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[src/trunk]: src/sys/arch/aarch64 Implement TRAP_SIGDEBUG for aarch64...
details: https://anonhg.NetBSD.org/src/rev/243433866dae
branches: trunk
changeset: 324202:243433866dae
user: christos <christos%NetBSD.org@localhost>
date: Thu Jul 19 18:27:26 2018 +0000
description:
Implement TRAP_SIGDEBUG for aarch64...
ptraced programs die with:
data_abort_handler, 257: pid 199.1 (a.out): signal 11 (trap 0x82000006) @pc 0, addr 0x0, error=Instruction Abort (EL0)
diffstat:
sys/arch/aarch64/aarch64/fault.c | 9 ++-
sys/arch/aarch64/aarch64/trap.c | 93 ++++++++++++++++++++++++++++++-------
sys/arch/aarch64/include/machdep.h | 29 ++++++-----
3 files changed, 95 insertions(+), 36 deletions(-)
diffs (281 lines):
diff -r 80d480862848 -r 243433866dae sys/arch/aarch64/aarch64/fault.c
--- a/sys/arch/aarch64/aarch64/fault.c Thu Jul 19 18:04:25 2018 +0000
+++ b/sys/arch/aarch64/aarch64/fault.c Thu Jul 19 18:27:26 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fault.c,v 1.3 2018/07/17 10:07:49 ryo Exp $ */
+/* $NetBSD: fault.c,v 1.4 2018/07/19 18:27:26 christos Exp $ */
/*
* Copyright (c) 2017 Ryo Shimizu <ryo%nerv.org@localhost>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fault.c,v 1.3 2018/07/17 10:07:49 ryo Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fault.c,v 1.4 2018/07/19 18:27:26 christos Exp $");
#include "opt_ddb.h"
#include "opt_uvmhist.h"
@@ -119,7 +119,7 @@
}
void
-data_abort_handler(struct trapframe *tf, uint32_t eclass, const char *trapname)
+data_abort_handler(struct trapframe *tf, uint32_t eclass)
{
struct proc *p;
struct lwp *l;
@@ -297,7 +297,8 @@
/*
* fatal abort. analyze fault status code to show by panic()
*/
- len = snprintf(panicinfo, sizeof(panicinfo), "Trap: %s:", trapname);
+ len = snprintf(panicinfo, sizeof(panicinfo), "Trap: %s:",
+ eclass_trapname(eclass));
if ((fsc >= __arraycount(fault_status_code)) ||
((faultstr = fault_status_code[fsc]) == NULL))
diff -r 80d480862848 -r 243433866dae sys/arch/aarch64/aarch64/trap.c
--- a/sys/arch/aarch64/aarch64/trap.c Thu Jul 19 18:04:25 2018 +0000
+++ b/sys/arch/aarch64/aarch64/trap.c Thu Jul 19 18:27:26 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: trap.c,v 1.5 2018/07/17 00:35:51 christos Exp $ */
+/* $NetBSD: trap.c,v 1.6 2018/07/19 18:27:26 christos Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: trap.c,v 1.5 2018/07/17 00:35:51 christos Exp $");
+__KERNEL_RCSID(1, "$NetBSD: trap.c,v 1.6 2018/07/19 18:27:26 christos Exp $");
#include "opt_arm_intr_impl.h"
#include "opt_compat_netbsd32.h"
@@ -118,14 +118,14 @@
[ESR_EC_VECTOR_CATCH] = "A32: Vector Catch Exception"
};
-static inline const char *
+const char *
eclass_trapname(uint32_t eclass)
{
static char trapnamebuf[sizeof("Unknown trap 0x????????")];
