND_SYSCALL in
+ * kernel/sys_ni.c and SYS_NI in kernel/time/posix-stubs.c to cover this
+ * case as well.
+ */
+#define __IA32_COMPAT_SYS_STUBx(x, name, ...) \
+ __SYS_STUBx(ia32, name, SC_IA32_REGS_TO_ARGS(x, __VA_ARGS__))
+
+#define __IA32_COMPAT_SYS_STUB0(name) \
+ __SYS_STUB0(ia32, name)
+
+#define __IA32_COMPAT_COND_SYSCALL(name) \
+ __COND_SYSCALL(ia32, name)
+
+#define __IA32_COMPAT_SYS_NI(name) \
+ SYSCALL_ALIAS(__ia32_compat_sys_##name, sys_ni_posix_timers)
#else /* CONFIG_IA32_EMULATION */
#define __IA32_COMPAT_SYS_STUBx(x, name, ...)
-#define __IA32_SYS_STUBx(x, fullname, name, ...)
+#define __IA32_COMPAT_SYS_STUB0(name)
+#define __IA32_COMPAT_COND_SYSCALL(name)
+#define __IA32_COMPAT_SYS_NI(name)
#endif /* CONFIG_IA32_EMULATION */
@@ -92,55 +204,48 @@ struct pt_regs;
* of the x86-64-style parameter ordering of x32 syscalls. The syscalls common
* with x86_64 obviously do not need such care.
*/
-#define __X32_COMPAT_SYS_STUB0(x, name, ...) \
- asmlinkage long __x32_compat_sys_##name(const struct pt_regs *regs);\
- ALLOW_ERROR_INJECTION(__x32_compat_sys_##name, ERRNO); \
- asmlinkage long __x32_compat_sys_##name(const struct pt_regs *regs)\
- { \
- return __se_compat_sys_##name();\
- }
-
#define __X32_COMPAT_SYS_STUBx(x, name, ...) \
- asmlinkage long __x32_compat_sys##name(const struct pt_regs *regs);\
- ALLOW_ERROR_INJECTION(__x32_compat_sys##name, ERRNO); \
- asmlinkage long __x32_compat_sys##name(const struct pt_regs *regs)\
- { \
- return __se_compat_sys##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\
- }
+ __SYS_STUBx(x32, name, SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__))
+
+#define __X32_COMPAT_SYS_STUB0(name) \
+ __SYS_STUB0(x32, name)
+
+#define __X32_COMPAT_COND_SYSCALL(name) \
+ __COND_SYSCALL(x32, name)
+
+#define __X32_COMPAT_SYS_NI(name) \
+ SYSCALL_ALIAS(__x32_compat_sys_##name, sys_ni_posix_timers)
#else /* CONFIG_X86_X32 */
-#define __X32_COMPAT_SYS_STUB0(x, name)
#define __X32_COMPAT_SYS_STUBx(x, name, ...)
+#define __X32_COMPAT_SYS_STUB0(name)
+#define __X32_COMPAT_COND_SYSCALL(name)
+#define __X32_COMPAT_SYS_NI(name)
#endif /* CONFIG_X86_X32 */
-#ifdef CONFIG_COMPAT
-/*
- * Compat means IA32_EMULATION and/or X86_X32. As they use a different
- * mapping of registers to parameters, we need to generate stubs for each
- * of them.
- */
-#define COMPAT_SYSCALL_DEFINE0(name) \
- static long __se_compat_sys_##name(void); \
- static inline long __do_compat_sys_##name(void); \
- __IA32_COMPAT_SYS_STUB0(x, name) \
- __X32_COMPAT_SYS_STUB0(x, name) \
- static long __se_compat_sys_##name(void) \
+#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
+ static long \
+ __se_compat_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__)); \
+ static inline long \
+ __do_compat_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__)); \
+ __IA32_COMPAT_SYS_STUBx(x, compat_sys##name, __VA_ARGS__) \
+ __X32_COMPAT_SYS_STUBx(x, compat_sys##name, __VA_ARGS__) \
+ static long \
+ __se_compat_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__)) \
{ \
- return __do_compat_sys_##name(); \
+ return __do_compat_sys##name(__MAP(x, __SC_DELOUSE, \
+ __VA_ARGS__)); \
} \
- static inline long __do_compat_sys_##name(void)
+ static inline long \
+ __do_compat_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__))
-#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
- static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
- static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
- __IA32_COMPAT_SYS_STUBx(x, name, __VA_ARGS__) \
- __X32_COMPAT_SYS_STUBx(x, name, __VA_ARGS__) \
- static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
- { \
- return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
- } \
- static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
+#define COMPAT_SYSCALL_DEFINE0(name) \
+ SYSCALL_METADATA(_##name, 0); \
+ static inline long __do_compat_sys_##name(void); \
+ __IA32_COMPAT_SYS_STUB0(compat_sys_##name) \
+ __X32_COMPAT_SYS_STUB0(compat_sys_##name) \
+ static inline long __do_compat_sys_##name(void)
/*
* As some compat syscalls may not be implemented, we need to expand
@@ -148,96 +253,16 @@ struct pt_regs;
* kernel/time/posix-stubs.c to cover this case as well.
*/
#define COND_SYSCALL_COMPAT(name) \
- cond_syscall(__ia32_compat_sys_##name); \
- cond_syscall(__x32_compat_sys_##name)
+ __IA32_COMPAT_COND_SYSCALL(compat_sys_##name) \
+ __X32_COMPAT_COND_SYSCALL(compat_sys_##name)
#define COMPAT_SYS_NI(name) \
- SYSCALL_ALIAS(__ia32_compat_sys_##name, sys_ni_posix_timers); \
- SYSCALL_ALIAS(__x32_compat_sys_##name, sys_ni_posix_timers)
+ __IA32_COMPAT_SYS_NI(name) \
+ __X32_COMPAT_SYS_NI(name)
#endif /* CONFIG_COMPAT */
-/*
- * Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
- * struct pt_regs *regs as the only argument of the syscall stub named
- * __x64_sys_*(). It decodes just the registers it needs and passes them on to
- * the __se_sys_*() wrapper performing sign extension and then to the
- * __do_sys_*() function doing the actual job. These wrappers and functions
- * are inlined (at least in very most cases), meaning that the assembly looks
- * as follows (slightly re-ordered for better readability):
- *
- * <__x64_sys_recv>: <-- syscall with 4 parameters
- * callq <__fentry__>
- *
- * mov 0x70(%rdi),%rdi <-- decode regs->di
- * mov 0x68(%rdi),%rsi <-- decode regs->si
- * mov 0x60(%rdi),%rdx <-- decode regs->dx
- * mov 0x38(%rdi),%rcx <-- decode regs->r10
- *
- * xor %r9d,%r9d <-- clear %r9
- * xor %r8d,%r8d <-- clear %r8
- *
- * callq __sys_recvfrom <-- do the actual work in __sys_recvfrom()
- * which takes 6 arguments
- *
- * cltq <-- extend return value to 64-bit
- * retq <-- return
- *
- * This approach avoids leaking random user-provided register content down
- * the call chain.
- *
- * If IA32_EMULATION is enabled, this macro generates an additional wrapper
- * named __ia32_sys_*() which decodes the struct pt_regs *regs according
- * to the i386 calling convention (bx, cx, dx, si, di, bp).
- */
-#define __SYSCALL_DEFINEx(x, name, ...) \
- asmlinkage long __x64_sys##name(const struct pt_regs *regs); \
- ALLOW_ERROR_INJECTION(__x64_sys##name, ERRNO); \
- static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
- static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
- asmlinkage long __x64_sys##name(const struct pt_regs *regs) \
- { \
- return __se_sys##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\
- } \
- __IA32_SYS_STUBx(x, name, __VA_ARGS__) \
- static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
- { \
- long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
- return ret; \
- } \
- static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
-
-/*
- * As the generic SYSCALL_DEFINE0() macro does not decode any parameters for
- * obvious reasons, and passing struct pt_regs *regs to it in %rdi does not
- * hurt, we only need to re-define it here to keep the naming congruent to
- * SYSCALL_DEFINEx() -- which is essential for the COND_SYSCALL() and SYS_NI()
- * macros to work correctly.
- */
-#ifndef SYSCALL_DEFINE0
-#define SYSCALL_DEFINE0(sname) \
- SYSCALL_METADATA(_##sname, 0); \
- asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused);\
- ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \
- asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused)
-#endif
-
-#ifndef COND_SYSCALL
-#define COND_SYSCALL(name) \
- asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \
- { \
- return sys_ni_syscall(); \
- }
-#endif
-
-#ifndef SYS_NI
-#define SYS_NI(name) SYSCALL_ALIAS(__x64_sys_##name, sys_ni_posix_timers);
-#endif
-
-
/*
* For VSYSCALLS, we need to declare these three syscalls with the new
* pt_regs-based calling convention for in-kernel use.
--
2.24.1
^ permalink raw reply related [flat|nested] 17+ messages in thread* Re: [PATCH 1/5] x86: Refactor syscall_wrapper.h
2020-02-21 5:09 ` [PATCH 1/5] x86: Refactor syscall_wrapper.h Brian Gerst
@ 2020-02-21 6:47 ` Dominik Brodowski
2020-02-21 14:05 ` Brian Gerst
0 siblings, 1 reply; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 6:47 UTC (permalink / raw)
To: Brian Gerst
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
H . Peter Anvin, Andy Lutomirski
> + * Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
If you move the description to the top (the reason for that is
understandable), you can't talk about "this macro" any more --
as "this macro" is "__SYSCALL_DEFINEx()" which is defined far further
below.
> + * struct pt_regs *regs as the only argument of the syscall stub named
> + * __x64_sys_*(). It decodes just the registers it needs and passes them on to
> + * the __se_sys_*() wrapper performing sign extension and then to the
> + * __do_sys_*() function doing the actual job. These wrappers and functions
> + * are inlined (at least in very most cases), meaning that the assembly looks
> + * as follows (slightly re-ordered for better readability):
> + *
> + * <__x64_sys_recv>: <-- syscall with 4 parameters
> + * callq <__fentry__>
> + *
> + * mov 0x70(%rdi),%rdi <-- decode regs->di
> + * mov 0x68(%rdi),%rsi <-- decode regs->si
> + * mov 0x60(%rdi),%rdx <-- decode regs->dx
> + * mov 0x38(%rdi),%rcx <-- decode regs->r10
> + *
> + * xor %r9d,%r9d <-- clear %r9
> + * xor %r8d,%r8d <-- clear %r8
> + *
> + * callq __sys_recvfrom <-- do the actual work in __sys_recvfrom()
> + * which takes 6 arguments
> + *
> + * cltq <-- extend return value to 64-bit
> + * retq <-- return
> + *
> + * This approach avoids leaking random user-provided register content down
> + * the call chain.
... maybe add the rationale for x86-32 here (in patch 3/5)?
> + * If IA32_EMULATION is enabled, this macro generates an additional wrapper
> + * named __ia32_sys_*() which decodes the struct pt_regs *regs according
> + * to the i386 calling convention (bx, cx, dx, si, di, bp).
... and this likely needs an update in patch 3/5 as well
> -#define __IA32_COMPAT_SYS_STUBx(x, name, ...) \
> - asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs);\
> - ALLOW_ERROR_INJECTION(__ia32_compat_sys##name, ERRNO); \
> - asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs)\
> +#define __SYS_STUB0(abi, name) \
> + asmlinkage long __##abi##_##name(const struct pt_regs *regs); \
> + ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
> + asmlinkage long __##abi##_##name(const struct pt_regs *regs) \
> { \
> - return __se_compat_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\
> + return __do_##name(); \
> }
Instead of __se_compat_sys##name, now __do_comapt_sys##name is called. This
should be equivalent for zero-argument syscalls, but maybe make that change
explicit.
In general terms, I am not sure that the new code is more readable (but I
may be biased) as the conversion to the proper calling convention for the
ABI has to be done by the callee and is not done in the caller. Also, there
are now three levels of macros instead of two.
> +#ifdef CONFIG_X86_64
> +#define __X64_SYS_STUBx(x, name, ...) \
> + __SYS_STUBx(x64, name, SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__))
s/name/sys_name/g please -- this isn't the name of the syscall any more, but
appended by sys (applies to a number of macros)
> - * named __ia32_sys_*()
> + * As the generic SYSCALL_DEFINE0() macro does not decode any parameters for
> + * obvious reasons, and passing struct pt_regs *regs to it in %rdi does not
> + * hurt, we only need to re-define it here to keep the naming congruent to
> + * SYSCALL_DEFINEx() -- which is essential for the COND_SYSCALL() and SYS_NI()
> + * macros to work correctly.
> */
> +#define SYSCALL_DEFINE0(name) \
> + SYSCALL_METADATA(_##name, 0); \
> + static inline long __do_sys_##name(void); \
> + __X64_SYS_STUB0(sys_##name) \
> + __IA32_SYS_STUB0(sys_##name) \
> + static inline long __do_sys_##name(void)
>
> -#define SYSCALL_DEFINE0(sname) \
> - SYSCALL_METADATA(_##sname, 0); \
> - asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused);\
> - ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \
> - SYSCALL_ALIAS(__ia32_sys_##sname, __x64_sys_##sname); \
> - asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused)
OK, this is a bit more complex change -- you don't use SYSCALL_ALIAS any
more, but define two asmlinakge functions which then call __do_sys_##name().
Maybe needs an explanation in the changelog...
> +#define __IA32_COMPAT_SYS_STUBx(x, name, ...) \
> + __SYS_STUBx(ia32, name, SC_IA32_REGS_TO_ARGS(x, __VA_ARGS__))
s/name/compat_sys_name/g/ -- please make it a bit more explicit what "name"
we are talking about here,
> +#define __IA32_COMPAT_SYS_STUB0(name) \
> + __SYS_STUB0(ia32, name)
and here,
> +#define __IA32_COMPAT_COND_SYSCALL(name) \
> + __COND_SYSCALL(ia32, name)
and here,
> +#define __IA32_COMPAT_SYS_NI(name) \
> + SYSCALL_ALIAS(__ia32_compat_sys_##name, sys_ni_posix_timers)
... but not here, as here "name" is actually "name".
Thanks,
Dominik
^ permalink raw reply [flat|nested] 17+ messages in thread* Re: [PATCH 1/5] x86: Refactor syscall_wrapper.h
2020-02-21 6:47 ` Dominik Brodowski
@ 2020-02-21 14:05 ` Brian Gerst
0 siblings, 0 replies; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 14:05 UTC (permalink / raw)
To: Dominik Brodowski
Cc: Linux Kernel Mailing List, the arch/x86 maintainers,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski
On Fri, Feb 21, 2020 at 2:07 AM Dominik Brodowski
<linux@dominikbrodowski.net> wrote:
>
> > + * Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
>
> If you move the description to the top (the reason for that is
> understandable), you can't talk about "this macro" any more --
> as "this macro" is "__SYSCALL_DEFINEx()" which is defined far further
> below.
>
> > + * struct pt_regs *regs as the only argument of the syscall stub named
> > + * __x64_sys_*(). It decodes just the registers it needs and passes them on to
> > + * the __se_sys_*() wrapper performing sign extension and then to the
> > + * __do_sys_*() function doing the actual job. These wrappers and functions
> > + * are inlined (at least in very most cases), meaning that the assembly looks
> > + * as follows (slightly re-ordered for better readability):
> > + *
> > + * <__x64_sys_recv>: <-- syscall with 4 parameters
> > + * callq <__fentry__>
> > + *
> > + * mov 0x70(%rdi),%rdi <-- decode regs->di
> > + * mov 0x68(%rdi),%rsi <-- decode regs->si
> > + * mov 0x60(%rdi),%rdx <-- decode regs->dx
> > + * mov 0x38(%rdi),%rcx <-- decode regs->r10
> > + *
> > + * xor %r9d,%r9d <-- clear %r9
> > + * xor %r8d,%r8d <-- clear %r8
> > + *
> > + * callq __sys_recvfrom <-- do the actual work in __sys_recvfrom()
> > + * which takes 6 arguments
> > + *
> > + * cltq <-- extend return value to 64-bit
> > + * retq <-- return
> > + *
> > + * This approach avoids leaking random user-provided register content down
> > + * the call chain.
