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Diffstat (limited to 'agent/system/FreeBSD/tcf/context-freebsd.c')
-rw-r--r--agent/system/FreeBSD/tcf/context-freebsd.c659
1 files changed, 659 insertions, 0 deletions
diff --git a/agent/system/FreeBSD/tcf/context-freebsd.c b/agent/system/FreeBSD/tcf/context-freebsd.c
new file mode 100644
index 00000000..b5f4226d
--- /dev/null
+++ b/agent/system/FreeBSD/tcf/context-freebsd.c
@@ -0,0 +1,659 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2011 Wind River Systems, Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ * The Eclipse Public License is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ * You may elect to redistribute this code under either of these licenses.
+ *
+ * Contributors:
+ * Wind River Systems - initial API and implementation
+ *******************************************************************************/
+
+/*
+ * This module handles process/thread OS contexts and their state machine.
+ */
+
+#include <tcf/config.h>
+
+#if defined(__FreeBSD__)
+
+#if ENABLE_DebugContext && !ENABLE_ContextProxy
+
+#include <stdlib.h>
+#include <assert.h>
+#include <errno.h>
+#include <signal.h>
+#include <sched.h>
+#include <sys/ptrace.h>
+#include <tcf/framework/context.h>
+#include <tcf/framework/events.h>
+#include <tcf/framework/errors.h>
+#include <tcf/framework/trace.h>
+#include <tcf/framework/myalloc.h>
+#include <tcf/framework/waitpid.h>
+#include <tcf/framework/signames.h>
+#include <tcf/services/breakpoints.h>
+#include <system/FreeBSD/tcf/regset.h>
+
+#define PTRACE_TRACEME PT_TRACE_ME
+#define PTRACE_ATTACH PT_ATTACH
+#define PTRACE_GETREGS PT_GETREGS
+#define PTRACE_SETREGS PT_SETREGS
+#define PTRACE_PEEKDATA PT_READ_D
+#define PTRACE_POKEDATA PT_WRITE_D
+#define PTRACE_CONT PT_CONTINUE
+#define PTRACE_SINGLESTEP PT_STEP
+
+#define USE_PTRACE_SYSCALL 0
+
+typedef struct ContextExtensionBSD {
+ pid_t pid;
+ ContextAttachCallBack * attach_callback;
+ void * attach_data;
+ int ptrace_flags;
+ int ptrace_event;
+ int syscall_enter;
+ int syscall_exit;
+ int syscall_id;
+ ContextAddress syscall_pc;
+ ContextAddress loader_state;
+ int end_of_step;
+ REG_SET * regs; /* copy of context registers, updated when context stops */
+ ErrorReport * regs_error; /* if not NULL, 'regs' is invalid */
+ int regs_dirty; /* if not 0, 'regs' is modified and needs to be saved before context is continued */
+ int pending_step;
+} ContextExtensionBSD;
+
+static size_t context_extension_offset = 0;
+
+#define EXT(ctx) ((ContextExtensionBSD *)((char *)(ctx) + context_extension_offset))
+
+#include <tcf/framework/pid-hash.h>
+
+static LINK pending_list = TCF_LIST_INIT(pending_list);
+
+static MemoryErrorInfo mem_err_info;
+
+static const char * event_name(int event) {
+ trace(LOG_ALWAYS, "event_name(): unexpected event code %d", event);
+ return "unknown";
+}
+
+const char * context_suspend_reason(Context * ctx) {
+ static char reason[128];
+
+ if (EXT(ctx)->end_of_step) return REASON_STEP;
+ if (EXT(ctx)->ptrace_event != 0) {
+ assert(ctx->signal == SIGTRAP);
+ snprintf(reason, sizeof(reason), "Event: %s", event_name(EXT(ctx)->ptrace_event));
+ return reason;
+ }
+ if (ctx->signal == SIGSTOP || ctx->signal == SIGTRAP) return REASON_USER_REQUEST;
