From 53dbf303491f486ef2c376e6330280cf2bd2d162 Mon Sep 17 00:00:00 2001
From: David Xu <davidxu@FreeBSD.org>
Date: Tue, 13 Jul 2004 07:22:56 +0000
Subject: Add ptrace_clear_single_step(), alpha already has it for years, the
 function will be used by ptrace to clear a thread's single step state.

---
 sys/amd64/amd64/machdep.c     | 7 +++++++
 sys/i386/i386/machdep.c       | 7 +++++++
 sys/ia64/ia64/machdep.c       | 8 ++++++++
 sys/pc98/i386/machdep.c       | 7 +++++++
 sys/pc98/pc98/machdep.c       | 7 +++++++
 sys/powerpc/aim/machdep.c     | 8 ++++++++
 sys/powerpc/powerpc/machdep.c | 8 ++++++++
 sys/sparc64/sparc64/machdep.c | 7 +++++++
 8 files changed, 59 insertions(+)

diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index bfd0edc7b7ed..b95c211ad1c2 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -1302,6 +1302,13 @@ ptrace_single_step(struct thread *td)
 	return (0);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+	td->td_frame->tf_rflags &= ~PSL_T;
+	return (0);
+}
+
 int
 fill_regs(struct thread *td, struct reg *regs)
 {
diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c
index a783e013f483..ec148fcd56ba 100644
--- a/sys/i386/i386/machdep.c
+++ b/sys/i386/i386/machdep.c
@@ -2251,6 +2251,13 @@ ptrace_single_step(struct thread *td)
 	return (0);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+	td->td_frame->tf_eflags &= ~PSL_T;
+	return (0);
+}
+
 int
 fill_regs(struct thread *td, struct reg *regs)
 {
diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c
index 9fed902d1f40..1dfab47d2b8e 100644
--- a/sys/ia64/ia64/machdep.c
+++ b/sys/ia64/ia64/machdep.c
@@ -1254,6 +1254,14 @@ ptrace_single_step(struct thread *td)
 	return (0);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+
+	td->td_frame->tf_special.psr &= ~IA64_PSR_SS;
+	return (0);
+}
+
 int
 fill_regs(struct thread *td, struct reg *regs)
 {
diff --git a/sys/pc98/i386/machdep.c b/sys/pc98/i386/machdep.c
index 67e5f71f4f41..96576ee70863 100644
--- a/sys/pc98/i386/machdep.c
+++ b/sys/pc98/i386/machdep.c
@@ -2308,6 +2308,13 @@ ptrace_single_step(struct thread *td)
 	return (0);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+	td->td_frame->tf_eflags &= ~PSL_T;
+	return (0);
+}
+
 int
 fill_regs(struct thread *td, struct reg *regs)
 {
diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c
index 67e5f71f4f41..96576ee70863 100644
--- a/sys/pc98/pc98/machdep.c
+++ b/sys/pc98/pc98/machdep.c
@@ -2308,6 +2308,13 @@ ptrace_single_step(struct thread *td)
 	return (0);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+	td->td_frame->tf_eflags &= ~PSL_T;
+	return (0);
+}
+
 int
 fill_regs(struct thread *td, struct reg *regs)
 {
diff --git a/sys/powerpc/aim/machdep.c b/sys/powerpc/aim/machdep.c
index 051a12138fdd..4c3199e211b8 100644
--- a/sys/powerpc/aim/machdep.c
+++ b/sys/powerpc/aim/machdep.c
@@ -820,6 +820,14 @@ ptrace_single_step(struct thread *td)
 	return (ENOSYS);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+
+	/* XXX: coming soon... */
+	return (ENOSYS);
+}
+
 /*
  * Initialise a struct pcpu.
  */
diff --git a/sys/powerpc/powerpc/machdep.c b/sys/powerpc/powerpc/machdep.c
index 051a12138fdd..4c3199e211b8 100644
--- a/sys/powerpc/powerpc/machdep.c
+++ b/sys/powerpc/powerpc/machdep.c
@@ -820,6 +820,14 @@ ptrace_single_step(struct thread *td)
 	return (ENOSYS);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+
+	/* XXX: coming soon... */
+	return (ENOSYS);
+}
+
 /*
  * Initialise a struct pcpu.
  */
diff --git a/sys/sparc64/sparc64/machdep.c b/sys/sparc64/sparc64/machdep.c
index 1671af43824f..73e6aa346c7c 100644
--- a/sys/sparc64/sparc64/machdep.c
+++ b/sys/sparc64/sparc64/machdep.c
@@ -711,6 +711,13 @@ ptrace_single_step(struct thread *td)
 	return (0);
 }
 
+int
+ptrace_clear_single_step(struct thread *td)
+{
+	/* TODO; */
+	return (0);
+}
+
 void
 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
 {
-- 
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