>
> ... maybe add the rationale for x86-32 here (in patch 3/5)?
>
> > + * If IA32_EMULATION is enabled, this macro generates an additional wrapper
> > + * named __ia32_sys_*() which decodes the struct pt_regs *regs according
> > + * to the i386 calling convention (bx, cx, dx, si, di, bp).
>
> ... and this likely needs an update in patch 3/5 as well
I will update that comment section. The code for 32-bit will follow
the same pattern, just with different register names.
> > -#define __IA32_COMPAT_SYS_STUBx(x, name, ...) \
> > - asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs);\
> > - ALLOW_ERROR_INJECTION(__ia32_compat_sys##name, ERRNO); \
> > - asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs)\
> > +#define __SYS_STUB0(abi, name) \
> > + asmlinkage long __##abi##_##name(const struct pt_regs *regs); \
> > + ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
> > + asmlinkage long __##abi##_##name(const struct pt_regs *regs) \
> > { \
> > - return __se_compat_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\
> > + return __do_##name(); \
> > }
>
> Instead of __se_compat_sys##name, now __do_comapt_sys##name is called. This
> should be equivalent for zero-argument syscalls, but maybe make that change
> explicit.
The __se_* layer (sign-extension) is unnecessary when there are no
arguments to extend. But I can make that a separate patch if that
makes it clearer.
> In general terms, I am not sure that the new code is more readable (but I
> may be biased) as the conversion to the proper calling convention for the
> ABI has to be done by the callee and is not done in the caller. Also, there
> are now three levels of macros instead of two.
I added the __STUBx layer to avoid 4 copies of the same boilerplate
code. The middle layer is needed because you can't have #ifdefs
inside a macro.
>
>
> > +#ifdef CONFIG_X86_64
> > +#define __X64_SYS_STUBx(x, name, ...) \
> > + __SYS_STUBx(x64, name, SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__))
>
> s/name/sys_name/g please -- this isn't the name of the syscall any more, but
> appended by sys (applies to a number of macros)
>
> > - * named __ia32_sys_*()
> > + * As the generic SYSCALL_DEFINE0() macro does not decode any parameters for
> > + * obvious reasons, and passing struct pt_regs *regs to it in %rdi does not
> > + * hurt, we only need to re-define it here to keep the naming congruent to
> > + * SYSCALL_DEFINEx() -- which is essential for the COND_SYSCALL() and SYS_NI()
> > + * macros to work correctly.
> > */
> > +#define SYSCALL_DEFINE0(name) \
> > + SYSCALL_METADATA(_##name, 0); \
> > + static inline long __do_sys_##name(void); \
> > + __X64_SYS_STUB0(sys_##name) \
> > + __IA32_SYS_STUB0(sys_##name) \
> > + static inline long __do_sys_##name(void)
> >
> > -#define SYSCALL_DEFINE0(sname) \
> > - SYSCALL_METADATA(_##sname, 0); \
> > - asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused);\
> > - ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \
> > - SYSCALL_ALIAS(__ia32_sys_##sname, __x64_sys_##sname); \
> > - asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused)
>
> OK, this is a bit more complex change -- you don't use SYSCALL_ALIAS any
> more, but define two asmlinakge functions which then call __do_sys_##name().
> Maybe needs an explanation in the changelog...
IIRC this was because in the 32-bit native case the __x64_* variant
wasn't present to alias to. I'll see if I can come up with a
different solution.
> > +#define __IA32_COMPAT_SYS_STUBx(x, name, ...) \
> > + __SYS_STUBx(ia32, name, SC_IA32_REGS_TO_ARGS(x, __VA_ARGS__))
>
> s/name/compat_sys_name/g/ -- please make it a bit more explicit what "name"
> we are talking about here,
>
> > +#define __IA32_COMPAT_SYS_STUB0(name) \
> > + __SYS_STUB0(ia32, name)
>
> and here,
>
> > +#define __IA32_COMPAT_COND_SYSCALL(name) \
> > + __COND_SYSCALL(ia32, name)
>
> and here,
>
> > +#define __IA32_COMPAT_SYS_NI(name) \
> > + SYSCALL_ALIAS(__ia32_compat_sys_##name, sys_ni_posix_timers)
>
> ... but not here, as here "name" is actually "name".
>
> Thanks,
> Dominik
--
Brian Gerst
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH 2/5] x86: Move 32-bit compat syscalls to common location
2020-02-21 5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
2020-02-21 5:09 ` [PATCH 1/5] x86: Refactor syscall_wrapper.h Brian Gerst
@ 2020-02-21 5:09 ` Brian Gerst
2020-02-21 7:07 ` Dominik Brodowski
2020-02-21 5:09 ` [PATCH 3/5] x86-32: Enable syscall wrappers Brian Gerst
` (3 subsequent siblings)
5 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 5:09 UTC (permalink / raw)
To: linux-kernel, x86
Cc: Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski, Brian Gerst
Move the 32-bit wrappers for syscalls that take 64-bit arguments (loff_t)
to a common location so that native 32-bit can use them in preparation for
enabling pt_regs-based syscalls.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/entry/syscalls/syscall_32.tbl | 18 ++--
arch/x86/ia32/Makefile | 2 +-
arch/x86/kernel/Makefile | 2 +
arch/x86/{ia32 => kernel}/sys_ia32.c | 130 ++++++++++++-------------
arch/x86/um/sys_call_table_32.c | 10 ++
5 files changed, 87 insertions(+), 75 deletions(-)
rename arch/x86/{ia32 => kernel}/sys_ia32.c (83%)
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index c17cb77eb150..f06f0d1b1282 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -191,8 +191,8 @@
177 i386 rt_sigtimedwait sys_rt_sigtimedwait_time32 __ia32_compat_sys_rt_sigtimedwait_time32
178 i386 rt_sigqueueinfo sys_rt_sigqueueinfo __ia32_compat_sys_rt_sigqueueinfo
179 i386 rt_sigsuspend sys_rt_sigsuspend __ia32_compat_sys_rt_sigsuspend
-180 i386 pread64 sys_pread64 __ia32_compat_sys_x86_pread
-181 i386 pwrite64 sys_pwrite64 __ia32_compat_sys_x86_pwrite
+180 i386 pread64 sys_x86_pread __ia32_sys_x86_pread
+181 i386 pwrite64 sys_x86_pwrite __ia32_sys_x86_pwrite
182 i386 chown sys_chown16 __ia32_sys_chown16
183 i386 getcwd sys_getcwd __ia32_sys_getcwd
184 i386 capget sys_capget __ia32_sys_capget
@@ -204,8 +204,8 @@
190 i386 vfork sys_vfork __ia32_sys_vfork
191 i386 ugetrlimit sys_getrlimit __ia32_compat_sys_getrlimit
192 i386 mmap2 sys_mmap_pgoff __ia32_sys_mmap_pgoff
-193 i386 truncate64 sys_truncate64 __ia32_compat_sys_x86_truncate64
-194 i386 ftruncate64 sys_ftruncate64 __ia32_compat_sys_x86_ftruncate64
+193 i386 truncate64 sys_x86_truncate64 __ia32_sys_x86_truncate64
+194 i386 ftruncate64 sys_x86_ftruncate64 __ia32_sys_x86_ftruncate64
195 i386 stat64 sys_stat64 __ia32_compat_sys_x86_stat64
196 i386 lstat64 sys_lstat64 __ia32_compat_sys_x86_lstat64
197 i386 fstat64 sys_fstat64 __ia32_compat_sys_x86_fstat64
@@ -236,7 +236,7 @@
# 222 is unused
# 223 is unused
224 i386 gettid sys_gettid __ia32_sys_gettid
-225 i386 readahead sys_readahead __ia32_compat_sys_x86_readahead
+225 i386 readahead sys_x86_readahead __ia32_sys_x86_readahead
226 i386 setxattr sys_setxattr __ia32_sys_setxattr
227 i386 lsetxattr sys_lsetxattr __ia32_sys_lsetxattr
228 i386 fsetxattr sys_fsetxattr __ia32_sys_fsetxattr
@@ -261,7 +261,7 @@
247 i386 io_getevents sys_io_getevents_time32 __ia32_sys_io_getevents_time32
248 i386 io_submit sys_io_submit __ia32_compat_sys_io_submit
249 i386 io_cancel sys_io_cancel __ia32_sys_io_cancel
-250 i386 fadvise64 sys_fadvise64 __ia32_compat_sys_x86_fadvise64
+250 i386 fadvise64 sys_x86_fadvise64 __ia32_sys_x86_fadvise64
# 251 is available for reuse (was briefly sys_set_zone_reclaim)
252 i386 exit_group sys_exit_group __ia32_sys_exit_group
253 i386 lookup_dcookie sys_lookup_dcookie __ia32_compat_sys_lookup_dcookie
@@ -283,7 +283,7 @@
269 i386 fstatfs64 sys_fstatfs64 __ia32_compat_sys_fstatfs64
270 i386 tgkill sys_tgkill __ia32_sys_tgkill
271 i386 utimes sys_utimes_time32 __ia32_sys_utimes_time32
-272 i386 fadvise64_64 sys_fadvise64_64 __ia32_compat_sys_x86_fadvise64_64
+272 i386 fadvise64_64 sys_x86_fadvise64_64 __ia32_sys_x86_fadvise64_64
273 i386 vserver
274 i386 mbind sys_mbind __ia32_sys_mbind
275 i386 get_mempolicy sys_get_mempolicy __ia32_compat_sys_get_mempolicy
@@ -325,7 +325,7 @@
311 i386 set_robust_list sys_set_robust_list __ia32_compat_sys_set_robust_list
312 i386 get_robust_list sys_get_robust_list __ia32_compat_sys_get_robust_list
313 i386 splice sys_splice __ia32_sys_splice
-314 i386 sync_file_range sys_sync_file_range __ia32_compat_sys_x86_sync_file_range
+314 i386 sync_file_range sys_x86_sync_file_range __ia32_sys_x86_sync_file_range
315 i386 tee sys_tee __ia32_sys_tee
316 i386 vmsplice sys_vmsplice __ia32_compat_sys_vmsplice
317 i386 move_pages sys_move_pages __ia32_compat_sys_move_pages
@@ -335,7 +335,7 @@
321 i386 signalfd sys_signalfd __ia32_compat_sys_signalfd
322 i386 timerfd_create sys_timerfd_create __ia32_sys_timerfd_create
323 i386 eventfd sys_eventfd __ia32_sys_eventfd
-324 i386 fallocate sys_fallocate __ia32_compat_sys_x86_fallocate
+324 i386 fallocate sys_x86_fallocate __ia32_sys_x86_fallocate
325 i386 timerfd_settime sys_timerfd_settime32 __ia32_sys_timerfd_settime32
326 i386 timerfd_gettime sys_timerfd_gettime32 __ia32_sys_timerfd_gettime32
327 i386 signalfd4 sys_signalfd4 __ia32_compat_sys_signalfd4
diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
index d13b352b2aa7..8e4d0391ff6c 100644
--- a/arch/x86/ia32/Makefile
+++ b/arch/x86/ia32/Makefile
@@ -3,7 +3,7 @@
# Makefile for the ia32 kernel emulation subsystem.
#
-obj-$(CONFIG_IA32_EMULATION) := sys_ia32.o ia32_signal.o
+obj-$(CONFIG_IA32_EMULATION) := ia32_signal.o
obj-$(CONFIG_IA32_AOUT) += ia32_aout.o
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 70615591a265..3f6d611fce08 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -57,6 +57,8 @@ obj-y += setup.o x86_init.o i8259.o irqinit.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-y += probe_roms.o
+obj-$(CONFIG_X86_32) += sys_ia32.o
+obj-$(CONFIG_IA32_EMULATION) += sys_ia32.o
obj-$(CONFIG_X86_64) += sys_x86_64.o
obj-$(CONFIG_X86_ESPFIX64) += espfix_64.o
obj-$(CONFIG_SYSFS) += ksysfs.o
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/kernel/sys_ia32.c
similarity index 83%
rename from arch/x86/ia32/sys_ia32.c
rename to arch/x86/kernel/sys_ia32.c
index 21790307121e..bc1359d2b8e6 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/kernel/sys_ia32.c
@@ -51,20 +51,79 @@
#define AA(__x) ((unsigned long)(__x))
-
-COMPAT_SYSCALL_DEFINE3(x86_truncate64, const char __user *, filename,
- unsigned long, offset_low, unsigned long, offset_high)
+SYSCALL_DEFINE3(x86_truncate64, const char __user *, filename,
+ unsigned long, offset_low, unsigned long, offset_high)
{
return ksys_truncate(filename,
((loff_t) offset_high << 32) | offset_low);
}
-COMPAT_SYSCALL_DEFINE3(x86_ftruncate64, unsigned int, fd,
- unsigned long, offset_low, unsigned long, offset_high)
+SYSCALL_DEFINE3(x86_ftruncate64, unsigned int, fd,
+ unsigned long, offset_low, unsigned long, offset_high)
{
return ksys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
}
+/* warning: next two assume little endian */
+SYSCALL_DEFINE5(x86_pread, unsigned int, fd, char __user *, ubuf,
+ u32, count, u32, poslo, u32, poshi)
+{
+ return ksys_pread64(fd, ubuf, count,
+ ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+SYSCALL_DEFINE5(x86_pwrite, unsigned int, fd, const char __user *, ubuf,
+ u32, count, u32, poslo, u32, poshi)
+{
+ return ksys_pwrite64(fd, ubuf, count,
+ ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+/*
+ * Some system calls that need sign extended arguments. This could be
+ * done by a generic wrapper.
+ */
+SYSCALL_DEFINE6(x86_fadvise64_64, int, fd, __u32, offset_low,
+ __u32, offset_high, __u32, len_low, __u32, len_high,
+ int, advice)
+{
+ return ksys_fadvise64_64(fd,
+ (((u64)offset_high)<<32) | offset_low,
+ (((u64)len_high)<<32) | len_low,
+ advice);
+}
+
+SYSCALL_DEFINE4(x86_readahead, int, fd, unsigned int, off_lo,
+ unsigned int, off_hi, size_t, count)
+{
+ return ksys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
+}
+
+SYSCALL_DEFINE6(x86_sync_file_range, int, fd, unsigned int, off_low,
+ unsigned int, off_hi, unsigned int, n_low,
+ unsigned int, n_hi, int, flags)
+{
+ return ksys_sync_file_range(fd,
+ ((u64)off_hi << 32) | off_low,
+ ((u64)n_hi << 32) | n_low, flags);
+}
+
+SYSCALL_DEFINE5(x86_fadvise64, int, fd, unsigned int, offset_lo,
+ unsigned int, offset_hi, size_t, len, int, advice)
+{
+ return ksys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
+ len, advice);
+}
+
+SYSCALL_DEFINE6(x86_fallocate, int, fd, int, mode,
+ unsigned int, offset_lo, unsigned int, offset_hi,
+ unsigned int, len_lo, unsigned int, len_hi)
+{
+ return ksys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
+ ((u64)len_hi << 32) | len_lo);
+}
+
+#ifdef CONFIG_IA32_EMULATION
/*
* Another set for IA32/LFS -- x86_64 struct stat is different due to
* support for 64bit inode numbers.