+ snprintf(reason, sizeof(reason), "Signal %d", ctx->signal);
+ return reason;
+}
+
+int context_attach_self(void) {
+ if (ptrace(PTRACE_TRACEME, 0, 0, 0) < 0) {
+ int err = errno;
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_TRACEME) failed: pid %d, error %d %s",
+ getpid(), err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ return 0;
+}
+
+int context_attach(pid_t pid, ContextAttachCallBack * done, void * data, int mode) {
+ Context * ctx = NULL;
+
+ assert(done != NULL);
+ trace(LOG_CONTEXT, "context: attaching pid %d", pid);
+ if ((mode & CONTEXT_ATTACH_SELF) == 0 && ptrace(PTRACE_ATTACH, pid, 0, 0) < 0) {
+ int err = errno;
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_ATTACH) failed: pid %d, error %d %s",
+ pid, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ add_waitpid_process(pid);
+ ctx = create_context(pid2id(pid, 0));
+ ctx->mem = ctx;
+ ctx->mem_access |= MEM_ACCESS_INSTRUCTION;
+ ctx->mem_access |= MEM_ACCESS_DATA;
+ ctx->mem_access |= MEM_ACCESS_USER;
+ ctx->big_endian = big_endian_host();
+ EXT(ctx)->pid = pid;
+ EXT(ctx)->attach_callback = done;
+ EXT(ctx)->attach_data = data;
+ list_add_first(&ctx->ctxl, &pending_list);
+ /* TODO: context_attach works only for main task in a process */
+ return 0;
+}
+
+int context_has_state(Context * ctx) {
+ return ctx != NULL && ctx->parent != NULL;
+}
+
+int context_stop(Context * ctx) {
+ trace(LOG_CONTEXT, "context:%s suspending ctx %#lx id %s",
+ ctx->pending_intercept ? "" : " temporary", ctx, ctx->id);
+ assert(is_dispatch_thread());
+ assert(!ctx->exited);
+ assert(!ctx->stopped);
+ assert(!EXT(ctx)->regs_dirty);
+ if (tkill(EXT(ctx)->pid, SIGSTOP) < 0) {
+ int err = errno;
+ if (err == ESRCH) {
+ ctx->exiting = 1;
+ return 0;
+ }
+ trace(LOG_ALWAYS, "error: tkill(SIGSTOP) failed: ctx %#lx, id %s, error %d %s",
+ ctx, ctx->id, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ return 0;
+}
+
+int context_continue(Context * ctx) {
+ int signal = 0;
+
+ assert(is_dispatch_thread());
+ assert(ctx->stopped);
+ assert(!ctx->pending_intercept);
+ assert(!EXT(ctx)->pending_step);
+ assert(!ctx->exited);
+
+ if (skip_breakpoint(ctx, 0)) return 0;
+
+ if (!EXT(ctx)->ptrace_event) {
+ while (ctx->pending_signals != 0) {
+ while ((ctx->pending_signals & (1 << signal)) == 0) signal++;
+ if (ctx->sig_dont_pass & (1 << signal)) {
+ ctx->pending_signals &= ~(1 << signal);
+ signal = 0;
+ }
+ else {
+ break;
+ }
+ }
+ assert(signal != SIGSTOP);
+ assert(signal != SIGTRAP);
+ }
+
+ trace(LOG_CONTEXT, "context: resuming ctx %#lx, id %s, with signal %d", ctx, ctx->id, signal);
+ if (EXT(ctx)->regs_dirty) {
+ if (ptrace(PTRACE_SETREGS, EXT(ctx)->pid, 0, (int)EXT(ctx)->regs) < 0) {
+ int err = errno;
+ if (err == ESRCH) {
+ EXT(ctx)->regs_dirty = 0;
+ send_context_started_event(ctx);
+ return 0;
+ }
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_SETREGS) failed: ctx %#lx, id %s, error %d %s",
+ ctx, ctx->id, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ EXT(ctx)->regs_dirty = 0;
+ }
+ if (ptrace(PTRACE_CONT, EXT(ctx)->pid, 0, signal) < 0) {
+ int err = errno;
+ if (err == ESRCH) {
+ send_context_started_event(ctx);
+ return 0;
+ }
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_CONT, ...) failed: ctx %#lx, id %s, error %d %s",
