[src/trunk]: src Add new macro PTRACE_BREAKPOINT_ASM in <sys/ptrace.h> MD part

To: source-changes-hg%NetBSD.org@localhost
Subject: [src/trunk]: src Add new macro PTRACE_BREAKPOINT_ASM in <sys/ptrace.h> MD part
From: kamil <kamil%NetBSD.org@localhost>
Date: Tue, 07 Apr 2020 08:00:41 +0000
details:   https://anonhg.NetBSD.org/src/rev/44f0f1242c46
branches:  trunk
changeset: 823105:44f0f1242c46
user:      kamil <kamil%NetBSD.org@localhost>
date:      Wed Apr 12 18:17:59 2017 +0000

description:
Add new macro PTRACE_BREAKPOINT_ASM in <sys/ptrace.h> MD part

This macro ships with a MD-specific assembly instruction triggering
a software breakpoint.

Missing instruction for powerpc targets.

This code is used in ATF tests (lib/libc/sys/t_ptrace_wait).

Original patch by Nick Hudson, thanks!

diffstat:

 sys/arch/aarch64/include/ptrace.h  |   3 ++-
 sys/arch/alpha/include/ptrace.h    |   3 ++-
 sys/arch/amd64/include/ptrace.h    |   3 ++-
 sys/arch/arm/include/ptrace.h      |   6 ++++--
 sys/arch/hppa/include/ptrace.h     |   3 ++-
 sys/arch/m68k/include/ptrace.h     |   3 ++-
 sys/arch/mips/include/ptrace.h     |   3 ++-
 sys/arch/sh3/include/ptrace.h      |   4 +++-
 sys/arch/sparc/include/ptrace.h    |   3 ++-
 sys/arch/vax/include/ptrace.h      |   3 ++-
 tests/lib/libc/sys/t_ptrace_wait.c |  14 ++++++--------
 11 files changed, 29 insertions(+), 19 deletions(-)

diffs (208 lines):

diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/aarch64/include/ptrace.h
--- a/sys/arch/aarch64/include/ptrace.h Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/aarch64/include/ptrace.h Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.4 2015/09/25 16:05:17 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.5 2017/04/12 18:17:59 kamil Exp $ */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -57,6 +57,7 @@
 #define PTRACE_REG_INTRV(r)    (r)->r_reg[0]
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0xd4, 0x20, 0x01, 0xa0 })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile(".word 0xa00120d4" ::: "memory")
 #define PTRACE_BREAKPOINT_SIZE 4
 
 #elif defined(__arm__)
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/alpha/include/ptrace.h
--- a/sys/arch/alpha/include/ptrace.h   Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/alpha/include/ptrace.h   Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.8 2015/09/25 16:05:17 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.9 2017/04/12 18:17:59 kamil Exp $ */
 
 /*
  * Copyright (c) 1994 Christopher G. Demetriou
@@ -53,4 +53,5 @@
 #define PTRACE_REG_INTRV(r)    (r)->r_regs[R_V0]
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0x80, 0x00, 0x00, 0x00 })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("bpt" ::: "memory")
 #define PTRACE_BREAKPOINT_SIZE 4
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/amd64/include/ptrace.h
--- a/sys/arch/amd64/include/ptrace.h   Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/amd64/include/ptrace.h   Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.11 2017/04/08 00:25:49 kamil Exp $        */
+/*     $NetBSD: ptrace.h,v 1.12 2017/04/12 18:17:59 kamil Exp $        */
 
 /*
  * Copyright (c) 1993 Christopher G. Demetriou
@@ -64,6 +64,7 @@
 #define PTRACE_REG_INTRV(r)    (r)->regs[_REG_RAX]
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0xcc })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile ("int3" : : : "memory")
 #define PTRACE_BREAKPOINT_SIZE 1
 #define PTRACE_BREAKPOINT_ADJ  1
 
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/arm/include/ptrace.h
--- a/sys/arch/arm/include/ptrace.h     Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/arm/include/ptrace.h     Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.10 2017/04/08 00:25:49 kamil Exp $        */
+/*     $NetBSD: ptrace.h,v 1.11 2017/04/12 18:17:59 kamil Exp $        */
 
 /*
  * Copyright (c) 1995 Frank Lancaster
@@ -64,5 +64,7 @@
 #define PTRACE_REG_SP(_r)              (_r)->r_sp
 #define PTRACE_REG_INTRV(_r)           (_r)->r[0]
 
-#define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0xe7, 0xff, 0xff, 0xff })
+#define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0xe7, 0xff, 0xff, 0xfe })
+#define PTRACE_BREAKPOINT_INSN 0xe7fffffe
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile (".word " ___STRING(PTRACE_BREAKPOINT_INSN) )
 #define PTRACE_BREAKPOINT_SIZE 4
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/hppa/include/ptrace.h
--- a/sys/arch/hppa/include/ptrace.h    Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/hppa/include/ptrace.h    Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.7 2017/04/08 00:25:49 kamil Exp $ */
+/*     $NetBSD: ptrace.h,v 1.8 2017/04/12 18:17:59 kamil Exp $ */
 