if (eclass >= __arraycount(trap_names) || trap_names[eclass] == NULL) {
snprintf(trapnamebuf, sizeof(trapnamebuf),
- "Unknown trap 0x%02x", eclass);
+ "Unknown trap %#02x", eclass);
return trapnamebuf;
}
return trap_names[eclass];
@@ -175,7 +175,6 @@
{
const uint32_t esr = tf->tf_esr;
const uint32_t eclass = __SHIFTOUT(esr, ESR_EC); /* exception class */
- const char *trapname;
/* re-enable traps and interrupts */
if (!(tf->tf_spsr & SPSR_I))
@@ -183,12 +182,10 @@
else
daif_enable(DAIF_D|DAIF_A);
- trapname = eclass_trapname(eclass);
-
switch (eclass) {
case ESR_EC_INSN_ABT_EL1:
case ESR_EC_DATA_ABT_EL1:
- data_abort_handler(tf, eclass, trapname);
+ data_abort_handler(tf, eclass);
break;
case ESR_EC_BRKPNT_EL1:
@@ -218,7 +215,8 @@
case ESR_EC_ILL_STATE:
default:
panic("Trap: fatal %s: pc=%016" PRIx64 "sp=%016" PRIx64
- "esr=%08x", trapname, tf->tf_pc, tf->tf_sp, esr);
+ "esr=%08x", eclass_trapname(eclass), tf->tf_pc, tf->tf_sp,
+ esr);
break;
}
}
@@ -229,17 +227,14 @@
struct lwp * const l = curlwp;
const uint32_t esr = tf->tf_esr;
const uint32_t eclass = __SHIFTOUT(esr, ESR_EC); /* exception class */
- const char *trapname;
/* enable traps and interrupts */
daif_enable(DAIF_D|DAIF_A|DAIF_I|DAIF_F);
- trapname = eclass_trapname(eclass);
-
switch (eclass) {
case ESR_EC_INSN_ABT_EL0:
case ESR_EC_DATA_ABT_EL0:
- data_abort_handler(tf, eclass, trapname);
+ data_abort_handler(tf, eclass);
userret(l);
break;
@@ -304,13 +299,10 @@
struct lwp * const l = curlwp;
const uint32_t esr = tf->tf_esr;
const uint32_t eclass = __SHIFTOUT(esr, ESR_EC); /* exception class */
- const char *trapname;
/* enable traps and interrupts */
daif_enable(DAIF_D|DAIF_A|DAIF_I|DAIF_F);
- trapname = eclass_trapname(eclass);
-
switch (eclass) {
case ESR_EC_FP_ACCESS:
fpu_load(l);
@@ -319,7 +311,7 @@
case ESR_EC_INSN_ABT_EL0:
case ESR_EC_DATA_ABT_EL0:
- data_abort_handler(tf, eclass, trapname);
+ data_abort_handler(tf, eclass);
userret(l);
break;
@@ -344,14 +336,16 @@
case ESR_EC_FP_TRAP_A32:
case ESR_EC_BKPT_INSN_A32:
/* XXX notyet */
- printf("%s:%d: %s\n", __func__, __LINE__, trapname);
+ printf("%s:%d: %s\n", __func__, __LINE__,
+ eclass_trapname(eclass));
do_trapsignal(l, SIGILL, ILL_ILLTRP, (void *)tf->tf_pc, esr);
userret(l);
break;
#endif /* COMPAT_NETBSD32 */
default:
/* XXX notyet */
- printf("%s:%d: %s\n", __func__, __LINE__, trapname);
+ printf("%s:%d: %s\n", __func__, __LINE__,
+ eclass_trapname(eclass));
do_trapsignal(l, SIGILL, ILL_ILLTRP, (void *)tf->tf_pc, esr);
userret(l);
break;
@@ -451,3 +445,64 @@
}
return error;
}
+
+#ifdef TRAP_SIGDEBUG
+static void
+frame_dump(const struct trapframe *tf)
+{
+ const struct reg *r = &tf->tf_regs;
+
+ printf("trapframe %p\n", tf);
+ for (size_t i = 0; i < __arraycount(r->r_reg); i++) {
+ printf(" r%.2zu %#018%s" PRIx64, i, r->r_reg[i],