+ ctx, ctx->id, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ ctx->pending_signals &= ~(1 << signal);
+ send_context_started_event(ctx);
+ return 0;
+}
+
+int context_single_step(Context * ctx) {
+ assert(is_dispatch_thread());
+ assert(context_has_state(ctx));
+ assert(ctx->stopped);
+ assert(!ctx->exited);
+ assert(!EXT(ctx)->pending_step);
+
+ if (skip_breakpoint(ctx, 1)) return 0;
+
+ trace(LOG_CONTEXT, "context: single step ctx %#lx, id %s", ctx, ctx->id);
+ if (EXT(ctx)->regs_dirty) {
+ if (ptrace(PTRACE_SETREGS, EXT(ctx)->pid, 0, (int)EXT(ctx)->regs) < 0) {
+ int err = errno;
+ if (err == ESRCH) {
+ EXT(ctx)->regs_dirty = 0;
+ EXT(ctx)->pending_step = 1;
+ send_context_started_event(ctx);
+ return 0;
+ }
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_SETREGS) failed: ctx %#lx, id %s, error %d %s",
+ ctx, ctx->id, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ EXT(ctx)->regs_dirty = 0;
+ }
+ if (ptrace(PTRACE_SINGLESTEP, EXT(ctx)->pid, 0, 0) < 0) {
+ int err = errno;
+ if (err == ESRCH) {
+ EXT(ctx)->pending_step = 1;
+ send_context_started_event(ctx);
+ return 0;
+ }
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_SINGLESTEP, ...) failed: ctx %#lx, id %s, error %d %s",
+ ctx, ctx->id, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ EXT(ctx)->pending_step = 1;
+ send_context_started_event(ctx);
+ return 0;
+}
+
+int context_resume(Context * ctx, int mode, ContextAddress range_start, ContextAddress range_end) {
+ switch (mode) {
+ case RM_RESUME:
+ return context_continue(ctx);
+ case RM_STEP_INTO:
+ return context_single_step(ctx);
+ case RM_TERMINATE:
+ ctx->pending_signals |= 1 << SIGKILL;
+ return context_continue(ctx);
+ }
+ errno = ERR_UNSUPPORTED;
+ return -1;
+}
+
+int context_can_resume(Context * ctx, int mode) {
+ switch (mode) {
+ case RM_RESUME:
+ return 1;
+ case RM_STEP_INTO:
+ case RM_TERMINATE:
+ return context_has_state(ctx);
+ }
+ return 0;
+}
+
+int context_write_mem(Context * ctx, ContextAddress address, void * buf, size_t size) {
+ ContextAddress word_addr;
+ unsigned word_size = context_word_size(ctx);
+ assert(is_dispatch_thread());
+ assert(!ctx->exited);
+ trace(LOG_CONTEXT, "context: write memory ctx %#lx, id %s, address %#lx, size %zu",
+ ctx, ctx->id, address, size);
+ assert(word_size <= sizeof(unsigned long));
+ if (check_breakpoints_on_memory_write(ctx, address, buf, size) < 0) return -1;
+ for (word_addr = address & ~((ContextAddress)word_size - 1); word_addr < address + size; word_addr += word_size) {
+ unsigned long word = 0;
+ if (word_addr < address || word_addr + word_size > address + size) {
+ size_t i;
+ errno = 0;
+ word = ptrace(PTRACE_PEEKDATA, EXT(ctx)->pid, (char *)word_addr, 0);
+ if (errno != 0) {
+ int err = errno;
+ trace(LOG_CONTEXT, "error: ptrace(PTRACE_PEEKDATA, ...) failed: ctx %#lx, id %s, addr %#lx, error %d %s",
+ ctx, ctx->id, word_addr, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ for (i = 0; i < word_size; i++) {
+ if (word_addr + i >= address && word_addr + i < address + size) {
+ ((char *)&word)[i] = ((char *)buf)[word_addr + i - address];
+ }
+ }
+ }
+ else {
+ memcpy(&word, (char *)buf + (word_addr - address), word_size);
+ }
+ if (ptrace(PTRACE_POKEDATA, EXT(ctx)->pid, (char *)word_addr, word) < 0) {
