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GDB monitor: add support for register writing

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With this patch, register contents of a paused thread (which is not
currently executing a syscall) can get modified on Fiasco.OC by GDB.

Fixes #897.
This commit is contained in:
Christian Prochaska 2013-10-01 17:39:27 +02:00 committed by Norman Feske
parent 9090311a06
commit 65f8f9c75a
11 changed files with 272 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
ports/src/app/gdb_monitor/gdbserver/genode-low.h
View File

@ -32,6 +32,7 @@ ptid_t genode_wait_for_signal_or_gdb_interrupt(struct target_waitstatus *status)
void genode_continue_thread(unsigned long lwpid, int single_step);
int genode_fetch_register(int regno, unsigned long *reg_content);
void genode_store_register(int regno, unsigned long reg_content);
unsigned char genode_read_memory_byte(void *addr);
void genode_write_memory_byte(void *addr, unsigned char value);

214
ports/src/app/gdb_monitor/gdbserver_genode.patch
View File

@ -1,6 +1,20 @@
- Genode-specific changes of gdbserver files
gdbserver_genode.patch
From: Christian Prochaska <christian.prochaska@genode-labs.com>
---
gdb/gdbserver/linux-arm-low.c | 4 +
gdb/gdbserver/linux-low.c | 223 ++++++++++++++++++++++++++++++++++-------
gdb/gdbserver/linux-low.h | 5 +
gdb/gdbserver/linux-x86-low.c | 43 +++++++-
gdb/gdbserver/remote-utils.c | 80 +++++++++++++++
gdb/gdbserver/server.c | 52 ++++++++--
gdb/gdbserver/server.h | 4 -
7 files changed, 356 insertions(+), 55 deletions(-)
diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
index babb20c..d14c8cc 100644
--- a/gdb/gdbserver/linux-arm-low.c
+++ b/gdb/gdbserver/linux-arm-low.c
@@ -25,6 +25,7 @@
@ -11,7 +25,7 @@ diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
#include <sys/ptrace.h>
/* Defined in auto-generated files. */
@@ -306,6 +307,7 @@
@@ -306,6 +307,7 @@ static void
arm_arch_setup (void)
{
arm_hwcap = 0;
@ -19,7 +33,7 @@ diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
if (arm_get_hwcap (&arm_hwcap) == 0)
{
init_registers_arm ();
@@ -347,7 +349,7 @@
@@ -347,7 +349,7 @@ arm_arch_setup (void)
return;
}
@ -29,6 +43,7 @@ diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
simulated. */
init_registers_arm ();
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 81b8540..5b31da5 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -19,6 +19,7 @@
@ -39,7 +54,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
#include <sys/wait.h>
#include <stdio.h>
@@ -281,6 +282,7 @@
@@ -281,6 +282,7 @@ elf_64_file_p (const char *file)
static void
delete_lwp (struct lwp_info *lwp)
{
@ -47,7 +62,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
remove_thread (get_lwp_thread (lwp));
remove_inferior (&all_lwps, &lwp->head);
free (lwp->arch_private);
@@ -535,6 +537,8 @@
@@ -535,6 +537,8 @@ get_stop_pc (struct lwp_info *lwp)
static void *
add_lwp (ptid_t ptid)
{
@ -56,7 +71,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
struct lwp_info *lwp;
lwp = (struct lwp_info *) xmalloc (sizeof (*lwp));
@@ -547,6 +551,9 @@
@@ -547,6 +551,9 @@ add_lwp (ptid_t ptid)
add_inferior_to_list (&all_lwps, &lwp->head);
@ -66,7 +81,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
return lwp;
}
@@ -606,6 +613,7 @@
@@ -606,6 +613,7 @@ linux_attach_lwp_1 (unsigned long lwpid, int initial)
ptid_t ptid;
struct lwp_info *new_lwp;
@ -74,7 +89,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
if (ptrace (PTRACE_ATTACH, lwpid, 0, 0) != 0)
{
if (!initial)
@@ -621,6 +629,7 @@
@@ -621,6 +629,7 @@ linux_attach_lwp_1 (unsigned long lwpid, int initial)
error ("Cannot attach to lwp %ld: %s (%d)\n", lwpid,
strerror (errno), errno);
}
@ -82,7 +97,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
if (initial)
/* NOTE/FIXME: This lwp might have not been the tgid. */
@@ -637,10 +646,11 @@
@@ -637,10 +646,11 @@ linux_attach_lwp_1 (unsigned long lwpid, int initial)
new_lwp = (struct lwp_info *) add_lwp (ptid);
add_thread (ptid, new_lwp);
@ -95,7 +110,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
/* The next time we wait for this LWP we'll see a SIGSTOP as PTRACE_ATTACH
brings it to a halt.
@@ -689,6 +699,10 @@
@@ -689,6 +699,10 @@ linux_attach (unsigned long pid)
linux_attach_lwp_1 (pid, 1);
linux_add_process (pid, 1);
@ -106,7 +121,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
if (!non_stop)
{
struct thread_info *thread;
