From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [PULL 11/12] semihosting: create SemihostingConfig structure and semihost.h
Date: Fri, 19 Jun 2015 14:47:15 +0100 [thread overview]
Message-ID: <1434721636-25357-12-git-send-email-peter.maydell@linaro.org> (raw)
In-Reply-To: <1434721636-25357-1-git-send-email-peter.maydell@linaro.org>
From: Leon Alrae <leon.alrae@imgtec.com>
Remove semihosting_enabled and semihosting_target and replace them with
SemihostingConfig structure containing equivalent fields. The structure
is defined in vl.c where it is actually set.
Also introduce separate header file include/exec/semihost.h allowing to
access semihosting config related stuff from target specific semihosting
code.
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1434643256-16858-2-git-send-email-leon.alrae@imgtec.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
gdbstub.c | 8 ++++----
include/exec/gdbstub.h | 6 ------
include/exec/semihost.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
include/sysemu/sysemu.h | 1 -
target-arm/helper.c | 7 ++++---
target-lm32/helper.c | 3 ++-
target-m68k/op_helper.c | 5 ++---
target-xtensa/translate.c | 3 ++-
vl.c | 38 +++++++++++++++++++++++++++++---------
9 files changed, 87 insertions(+), 28 deletions(-)
create mode 100644 include/exec/semihost.h
diff --git a/gdbstub.c b/gdbstub.c
index 75563db..cea2a84 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -40,6 +40,7 @@
#include "cpu.h"
#include "qemu/sockets.h"
#include "sysemu/kvm.h"
+#include "exec/semihost.h"
#ifdef CONFIG_USER_ONLY
#define GDB_ATTACHED "0"
@@ -323,8 +324,6 @@ static GDBState *gdbserver_state;
bool gdb_has_xml;
-int semihosting_target = SEMIHOSTING_TARGET_AUTO;
-
#ifdef CONFIG_USER_ONLY
/* XXX: This is not thread safe. Do we care? */
static int gdbserver_fd = -1;
@@ -362,10 +361,11 @@ static enum {
/* Decide if either remote gdb syscalls or native file IO should be used. */
int use_gdb_syscalls(void)
{
- if (semihosting_target == SEMIHOSTING_TARGET_NATIVE) {
+ SemihostingTarget target = semihosting_get_target();
+ if (target == SEMIHOSTING_TARGET_NATIVE) {
/* -semihosting-config target=native */
return false;
- } else if (semihosting_target == SEMIHOSTING_TARGET_GDB) {
+ } else if (target == SEMIHOSTING_TARGET_GDB) {
/* -semihosting-config target=gdb */
return true;
}
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index c633248..a608a26 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -95,10 +95,4 @@ extern bool gdb_has_xml;
/* in gdbstub-xml.c, generated by scripts/feature_to_c.sh */
extern const char *const xml_builtin[][2];
-/* Command line option defining whether semihosting should go via gdb or not */
-extern int semihosting_target;
-#define SEMIHOSTING_TARGET_AUTO 0
-#define SEMIHOSTING_TARGET_NATIVE 1
-#define SEMIHOSTING_TARGET_GDB 2
-
#endif
diff --git a/include/exec/semihost.h b/include/exec/semihost.h
new file mode 100644
index 0000000..c2f0bcb
--- /dev/null
+++ b/include/exec/semihost.h
@@ -0,0 +1,44 @@
+/*
+ * Semihosting support
+ *
+ * Copyright (c) 2015 Imagination Technologies
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SEMIHOST_H
+#define SEMIHOST_H
+
+typedef enum SemihostingTarget {
+ SEMIHOSTING_TARGET_AUTO = 0,
+ SEMIHOSTING_TARGET_NATIVE,
+ SEMIHOSTING_TARGET_GDB
+} SemihostingTarget;
+
+#ifdef CONFIG_USER_ONLY
+static inline bool semihosting_enabled(void)
+{
+ return true;
+}
+
+static inline SemihostingTarget semihosting_get_target(void)
+{
+ return SEMIHOSTING_TARGET_AUTO;
+}
+#else
+bool semihosting_enabled(void);
+SemihostingTarget semihosting_get_target(void);
+#endif
+
+#endif
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 0304aa7..df80951 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -126,7 +126,6 @@ extern int cursor_hide;