+ int err = errno;
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_POKEDATA, ...) failed: ctx %#lx, id %s, addr %#lx, error %d %s",
+ ctx, ctx->id, word_addr, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int context_read_mem(Context * ctx, ContextAddress address, void * buf, size_t size) {
+ ContextAddress word_addr;
+ unsigned word_size = context_word_size(ctx);
+ assert(is_dispatch_thread());
+ assert(!ctx->exited);
+ trace(LOG_CONTEXT, "context: read memory ctx %#lx, id %s, address %#lx, size %zu",
+ ctx, ctx->id, address, size);
+ assert(word_size <= sizeof(unsigned long));
+ for (word_addr = address & ~((ContextAddress)word_size - 1); word_addr < address + size; word_addr += word_size) {
+ unsigned long word = 0;
+ errno = 0;
+ word = ptrace(PTRACE_PEEKDATA, EXT(ctx)->pid, (char *)word_addr, 0);
+ if (errno != 0) {
+ int err = errno;
+ trace(LOG_CONTEXT, "error: ptrace(PTRACE_PEEKDATA, ...) failed: ctx %#lx, id %s, addr %#lx, error %d %s",
+ ctx, ctx->id, word_addr, err, errno_to_str(err));
+ errno = err;
+ return -1;
+ }
+ if (word_addr < address || word_addr + word_size > address + size) {
+ size_t i;
+ for (i = 0; i < word_size; i++) {
+ if (word_addr + i >= address && word_addr + i < address + size) {
+ ((char *)buf)[word_addr + i - address] = ((char *)&word)[i];
+ }
+ }
+ }
+ else {
+ memcpy((char *)buf + (word_addr - address), &word, word_size);
+ }
+ }
+ return check_breakpoints_on_memory_read(ctx, address, buf, size);
+}
+
+#if ENABLE_ExtendedMemoryErrorReports
+int context_get_mem_error_info(MemoryErrorInfo * info) {
+ if (mem_err_info.error == 0) {
+ set_errno(ERR_OTHER, "Extended memory error info not available");
+ return -1;
+ }
+ *info = mem_err_info;
+ return 0;
+}
+#endif
+
+int context_write_reg(Context * ctx, RegisterDefinition * def, unsigned offs, unsigned size, void * buf) {
+ ContextExtensionBSD * ext = EXT(ctx);
+
+ assert(is_dispatch_thread());
+ assert(context_has_state(ctx));
+ assert(ctx->stopped);
+ assert(!ctx->exited);
+ assert(offs + size <= def->size);
+
+ if (ext->regs_error) {
+ set_error_report_errno(ext->regs_error);
+ return -1;
+ }
+ memcpy((uint8_t *)ext->regs + def->offset + offs, buf, size);
+ ext->regs_dirty = 1;
+ return 0;
+}
+
+int context_read_reg(Context * ctx, RegisterDefinition * def, unsigned offs, unsigned size, void * buf) {
+ ContextExtensionBSD * ext = EXT(ctx);
+
+ assert(is_dispatch_thread());
+ assert(context_has_state(ctx));
+ assert(ctx->stopped);
+ assert(!ctx->exited);
+ assert(offs + size <= def->size);
+
+ if (ext->regs_error) {
+ set_error_report_errno(ext->regs_error);
+ return -1;
+ }
+ memcpy(buf, (uint8_t *)ext->regs + def->offset + offs, size);
+ return 0;
+}
+
+unsigned context_word_size(Context * ctx) {
+ return sizeof(void *);
+}
+
+int context_get_canonical_addr(Context * ctx, ContextAddress addr,
+ Context ** canonical_ctx, ContextAddress * canonical_addr,
+ ContextAddress * block_addr, ContextAddress * block_size) {
+ /* Direct mapping, page size is irrelevant */
+ ContextAddress page_size = 0x100000;
+ assert(is_dispatch_thread());
+ *canonical_ctx = ctx->mem;
+ if (canonical_addr != NULL) *canonical_addr = addr;
+ if (block_addr != NULL) *block_addr = addr & ~(page_size - 1);
+ if (block_size != NULL) *block_size = page_size;