@@ -170,66 +229,6 @@ COMPAT_SYSCALL_DEFINE1(x86_mmap, struct mmap_arg_struct32 __user *, arg)
a.offset>>PAGE_SHIFT);
}
-/* warning: next two assume little endian */
-COMPAT_SYSCALL_DEFINE5(x86_pread, unsigned int, fd, char __user *, ubuf,
- u32, count, u32, poslo, u32, poshi)
-{
- return ksys_pread64(fd, ubuf, count,
- ((loff_t)AA(poshi) << 32) | AA(poslo));
-}
-
-COMPAT_SYSCALL_DEFINE5(x86_pwrite, unsigned int, fd, const char __user *, ubuf,
- u32, count, u32, poslo, u32, poshi)
-{
- return ksys_pwrite64(fd, ubuf, count,
- ((loff_t)AA(poshi) << 32) | AA(poslo));
-}
-
-
-/*
- * Some system calls that need sign extended arguments. This could be
- * done by a generic wrapper.
- */
-COMPAT_SYSCALL_DEFINE6(x86_fadvise64_64, int, fd, __u32, offset_low,
- __u32, offset_high, __u32, len_low, __u32, len_high,
- int, advice)
-{
- return ksys_fadvise64_64(fd,
- (((u64)offset_high)<<32) | offset_low,
- (((u64)len_high)<<32) | len_low,
- advice);
-}
-
-COMPAT_SYSCALL_DEFINE4(x86_readahead, int, fd, unsigned int, off_lo,
- unsigned int, off_hi, size_t, count)
-{
- return ksys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
-}
-
-COMPAT_SYSCALL_DEFINE6(x86_sync_file_range, int, fd, unsigned int, off_low,
- unsigned int, off_hi, unsigned int, n_low,
- unsigned int, n_hi, int, flags)
-{
- return ksys_sync_file_range(fd,
- ((u64)off_hi << 32) | off_low,
- ((u64)n_hi << 32) | n_low, flags);
-}
-
-COMPAT_SYSCALL_DEFINE5(x86_fadvise64, int, fd, unsigned int, offset_lo,
- unsigned int, offset_hi, size_t, len, int, advice)
-{
- return ksys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
- len, advice);
-}
-
-COMPAT_SYSCALL_DEFINE6(x86_fallocate, int, fd, int, mode,
- unsigned int, offset_lo, unsigned int, offset_hi,
- unsigned int, len_lo, unsigned int, len_hi)
-{
- return ksys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
- ((u64)len_hi << 32) | len_lo);
-}
-
/*
* The 32-bit clone ABI is CONFIG_CLONE_BACKWARDS
*/
@@ -252,3 +251,4 @@ COMPAT_SYSCALL_DEFINE5(x86_clone, unsigned long, clone_flags,
return _do_fork(&args);
}
+#endif /* CONFIG_IA32_EMULATION */
diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c
index 9649b5ad2ca2..d5520e92f89d 100644
--- a/arch/x86/um/sys_call_table_32.c
+++ b/arch/x86/um/sys_call_table_32.c
@@ -26,6 +26,16 @@
#define old_mmap sys_old_mmap
+#define sys_x86_pread sys_pread64
+#define sys_x86_pwrite sys_pwrite64
+#define sys_x86_truncate64 sys_truncate64
+#define sys_x86_ftruncate64 sys_ftruncate64
+#define sys_x86_readahead sys_readahead
+#define sys_x86_fadvise64 sys_fadvise64
+#define sys_x86_fadvise64_64 sys_fadvise64_64
+#define sys_x86_sync_file_range sys_sync_file_range
+#define sys_x86_fallocate sys_fallocate
+
#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
#include <asm/syscalls_32.h>
--
2.24.1
^ permalink raw reply related [flat|nested] 17+ messages in thread* Re: [PATCH 2/5] x86: Move 32-bit compat syscalls to common location
2020-02-21 5:09 ` [PATCH 2/5] x86: Move 32-bit compat syscalls to common location Brian Gerst
@ 2020-02-21 7:07 ` Dominik Brodowski
2020-02-21 13:41 ` Brian Gerst
0 siblings, 1 reply; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 7:07 UTC (permalink / raw)
To: Brian Gerst
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
H . Peter Anvin, Andy Lutomirski
On Fri, Feb 21, 2020 at 12:09:31AM -0500, Brian Gerst wrote:
> --- a/arch/x86/kernel/Makefile
> +++ b/arch/x86/kernel/Makefile
> @@ -57,6 +57,8 @@ obj-y += setup.o x86_init.o i8259.o irqinit.o
> obj-$(CONFIG_JUMP_LABEL) += jump_label.o
> obj-$(CONFIG_IRQ_WORK) += irq_work.o
> obj-y += probe_roms.o
> +obj-$(CONFIG_X86_32) += sys_ia32.o
> +obj-$(CONFIG_IA32_EMULATION) += sys_ia32.o
That doesn't look nicely...
Other than that, the patch looks trivial enough.
Thanks,
Dominik
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 2/5] x86: Move 32-bit compat syscalls to common location
2020-02-21 7:07 ` Dominik Brodowski
@ 2020-02-21 13:41 ` Brian Gerst
2020-02-21 15:29 ` Dominik Brodowski
0 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 13:41 UTC (permalink / raw)
To: Dominik Brodowski
Cc: Linux Kernel Mailing List, the arch/x86 maintainers,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski
On Fri, Feb 21, 2020 at 2:07 AM Dominik Brodowski
<linux@dominikbrodowski.net> wrote:
>
> On Fri, Feb 21, 2020 at 12:09:31AM -0500, Brian Gerst wrote:
> > --- a/arch/x86/kernel/Makefile
> > +++ b/arch/x86/kernel/Makefile
> > @@ -57,6 +57,8 @@ obj-y += setup.o x86_init.o i8259.o irqinit.o
> > obj-$(CONFIG_JUMP_LABEL) += jump_label.o
> > obj-$(CONFIG_IRQ_WORK) += irq_work.o
> > obj-y += probe_roms.o
> > +obj-$(CONFIG_X86_32) += sys_ia32.o
> > +obj-$(CONFIG_IA32_EMULATION) += sys_ia32.o
>
> That doesn't look nicely...
Do you have a better suggestion? That's similar to how tls.o is
already handled.
--
Brian Gerst
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 2/5] x86: Move 32-bit compat syscalls to common location
2020-02-21 13:41 ` Brian Gerst
@ 2020-02-21 15:29 ` Dominik Brodowski
0 siblings, 0 replies; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 15:29 UTC (permalink / raw)
To: Brian Gerst
Cc: Linux Kernel Mailing List, the arch/x86 maintainers,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski
On Fri, Feb 21, 2020 at 08:41:23AM -0500, Brian Gerst wrote:
> On Fri, Feb 21, 2020 at 2:07 AM Dominik Brodowski
> <linux@dominikbrodowski.net> wrote:
> >
> > On Fri, Feb 21, 2020 at 12:09:31AM -0500, Brian Gerst wrote:
> > > --- a/arch/x86/kernel/Makefile
> > > +++ b/arch/x86/kernel/Makefile
> > > @@ -57,6 +57,8 @@ obj-y += setup.o x86_init.o i8259.o irqinit.o
> > > obj-$(CONFIG_JUMP_LABEL) += jump_label.o
> > > obj-$(CONFIG_IRQ_WORK) += irq_work.o
> > > obj-y += probe_roms.o
> > > +obj-$(CONFIG_X86_32) += sys_ia32.o
> > > +obj-$(CONFIG_IA32_EMULATION) += sys_ia32.o
> >
> > That doesn't look nicely...
>
> Do you have a better suggestion? That's similar to how tls.o is
> already handled.
Besides modifying Kconfig? No, unfortunately not.
Thanks,
Dominik
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH 3/5] x86-32: Enable syscall wrappers
2020-02-21 5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
2020-02-21 5:09 ` [PATCH 1/5] x86: Refactor syscall_wrapper.h Brian Gerst
2020-02-21 5:09 ` [PATCH 2/5] x86: Move 32-bit compat syscalls to common location Brian Gerst
@ 2020-02-21 5:09 ` Brian Gerst
2020-02-21 7:05 ` Dominik Brodowski
2020-02-21 5:09 ` [PATCH 4/5] x86-64: Use syscall wrappers for x32_rt_sigreturn Brian Gerst
` (2 subsequent siblings)
5 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 5:09 UTC (permalink / raw)
To: linux-kernel, x86
Cc: Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski, Brian Gerst
Enable pt_regs based syscalls for 32-bit.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/Kconfig | 2 +-
arch/x86/entry/common.c | 20 +-
arch/x86/entry/syscall_32.c | 11 +-
arch/x86/entry/syscall_64.c | 7 -
arch/x86/entry/syscalls/syscall_32.tbl | 818 ++++++++++++-------------
arch/x86/entry/syscalls/syscalltbl.sh | 33 +-
arch/x86/include/asm/syscall.h | 6 -
arch/x86/include/asm/syscall_wrapper.h | 3 +
arch/x86/include/asm/syscalls.h | 29 -
9 files changed, 442 insertions(+), 487 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7f65ee880463..d1c1920f2a55 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -30,7 +30,6 @@ config X86_64
select MODULES_USE_ELF_RELA
select NEED_DMA_MAP_STATE
select SWIOTLB
- select ARCH_HAS_SYSCALL_WRAPPER
config FORCE_DYNAMIC_FTRACE
def_bool y
@@ -79,6 +78,7 @@ config X86
select ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_HAS_STRICT_MODULE_RWX
select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE
+ select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index ec167d8c41cb..91689fd7a5e8 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -334,20 +334,7 @@ static __always_inline void do_syscall_32_irqs_on(struct pt_regs *regs)
if (likely(nr < IA32_NR_syscalls)) {
nr = array_index_nospec(nr, IA32_NR_syscalls);
-#ifdef CONFIG_IA32_EMULATION
regs->ax = ia32_sys_call_table[nr](regs);
-#else
- /*
- * It's possible that a 32-bit syscall implementation
- * takes a 64-bit parameter but nonetheless assumes that
- * the high bits are zero. Make sure we zero-extend all
- * of the args.
- */
- regs->ax = ia32_sys_call_table[nr](
- (unsigned int)regs->bx, (unsigned int)regs->cx,
- (unsigned int)regs->dx, (unsigned int)regs->si,
- (unsigned int)regs->di, (unsigned int)regs->bp);
-#endif /* CONFIG_IA32_EMULATION */
}
syscall_return_slowpath(regs);
@@ -439,3 +426,10 @@ __visible long do_fast_syscall_32(struct pt_regs *regs)
#endif
}
#endif
+
+extern asmlinkage long sys_ni_syscall(void);
+
+SYSCALL_DEFINE0(ni_syscall)
+{
+ return sys_ni_syscall();
+}
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c
index 7d17b3addbbb..7af944b686ef 100644
--- a/arch/x86/entry/syscall_32.c
+++ b/arch/x86/entry/syscall_32.c
@@ -4,18 +4,11 @@
#include <linux/linkage.h>
#include <linux/sys.h>
#include <linux/cache.h>
+#include <linux/syscalls.h>
#include <asm/asm-offsets.h>
#include <asm/syscall.h>
-#ifdef CONFIG_IA32_EMULATION
-/* On X86_64, we use struct pt_regs * to pass parameters to syscalls */
#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
-#define __sys_ni_syscall __ia32_sys_ni_syscall
-#else /* CONFIG_IA32_EMULATION */
-#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
-extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
-#define __sys_ni_syscall sys_ni_syscall
-#endif /* CONFIG_IA32_EMULATION */
#include <asm/syscalls_32.h>
#undef __SYSCALL_I386
@@ -27,6 +20,6 @@ __visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] =
* Smells like a compiler bug -- it doesn't work
* when the & below is removed.
*/
- [0 ... __NR_syscall_compat_max] = &__sys_ni_syscall,
+ [0 ... __NR_syscall_compat_max] = &__ia32_sys_ni_syscall,
#include <asm/syscalls_32.h>
};
diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index adf619a856e8..058dc1b73e96 100644
--- a/arch/x86/entry/syscall_64.c
+++ b/arch/x86/entry/syscall_64.c
@@ -8,13 +8,6 @@
#include <asm/asm-offsets.h>
#include <asm/syscall.h>
-extern asmlinkage long sys_ni_syscall(void);
-
-SYSCALL_DEFINE0(ni_syscall)
-{
- return sys_ni_syscall();
-}
-
#define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
#define __SYSCALL_X32(nr, sym, qual) __SYSCALL_64(nr, sym, qual)
#include <asm/syscalls_64.h>
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index f06f0d1b1282..07313a5b27e7 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -11,434 +11,434 @@