 /*     $OpenBSD: ptrace.h,v 1.2 1998/12/01 03:05:44 mickey Exp $       */
 
@@ -58,4 +58,5 @@
 #define PTRACE_REG_INTRV(r)    (r)->r_regs[28]
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0x00, 0x01, 0x00, 0x04 })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("break %0, %1" :: "i" (HPPA_BREAK_KERNEL), "i" (HPPA_BREAK_SS) : "memory")
 #define PTRACE_BREAKPOINT_SIZE 4
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/m68k/include/ptrace.h
--- a/sys/arch/m68k/include/ptrace.h    Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/m68k/include/ptrace.h    Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.11 2017/04/08 00:25:49 kamil Exp $        */
+/*     $NetBSD: ptrace.h,v 1.12 2017/04/12 18:18:00 kamil Exp $        */
 
 /*
  * Copyright (c) 1993 Christopher G. Demetriou
@@ -59,6 +59,7 @@
 #define PTRACE_REG_INTRV(r)    (r)->r_regs[0]
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0x4e, 0x4f })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("trap #15" ::: "memory")
 #define PTRACE_BREAKPOINT_SIZE 2
 
 #endif /* !_M68K_PTRACE_H_ */
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/mips/include/ptrace.h
--- a/sys/arch/mips/include/ptrace.h    Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/mips/include/ptrace.h    Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.15 2017/04/08 00:25:49 kamil Exp $        */
+/*     $NetBSD: ptrace.h,v 1.16 2017/04/12 18:18:00 kamil Exp $        */
 
 /*
  * Copyright (c) 1992, 1993
@@ -67,6 +67,7 @@
 #define PTRACE_REG_INTRV(r)    (r)->r_regs[2]
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0x00, 0x00, 0x00, 0x0d })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("break")
 #define PTRACE_BREAKPOINT_SIZE 4
 
 /*
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/sh3/include/ptrace.h
--- a/sys/arch/sh3/include/ptrace.h     Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/sh3/include/ptrace.h     Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.13 2017/04/08 00:25:49 kamil Exp $        */
+/*     $NetBSD: ptrace.h,v 1.14 2017/04/12 18:18:00 kamil Exp $        */
 
 /*
  * Copyright (c) 1993 Christopher G. Demetriou
@@ -71,7 +71,9 @@
 #define PTRACE_REG_SP(r)       r->r_r15
 #define PTRACE_REG_INTV(r)     r->r_r0
 
+#define PTRACE_BREAKPOINT_TRAP 0xc3
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0xc3, 0xc3 })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("trapa %0" :: "i"(PTRACE_BREAKPOINT_TRAP))
 #define PTRACE_BREAKPOINT_SIZE 2
 
 #ifdef _KERNEL
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/sparc/include/ptrace.h
--- a/sys/arch/sparc/include/ptrace.h   Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/sparc/include/ptrace.h   Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.10 2016/11/25 14:10:31 christos Exp $ */
+/*     $NetBSD: ptrace.h,v 1.11 2017/04/12 18:18:00 kamil Exp $ */
 
 /*
  * Copyright (c) 1992, 1993
@@ -64,4 +64,5 @@
 #define PTRACE_REG_INTRV(r)    ((register_t)(r)->r_out[0])
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0x91, 0xd0, 0x20, 0x01 })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("ta 1")
 #define PTRACE_BREAKPOINT_SIZE 4
diff -r 3fb87b3b46ce -r 44f0f1242c46 sys/arch/vax/include/ptrace.h
--- a/sys/arch/vax/include/ptrace.h     Wed Apr 12 17:29:49 2017 +0000
+++ b/sys/arch/vax/include/ptrace.h     Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.h,v 1.8 2017/04/11 07:45:36 skrll Exp $ */
+/*     $NetBSD: ptrace.h,v 1.9 2017/04/12 18:18:00 kamil Exp $ */
 
 /*
  * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
@@ -54,4 +54,5 @@
 #define PTRACE_REG_INTRV(r)    (r)->r0
 
 #define PTRACE_BREAKPOINT      ((const uint8_t[]) { 0x03 })
+#define PTRACE_BREAKPOINT_ASM  __asm __volatile("bpt")
 #define PTRACE_BREAKPOINT_SIZE 1
diff -r 3fb87b3b46ce -r 44f0f1242c46 tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c        Wed Apr 12 17:29:49 2017 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c        Wed Apr 12 18:17:59 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.c,v 1.3 2017/04/10 16:45:57 kamil Exp $  */
+/*     $NetBSD: t_ptrace_wait.c,v 1.4 2017/04/12 18:18:00 kamil Exp $  */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.3 2017/04/10 16:45:57 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.4 2017/04/12 18:18:00 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -5771,10 +5771,11 @@
                FORKEE_ASSERT(raise(sigval) == 0);
 
                printf("Before raising software breakpoint from child\n");
-#if defined(__x86_64__)
-               __asm__ __volatile__ ("int3\n;");
+
+#ifdef PTRACE_BREAKPOINT_ASM
+               PTRACE_BREAKPOINT_ASM;
 #else
-               /*  port me */
+               /* port me */
 #endif
 
                printf("Before exiting of the child process\n");
@@ -5831,9 +5832,6 @@
        int happy;
 
 #if defined(__arm__)
-       /* PT_STEP not supported on arm 32-bit */
-       atf_tc_expect_fail("PR kern/51918 PR kern/52119");
-#else
        atf_tc_expect_fail("PR kern/52119");
 #endif
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