+ return 0;
+}
+
+Context * context_get_group(Context * ctx, int group) {
+ static Context * cpu_group = NULL;
+ switch (group) {
+ case CONTEXT_GROUP_INTERCEPT:
+ return ctx;
+ case CONTEXT_GROUP_CPU:
+ if (cpu_group == NULL) cpu_group = create_context("CPU");
+ return cpu_group;
+ }
+ return ctx->mem;
+}
+
+int context_get_supported_bp_access_types(Context * ctx) {
+ return 0;
+}
+
+int context_plant_breakpoint(ContextBreakpoint * bp) {
+ errno = ERR_UNSUPPORTED;
+ return -1;
+}
+
+int context_unplant_breakpoint(ContextBreakpoint * bp) {
+ errno = ERR_UNSUPPORTED;
+ return -1;
+}
+
+int context_get_memory_map(Context * ctx, MemoryMap * map) {
+ ctx = ctx->mem;
+ assert(!ctx->exited);
+ return 0;
+}
+
+static Context * find_pending(pid_t pid) {
+ LINK * l = pending_list.next;
+ while (l != &pending_list) {
+ Context * c = ctxl2ctxp(l);
+ if (EXT(c)->pid == pid) {
+ list_remove(&c->ctxl);
+ return c;
+ }
+ l = l->next;
+ }
+ return NULL;
+}
+
+static void event_pid_exited(pid_t pid, int status, int signal) {
+ Context * ctx;
+
+ ctx = context_find_from_pid(pid, 1);
+ if (ctx == NULL) {
+ ctx = find_pending(pid);
+ if (ctx == NULL) {
+ trace(LOG_EVENTS, "event: ctx not found, pid %d, exit status %d, term signal %d", pid, status, signal);
+ }
+ else {
+ assert(ctx->ref_count == 0);
+ if (EXT(ctx)->attach_callback != NULL) {
+ if (status == 0) status = EINVAL;
+ EXT(ctx)->attach_callback(status, ctx, EXT(ctx)->attach_data);
+ }
+ assert(list_is_empty(&ctx->children));
+ assert(ctx->parent == NULL);
+ ctx->exited = 1;
+ ctx->ref_count = 1;
+ context_unlock(ctx);
+ }
+ }
+ else {
+ /* Note: ctx->exiting should be 1 here. However, PTRACE_EVENT_EXIT can be lost by PTRACE because of racing
+ * between PTRACE_CONT (or PTRACE_SYSCALL) and SIGTRAP/PTRACE_EVENT_EXIT. So, ctx->exiting can be 0.
+ */
+ if (EXT(ctx->parent)->pid == pid) ctx = ctx->parent;
+ assert(EXT(ctx)->attach_callback == NULL);
+ if (ctx->exited) {
+ trace(LOG_EVENTS, "event: ctx %#lx, pid %d, exit status %d unexpected, stopped %d, exited %d",
+ ctx, pid, status, ctx->stopped, ctx->exited);
+ }
+ else {
+ trace(LOG_EVENTS, "event: ctx %#lx, pid %d, exit status %d, term signal %d", ctx, pid, status, signal);
+ ctx->exiting = 1;
+ if (ctx->stopped) send_context_started_event(ctx);
+ if (!list_is_empty(&ctx->children)) {
+ LINK * l = ctx->children.next;
+ while (l != &ctx->children) {
+ Context * c = cldl2ctxp(l);
+ l = l->next;
+ assert(c->parent == ctx);
+ if (!c->exited) {
+ c->exiting = 1;
+ if (c->stopped) send_context_started_event(c);
+ release_error_report(EXT(c)->regs_error);
+ loc_free(EXT(c)->regs);
+ EXT(c)->regs_error = NULL;
+ EXT(c)->regs = NULL;
+ send_context_exited_event(c);
+ }
+ }
+ }
+ release_error_report(EXT(ctx)->regs_error);
+ loc_free(EXT(ctx)->regs);
+ EXT(ctx)->regs_error = NULL;
+ EXT(ctx)->regs = NULL;
+ send_context_exited_event(ctx);
+ }
+ }
+}
+
+static void event_pid_stopped(pid_t pid, int signal, int event, int syscall) {
+ int stopped_by_exception = 0;
+ Context * ctx = NULL;
+
+ trace(LOG_EVENTS, "event: pid %d stopped, signal %d, event %s", pid, signal, event_name(event));
+
+ ctx = context_find_from_pid(pid, 1);
+
+ if (ctx == NULL) {
+ ctx = find_pending(pid);
+ if (ctx != NULL) {
+ Context * prs = ctx;
