The branch stable/14 has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=4937026659c6b2bfad27ad5392c439048fc03b76
commit 4937026659c6b2bfad27ad5392c439048fc03b76
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-05-22 06:56:24 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2025-06-12 18:02:50 +0000
amd64: add ptrace PT_{GET,SET}TLSBASE requests
(cherry picked from commit 7171e591a4c70eb4ee616e33373fd62773ad5a08)
---
sys/amd64/amd64/ptrace_machdep.c | 21 +++++++++++++++++++++
sys/x86/include/ptrace.h | 2 ++
2 files changed, 23 insertions(+)
diff --git a/sys/amd64/amd64/ptrace_machdep.c b/sys/amd64/amd64/ptrace_machdep.c
index 3fce9826b882..0159c6de49d9 100644
--- a/sys/amd64/amd64/ptrace_machdep.c
+++ b/sys/amd64/amd64/ptrace_machdep.c
@@ -373,6 +373,27 @@ cpu_ptrace(struct thread *td, int req, void *addr, int
data)
cpu_ptrace_setbase(td, req, rv);
break;
+ case PT_GETTLSBASE:
+ pcb = td->td_pcb;
+ if ((pcb->pcb_flags & PCB_TLSBASE) != 0)
+ error = copyout(&pcb->pcb_tlsbase, addr, sizeof(*r));
+ else
+ error = ESRCH;
+ break;
+
+ case PT_SETTLSBASE:
+ pcb = td->td_pcb;
+ error = copyin(addr, &rv, sizeof(rv));
+ if (error != 0)
+ break;
+ if (rv >= td->td_proc->p_sysent->sv_maxuser) {
+ error = EINVAL;
+ break;
+ }
+ pcb->pcb_tlsbase = rv;
+ set_pcb_flags(pcb, PCB_TLSBASE);
+ break;
+
default:
error = EINVAL;
break;
diff --git a/sys/x86/include/ptrace.h b/sys/x86/include/ptrace.h
index 36ce8870df35..0d5b57234523 100644
--- a/sys/x86/include/ptrace.h
+++ b/sys/x86/include/ptrace.h
@@ -56,6 +56,8 @@
#define PT_SETFSBASE (PT_FIRSTMACH + 8)
#define PT_GETGSBASE (PT_FIRSTMACH + 9)
#define PT_SETGSBASE (PT_FIRSTMACH + 10)
+#define PT_GETTLSBASE (PT_FIRSTMACH + 11)
+#define PT_SETTLSBASE (PT_FIRSTMACH + 12)
/* Argument structure for PT_GETXSTATE_INFO. */
struct ptrace_xstate_info {
