sys/ptrace.h: add PTRACE_GET_SYSCALL_INFO from linux v5.3

ptrace API to get details of the syscall the tracee is blocked in, see

  linux commit 201766a20e30f982ccfe36bebfad9602c3ff574a
  ptrace: add PTRACE_GET_SYSCALL_INFO request

the align attribute was used to keep the layout the same across targets
e.g. on m68k uint32_t is 2 byte aligned, this helps with compat ptrace.

diff --git a/include/sys/ptrace.h b/include/sys/ptrace.h
index 229e1f3d996376f061148f6d6240156dafe412a7..2a8680933a62b9f49cf42e6eace289f8a2aff11a 100644 (file)
--- a/include/sys/ptrace.h
+++ b/include/sys/ptrace.h
@@ -41,6 +41,7 @@ extern "C" {
 #define PTRACE_SETSIGMASK 0x420b
 #define PTRACE_SECCOMP_GET_FILTER 0x420c
 #define PTRACE_SECCOMP_GET_METADATA 0x420d
+#define PTRACE_GET_SYSCALL_INFO 0x420e
 
 #define PT_READ_I PTRACE_PEEKTEXT
 #define PT_READ_D PTRACE_PEEKDATA
@@ -88,6 +89,11 @@ extern "C" {
 
 #define PTRACE_PEEKSIGINFO_SHARED 1
 
+#define PTRACE_SYSCALL_INFO_NONE 0
+#define PTRACE_SYSCALL_INFO_ENTRY 1
+#define PTRACE_SYSCALL_INFO_EXIT 2
+#define PTRACE_SYSCALL_INFO_SECCOMP 3
+
 #include <bits/ptrace.h>
 
 struct __ptrace_peeksiginfo_args {
@@ -101,6 +107,28 @@ struct __ptrace_seccomp_metadata {
        uint64_t flags;
 };
 
+struct __ptrace_syscall_info {
+       uint8_t op;
+       uint32_t arch __attribute__((__aligned__(4)));
+       uint64_t instruction_pointer;
+       uint64_t stack_pointer;
+       union {
+               struct {
+                       uint64_t nr;
+                       uint64_t args[6];
+               } entry;
+               struct {
+                       int64_t rval;
+                       uint8_t is_error;
+               } exit;
+               struct {
+                       uint64_t nr;
+                       uint64_t args[6];
+                       uint32_t ret_data;
+               } seccomp;
+       };
+};
+
 long ptrace(int, ...);
 
 #ifdef __cplusplus