extern int graphic_rotate;
extern int no_quit;
extern int no_shutdown;
-extern int semihosting_enabled;
extern int old_param;
extern int boot_menu;
extern bool boot_strict;
diff --git a/target-arm/helper.c b/target-arm/helper.c
index efce6cd..aa34159 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -10,6 +10,7 @@
#include "exec/cpu_ldst.h"
#include "arm_ldst.h"
#include <zlib.h> /* For crc32 */
+#include "exec/semihost.h"
#ifndef CONFIG_USER_ONLY
static inline bool get_phys_addr(CPUARMState *env, target_ulong address,
@@ -4554,7 +4555,7 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM);
return;
case EXCP_BKPT:
- if (semihosting_enabled) {
+ if (semihosting_enabled()) {
int nr;
nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
if (nr == 0xab) {
@@ -4866,7 +4867,7 @@ void arm_cpu_do_interrupt(CPUState *cs)
offset = 4;
break;
case EXCP_SWI:
- if (semihosting_enabled) {
+ if (semihosting_enabled()) {
/* Check for semihosting interrupt. */
if (env->thumb) {
mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code)
@@ -4893,7 +4894,7 @@ void arm_cpu_do_interrupt(CPUState *cs)
break;
case EXCP_BKPT:
/* See if this is a semihosting syscall. */
- if (env->thumb && semihosting_enabled) {
+ if (env->thumb && semihosting_enabled()) {
mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
if (mask == 0xab
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
diff --git a/target-lm32/helper.c b/target-lm32/helper.c
index 7a41f29..a88aa5a 100644
--- a/target-lm32/helper.c
+++ b/target-lm32/helper.c
@@ -20,6 +20,7 @@
#include "cpu.h"
#include "qemu/host-utils.h"
#include "sysemu/sysemu.h"
+#include "exec/semihost.h"
int lm32_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
int mmu_idx)
@@ -162,7 +163,7 @@ void lm32_cpu_do_interrupt(CPUState *cs)
switch (cs->exception_index) {
case EXCP_SYSTEMCALL:
- if (unlikely(semihosting_enabled)) {
+ if (unlikely(semihosting_enabled())) {
/* do_semicall() returns true if call was handled. Otherwise
* do the normal exception handling. */
if (lm32_cpu_do_semihosting(cs)) {
diff --git a/target-m68k/op_helper.c b/target-m68k/op_helper.c
index 06661f5..4f8fabb 100644
--- a/target-m68k/op_helper.c
+++ b/target-m68k/op_helper.c
@@ -19,6 +19,7 @@
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
+#include "exec/semihost.h"
#if defined(CONFIG_USER_ONLY)
@@ -33,8 +34,6 @@ static inline void do_interrupt_m68k_hardirq(CPUM68KState *env)
#else
-extern int semihosting_enabled;
-
/* Try to fill the TLB and return an exception if error. If retaddr is
NULL, it means that the function was called in C code (i.e. not
from generated code or from helper.c) */
@@ -85,7 +84,7 @@ static void do_interrupt_all(CPUM68KState *env, int is_hw)
do_rte(env);
return;
case EXCP_HALT_INSN:
- if (semihosting_enabled
+ if (semihosting_enabled()
&& (env->sr & SR_S) != 0
&& (env->pc & 3) == 0
&& cpu_lduw_code(env, env->pc - 4) == 0x4e71
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index 6e5096c..3d52079 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -37,6 +37,7 @@
#include "qemu/log.h"
#include "sysemu/sysemu.h"
#include "exec/cpu_ldst.h"
+#include "exec/semihost.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
@@ -1216,7 +1217,7 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
break;
case 1: /*SIMCALL*/
- if (semihosting_enabled) {
+ if (semihosting_enabled()) {
if (gen_check_privilege(dc)) {
gen_helper_simcall(cpu_env);
}
diff --git a/vl.c b/vl.c
index 2201e27..a286877 100644
--- a/vl.c
+++ b/vl.c
@@ -119,6 +119,7 @@ int main(int argc, char **argv)
#include "qapi/opts-visitor.h"
#include "qom/object_interfaces.h"
#include "qapi-event.h"
+#include "exec/semihost.h"
#define MAX_VIRTIO_CONSOLES 1
#define MAX_SCLP_CONSOLES 1