+ assert(prs->ref_count == 0);
+ ctx = create_context(pid2id(pid, pid));
+ EXT(ctx)->pid = pid;
+ EXT(ctx)->regs = (REG_SET *)loc_alloc(sizeof(REG_SET));
+ ctx->pending_intercept = 1;
+ ctx->mem = prs;
+ ctx->parent = prs;
+ ctx->big_endian = prs->big_endian;
+ prs->ref_count++;
+ list_add_last(&ctx->cldl, &prs->children);
+ link_context(prs);
+ link_context(ctx);
+ send_context_created_event(prs);
+ send_context_created_event(ctx);
+ if (EXT(prs)->attach_callback) {
+ EXT(prs)->attach_callback(0, prs, EXT(prs)->attach_data);
+ EXT(prs)->attach_callback = NULL;
+ EXT(prs)->attach_data = NULL;
+ }
+ }
+ }
+
+ if (ctx == NULL) return;
+
+ assert(!ctx->exited);
+ assert(!EXT(ctx)->attach_callback);
+
+ if (signal != SIGSTOP && signal != SIGTRAP) {
+ assert(signal < 32);
+ ctx->pending_signals |= 1 << signal;
+ if ((ctx->sig_dont_stop & (1 << signal)) == 0) {
+ ctx->pending_intercept = 1;
+ stopped_by_exception = 1;
+ }
+ }
+
+ if (ctx->stopped) {
+ send_context_changed_event(ctx);
+ }
+ else {
+ ContextAddress pc0 = 0;
+ ContextAddress pc1 = 0;
+
+ assert(!EXT(ctx)->regs_dirty);
+
+ EXT(ctx)->end_of_step = 0;
+ EXT(ctx)->ptrace_event = event;
+ ctx->signal = signal;
+ ctx->stopped_by_bp = 0;
+ ctx->stopped_by_exception = stopped_by_exception;
+ ctx->stopped = 1;
+
+ if (EXT(ctx)->regs_error) {
+ release_error_report(EXT(ctx)->regs_error);
+ EXT(ctx)->regs_error = NULL;
+ }
+ else {
+ pc0 = get_regs_PC(ctx);
+ }
+
+ if (ptrace(PTRACE_GETREGS, EXT(ctx)->pid, 0, (int)EXT(ctx)->regs) < 0) {
+ assert(errno != 0);
+ if (errno == ESRCH) {
+ /* Racing condition: somebody resumed this context while we are handling stop event.
+ *
+ * One possible cause: main thread has exited forcing children to exit too.
+ * I beleive it is a bug in PTRACE implementation - PTRACE should delay exiting of
+ * a context while it is stopped, but it does not, which causes a nasty racing.
+ *
+ * Workaround: Ignore current event, assume context is running.
+ */
+ ctx->stopped = 0;
+ return;
+ }
+ EXT(ctx)->regs_error = get_error_report(errno);
+ trace(LOG_ALWAYS, "error: ptrace(PTRACE_GETREGS) failed; id %s, error %d %s",
+ ctx->id, errno, errno_to_str(errno));
+ }
+ else {
+ pc1 = get_regs_PC(ctx);
+ }
+
+ trace(LOG_EVENTS, "event: pid %d stopped at PC = %#lx", pid, pc1);
+
+ if (signal == SIGTRAP && event == 0 && !syscall) {
+ size_t break_size = 0;
+ get_break_instruction(ctx, &break_size);
+ ctx->stopped_by_bp = !EXT(ctx)->regs_error && is_breakpoint_address(ctx, pc1 - break_size);
+ EXT(ctx)->end_of_step = !ctx->stopped_by_bp && EXT(ctx)->pending_step;
+ if (ctx->stopped_by_bp) set_regs_PC(ctx, pc1 - break_size);
+ }
+ EXT(ctx)->pending_step = 0;
+ send_context_stopped_event(ctx);
+ }
+}
+
+static void waitpid_listener(int pid, int exited, int exit_code, int signal, int event_code, int syscall, void * args) {
+ if (exited) {
+ event_pid_exited(pid, exit_code, signal);
+ }
+ else {
+ event_pid_stopped(pid, signal, event_code, syscall);
+ }
+}
+
+void init_contexts_sys_dep(void) {
+ context_extension_offset = context_extension(sizeof(ContextExtensionBSD));
+ add_waitpid_listener(waitpid_listener, NULL);
+ ini_context_pid_hash();
+}
+
+#endif /* if ENABLE_DebugContext */
+#endif /* __FreeBSD__ */

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