#
# The abi is always "i386" for this file.
#
-0 i386 restart_syscall sys_restart_syscall __ia32_sys_restart_syscall
-1 i386 exit sys_exit __ia32_sys_exit
-2 i386 fork sys_fork __ia32_sys_fork
-3 i386 read sys_read __ia32_sys_read
-4 i386 write sys_write __ia32_sys_write
-5 i386 open sys_open __ia32_compat_sys_open
-6 i386 close sys_close __ia32_sys_close
-7 i386 waitpid sys_waitpid __ia32_sys_waitpid
-8 i386 creat sys_creat __ia32_sys_creat
-9 i386 link sys_link __ia32_sys_link
-10 i386 unlink sys_unlink __ia32_sys_unlink
-11 i386 execve sys_execve __ia32_compat_sys_execve
-12 i386 chdir sys_chdir __ia32_sys_chdir
-13 i386 time sys_time32 __ia32_sys_time32
-14 i386 mknod sys_mknod __ia32_sys_mknod
-15 i386 chmod sys_chmod __ia32_sys_chmod
-16 i386 lchown sys_lchown16 __ia32_sys_lchown16
+0 i386 restart_syscall __ia32_sys_restart_syscall
+1 i386 exit __ia32_sys_exit
+2 i386 fork __ia32_sys_fork
+3 i386 read __ia32_sys_read
+4 i386 write __ia32_sys_write
+5 i386 open __ia32_sys_open __ia32_compat_sys_open
+6 i386 close __ia32_sys_close
+7 i386 waitpid __ia32_sys_waitpid
+8 i386 creat __ia32_sys_creat
+9 i386 link __ia32_sys_link
+10 i386 unlink __ia32_sys_unlink
+11 i386 execve __ia32_sys_execve __ia32_compat_sys_execve
+12 i386 chdir __ia32_sys_chdir
+13 i386 time __ia32_sys_time32
+14 i386 mknod __ia32_sys_mknod
+15 i386 chmod __ia32_sys_chmod
+16 i386 lchown __ia32_sys_lchown16
17 i386 break
-18 i386 oldstat sys_stat __ia32_sys_stat
-19 i386 lseek sys_lseek __ia32_compat_sys_lseek
-20 i386 getpid sys_getpid __ia32_sys_getpid
-21 i386 mount sys_mount __ia32_compat_sys_mount
-22 i386 umount sys_oldumount __ia32_sys_oldumount
-23 i386 setuid sys_setuid16 __ia32_sys_setuid16
-24 i386 getuid sys_getuid16 __ia32_sys_getuid16
-25 i386 stime sys_stime32 __ia32_sys_stime32
-26 i386 ptrace sys_ptrace __ia32_compat_sys_ptrace
-27 i386 alarm sys_alarm __ia32_sys_alarm
-28 i386 oldfstat sys_fstat __ia32_sys_fstat
-29 i386 pause sys_pause __ia32_sys_pause
-30 i386 utime sys_utime32 __ia32_sys_utime32
+18 i386 oldstat __ia32_sys_stat
+19 i386 lseek __ia32_sys_lseek __ia32_compat_sys_lseek
+20 i386 getpid __ia32_sys_getpid
+21 i386 mount __ia32_sys_mount __ia32_compat_sys_mount
+22 i386 umount __ia32_sys_oldumount
+23 i386 setuid __ia32_sys_setuid16
+24 i386 getuid __ia32_sys_getuid16
+25 i386 stime __ia32_sys_stime32
+26 i386 ptrace __ia32_sys_ptrace __ia32_compat_sys_ptrace
+27 i386 alarm __ia32_sys_alarm
+28 i386 oldfstat __ia32_sys_fstat
+29 i386 pause __ia32_sys_pause
+30 i386 utime __ia32_sys_utime32
31 i386 stty
32 i386 gtty
-33 i386 access sys_access __ia32_sys_access
-34 i386 nice sys_nice __ia32_sys_nice
+33 i386 access __ia32_sys_access
+34 i386 nice __ia32_sys_nice
35 i386 ftime
-36 i386 sync sys_sync __ia32_sys_sync
-37 i386 kill sys_kill __ia32_sys_kill
-38 i386 rename sys_rename __ia32_sys_rename
-39 i386 mkdir sys_mkdir __ia32_sys_mkdir
-40 i386 rmdir sys_rmdir __ia32_sys_rmdir
-41 i386 dup sys_dup __ia32_sys_dup
-42 i386 pipe sys_pipe __ia32_sys_pipe
-43 i386 times sys_times __ia32_compat_sys_times
+36 i386 sync __ia32_sys_sync
+37 i386 kill __ia32_sys_kill
+38 i386 rename __ia32_sys_rename
+39 i386 mkdir __ia32_sys_mkdir
+40 i386 rmdir __ia32_sys_rmdir
+41 i386 dup __ia32_sys_dup
+42 i386 pipe __ia32_sys_pipe
+43 i386 times __ia32_sys_times __ia32_compat_sys_times
44 i386 prof
-45 i386 brk sys_brk __ia32_sys_brk
-46 i386 setgid sys_setgid16 __ia32_sys_setgid16
-47 i386 getgid sys_getgid16 __ia32_sys_getgid16
-48 i386 signal sys_signal __ia32_sys_signal
-49 i386 geteuid sys_geteuid16 __ia32_sys_geteuid16
-50 i386 getegid sys_getegid16 __ia32_sys_getegid16
-51 i386 acct sys_acct __ia32_sys_acct
-52 i386 umount2 sys_umount __ia32_sys_umount
+45 i386 brk __ia32_sys_brk
+46 i386 setgid __ia32_sys_setgid16
+47 i386 getgid __ia32_sys_getgid16
+48 i386 signal __ia32_sys_signal
+49 i386 geteuid __ia32_sys_geteuid16
+50 i386 getegid __ia32_sys_getegid16
+51 i386 acct __ia32_sys_acct
+52 i386 umount2 __ia32_sys_umount
53 i386 lock
-54 i386 ioctl sys_ioctl __ia32_compat_sys_ioctl
-55 i386 fcntl sys_fcntl __ia32_compat_sys_fcntl64
+54 i386 ioctl __ia32_sys_ioctl __ia32_compat_sys_ioctl
+55 i386 fcntl __ia32_sys_fcntl __ia32_compat_sys_fcntl64
56 i386 mpx
-57 i386 setpgid sys_setpgid __ia32_sys_setpgid
+57 i386 setpgid __ia32_sys_setpgid
58 i386 ulimit
-59 i386 oldolduname sys_olduname __ia32_sys_olduname
-60 i386 umask sys_umask __ia32_sys_umask
-61 i386 chroot sys_chroot __ia32_sys_chroot
-62 i386 ustat sys_ustat __ia32_compat_sys_ustat
-63 i386 dup2 sys_dup2 __ia32_sys_dup2
-64 i386 getppid sys_getppid __ia32_sys_getppid
-65 i386 getpgrp sys_getpgrp __ia32_sys_getpgrp
-66 i386 setsid sys_setsid __ia32_sys_setsid
-67 i386 sigaction sys_sigaction __ia32_compat_sys_sigaction
-68 i386 sgetmask sys_sgetmask __ia32_sys_sgetmask
-69 i386 ssetmask sys_ssetmask __ia32_sys_ssetmask
-70 i386 setreuid sys_setreuid16 __ia32_sys_setreuid16
-71 i386 setregid sys_setregid16 __ia32_sys_setregid16
-72 i386 sigsuspend sys_sigsuspend __ia32_sys_sigsuspend
-73 i386 sigpending sys_sigpending __ia32_compat_sys_sigpending
-74 i386 sethostname sys_sethostname __ia32_sys_sethostname
-75 i386 setrlimit sys_setrlimit __ia32_compat_sys_setrlimit
-76 i386 getrlimit sys_old_getrlimit __ia32_compat_sys_old_getrlimit
-77 i386 getrusage sys_getrusage __ia32_compat_sys_getrusage
-78 i386 gettimeofday sys_gettimeofday __ia32_compat_sys_gettimeofday
-79 i386 settimeofday sys_settimeofday __ia32_compat_sys_settimeofday
-80 i386 getgroups sys_getgroups16 __ia32_sys_getgroups16
-81 i386 setgroups sys_setgroups16 __ia32_sys_setgroups16
-82 i386 select sys_old_select __ia32_compat_sys_old_select
-83 i386 symlink sys_symlink __ia32_sys_symlink
-84 i386 oldlstat sys_lstat __ia32_sys_lstat
-85 i386 readlink sys_readlink __ia32_sys_readlink
-86 i386 uselib sys_uselib __ia32_sys_uselib
-87 i386 swapon sys_swapon __ia32_sys_swapon
-88 i386 reboot sys_reboot __ia32_sys_reboot
-89 i386 readdir sys_old_readdir __ia32_compat_sys_old_readdir
-90 i386 mmap sys_old_mmap __ia32_compat_sys_x86_mmap
-91 i386 munmap sys_munmap __ia32_sys_munmap
-92 i386 truncate sys_truncate __ia32_compat_sys_truncate
-93 i386 ftruncate sys_ftruncate __ia32_compat_sys_ftruncate
-94 i386 fchmod sys_fchmod __ia32_sys_fchmod
-95 i386 fchown sys_fchown16 __ia32_sys_fchown16
-96 i386 getpriority sys_getpriority __ia32_sys_getpriority
-97 i386 setpriority sys_setpriority __ia32_sys_setpriority
+59 i386 oldolduname __ia32_sys_olduname
+60 i386 umask __ia32_sys_umask
+61 i386 chroot __ia32_sys_chroot
+62 i386 ustat __ia32_sys_ustat __ia32_compat_sys_ustat
+63 i386 dup2 __ia32_sys_dup2
+64 i386 getppid __ia32_sys_getppid
+65 i386 getpgrp __ia32_sys_getpgrp
+66 i386 setsid __ia32_sys_setsid
+67 i386 sigaction __ia32_sys_sigaction __ia32_compat_sys_sigaction
+68 i386 sgetmask __ia32_sys_sgetmask
+69 i386 ssetmask __ia32_sys_ssetmask
+70 i386 setreuid __ia32_sys_setreuid16
+71 i386 setregid __ia32_sys_setregid16
+72 i386 sigsuspend __ia32_sys_sigsuspend
+73 i386 sigpending __ia32_sys_sigpending __ia32_compat_sys_sigpending
+74 i386 sethostname __ia32_sys_sethostname
+75 i386 setrlimit __ia32_sys_setrlimit __ia32_compat_sys_setrlimit
+76 i386 getrlimit __ia32_sys_old_getrlimit __ia32_compat_sys_old_getrlimit
+77 i386 getrusage __ia32_sys_getrusage __ia32_compat_sys_getrusage
+78 i386 gettimeofday __ia32_sys_gettimeofday __ia32_compat_sys_gettimeofday
+79 i386 settimeofday __ia32_sys_settimeofday __ia32_compat_sys_settimeofday
+80 i386 getgroups __ia32_sys_getgroups16
+81 i386 setgroups __ia32_sys_setgroups16
+82 i386 select __ia32_sys_old_select __ia32_compat_sys_old_select
+83 i386 symlink __ia32_sys_symlink
+84 i386 oldlstat __ia32_sys_lstat
+85 i386 readlink __ia32_sys_readlink
+86 i386 uselib __ia32_sys_uselib
+87 i386 swapon __ia32_sys_swapon
+88 i386 reboot __ia32_sys_reboot
+89 i386 readdir __ia32_sys_old_readdir __ia32_compat_sys_old_readdir
+90 i386 mmap __ia32_sys_old_mmap __ia32_compat_sys_x86_mmap
+91 i386 munmap __ia32_sys_munmap
+92 i386 truncate __ia32_sys_truncate __ia32_compat_sys_truncate
+93 i386 ftruncate __ia32_sys_ftruncate __ia32_compat_sys_ftruncate
+94 i386 fchmod __ia32_sys_fchmod
+95 i386 fchown __ia32_sys_fchown16
+96 i386 getpriority __ia32_sys_getpriority
+97 i386 setpriority __ia32_sys_setpriority
98 i386 profil
-99 i386 statfs sys_statfs __ia32_compat_sys_statfs
-100 i386 fstatfs sys_fstatfs __ia32_compat_sys_fstatfs
-101 i386 ioperm sys_ioperm __ia32_sys_ioperm
-102 i386 socketcall sys_socketcall __ia32_compat_sys_socketcall
-103 i386 syslog sys_syslog __ia32_sys_syslog
-104 i386 setitimer sys_setitimer __ia32_compat_sys_setitimer
-105 i386 getitimer sys_getitimer __ia32_compat_sys_getitimer
-106 i386 stat sys_newstat __ia32_compat_sys_newstat
-107 i386 lstat sys_newlstat __ia32_compat_sys_newlstat
-108 i386 fstat sys_newfstat __ia32_compat_sys_newfstat
-109 i386 olduname sys_uname __ia32_sys_uname
-110 i386 iopl sys_iopl __ia32_sys_iopl
-111 i386 vhangup sys_vhangup __ia32_sys_vhangup
+99 i386 statfs __ia32_sys_statfs __ia32_compat_sys_statfs
+100 i386 fstatfs __ia32_sys_fstatfs __ia32_compat_sys_fstatfs
+101 i386 ioperm __ia32_sys_ioperm
+102 i386 socketcall __ia32_sys_socketcall __ia32_compat_sys_socketcall
+103 i386 syslog __ia32_sys_syslog
+104 i386 setitimer __ia32_sys_setitimer __ia32_compat_sys_setitimer
+105 i386 getitimer __ia32_sys_getitimer __ia32_compat_sys_getitimer
+106 i386 stat __ia32_sys_newstat __ia32_compat_sys_newstat
+107 i386 lstat __ia32_sys_newlstat __ia32_compat_sys_newlstat
+108 i386 fstat __ia32_sys_newfstat __ia32_compat_sys_newfstat
+109 i386 olduname __ia32_sys_uname
+110 i386 iopl __ia32_sys_iopl
+111 i386 vhangup __ia32_sys_vhangup
112 i386 idle
-113 i386 vm86old sys_vm86old __ia32_sys_ni_syscall
-114 i386 wait4 sys_wait4 __ia32_compat_sys_wait4
-115 i386 swapoff sys_swapoff __ia32_sys_swapoff
-116 i386 sysinfo sys_sysinfo __ia32_compat_sys_sysinfo
-117 i386 ipc sys_ipc __ia32_compat_sys_ipc
-118 i386 fsync sys_fsync __ia32_sys_fsync
-119 i386 sigreturn sys_sigreturn __ia32_compat_sys_sigreturn
-120 i386 clone sys_clone __ia32_compat_sys_x86_clone
-121 i386 setdomainname sys_setdomainname __ia32_sys_setdomainname
-122 i386 uname sys_newuname __ia32_sys_newuname
-123 i386 modify_ldt sys_modify_ldt __ia32_sys_modify_ldt
-124 i386 adjtimex sys_adjtimex_time32 __ia32_sys_adjtimex_time32
-125 i386 mprotect sys_mprotect __ia32_sys_mprotect
-126 i386 sigprocmask sys_sigprocmask __ia32_compat_sys_sigprocmask
+113 i386 vm86old __ia32_sys_vm86old __ia32_sys_ni_syscall
+114 i386 wait4 __ia32_sys_wait4 __ia32_compat_sys_wait4
+115 i386 swapoff __ia32_sys_swapoff
+116 i386 sysinfo __ia32_sys_sysinfo __ia32_compat_sys_sysinfo
+117 i386 ipc __ia32_sys_ipc __ia32_compat_sys_ipc
+118 i386 fsync __ia32_sys_fsync
+119 i386 sigreturn __ia32_sys_sigreturn __ia32_compat_sys_sigreturn
+120 i386 clone __ia32_sys_clone __ia32_compat_sys_x86_clone
+121 i386 setdomainname __ia32_sys_setdomainname
+122 i386 uname __ia32_sys_newuname
+123 i386 modify_ldt __ia32_sys_modify_ldt
+124 i386 adjtimex __ia32_sys_adjtimex_time32
+125 i386 mprotect __ia32_sys_mprotect
+126 i386 sigprocmask __ia32_sys_sigprocmask __ia32_compat_sys_sigprocmask
127 i386 create_module
-128 i386 init_module sys_init_module __ia32_sys_init_module
-129 i386 delete_module sys_delete_module __ia32_sys_delete_module
+128 i386 init_module __ia32_sys_init_module
+129 i386 delete_module __ia32_sys_delete_module
130 i386 get_kernel_syms
-131 i386 quotactl sys_quotactl __ia32_compat_sys_quotactl32
-132 i386 getpgid sys_getpgid __ia32_sys_getpgid
-133 i386 fchdir sys_fchdir __ia32_sys_fchdir
-134 i386 bdflush sys_bdflush __ia32_sys_bdflush
-135 i386 sysfs sys_sysfs __ia32_sys_sysfs
-136 i386 personality sys_personality __ia32_sys_personality
+131 i386 quotactl __ia32_sys_quotactl __ia32_compat_sys_quotactl32
+132 i386 getpgid __ia32_sys_getpgid
+133 i386 fchdir __ia32_sys_fchdir
+134 i386 bdflush __ia32_sys_bdflush
+135 i386 sysfs __ia32_sys_sysfs
+136 i386 personality __ia32_sys_personality
