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diff --git a/lib/libsys/ptrace.2 b/lib/libsys/ptrace.2
--- a/lib/libsys/ptrace.2
+++ b/lib/libsys/ptrace.2
@@ -1105,6 +1105,17 @@
The child process is currently being debugged by a process other
than its parent process.
.El
+.It Dv PT_GET_ABI_NAME
+Returns the string designating the Application Binary Interface (ABI)
+of the traced process.
+Among other details, ABI defines the interpretation of the system calls
+numbers and arguments.
+.Pp
+The buffer where the name is returned is pointed to by the
+.Fa addr
+argument, the length of the buffer is passed in the
+.Fa data
+argument.
.El
.Sh PT_COREDUMP and PT_SC_REMOTE usage
The process must be stopped before dumping or initiating a remote system call.
diff --git a/sys/compat/freebsd32/freebsd32_misc.c b/sys/compat/freebsd32/freebsd32_misc.c
--- a/sys/compat/freebsd32/freebsd32_misc.c
+++ b/sys/compat/freebsd32/freebsd32_misc.c
@@ -1033,6 +1033,7 @@
struct ptrace_sc_ret psr;
int ptevents;
struct ptrace_child *children;
+ char sv_name[32];
} r;
union {
struct ptrace_io_desc32 piod;
@@ -1168,6 +1169,9 @@
else
addr = &r.children;
break;
+ case PT_GET_ABI_NAME:
+ data = sizeof(r.sv_name);
+ break;
case PTINTERNAL_FIRST ... PTINTERNAL_LAST:
error = EINVAL;
break;
@@ -1242,6 +1246,10 @@
free(r.children, M_TEMP);
}
break;
+ case PT_GET_ABI_NAME:
+ error = udata <= strlen(r.sv_name) ? ENOMEM :
+ copyout(&r.sv_name, uaddr, strlen(r.sv_name) + 1);
+ break;
}
return (error);
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c
--- a/sys/kern/sys_process.c
+++ b/sys/kern/sys_process.c
@@ -743,10 +743,11 @@
struct ptrace_sc_ret psr;
int ptevents;
struct ptrace_child *children;
+ char sv_name[32];
} r;
syscallarg_t pscr_args[nitems(td->td_sa.args)];
void *addr;
- int error;
+ int error, data;
error = 0;
addr = &r;
@@ -820,6 +821,10 @@
else
addr = &r.children;
break;
+ case PT_GET_ABI_NAME:
+ data = udata;
+ udata = sizeof(r.sv_name);
+ break;
case PTINTERNAL_FIRST ... PTINTERNAL_LAST:
error = EINVAL;
break;
@@ -879,6 +884,10 @@
free(r.children, M_TEMP);
}
break;
+ case PT_GET_ABI_NAME:
+ error = data <= strlen(r.sv_name) ? ENOMEM :
+ copyout(&r.sv_name, uaddr, strlen(r.sv_name) + 1);
+ break;
}
return (error);
@@ -2030,6 +2039,10 @@
PROC_LOCK(p);
break;
+ case PT_GET_ABI_NAME:
+ strlcpy(addr, p->p_sysent->sv_name, data);
+ break;
+
default:
#ifdef __HAVE_PTRACE_MACHDEP
if (req >= PT_FIRSTMACH) {
diff --git a/sys/sys/ptrace.h b/sys/sys/ptrace.h
--- a/sys/sys/ptrace.h
+++ b/sys/sys/ptrace.h
@@ -87,6 +87,7 @@
#define PT_SC_REMOTE 44 /* Execute a syscall */
#define PT_SET_SC_RET 45 /* Set (fake) syscall results */
#define PT_GET_CHILDREN 46 /* Report children */
+#define PT_GET_ABI_NAME 47 /* Report ABI name */
#define PT_FIRSTMACH 64 /* for machine-specific requests */
#define PT_LASTMACH 127

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