+ " \n"[i && (i & 1) == 0]);
+ }
+
+ printf("\n");
+ printf(" sp %#018" PRIx64 " pc %#018" PRIx64 "\n",
+ r->r_sp, r->r_pc);
+ printf(" spsr %#018" PRIx64 " tpidr %#018" PRIx64 "\n",
+ r->r_spsr, r->r_tpidr);
+ printf(" esr %#018" PRIx64 " far %#018" PRIx64 "\n",
+ tf->tf_esr, tf->tf_far);
+
+ printf("\n");
+ hexdump(printf, "Stack dump", tf, 256);
+}
+
+static void
+sigdebug(const struct trapframe *tf, const ksiginfo_t *ksi)
+{
+ struct lwp *l = curlwp;
+ struct proc *p = l->l_proc;
+ const uint32_t eclass = __SHIFTOUT(ksi->ksi_trap, ESR_EC);
+
+ printf("pid %d.%d (%s): signal %d (trap %#x) "
+ "@pc %#" PRIx64 ", addr %p, error=%s\n",
+ p->p_pid, l->l_lid, p->p_comm, ksi->ksi_signo, ksi->ksi_trap,
+ tf->tf_regs.r_pc, ksi->ksi_addr, eclass_trapname(eclass));
+ frame_dump(tf);
+}
+#endif
+
+void do_trapsignal1(
+#ifdef TRAP_SIGDEBUG
+ const char *func,
+ size_t line,
+ struct trapframe *tf,
+#endif
+ struct lwp *l, int signo, int code, void *addr, int trap)
+{
+ ksiginfo_t ksi;
+
+ KSI_INIT_TRAP(&ksi);
+ ksi.ksi_signo = signo;
+ ksi.ksi_code = code;
+ ksi.ksi_addr = addr;
+ ksi.ksi_trap = trap;
+#ifdef TRAP_SIGDEBUG
+ printf("%s, %zu: ", func, line);
+ sigdebug(tf, &ksi);
+#endif
+ (*l->l_proc->p_emul->e_trapsignal)(l, &ksi);
+}
diff -r 80d480862848 -r 243433866dae sys/arch/aarch64/include/machdep.h
--- a/sys/arch/aarch64/include/machdep.h Thu Jul 19 18:04:25 2018 +0000
+++ b/sys/arch/aarch64/include/machdep.h Thu Jul 19 18:27:26 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: machdep.h,v 1.2 2018/07/09 06:19:53 ryo Exp $ */
+/* $NetBSD: machdep.h,v 1.3 2018/07/19 18:27:26 christos Exp $ */
/*
* Copyright (c) 2017 Ryo Shimizu <ryo%nerv.org@localhost>
@@ -77,7 +77,7 @@
struct trapframe;
/* fault.c */
-void data_abort_handler(struct trapframe *, uint32_t, const char *);
+void data_abort_handler(struct trapframe *, uint32_t);
/* trap.c */
void lwp_trampoline(void);
@@ -134,18 +134,21 @@
void load_fpregs(struct fpreg *);
void save_fpregs(struct fpreg *);
-static inline void
-do_trapsignal(struct lwp *l, int signo, int code, void *addr, int trap)
-{
- ksiginfo_t ksi;
+#ifdef TRAP_SIGDEBUG
+#define do_trapsignal(l, signo, code, addr, trap) \
+ do_trapsignal1(__func__, __LINE__, tf, l, signo, code, addr, trap)
+#else
+#define do_trapsignal(l, signo, code, addr, trap) \
+ do_trapsignal1(l, signo, code, addr, trap)
+#endif
- KSI_INIT_TRAP(&ksi);
- ksi.ksi_signo = signo;
- ksi.ksi_code = code;
- ksi.ksi_addr = addr;
- ksi.ksi_trap = trap;
- (*l->l_proc->p_emul->e_trapsignal)(l, &ksi);
-}
+void do_trapsignal1(
+#ifdef TRAP_SIGDEBUG
+ const char *func, size_t line, struct trapframe *tf,
+#endif
+ struct lwp *l, int signo, int code, void *addr, int trap);
+
+const char *eclass_trapname(uint32_t);
#include <sys/pcu.h>
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