137 i386 afs_syscall
-138 i386 setfsuid sys_setfsuid16 __ia32_sys_setfsuid16
-139 i386 setfsgid sys_setfsgid16 __ia32_sys_setfsgid16
-140 i386 _llseek sys_llseek __ia32_sys_llseek
-141 i386 getdents sys_getdents __ia32_compat_sys_getdents
-142 i386 _newselect sys_select __ia32_compat_sys_select
-143 i386 flock sys_flock __ia32_sys_flock
-144 i386 msync sys_msync __ia32_sys_msync
-145 i386 readv sys_readv __ia32_compat_sys_readv
-146 i386 writev sys_writev __ia32_compat_sys_writev
-147 i386 getsid sys_getsid __ia32_sys_getsid
-148 i386 fdatasync sys_fdatasync __ia32_sys_fdatasync
-149 i386 _sysctl sys_sysctl __ia32_compat_sys_sysctl
-150 i386 mlock sys_mlock __ia32_sys_mlock
-151 i386 munlock sys_munlock __ia32_sys_munlock
-152 i386 mlockall sys_mlockall __ia32_sys_mlockall
-153 i386 munlockall sys_munlockall __ia32_sys_munlockall
-154 i386 sched_setparam sys_sched_setparam __ia32_sys_sched_setparam
-155 i386 sched_getparam sys_sched_getparam __ia32_sys_sched_getparam
-156 i386 sched_setscheduler sys_sched_setscheduler __ia32_sys_sched_setscheduler
-157 i386 sched_getscheduler sys_sched_getscheduler __ia32_sys_sched_getscheduler
-158 i386 sched_yield sys_sched_yield __ia32_sys_sched_yield
-159 i386 sched_get_priority_max sys_sched_get_priority_max __ia32_sys_sched_get_priority_max
-160 i386 sched_get_priority_min sys_sched_get_priority_min __ia32_sys_sched_get_priority_min
-161 i386 sched_rr_get_interval sys_sched_rr_get_interval_time32 __ia32_sys_sched_rr_get_interval_time32
-162 i386 nanosleep sys_nanosleep_time32 __ia32_sys_nanosleep_time32
-163 i386 mremap sys_mremap __ia32_sys_mremap
-164 i386 setresuid sys_setresuid16 __ia32_sys_setresuid16
-165 i386 getresuid sys_getresuid16 __ia32_sys_getresuid16
-166 i386 vm86 sys_vm86 __ia32_sys_ni_syscall
+138 i386 setfsuid __ia32_sys_setfsuid16
+139 i386 setfsgid __ia32_sys_setfsgid16
+140 i386 _llseek __ia32_sys_llseek
+141 i386 getdents __ia32_sys_getdents __ia32_compat_sys_getdents
+142 i386 _newselect __ia32_sys_select __ia32_compat_sys_select
+143 i386 flock __ia32_sys_flock
+144 i386 msync __ia32_sys_msync
+145 i386 readv __ia32_sys_readv __ia32_compat_sys_readv
+146 i386 writev __ia32_sys_writev __ia32_compat_sys_writev
+147 i386 getsid __ia32_sys_getsid
+148 i386 fdatasync __ia32_sys_fdatasync
+149 i386 _sysctl __ia32_sys_sysctl __ia32_compat_sys_sysctl
+150 i386 mlock __ia32_sys_mlock
+151 i386 munlock __ia32_sys_munlock
+152 i386 mlockall __ia32_sys_mlockall
+153 i386 munlockall __ia32_sys_munlockall
+154 i386 sched_setparam __ia32_sys_sched_setparam
+155 i386 sched_getparam __ia32_sys_sched_getparam
+156 i386 sched_setscheduler __ia32_sys_sched_setscheduler
+157 i386 sched_getscheduler __ia32_sys_sched_getscheduler
+158 i386 sched_yield __ia32_sys_sched_yield
+159 i386 sched_get_priority_max __ia32_sys_sched_get_priority_max
+160 i386 sched_get_priority_min __ia32_sys_sched_get_priority_min
+161 i386 sched_rr_get_interval __ia32_sys_sched_rr_get_interval_time32
+162 i386 nanosleep __ia32_sys_nanosleep_time32
+163 i386 mremap __ia32_sys_mremap
+164 i386 setresuid __ia32_sys_setresuid16
+165 i386 getresuid __ia32_sys_getresuid16
+166 i386 vm86 __ia32_sys_vm86 __ia32_sys_ni_syscall
167 i386 query_module
-168 i386 poll sys_poll __ia32_sys_poll
+168 i386 poll __ia32_sys_poll
169 i386 nfsservctl
-170 i386 setresgid sys_setresgid16 __ia32_sys_setresgid16
-171 i386 getresgid sys_getresgid16 __ia32_sys_getresgid16
-172 i386 prctl sys_prctl __ia32_sys_prctl
-173 i386 rt_sigreturn sys_rt_sigreturn __ia32_compat_sys_rt_sigreturn
-174 i386 rt_sigaction sys_rt_sigaction __ia32_compat_sys_rt_sigaction
-175 i386 rt_sigprocmask sys_rt_sigprocmask __ia32_compat_sys_rt_sigprocmask
-176 i386 rt_sigpending sys_rt_sigpending __ia32_compat_sys_rt_sigpending
-177 i386 rt_sigtimedwait sys_rt_sigtimedwait_time32 __ia32_compat_sys_rt_sigtimedwait_time32
-178 i386 rt_sigqueueinfo sys_rt_sigqueueinfo __ia32_compat_sys_rt_sigqueueinfo
-179 i386 rt_sigsuspend sys_rt_sigsuspend __ia32_compat_sys_rt_sigsuspend
-180 i386 pread64 sys_x86_pread __ia32_sys_x86_pread
-181 i386 pwrite64 sys_x86_pwrite __ia32_sys_x86_pwrite
-182 i386 chown sys_chown16 __ia32_sys_chown16
-183 i386 getcwd sys_getcwd __ia32_sys_getcwd
-184 i386 capget sys_capget __ia32_sys_capget
-185 i386 capset sys_capset __ia32_sys_capset
-186 i386 sigaltstack sys_sigaltstack __ia32_compat_sys_sigaltstack
-187 i386 sendfile sys_sendfile __ia32_compat_sys_sendfile
+170 i386 setresgid __ia32_sys_setresgid16
+171 i386 getresgid __ia32_sys_getresgid16
+172 i386 prctl __ia32_sys_prctl
+173 i386 rt_sigreturn __ia32_sys_rt_sigreturn __ia32_compat_sys_rt_sigreturn
+174 i386 rt_sigaction __ia32_sys_rt_sigaction __ia32_compat_sys_rt_sigaction
+175 i386 rt_sigprocmask __ia32_sys_rt_sigprocmask __ia32_compat_sys_rt_sigprocmask
+176 i386 rt_sigpending __ia32_sys_rt_sigpending __ia32_compat_sys_rt_sigpending
+177 i386 rt_sigtimedwait __ia32_sys_rt_sigtimedwait_time32 __ia32_compat_sys_rt_sigtimedwait_time32
+178 i386 rt_sigqueueinfo __ia32_sys_rt_sigqueueinfo __ia32_compat_sys_rt_sigqueueinfo
+179 i386 rt_sigsuspend __ia32_sys_rt_sigsuspend __ia32_compat_sys_rt_sigsuspend
+180 i386 pread64 __ia32_sys_x86_pread
+181 i386 pwrite64 __ia32_sys_x86_pwrite
+182 i386 chown __ia32_sys_chown16
+183 i386 getcwd __ia32_sys_getcwd
+184 i386 capget __ia32_sys_capget
+185 i386 capset __ia32_sys_capset
+186 i386 sigaltstack __ia32_sys_sigaltstack __ia32_compat_sys_sigaltstack
+187 i386 sendfile __ia32_sys_sendfile __ia32_compat_sys_sendfile
188 i386 getpmsg
189 i386 putpmsg
-190 i386 vfork sys_vfork __ia32_sys_vfork
-191 i386 ugetrlimit sys_getrlimit __ia32_compat_sys_getrlimit
-192 i386 mmap2 sys_mmap_pgoff __ia32_sys_mmap_pgoff
-193 i386 truncate64 sys_x86_truncate64 __ia32_sys_x86_truncate64
-194 i386 ftruncate64 sys_x86_ftruncate64 __ia32_sys_x86_ftruncate64
-195 i386 stat64 sys_stat64 __ia32_compat_sys_x86_stat64
-196 i386 lstat64 sys_lstat64 __ia32_compat_sys_x86_lstat64
-197 i386 fstat64 sys_fstat64 __ia32_compat_sys_x86_fstat64
-198 i386 lchown32 sys_lchown __ia32_sys_lchown
-199 i386 getuid32 sys_getuid __ia32_sys_getuid
-200 i386 getgid32 sys_getgid __ia32_sys_getgid
-201 i386 geteuid32 sys_geteuid __ia32_sys_geteuid
-202 i386 getegid32 sys_getegid __ia32_sys_getegid
-203 i386 setreuid32 sys_setreuid __ia32_sys_setreuid
-204 i386 setregid32 sys_setregid __ia32_sys_setregid
-205 i386 getgroups32 sys_getgroups __ia32_sys_getgroups
-206 i386 setgroups32 sys_setgroups __ia32_sys_setgroups
-207 i386 fchown32 sys_fchown __ia32_sys_fchown
-208 i386 setresuid32 sys_setresuid __ia32_sys_setresuid
-209 i386 getresuid32 sys_getresuid __ia32_sys_getresuid
-210 i386 setresgid32 sys_setresgid __ia32_sys_setresgid
-211 i386 getresgid32 sys_getresgid __ia32_sys_getresgid
-212 i386 chown32 sys_chown __ia32_sys_chown
-213 i386 setuid32 sys_setuid __ia32_sys_setuid
-214 i386 setgid32 sys_setgid __ia32_sys_setgid
-215 i386 setfsuid32 sys_setfsuid __ia32_sys_setfsuid
-216 i386 setfsgid32 sys_setfsgid __ia32_sys_setfsgid
-217 i386 pivot_root sys_pivot_root __ia32_sys_pivot_root
-218 i386 mincore sys_mincore __ia32_sys_mincore
-219 i386 madvise sys_madvise __ia32_sys_madvise
-220 i386 getdents64 sys_getdents64 __ia32_sys_getdents64
-221 i386 fcntl64 sys_fcntl64 __ia32_compat_sys_fcntl64
+190 i386 vfork __ia32_sys_vfork
+191 i386 ugetrlimit __ia32_sys_getrlimit __ia32_compat_sys_getrlimit
+192 i386 mmap2 __ia32_sys_mmap_pgoff
+193 i386 truncate64 __ia32_sys_x86_truncate64
+194 i386 ftruncate64 __ia32_sys_x86_ftruncate64
+195 i386 stat64 __ia32_sys_stat64 __ia32_compat_sys_x86_stat64
+196 i386 lstat64 __ia32_sys_lstat64 __ia32_compat_sys_x86_lstat64
+197 i386 fstat64 __ia32_sys_fstat64 __ia32_compat_sys_x86_fstat64
+198 i386 lchown32 __ia32_sys_lchown
+199 i386 getuid32 __ia32_sys_getuid
+200 i386 getgid32 __ia32_sys_getgid
+201 i386 geteuid32 __ia32_sys_geteuid
+202 i386 getegid32 __ia32_sys_getegid
+203 i386 setreuid32 __ia32_sys_setreuid
+204 i386 setregid32 __ia32_sys_setregid
+205 i386 getgroups32 __ia32_sys_getgroups
+206 i386 setgroups32 __ia32_sys_setgroups
+207 i386 fchown32 __ia32_sys_fchown
+208 i386 setresuid32 __ia32_sys_setresuid
+209 i386 getresuid32 __ia32_sys_getresuid
+210 i386 setresgid32 __ia32_sys_setresgid
+211 i386 getresgid32 __ia32_sys_getresgid
+212 i386 chown32 __ia32_sys_chown
+213 i386 setuid32 __ia32_sys_setuid
+214 i386 setgid32 __ia32_sys_setgid
+215 i386 setfsuid32 __ia32_sys_setfsuid
+216 i386 setfsgid32 __ia32_sys_setfsgid
+217 i386 pivot_root __ia32_sys_pivot_root
+218 i386 mincore __ia32_sys_mincore
+219 i386 madvise __ia32_sys_madvise
+220 i386 getdents64 __ia32_sys_getdents64
+221 i386 fcntl64 __ia32_sys_fcntl64 __ia32_compat_sys_fcntl64
# 222 is unused
# 223 is unused
-224 i386 gettid sys_gettid __ia32_sys_gettid
-225 i386 readahead sys_x86_readahead __ia32_sys_x86_readahead
-226 i386 setxattr sys_setxattr __ia32_sys_setxattr
-227 i386 lsetxattr sys_lsetxattr __ia32_sys_lsetxattr
-228 i386 fsetxattr sys_fsetxattr __ia32_sys_fsetxattr
-229 i386 getxattr sys_getxattr __ia32_sys_getxattr
-230 i386 lgetxattr sys_lgetxattr __ia32_sys_lgetxattr
-231 i386 fgetxattr sys_fgetxattr __ia32_sys_fgetxattr
-232 i386 listxattr sys_listxattr __ia32_sys_listxattr
-233 i386 llistxattr sys_llistxattr __ia32_sys_llistxattr
-234 i386 flistxattr sys_flistxattr __ia32_sys_flistxattr
-235 i386 removexattr sys_removexattr __ia32_sys_removexattr
-236 i386 lremovexattr sys_lremovexattr __ia32_sys_lremovexattr
-237 i386 fremovexattr sys_fremovexattr __ia32_sys_fremovexattr
-238 i386 tkill sys_tkill __ia32_sys_tkill
-239 i386 sendfile64 sys_sendfile64 __ia32_sys_sendfile64
-240 i386 futex sys_futex_time32 __ia32_sys_futex_time32
-241 i386 sched_setaffinity sys_sched_setaffinity __ia32_compat_sys_sched_setaffinity
-242 i386 sched_getaffinity sys_sched_getaffinity __ia32_compat_sys_sched_getaffinity
-243 i386 set_thread_area sys_set_thread_area __ia32_sys_set_thread_area
-244 i386 get_thread_area sys_get_thread_area __ia32_sys_get_thread_area
-245 i386 io_setup sys_io_setup __ia32_compat_sys_io_setup
-246 i386 io_destroy sys_io_destroy __ia32_sys_io_destroy
-247 i386 io_getevents sys_io_getevents_time32 __ia32_sys_io_getevents_time32
-248 i386 io_submit sys_io_submit __ia32_compat_sys_io_submit
-249 i386 io_cancel sys_io_cancel __ia32_sys_io_cancel
-250 i386 fadvise64 sys_x86_fadvise64 __ia32_sys_x86_fadvise64
+224 i386 gettid __ia32_sys_gettid
+225 i386 readahead __ia32_sys_x86_readahead
+226 i386 setxattr __ia32_sys_setxattr
+227 i386 lsetxattr __ia32_sys_lsetxattr
+228 i386 fsetxattr __ia32_sys_fsetxattr
+229 i386 getxattr __ia32_sys_getxattr
+230 i386 lgetxattr __ia32_sys_lgetxattr
+231 i386 fgetxattr __ia32_sys_fgetxattr
+232 i386 listxattr __ia32_sys_listxattr
+233 i386 llistxattr __ia32_sys_llistxattr
+234 i386 flistxattr __ia32_sys_flistxattr
+235 i386 removexattr __ia32_sys_removexattr
+236 i386 lremovexattr __ia32_sys_lremovexattr
+237 i386 fremovexattr __ia32_sys_fremovexattr
+238 i386 tkill __ia32_sys_tkill
+239 i386 sendfile64 __ia32_sys_sendfile64
+240 i386 futex __ia32_sys_futex_time32
+241 i386 sched_setaffinity __ia32_sys_sched_setaffinity __ia32_compat_sys_sched_setaffinity
+242 i386 sched_getaffinity __ia32_sys_sched_getaffinity __ia32_compat_sys_sched_getaffinity
+243 i386 set_thread_area __ia32_sys_set_thread_area
+244 i386 get_thread_area __ia32_sys_get_thread_area
+245 i386 io_setup __ia32_sys_io_setup __ia32_compat_sys_io_setup
+246 i386 io_destroy __ia32_sys_io_destroy
+247 i386 io_getevents __ia32_sys_io_getevents_time32
+248 i386 io_submit __ia32_sys_io_submit __ia32_compat_sys_io_submit
+249 i386 io_cancel __ia32_sys_io_cancel
+250 i386 fadvise64 __ia32_sys_x86_fadvise64
# 251 is available for reuse (was briefly sys_set_zone_reclaim)
-252 i386 exit_group sys_exit_group __ia32_sys_exit_group
-253 i386 lookup_dcookie sys_lookup_dcookie __ia32_compat_sys_lookup_dcookie
-254 i386 epoll_create sys_epoll_create __ia32_sys_epoll_create
-255 i386 epoll_ctl sys_epoll_ctl __ia32_sys_epoll_ctl
