arch: basic infrastructure for tracking per-syscall/ABI kernel versions

This commit adds basic support for tracking what kernel introduced a
syscall for a given arch/ABI.  It does not provide any of that kernel
version information, leaving only a SCMP_KV_UNDEF placeholder, nor
does it attempt to do anything meaningful with this new source of
information; this patch simply establishes a new syscalls.csv format
so that we can start properly recording the kernel versions.

Acked-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/src/syscalls.h b/src/syscalls.h
index 58a788c..3a9e0cb 100644
--- a/src/syscalls.h
+++ b/src/syscalls.h
@@ -10,6 +10,7 @@
 #define _SYSCALLS_H
 
 #include <stddef.h>
+#include <seccomp.h>
 
 #include "arch-aarch64.h"
 #include "arch-arm.h"
@@ -37,28 +38,55 @@ struct arch_syscall_table {
 
 	/* each arch listed here must be defined in syscalls.c  */
 	/* NOTE: see the warning above - BEWARE! */
+
 	int x86;
+	enum scmp_kver x86_kver;
 	int x86_64;
+	enum scmp_kver x86_64_kver;
 	int x32;
+	enum scmp_kver x32_kver;
+
 	int arm;
+	enum scmp_kver arm_kver;
 	int aarch64;
+	enum scmp_kver aarch64_kver;
+
 	int mips;
+	enum scmp_kver mips_kver;
 	int mips64;
+	enum scmp_kver mips64_kver;
 	int mips64n32;
+	enum scmp_kver mips64n32_kver;
+
 	int parisc;
+	enum scmp_kver parisc_kver;
 	int parisc64;
+	enum scmp_kver parisc64_kver;
+
 	int ppc;
+	enum scmp_kver ppc_kver;
 	int ppc64;
+	enum scmp_kver ppc64_kver;
+
 	int riscv64;
+	enum scmp_kver riscv64_kver;
+
 	int s390;
+	enum scmp_kver s390_kver;
 	int s390x;
+	enum scmp_kver s390x_kver;
+
 	int sh;
+	enum scmp_kver sh_kver;
 };
-#define OFFSET_ARCH(NAME) offsetof(struct arch_syscall_table, NAME)
+#define SYSTBL_OFFSET(NAME) offsetof(struct arch_syscall_table, NAME)
 
 /* defined in syscalls.perf.template  */
 int syscall_resolve_name(const char *name, int offset);
 const char *syscall_resolve_num(int num, int offset);
+enum scmp_kver syscall_resolve_name_kver(const char *name, int offset_kver);
+enum scmp_kver syscall_resolve_num_kver(int num,
+					int offset_arch, int offset_kver);
 const struct arch_syscall_def *syscall_iterate(unsigned int spot, int offset);
 
 /* helper functions for multiplexed syscalls, e.g. socketcall(2) and ipc(2) */