@@ -169,7 +170,6 @@ int graphic_rotate = 0;
const char *watchdog;
QEMUOptionRom option_rom[MAX_OPTION_ROMS];
int nb_option_roms;
-int semihosting_enabled = 0;
int old_param = 0;
const char *qemu_name;
int alt_grab = 0;
@@ -1246,6 +1246,26 @@ static void configure_msg(QemuOpts *opts)
}
/***********************************************************/
+/* Semihosting */
+
+typedef struct SemihostingConfig {
+ bool enabled;
+ SemihostingTarget target;
+} SemihostingConfig;
+
+static SemihostingConfig semihosting;
+
+bool semihosting_enabled(void)
+{
+ return semihosting.enabled;
+}
+
+SemihostingTarget semihosting_get_target(void)
+{
+ return semihosting.target;
+}
+
+/***********************************************************/
/* USB devices */
static int usb_device_add(const char *devname)
@@ -3622,24 +3642,24 @@ int main(int argc, char **argv, char **envp)
nb_option_roms++;
break;
case QEMU_OPTION_semihosting:
- semihosting_enabled = 1;
- semihosting_target = SEMIHOSTING_TARGET_AUTO;
+ semihosting.enabled = true;
+ semihosting.target = SEMIHOSTING_TARGET_AUTO;
break;
case QEMU_OPTION_semihosting_config:
- semihosting_enabled = 1;
+ semihosting.enabled = true;
opts = qemu_opts_parse(qemu_find_opts("semihosting-config"),
optarg, 0);
if (opts != NULL) {
- semihosting_enabled = qemu_opt_get_bool(opts, "enable",
+ semihosting.enabled = qemu_opt_get_bool(opts, "enable",
true);
const char *target = qemu_opt_get(opts, "target");
if (target != NULL) {
if (strcmp("native", target) == 0) {
- semihosting_target = SEMIHOSTING_TARGET_NATIVE;
+ semihosting.target = SEMIHOSTING_TARGET_NATIVE;
} else if (strcmp("gdb", target) == 0) {
- semihosting_target = SEMIHOSTING_TARGET_GDB;
+ semihosting.target = SEMIHOSTING_TARGET_GDB;
} else if (strcmp("auto", target) == 0) {
- semihosting_target = SEMIHOSTING_TARGET_AUTO;
+ semihosting.target = SEMIHOSTING_TARGET_AUTO;
} else {
fprintf(stderr, "Unsupported semihosting-config"
" %s\n",
@@ -3647,7 +3667,7 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
} else {
- semihosting_target = SEMIHOSTING_TARGET_AUTO;
+ semihosting.target = SEMIHOSTING_TARGET_AUTO;
}
} else {
fprintf(stderr, "Unsupported semihosting-config %s\n",
--
1.9.1
next prev parent reply other threads:[~2015-06-19 13:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-19 13:47 [Qemu-devel] [PULL 00/12] target-arm queue Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 01/12] target-arm: Add the Cortex-M4 CPU Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 02/12] hw/arm/sysbus-fdt: enable vfio-calxeda-xgmac dynamic instantiation Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 03/12] target-arm: Do not reset sysregs marked as ALIAS Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 04/12] target-arm/helper.c: define MPUIR register Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 05/12] target-arm: Add registers for PMSAv7 Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 06/12] target-arm: Implement PMSAv7 MPU Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 07/12] target-arm: Add support for Cortex-R5 Peter Maydell
2017-05-05 12:05 ` Philippe Mathieu-Daudé
2015-06-19 13:47 ` [Qemu-devel] [PULL 08/12] arm: xlnx-zynqmp: Preface CPU variables with "apu" Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 09/12] arm: xlnx-zynqmp: Add boot-cpu property Peter Maydell
2015-06-19 13:47 ` [Qemu-devel] [PULL 10/12] arm: xlnx-zynqmp: Add 2xCortexR5 CPUs Peter Maydell
2015-07-09 14:19 ` Paolo Bonzini
2015-06-19 13:47 ` Peter Maydell [this message]
2015-06-19 13:47 ` [Qemu-devel] [PULL 12/12] semihosting: add --semihosting-config arg sub-argument Peter Maydell
2015-06-19 17:32 ` [Qemu-devel] [PULL 00/12] target-arm queue Peter Maydell
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