-256 i386 epoll_wait sys_epoll_wait __ia32_sys_epoll_wait
-257 i386 remap_file_pages sys_remap_file_pages __ia32_sys_remap_file_pages
-258 i386 set_tid_address sys_set_tid_address __ia32_sys_set_tid_address
-259 i386 timer_create sys_timer_create __ia32_compat_sys_timer_create
-260 i386 timer_settime sys_timer_settime32 __ia32_sys_timer_settime32
-261 i386 timer_gettime sys_timer_gettime32 __ia32_sys_timer_gettime32
-262 i386 timer_getoverrun sys_timer_getoverrun __ia32_sys_timer_getoverrun
-263 i386 timer_delete sys_timer_delete __ia32_sys_timer_delete
-264 i386 clock_settime sys_clock_settime32 __ia32_sys_clock_settime32
-265 i386 clock_gettime sys_clock_gettime32 __ia32_sys_clock_gettime32
-266 i386 clock_getres sys_clock_getres_time32 __ia32_sys_clock_getres_time32
-267 i386 clock_nanosleep sys_clock_nanosleep_time32 __ia32_sys_clock_nanosleep_time32
-268 i386 statfs64 sys_statfs64 __ia32_compat_sys_statfs64
-269 i386 fstatfs64 sys_fstatfs64 __ia32_compat_sys_fstatfs64
-270 i386 tgkill sys_tgkill __ia32_sys_tgkill
-271 i386 utimes sys_utimes_time32 __ia32_sys_utimes_time32
-272 i386 fadvise64_64 sys_x86_fadvise64_64 __ia32_sys_x86_fadvise64_64
+252 i386 exit_group __ia32_sys_exit_group
+253 i386 lookup_dcookie __ia32_sys_lookup_dcookie __ia32_compat_sys_lookup_dcookie
+254 i386 epoll_create __ia32_sys_epoll_create
+255 i386 epoll_ctl __ia32_sys_epoll_ctl
+256 i386 epoll_wait __ia32_sys_epoll_wait
+257 i386 remap_file_pages __ia32_sys_remap_file_pages
+258 i386 set_tid_address __ia32_sys_set_tid_address
+259 i386 timer_create __ia32_sys_timer_create __ia32_compat_sys_timer_create
+260 i386 timer_settime __ia32_sys_timer_settime32
+261 i386 timer_gettime __ia32_sys_timer_gettime32
+262 i386 timer_getoverrun __ia32_sys_timer_getoverrun
+263 i386 timer_delete __ia32_sys_timer_delete
+264 i386 clock_settime __ia32_sys_clock_settime32
+265 i386 clock_gettime __ia32_sys_clock_gettime32
+266 i386 clock_getres __ia32_sys_clock_getres_time32
+267 i386 clock_nanosleep __ia32_sys_clock_nanosleep_time32
+268 i386 statfs64 __ia32_sys_statfs64 __ia32_compat_sys_statfs64
+269 i386 fstatfs64 __ia32_sys_fstatfs64 __ia32_compat_sys_fstatfs64
+270 i386 tgkill __ia32_sys_tgkill
+271 i386 utimes __ia32_sys_utimes_time32
+272 i386 fadvise64_64 __ia32_sys_x86_fadvise64_64
273 i386 vserver
-274 i386 mbind sys_mbind __ia32_sys_mbind
-275 i386 get_mempolicy sys_get_mempolicy __ia32_compat_sys_get_mempolicy
-276 i386 set_mempolicy sys_set_mempolicy __ia32_sys_set_mempolicy
-277 i386 mq_open sys_mq_open __ia32_compat_sys_mq_open
-278 i386 mq_unlink sys_mq_unlink __ia32_sys_mq_unlink
-279 i386 mq_timedsend sys_mq_timedsend_time32 __ia32_sys_mq_timedsend_time32
-280 i386 mq_timedreceive sys_mq_timedreceive_time32 __ia32_sys_mq_timedreceive_time32
-281 i386 mq_notify sys_mq_notify __ia32_compat_sys_mq_notify
-282 i386 mq_getsetattr sys_mq_getsetattr __ia32_compat_sys_mq_getsetattr
-283 i386 kexec_load sys_kexec_load __ia32_compat_sys_kexec_load
-284 i386 waitid sys_waitid __ia32_compat_sys_waitid
+274 i386 mbind __ia32_sys_mbind
+275 i386 get_mempolicy __ia32_sys_get_mempolicy __ia32_compat_sys_get_mempolicy
+276 i386 set_mempolicy __ia32_sys_set_mempolicy
+277 i386 mq_open __ia32_sys_mq_open __ia32_compat_sys_mq_open
+278 i386 mq_unlink __ia32_sys_mq_unlink
+279 i386 mq_timedsend __ia32_sys_mq_timedsend_time32
+280 i386 mq_timedreceive __ia32_sys_mq_timedreceive_time32
+281 i386 mq_notify __ia32_sys_mq_notify __ia32_compat_sys_mq_notify
+282 i386 mq_getsetattr __ia32_sys_mq_getsetattr __ia32_compat_sys_mq_getsetattr
+283 i386 kexec_load __ia32_sys_kexec_load __ia32_compat_sys_kexec_load
+284 i386 waitid __ia32_sys_waitid __ia32_compat_sys_waitid
# 285 sys_setaltroot
-286 i386 add_key sys_add_key __ia32_sys_add_key
-287 i386 request_key sys_request_key __ia32_sys_request_key
-288 i386 keyctl sys_keyctl __ia32_compat_sys_keyctl
-289 i386 ioprio_set sys_ioprio_set __ia32_sys_ioprio_set
-290 i386 ioprio_get sys_ioprio_get __ia32_sys_ioprio_get
-291 i386 inotify_init sys_inotify_init __ia32_sys_inotify_init
-292 i386 inotify_add_watch sys_inotify_add_watch __ia32_sys_inotify_add_watch
-293 i386 inotify_rm_watch sys_inotify_rm_watch __ia32_sys_inotify_rm_watch
-294 i386 migrate_pages sys_migrate_pages __ia32_sys_migrate_pages
-295 i386 openat sys_openat __ia32_compat_sys_openat
-296 i386 mkdirat sys_mkdirat __ia32_sys_mkdirat
-297 i386 mknodat sys_mknodat __ia32_sys_mknodat
-298 i386 fchownat sys_fchownat __ia32_sys_fchownat
-299 i386 futimesat sys_futimesat_time32 __ia32_sys_futimesat_time32
-300 i386 fstatat64 sys_fstatat64 __ia32_compat_sys_x86_fstatat
-301 i386 unlinkat sys_unlinkat __ia32_sys_unlinkat
-302 i386 renameat sys_renameat __ia32_sys_renameat
-303 i386 linkat sys_linkat __ia32_sys_linkat
-304 i386 symlinkat sys_symlinkat __ia32_sys_symlinkat
-305 i386 readlinkat sys_readlinkat __ia32_sys_readlinkat
-306 i386 fchmodat sys_fchmodat __ia32_sys_fchmodat
-307 i386 faccessat sys_faccessat __ia32_sys_faccessat
-308 i386 pselect6 sys_pselect6_time32 __ia32_compat_sys_pselect6_time32
-309 i386 ppoll sys_ppoll_time32 __ia32_compat_sys_ppoll_time32
-310 i386 unshare sys_unshare __ia32_sys_unshare
-311 i386 set_robust_list sys_set_robust_list __ia32_compat_sys_set_robust_list
-312 i386 get_robust_list sys_get_robust_list __ia32_compat_sys_get_robust_list
-313 i386 splice sys_splice __ia32_sys_splice
-314 i386 sync_file_range sys_x86_sync_file_range __ia32_sys_x86_sync_file_range
-315 i386 tee sys_tee __ia32_sys_tee
-316 i386 vmsplice sys_vmsplice __ia32_compat_sys_vmsplice
-317 i386 move_pages sys_move_pages __ia32_compat_sys_move_pages
-318 i386 getcpu sys_getcpu __ia32_sys_getcpu
-319 i386 epoll_pwait sys_epoll_pwait __ia32_sys_epoll_pwait
-320 i386 utimensat sys_utimensat_time32 __ia32_sys_utimensat_time32
-321 i386 signalfd sys_signalfd __ia32_compat_sys_signalfd
-322 i386 timerfd_create sys_timerfd_create __ia32_sys_timerfd_create
-323 i386 eventfd sys_eventfd __ia32_sys_eventfd
-324 i386 fallocate sys_x86_fallocate __ia32_sys_x86_fallocate
-325 i386 timerfd_settime sys_timerfd_settime32 __ia32_sys_timerfd_settime32
-326 i386 timerfd_gettime sys_timerfd_gettime32 __ia32_sys_timerfd_gettime32
-327 i386 signalfd4 sys_signalfd4 __ia32_compat_sys_signalfd4
-328 i386 eventfd2 sys_eventfd2 __ia32_sys_eventfd2
-329 i386 epoll_create1 sys_epoll_create1 __ia32_sys_epoll_create1
-330 i386 dup3 sys_dup3 __ia32_sys_dup3
-331 i386 pipe2 sys_pipe2 __ia32_sys_pipe2
-332 i386 inotify_init1 sys_inotify_init1 __ia32_sys_inotify_init1
-333 i386 preadv sys_preadv __ia32_compat_sys_preadv
-334 i386 pwritev sys_pwritev __ia32_compat_sys_pwritev
-335 i386 rt_tgsigqueueinfo sys_rt_tgsigqueueinfo __ia32_compat_sys_rt_tgsigqueueinfo
-336 i386 perf_event_open sys_perf_event_open __ia32_sys_perf_event_open
-337 i386 recvmmsg sys_recvmmsg_time32 __ia32_compat_sys_recvmmsg_time32
-338 i386 fanotify_init sys_fanotify_init __ia32_sys_fanotify_init
-339 i386 fanotify_mark sys_fanotify_mark __ia32_compat_sys_fanotify_mark
-340 i386 prlimit64 sys_prlimit64 __ia32_sys_prlimit64
-341 i386 name_to_handle_at sys_name_to_handle_at __ia32_sys_name_to_handle_at
-342 i386 open_by_handle_at sys_open_by_handle_at __ia32_compat_sys_open_by_handle_at
-343 i386 clock_adjtime sys_clock_adjtime32 __ia32_sys_clock_adjtime32
-344 i386 syncfs sys_syncfs __ia32_sys_syncfs
-345 i386 sendmmsg sys_sendmmsg __ia32_compat_sys_sendmmsg
-346 i386 setns sys_setns __ia32_sys_setns
-347 i386 process_vm_readv sys_process_vm_readv __ia32_compat_sys_process_vm_readv
-348 i386 process_vm_writev sys_process_vm_writev __ia32_compat_sys_process_vm_writev
-349 i386 kcmp sys_kcmp __ia32_sys_kcmp
-350 i386 finit_module sys_finit_module __ia32_sys_finit_module
-351 i386 sched_setattr sys_sched_setattr __ia32_sys_sched_setattr
-352 i386 sched_getattr sys_sched_getattr __ia32_sys_sched_getattr
-353 i386 renameat2 sys_renameat2 __ia32_sys_renameat2
-354 i386 seccomp sys_seccomp __ia32_sys_seccomp
-355 i386 getrandom sys_getrandom __ia32_sys_getrandom
-356 i386 memfd_create sys_memfd_create __ia32_sys_memfd_create
-357 i386 bpf sys_bpf __ia32_sys_bpf
-358 i386 execveat sys_execveat __ia32_compat_sys_execveat
-359 i386 socket sys_socket __ia32_sys_socket
-360 i386 socketpair sys_socketpair __ia32_sys_socketpair
-361 i386 bind sys_bind __ia32_sys_bind
-362 i386 connect sys_connect __ia32_sys_connect
-363 i386 listen sys_listen __ia32_sys_listen
-364 i386 accept4 sys_accept4 __ia32_sys_accept4
-365 i386 getsockopt sys_getsockopt __ia32_compat_sys_getsockopt
-366 i386 setsockopt sys_setsockopt __ia32_compat_sys_setsockopt
-367 i386 getsockname sys_getsockname __ia32_sys_getsockname
-368 i386 getpeername sys_getpeername __ia32_sys_getpeername
-369 i386 sendto sys_sendto __ia32_sys_sendto
-370 i386 sendmsg sys_sendmsg __ia32_compat_sys_sendmsg
-371 i386 recvfrom sys_recvfrom __ia32_compat_sys_recvfrom
-372 i386 recvmsg sys_recvmsg __ia32_compat_sys_recvmsg
-373 i386 shutdown sys_shutdown __ia32_sys_shutdown
-374 i386 userfaultfd sys_userfaultfd __ia32_sys_userfaultfd
-375 i386 membarrier sys_membarrier __ia32_sys_membarrier
-376 i386 mlock2 sys_mlock2 __ia32_sys_mlock2
-377 i386 copy_file_range sys_copy_file_range __ia32_sys_copy_file_range
-378 i386 preadv2 sys_preadv2 __ia32_compat_sys_preadv2
-379 i386 pwritev2 sys_pwritev2 __ia32_compat_sys_pwritev2
-380 i386 pkey_mprotect sys_pkey_mprotect __ia32_sys_pkey_mprotect
-381 i386 pkey_alloc sys_pkey_alloc __ia32_sys_pkey_alloc
-382 i386 pkey_free sys_pkey_free __ia32_sys_pkey_free
-383 i386 statx sys_statx __ia32_sys_statx
-384 i386 arch_prctl sys_arch_prctl __ia32_compat_sys_arch_prctl
-385 i386 io_pgetevents sys_io_pgetevents_time32 __ia32_compat_sys_io_pgetevents
-386 i386 rseq sys_rseq __ia32_sys_rseq
-393 i386 semget sys_semget __ia32_sys_semget
-394 i386 semctl sys_semctl __ia32_compat_sys_semctl
-395 i386 shmget sys_shmget __ia32_sys_shmget
-396 i386 shmctl sys_shmctl __ia32_compat_sys_shmctl
-397 i386 shmat sys_shmat __ia32_compat_sys_shmat
-398 i386 shmdt sys_shmdt __ia32_sys_shmdt
-399 i386 msgget sys_msgget __ia32_sys_msgget
-400 i386 msgsnd sys_msgsnd __ia32_compat_sys_msgsnd
-401 i386 msgrcv sys_msgrcv __ia32_compat_sys_msgrcv
-402 i386 msgctl sys_msgctl __ia32_compat_sys_msgctl
-403 i386 clock_gettime64 sys_clock_gettime __ia32_sys_clock_gettime
-404 i386 clock_settime64 sys_clock_settime __ia32_sys_clock_settime
-405 i386 clock_adjtime64 sys_clock_adjtime __ia32_sys_clock_adjtime
-406 i386 clock_getres_time64 sys_clock_getres __ia32_sys_clock_getres
-407 i386 clock_nanosleep_time64 sys_clock_nanosleep __ia32_sys_clock_nanosleep
-408 i386 timer_gettime64 sys_timer_gettime __ia32_sys_timer_gettime
-409 i386 timer_settime64 sys_timer_settime __ia32_sys_timer_settime
-410 i386 timerfd_gettime64 sys_timerfd_gettime __ia32_sys_timerfd_gettime
-411 i386 timerfd_settime64 sys_timerfd_settime __ia32_sys_timerfd_settime
-412 i386 utimensat_time64 sys_utimensat __ia32_sys_utimensat
-413 i386 pselect6_time64 sys_pselect6 __ia32_compat_sys_pselect6_time64
-414 i386 ppoll_time64 sys_ppoll __ia32_compat_sys_ppoll_time64
-416 i386 io_pgetevents_time64 sys_io_pgetevents __ia32_sys_io_pgetevents
-417 i386 recvmmsg_time64 sys_recvmmsg __ia32_compat_sys_recvmmsg_time64
-418 i386 mq_timedsend_time64 sys_mq_timedsend __ia32_sys_mq_timedsend
-419 i386 mq_timedreceive_time64 sys_mq_timedreceive __ia32_sys_mq_timedreceive
-420 i386 semtimedop_time64 sys_semtimedop __ia32_sys_semtimedop
-421 i386 rt_sigtimedwait_time64 sys_rt_sigtimedwait __ia32_compat_sys_rt_sigtimedwait_time64
-422 i386 futex_time64 sys_futex __ia32_sys_futex
-423 i386 sched_rr_get_interval_time64 sys_sched_rr_get_interval __ia32_sys_sched_rr_get_interval
-424 i386 pidfd_send_signal sys_pidfd_send_signal __ia32_sys_pidfd_send_signal
-425 i386 io_uring_setup sys_io_uring_setup __ia32_sys_io_uring_setup
-426 i386 io_uring_enter sys_io_uring_enter __ia32_sys_io_uring_enter
-427 i386 io_uring_register sys_io_uring_register __ia32_sys_io_uring_register
-428 i386 open_tree sys_open_tree __ia32_sys_open_tree
-429 i386 move_mount sys_move_mount __ia32_sys_move_mount
-430 i386 fsopen sys_fsopen __ia32_sys_fsopen
-431 i386 fsconfig sys_fsconfig __ia32_sys_fsconfig
-432 i386 fsmount sys_fsmount __ia32_sys_fsmount
-433 i386 fspick sys_fspick __ia32_sys_fspick
-434 i386 pidfd_open sys_pidfd_open __ia32_sys_pidfd_open
-435 i386 clone3 sys_clone3 __ia32_sys_clone3
-437 i386 openat2 sys_openat2 __ia32_sys_openat2
-438 i386 pidfd_getfd sys_pidfd_getfd __ia32_sys_pidfd_getfd
+286 i386 add_key __ia32_sys_add_key
+287 i386 request_key __ia32_sys_request_key
+288 i386 keyctl __ia32_sys_keyctl __ia32_compat_sys_keyctl
+289 i386 ioprio_set __ia32_sys_ioprio_set
+290 i386 ioprio_get __ia32_sys_ioprio_get
+291 i386 inotify_init __ia32_sys_inotify_init
+292 i386 inotify_add_watch __ia32_sys_inotify_add_watch
+293 i386 inotify_rm_watch __ia32_sys_inotify_rm_watch
+294 i386 migrate_pages __ia32_sys_migrate_pages
+295 i386 openat __ia32_sys_openat __ia32_compat_sys_openat
+296 i386 mkdirat __ia32_sys_mkdirat
+297 i386 mknodat __ia32_sys_mknodat
+298 i386 fchownat __ia32_sys_fchownat
+299 i386 futimesat __ia32_sys_futimesat_time32
+300 i386 fstatat64 __ia32_sys_fstatat64 __ia32_compat_sys_x86_fstatat
+301 i386 unlinkat __ia32_sys_unlinkat
+302 i386 renameat __ia32_sys_renameat
+303 i386 linkat __ia32_sys_linkat
+304 i386 symlinkat __ia32_sys_symlinkat
+305 i386 readlinkat __ia32_sys_readlinkat
+306 i386 fchmodat __ia32_sys_fchmodat
+307 i386 faccessat __ia32_sys_faccessat
+308 i386 pselect6 __ia32_sys_pselect6_time32 __ia32_compat_sys_pselect6_time32
+309 i386 ppoll __ia32_sys_ppoll_time32 __ia32_compat_sys_ppoll_time32
+310 i386 unshare __ia32_sys_unshare
+311 i386 set_robust_list __ia32_sys_set_robust_list __ia32_compat_sys_set_robust_list
+312 i386 get_robust_list __ia32_sys_get_robust_list __ia32_compat_sys_get_robust_list
+313 i386 splice __ia32_sys_splice
+314 i386 sync_file_range __ia32_sys_x86_sync_file_range
+315 i386 tee __ia32_sys_tee
+316 i386 vmsplice __ia32_sys_vmsplice __ia32_compat_sys_vmsplice
+317 i386 move_pages __ia32_sys_move_pages __ia32_compat_sys_move_pages
+318 i386 getcpu __ia32_sys_getcpu
+319 i386 epoll_pwait __ia32_sys_epoll_pwait
+320 i386 utimensat __ia32_sys_utimensat_time32
+321 i386 signalfd __ia32_sys_signalfd __ia32_compat_sys_signalfd
+322 i386 timerfd_create __ia32_sys_timerfd_create
+323 i386 eventfd __ia32_sys_eventfd
+324 i386 fallocate __ia32_sys_x86_fallocate
+325 i386 timerfd_settime __ia32_sys_timerfd_settime32
+326 i386 timerfd_gettime __ia32_sys_timerfd_gettime32
+327 i386 signalfd4 __ia32_sys_signalfd4 __ia32_compat_sys_signalfd4
+328 i386 eventfd2 __ia32_sys_eventfd2
+329 i386 epoll_create1 __ia32_sys_epoll_create1
+330 i386 dup3 __ia32_sys_dup3
+331 i386 pipe2 __ia32_sys_pipe2
+332 i386 inotify_init1 __ia32_sys_inotify_init1
+333 i386 preadv __ia32_sys_preadv __ia32_compat_sys_preadv
+334 i386 pwritev __ia32_sys_pwritev __ia32_compat_sys_pwritev
+335 i386 rt_tgsigqueueinfo __ia32_sys_rt_tgsigqueueinfo __ia32_compat_sys_rt_tgsigqueueinfo
+336 i386 perf_event_open __ia32_sys_perf_event_open
+337 i386 recvmmsg __ia32_sys_recvmmsg_time32 __ia32_compat_sys_recvmmsg_time32
+338 i386 fanotify_init __ia32_sys_fanotify_init
+339 i386 fanotify_mark __ia32_sys_fanotify_mark __ia32_compat_sys_fanotify_mark
+340 i386 prlimit64 __ia32_sys_prlimit64
+341 i386 name_to_handle_at __ia32_sys_name_to_handle_at
+342 i386 open_by_handle_at __ia32_sys_open_by_handle_at __ia32_compat_sys_open_by_handle_at
+343 i386 clock_adjtime __ia32_sys_clock_adjtime32
+344 i386 syncfs __ia32_sys_syncfs
+345 i386 sendmmsg __ia32_sys_sendmmsg __ia32_compat_sys_sendmmsg
+346 i386 setns __ia32_sys_setns
+347 i386 process_vm_readv __ia32_sys_process_vm_readv __ia32_compat_sys_process_vm_readv
+348 i386 process_vm_writev __ia32_sys_process_vm_writev __ia32_compat_sys_process_vm_writev
+349 i386 kcmp __ia32_sys_kcmp
+350 i386 finit_module __ia32_sys_finit_module
+351 i386 sched_setattr __ia32_sys_sched_setattr
+352 i386 sched_getattr __ia32_sys_sched_getattr
+353 i386 renameat2 __ia32_sys_renameat2
+354 i386 seccomp __ia32_sys_seccomp
+355 i386 getrandom __ia32_sys_getrandom
+356 i386 memfd_create __ia32_sys_memfd_create
+357 i386 bpf __ia32_sys_bpf
+358 i386 execveat __ia32_sys_execveat __ia32_compat_sys_execveat
+359 i386 socket __ia32_sys_socket
+360 i386 socketpair __ia32_sys_socketpair
+361 i386 bind __ia32_sys_bind
+362 i386 connect __ia32_sys_connect
+363 i386 listen __ia32_sys_listen
+364 i386 accept4 __ia32_sys_accept4
+365 i386 getsockopt __ia32_sys_getsockopt __ia32_compat_sys_getsockopt
+366 i386 setsockopt __ia32_sys_setsockopt __ia32_compat_sys_setsockopt
+367 i386 getsockname __ia32_sys_getsockname
+368 i386 getpeername __ia32_sys_getpeername
+369 i386 sendto __ia32_sys_sendto
+370 i386 sendmsg __ia32_sys_sendmsg __ia32_compat_sys_sendmsg
+371 i386 recvfrom __ia32_sys_recvfrom __ia32_compat_sys_recvfrom
+372 i386 recvmsg __ia32_sys_recvmsg __ia32_compat_sys_recvmsg
+373 i386 shutdown __ia32_sys_shutdown
+374 i386 userfaultfd __ia32_sys_userfaultfd
+375 i386 membarrier __ia32_sys_membarrier
+376 i386 mlock2 __ia32_sys_mlock2
+377 i386 copy_file_range __ia32_sys_copy_file_range
+378 i386 preadv2 __ia32_sys_preadv2 __ia32_compat_sys_preadv2
+379 i386 pwritev2 __ia32_sys_pwritev2 __ia32_compat_sys_pwritev2
+380 i386 pkey_mprotect __ia32_sys_pkey_mprotect
+381 i386 pkey_alloc __ia32_sys_pkey_alloc
+382 i386 pkey_free __ia32_sys_pkey_free
+383 i386 statx __ia32_sys_statx
+384 i386 arch_prctl __ia32_sys_arch_prctl __ia32_compat_sys_arch_prctl
+385 i386 io_pgetevents __ia32_sys_io_pgetevents_time32 __ia32_compat_sys_io_pgetevents
+386 i386 rseq __ia32_sys_rseq
+393 i386 semget __ia32_sys_semget
+394 i386 semctl __ia32_sys_semctl __ia32_compat_sys_semctl
+395 i386 shmget __ia32_sys_shmget
+396 i386 shmctl __ia32_sys_shmctl __ia32_compat_sys_shmctl
+397 i386 shmat __ia32_sys_shmat __ia32_compat_sys_shmat
+398 i386 shmdt __ia32_sys_shmdt
+399 i386 msgget __ia32_sys_msgget
+400 i386 msgsnd __ia32_sys_msgsnd __ia32_compat_sys_msgsnd
+401 i386 msgrcv __ia32_sys_msgrcv __ia32_compat_sys_msgrcv
+402 i386 msgctl __ia32_sys_msgctl __ia32_compat_sys_msgctl
+403 i386 clock_gettime64 __ia32_sys_clock_gettime
+404 i386 clock_settime64 __ia32_sys_clock_settime
+405 i386 clock_adjtime64 __ia32_sys_clock_adjtime
+406 i386 clock_getres_time64 __ia32_sys_clock_getres
+407 i386 clock_nanosleep_time64 __ia32_sys_clock_nanosleep
+408 i386 timer_gettime64 __ia32_sys_timer_gettime
+409 i386 timer_settime64 __ia32_sys_timer_settime
+410 i386 timerfd_gettime64 __ia32_sys_timerfd_gettime
+411 i386 timerfd_settime64 __ia32_sys_timerfd_settime
+412 i386 utimensat_time64 __ia32_sys_utimensat
+413 i386 pselect6_time64 __ia32_sys_pselect6 __ia32_compat_sys_pselect6_time64
+414 i386 ppoll_time64 __ia32_sys_ppoll __ia32_compat_sys_ppoll_time64
+416 i386 io_pgetevents_time64 __ia32_sys_io_pgetevents
+417 i386 recvmmsg_time64 __ia32_sys_recvmmsg __ia32_compat_sys_recvmmsg_time64
+418 i386 mq_timedsend_time64 __ia32_sys_mq_timedsend
+419 i386 mq_timedreceive_time64 __ia32_sys_mq_timedreceive
+420 i386 semtimedop_time64 __ia32_sys_semtimedop
+421 i386 rt_sigtimedwait_time64 __ia32_sys_rt_sigtimedwait __ia32_compat_sys_rt_sigtimedwait_time64
+422 i386 futex_time64 __ia32_sys_futex
+423 i386 sched_rr_get_interval_time64 __ia32_sys_sched_rr_get_interval
+424 i386 pidfd_send_signal __ia32_sys_pidfd_send_signal
+425 i386 io_uring_setup __ia32_sys_io_uring_setup
+426 i386 io_uring_enter __ia32_sys_io_uring_enter
+427 i386 io_uring_register __ia32_sys_io_uring_register
+428 i386 open_tree __ia32_sys_open_tree
+429 i386 move_mount __ia32_sys_move_mount
+430 i386 fsopen __ia32_sys_fsopen
+431 i386 fsconfig __ia32_sys_fsconfig
+432 i386 fsmount __ia32_sys_fsmount
+433 i386 fspick __ia32_sys_fspick
+434 i386 pidfd_open __ia32_sys_pidfd_open
+435 i386 clone3 __ia32_sys_clone3
+437 i386 openat2 __ia32_sys_openat2
+438 i386 pidfd_getfd __ia32_sys_pidfd_getfd
diff --git a/arch/x86/entry/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh
index 1af2be39e7d9..e776a68bbe42 100644
--- a/arch/x86/entry/syscalls/syscalltbl.sh
+++ b/arch/x86/entry/syscalls/syscalltbl.sh
@@ -36,25 +36,32 @@ emit() {
if [ "$abi" = "64" -a "${entry}" != "${entry#__x64_sys}" ]; then
umlentry="sys${entry#__x64_sys}"
fi
+ if [ "$abi" = "I386" -a "${entry}" != "${entry#__ia32_sys}" ]; then
+ umlentry="sys${entry#__ia32_sys}"
+ fi
- if [ -z "$compat" ]; then
- if [ -n "$entry" -a -z "$umlentry" ]; then
- syscall_macro "$abi" "$nr" "$entry"
- elif [ -n "$umlentry" ]; then # implies -n "$entry"
+ if [ -n "$entry" ]; then
+ if [ -n "$umlentry" ]; then
echo "#ifdef CONFIG_X86"
- syscall_macro "$abi" "$nr" "$entry"
+ fi
+
+ if [ -n "$compat" ]; then
+ echo "#ifdef CONFIG_X86_32"
+ fi
+
+ syscall_macro "$abi" "$nr" "$entry"
+
+ if [ -n "$compat" ]; then
+ echo "#else /* CONFIG_X86_32 */"
+ syscall_macro "$abi" "$nr" "$compat"
+ echo "#endif"
+ fi
+
+ if [ -n "$umlentry" ]; then
echo "#else /* CONFIG_UML */"
syscall_macro "$abi" "$nr" "$umlentry"
echo "#endif"
fi
- else
- echo "#ifdef CONFIG_X86_32"
- if [ -n "$entry" ]; then
- syscall_macro "$abi" "$nr" "$entry"
- fi
- echo "#else"
- syscall_macro "$abi" "$nr" "$compat"
- echo "#endif"
fi
}
diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h
index d20ffc518cf4..576178aefa01 100644
--- a/arch/x86/include/asm/syscall.h
+++ b/arch/x86/include/asm/syscall.h
@@ -17,13 +17,7 @@
#include <asm/thread_info.h> /* for TS_COMPAT */
#include <asm/unistd.h>
-#ifdef CONFIG_X86_64
typedef asmlinkage long (*sys_call_ptr_t)(const struct pt_regs *);
-#else
-typedef asmlinkage long (*sys_call_ptr_t)(unsigned long, unsigned long,
- unsigned long, unsigned long,
- unsigned long, unsigned long);
-#endif /* CONFIG_X86_64 */
extern const sys_call_ptr_t sys_call_table[];
#if defined(CONFIG_X86_32)
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h
index 00be12017118..9e9259a92020 100644
--- a/arch/x86/include/asm/syscall_wrapper.h
+++ b/arch/x86/include/asm/syscall_wrapper.h
@@ -8,6 +8,9 @@
struct pt_regs;
+extern asmlinkage long __x64_sys_ni_syscall(const struct pt_regs *regs);
+extern asmlinkage long __ia32_sys_ni_syscall(const struct pt_regs *regs);
+
/*
* Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
* struct pt_regs *regs as the only argument of the syscall stub named
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 91b7b6e1a115..06cbdca634d6 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -17,33 +17,4 @@
/* kernel/ioport.c */
long ksys_ioperm(unsigned long from, unsigned long num, int turn_on);
-#ifdef CONFIG_X86_32
-/*
- * These definitions are only valid on pure 32-bit systems; x86-64 uses a
- * different syscall calling convention
- */
-asmlinkage long sys_ioperm(unsigned long, unsigned long, int);
-asmlinkage long sys_iopl(unsigned int);
-
-/* kernel/ldt.c */
-asmlinkage long sys_modify_ldt(int, void __user *, unsigned long);
-
-/* kernel/signal.c */
-asmlinkage long sys_rt_sigreturn(void);
-
-/* kernel/tls.c */
-asmlinkage long sys_set_thread_area(struct user_desc __user *);
-asmlinkage long sys_get_thread_area(struct user_desc __user *);
-
-/* X86_32 only */
-
-/* kernel/signal.c */
-asmlinkage long sys_sigreturn(void);
-
-/* kernel/vm86_32.c */
-struct vm86_struct;
-asmlinkage long sys_vm86old(struct vm86_struct __user *);
-asmlinkage long sys_vm86(unsigned long, unsigned long);
-
-#endif /* CONFIG_X86_32 */
#endif /* _ASM_X86_SYSCALLS_H */
--
2.24.1
^ permalink raw reply related [flat|nested] 17+ messages in thread* Re: [PATCH 3/5] x86-32: Enable syscall wrappers
2020-02-21 5:09 ` [PATCH 3/5] x86-32: Enable syscall wrappers Brian Gerst
@ 2020-02-21 7:05 ` Dominik Brodowski
0 siblings, 0 replies; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 7:05 UTC (permalink / raw)
To: Brian Gerst
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
H . Peter Anvin, Andy Lutomirski
On Fri, Feb 21, 2020 at 12:09:32AM -0500, Brian Gerst wrote:
> Enable pt_regs based syscalls for 32-bit.
>
> Signed-off-by: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH 4/5] x86-64: Use syscall wrappers for x32_rt_sigreturn
2020-02-21 5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
` (2 preceding siblings ...)
2020-02-21 5:09 ` [PATCH 3/5] x86-32: Enable syscall wrappers Brian Gerst
@ 2020-02-21 5:09 ` Brian Gerst
2020-02-21 6:56 ` Dominik Brodowski
2020-02-21 5:09 ` [PATCH 5/5] x86: Drop asmlinkage from syscalls Brian Gerst
2020-02-21 6:07 ` [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Dominik Brodowski
5 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 5:09 UTC (permalink / raw)
To: linux-kernel, x86
Cc: Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski, Brian Gerst
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/entry/syscalls/syscall_64.tbl | 2 +-
arch/x86/include/asm/sighandling.h | 5 -----
arch/x86/kernel/signal.c | 2 +-
3 files changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 44d510bc9b78..0b5a25bc9998 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -367,7 +367,7 @@
# is defined.
#
512 x32 rt_sigaction __x32_compat_sys_rt_sigaction
-513 x32 rt_sigreturn sys32_x32_rt_sigreturn
+513 x32 rt_sigreturn __x32_compat_sys_x32_rt_sigreturn
514 x32 ioctl __x32_compat_sys_ioctl
515 x32 readv __x32_compat_sys_readv
516 x32 writev __x32_compat_sys_writev
diff --git a/arch/x86/include/asm/sighandling.h b/arch/x86/include/asm/sighandling.h
index 2fcbd6f33ef7..bd26834724e5 100644
--- a/arch/x86/include/asm/sighandling.h
+++ b/arch/x86/include/asm/sighandling.h
@@ -17,9 +17,4 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
struct pt_regs *regs, unsigned long mask);
-
-#ifdef CONFIG_X86_X32_ABI
-asmlinkage long sys32_x32_rt_sigreturn(void);
-#endif
-
#endif /* _ASM_X86_SIGHANDLING_H */
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 8a29573851a3..860904990b26 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -859,7 +859,7 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
}
#ifdef CONFIG_X86_X32_ABI
-asmlinkage long sys32_x32_rt_sigreturn(void)
+COMPAT_SYSCALL_DEFINE0(x32_rt_sigreturn)
{
struct pt_regs *regs = current_pt_regs();
struct rt_sigframe_x32 __user *frame;
--
2.24.1
^ permalink raw reply related [flat|nested] 17+ messages in thread* Re: [PATCH 4/5] x86-64: Use syscall wrappers for x32_rt_sigreturn
2020-02-21 5:09 ` [PATCH 4/5] x86-64: Use syscall wrappers for x32_rt_sigreturn Brian Gerst
@ 2020-02-21 6:56 ` Dominik Brodowski
0 siblings, 0 replies; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 6:56 UTC (permalink / raw)
To: Brian Gerst
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
H . Peter Anvin, Andy Lutomirski
On Fri, Feb 21, 2020 at 12:09:33AM -0500, Brian Gerst wrote:
> Signed-off-by: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH 5/5] x86: Drop asmlinkage from syscalls
2020-02-21 5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
` (3 preceding siblings ...)
2020-02-21 5:09 ` [PATCH 4/5] x86-64: Use syscall wrappers for x32_rt_sigreturn Brian Gerst
@ 2020-02-21 5:09 ` Brian Gerst
2020-02-21 6:56 ` Dominik Brodowski
2020-02-21 6:07 ` [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Dominik Brodowski
5 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 5:09 UTC (permalink / raw)
To: linux-kernel, x86
Cc: Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski, Brian Gerst
asmlinkage is no longer required since the syscall ABI is now fully under
x86 architecture control. This makes the 32-bit native syscalls a bit more
effecient by passing in regs via EAX instead of on the stack.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/entry/syscall_32.c | 2 +-
arch/x86/entry/syscall_64.c | 2 +-
arch/x86/include/asm/syscall.h | 2 +-
arch/x86/include/asm/syscall_wrapper.h | 20 ++++++++++----------
4 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c
index 7af944b686ef..4e0113f3d4e8 100644
--- a/arch/x86/entry/syscall_32.c
+++ b/arch/x86/entry/syscall_32.c
@@ -8,7 +8,7 @@
#include <asm/asm-offsets.h>
#include <asm/syscall.h>
-#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
+#define __SYSCALL_I386(nr, sym, qual) extern long sym(const struct pt_regs *);
#include <asm/syscalls_32.h>
#undef __SYSCALL_I386
diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index 058dc1b73e96..3331a71eec77 100644
--- a/arch/x86/entry/syscall_64.c
+++ b/arch/x86/entry/syscall_64.c
@@ -8,7 +8,7 @@
#include <asm/asm-offsets.h>
#include <asm/syscall.h>
-#define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
+#define __SYSCALL_64(nr, sym, qual) extern long sym(const struct pt_regs *);
#define __SYSCALL_X32(nr, sym, qual) __SYSCALL_64(nr, sym, qual)
#include <asm/syscalls_64.h>
#undef __SYSCALL_64
diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h
index 576178aefa01..a0b189714bac 100644
--- a/arch/x86/include/asm/syscall.h
+++ b/arch/x86/include/asm/syscall.h
@@ -17,7 +17,7 @@
#include <asm/thread_info.h> /* for TS_COMPAT */
#include <asm/unistd.h>
-typedef asmlinkage long (*sys_call_ptr_t)(const struct pt_regs *);
+typedef long (*sys_call_ptr_t)(const struct pt_regs *);
extern const sys_call_ptr_t sys_call_table[];
#if defined(CONFIG_X86_32)
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h
index 9e9259a92020..68d2231bbff0 100644
--- a/arch/x86/include/asm/syscall_wrapper.h
+++ b/arch/x86/include/asm/syscall_wrapper.h
@@ -8,8 +8,8 @@
struct pt_regs;
-extern asmlinkage long __x64_sys_ni_syscall(const struct pt_regs *regs);
-extern asmlinkage long __ia32_sys_ni_syscall(const struct pt_regs *regs);
+extern long __x64_sys_ni_syscall(const struct pt_regs *regs);
+extern long __ia32_sys_ni_syscall(const struct pt_regs *regs);
/*
* Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
@@ -59,23 +59,23 @@ extern asmlinkage long __ia32_sys_ni_syscall(const struct pt_regs *regs);
,,(unsigned int)regs->di,,(unsigned int)regs->bp)
#define __SYS_STUBx(abi, name, ...) \
- asmlinkage long __##abi##_##name(const struct pt_regs *regs); \
+ long __##abi##_##name(const struct pt_regs *regs); \
ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
- asmlinkage long __##abi##_##name(const struct pt_regs *regs) \
+ long __##abi##_##name(const struct pt_regs *regs) \
{ \
return __se_##name(__VA_ARGS__); \
}
#define __SYS_STUB0(abi, name) \
- asmlinkage long __##abi##_##name(const struct pt_regs *regs); \
+ long __##abi##_##name(const struct pt_regs *regs); \
ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
- asmlinkage long __##abi##_##name(const struct pt_regs *regs) \
+ long __##abi##_##name(const struct pt_regs *regs) \
{ \
return __do_##name(); \
}
#define __COND_SYSCALL(abi, name) \
- asmlinkage __weak long \
+ __weak long \
__##abi##_##name(const struct pt_regs *regs) \
{ \
return sys_ni_syscall(); \
@@ -270,8 +270,8 @@ extern asmlinkage long __ia32_sys_ni_syscall(const struct pt_regs *regs);
* For VSYSCALLS, we need to declare these three syscalls with the new
* pt_regs-based calling convention for in-kernel use.
*/
-asmlinkage long __x64_sys_getcpu(const struct pt_regs *regs);
-asmlinkage long __x64_sys_gettimeofday(const struct pt_regs *regs);
-asmlinkage long __x64_sys_time(const struct pt_regs *regs);
+long __x64_sys_getcpu(const struct pt_regs *regs);
+long __x64_sys_gettimeofday(const struct pt_regs *regs);
+long __x64_sys_time(const struct pt_regs *regs);
#endif /* _ASM_X86_SYSCALL_WRAPPER_H */
--
2.24.1
^ permalink raw reply related [flat|nested] 17+ messages in thread* Re: [PATCH 5/5] x86: Drop asmlinkage from syscalls
2020-02-21 5:09 ` [PATCH 5/5] x86: Drop asmlinkage from syscalls Brian Gerst
@ 2020-02-21 6:56 ` Dominik Brodowski
0 siblings, 0 replies; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 6:56 UTC (permalink / raw)
To: Brian Gerst
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
H . Peter Anvin, Andy Lutomirski
On Fri, Feb 21, 2020 at 12:09:34AM -0500, Brian Gerst wrote:
> asmlinkage is no longer required since the syscall ABI is now fully under
> x86 architecture control. This makes the 32-bit native syscalls a bit more
> effecient by passing in regs via EAX instead of on the stack.
>
> Signed-off-by: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Thanks,
Dominik
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native
2020-02-21 5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
` (4 preceding siblings ...)
2020-02-21 5:09 ` [PATCH 5/5] x86: Drop asmlinkage from syscalls Brian Gerst
@ 2020-02-21 6:07 ` Dominik Brodowski
2020-02-21 13:15 ` Brian Gerst
5 siblings, 1 reply; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 6:07 UTC (permalink / raw)
To: Brian Gerst
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
H . Peter Anvin, Andy Lutomirski
Brian,
On Fri, Feb 21, 2020 at 12:09:29AM -0500, Brian Gerst wrote:
> This patch series cleans up the x86 syscall wrapper code and converts
> the 32-bit native kernel over to pt_regs based syscalls.
thanks for your patchset. Could you explain a bit more what the rationale
is. Due to asmlinkage, it doesn't leak "random user-provided register
content down the call chain" (as was the case for x86-64). But it may be
cleaner, and you mention in patch 5/5 that the new way is "a bit more
efficient" -- do you have numbers?
Thanks,
Dominik
^ permalink raw reply [flat|nested] 17+ messages in thread* Re: [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native
2020-02-21 6:07 ` [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Dominik Brodowski
@ 2020-02-21 13:15 ` Brian Gerst
2020-02-21 15:28 ` Dominik Brodowski
0 siblings, 1 reply; 17+ messages in thread
From: Brian Gerst @ 2020-02-21 13:15 UTC (permalink / raw)
To: Dominik Brodowski
Cc: Linux Kernel Mailing List, the arch/x86 maintainers,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski
On Fri, Feb 21, 2020 at 2:07 AM Dominik Brodowski
<linux@dominikbrodowski.net> wrote:
>
> Brian,
>
> On Fri, Feb 21, 2020 at 12:09:29AM -0500, Brian Gerst wrote:
> > This patch series cleans up the x86 syscall wrapper code and converts
> > the 32-bit native kernel over to pt_regs based syscalls.
>
> thanks for your patchset. Could you explain a bit more what the rationale
> is. Due to asmlinkage, it doesn't leak "random user-provided register
> content down the call chain" (as was the case for x86-64). But it may be
> cleaner, and you mention in patch 5/5 that the new way is "a bit more
> efficient" -- do you have numbers?
The main rationale for this patch set is to make the 32-bit native
kernel consistent with the 64-bit kernel. It's also slightly more
efficient because the old code pushed all 6 arguments onto the stack
whereas the new code only reads the args the syscall needs, with the
pt_regs pointer passed in through a register. By efficient I mean
that it uses fewer instructions and stack accesses, not that it will
actually have a significant difference on a benchmark.
--
Brian Gerst
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native
2020-02-21 13:15 ` Brian Gerst
@ 2020-02-21 15:28 ` Dominik Brodowski
0 siblings, 0 replies; 17+ messages in thread
From: Dominik Brodowski @ 2020-02-21 15:28 UTC (permalink / raw)
To: Brian Gerst
Cc: Linux Kernel Mailing List, the arch/x86 maintainers,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, H . Peter Anvin,
Andy Lutomirski
On Fri, Feb 21, 2020 at 08:15:19AM -0500, Brian Gerst wrote:
> On Fri, Feb 21, 2020 at 2:07 AM Dominik Brodowski
> <linux@dominikbrodowski.net> wrote:
> >
> > Brian,
> >
> > On Fri, Feb 21, 2020 at 12:09:29AM -0500, Brian Gerst wrote:
> > > This patch series cleans up the x86 syscall wrapper code and converts
> > > the 32-bit native kernel over to pt_regs based syscalls.
> >
> > thanks for your patchset. Could you explain a bit more what the rationale
> > is. Due to asmlinkage, it doesn't leak "random user-provided register
> > content down the call chain" (as was the case for x86-64). But it may be
> > cleaner, and you mention in patch 5/5 that the new way is "a bit more
> > efficient" -- do you have numbers?
>
> The main rationale for this patch set is to make the 32-bit native
> kernel consistent with the 64-bit kernel. It's also slightly more
> efficient because the old code pushed all 6 arguments onto the stack
> whereas the new code only reads the args the syscall needs, with the
> pt_regs pointer passed in through a register. By efficient I mean
> that it uses fewer instructions and stack accesses, not that it will
> actually have a significant difference on a benchmark.
OK, could you add such an explanation to the patchset then, please? Thanks,
Dominik
^ permalink raw reply [flat|nested] 17+ messages in thread