@@ -698,7 +712,7 @@
@@ -698,7 +712,7 @@ linux_attach (unsigned long pid)
thread = find_thread_ptid (ptid_build (pid, pid, 0));
thread->last_resume_kind = resume_stop;
}
@ -115,7 +130,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
return 0;
}
@@ -812,7 +826,11 @@
@@ -812,7 +826,11 @@ linux_kill (int pid)
return 0;
}
@ -127,7 +142,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
linux_detach_one_lwp (struct inferior_list_entry *entry, void *args)
{
struct thread_info *thread = (struct thread_info *) entry;
@@ -822,6 +840,7 @@
@@ -822,6 +840,7 @@ linux_detach_one_lwp (struct inferior_list_entry *entry, void *args)
if (ptid_get_pid (entry->id) != pid)
return 0;
@ -135,7 +150,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
/* If this process is stopped but is expecting a SIGSTOP, then make
sure we take care of that now. This isn't absolutely guaranteed
to collect the SIGSTOP, but is fairly likely to. */
@@ -833,13 +852,15 @@
@@ -833,13 +852,15 @@ linux_detach_one_lwp (struct inferior_list_entry *entry, void *args)
linux_resume_one_lwp (lwp, 0, 0, NULL);
linux_wait_for_event (lwp->head.id, &wstat, __WALL);
}
@ -152,7 +167,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
delete_lwp (lwp);
return 0;
@@ -2460,6 +2481,13 @@
@@ -2460,6 +2481,13 @@ async_file_mark (void)
be awakened anyway. */
}
@ -166,7 +181,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
static ptid_t
linux_wait (ptid_t ptid,
struct target_waitstatus *ourstatus, int target_options)
@@ -2469,18 +2497,28 @@
@@ -2469,18 +2497,28 @@ linux_wait (ptid_t ptid,
if (debug_threads)
fprintf (stderr, "linux_wait: [%s]\n", target_pid_to_str (ptid));
@ -174,18 +189,16 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
/* Flush the async file first. */
if (target_is_async_p ())
async_file_flush ();
-
+#endif
+
+#ifdef __GENODE__
+ /* TODO: get some information from wait_for_signal_or_gdb_interrupt() */
+ event_ptid = genode_wait_for_signal_or_gdb_interrupt(ourstatus);
+ find_inferior (&all_lwps, mark_as_stopped, NULL);
+#else
event_ptid = linux_wait_1 (ptid, ourstatus, target_options);
-
+#endif
+
+#ifndef __GENODE__
/* If at least one stop was reported, there may be more. A single
SIGCHLD can signal more than one child stop. */
@ -197,7 +210,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
return event_ptid;
}
@@ -2785,6 +2823,8 @@
@@ -2785,6 +2823,8 @@ static void
linux_resume_one_lwp (struct lwp_info *lwp,
int step, int signal, siginfo_t *info)
{
@ -206,7 +219,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
struct thread_info *saved_inferior;
int fast_tp_collecting;
@@ -2958,10 +2998,15 @@
@@ -2958,10 +2998,15 @@ lwp %ld wants to get out of fast tracepoint jump pad single-stepping\n",
lwp->stopped = 0;
lwp->stopped_by_watchpoint = 0;
lwp->stepping = step;
@ -222,7 +235,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
current_inferior = saved_inferior;
if (errno)
@@ -3325,6 +3370,8 @@
@@ -3325,6 +3370,8 @@ finish_step_over (struct lwp_info *lwp)
static int
linux_resume_one_thread (struct inferior_list_entry *entry, void *arg)
{
@ -231,7 +244,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
struct lwp_info *lwp;
struct thread_info *thread;
int step;
@@ -3436,6 +3483,8 @@
@@ -3436,6 +3483,8 @@ linux_resume_one_thread (struct inferior_list_entry *entry, void *arg)
static void
linux_resume (struct thread_resume *resume_info, size_t n)
{
@ -240,7 +253,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
struct thread_resume_array array = { resume_info, n };
struct lwp_info *need_step_over = NULL;
int any_pending;
@@ -3484,6 +3533,8 @@
@@ -3484,6 +3533,8 @@ linux_resume (struct thread_resume *resume_info, size_t n)
if (need_step_over)
start_step_over (need_step_over);
@ -249,43 +262,63 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
}
/* This function is called once per thread. We check the thread's
@@ -3958,6 +4009,22 @@
@@ -3958,6 +4009,26 @@ linux_fetch_registers (struct regcache *regcache, int regno)
#endif
}
+static void
+genode_fetch_registers (struct regcache *regcache, int regno)
+{
+ unsigned long reg_content = 0;
+ unsigned long reg_content = 0;
+
+ if (regno == -1) {
+ for (regno = 0; regno < the_low_target.num_regs; regno++) {
+ if (genode_fetch_register(regno, &reg_content) == 0)
+ supply_register(regcache, regno, &reg_content);
+ }
+ } else {
+ if (genode_fetch_register(regno, &reg_content) == 0)
+ supply_register(regcache, regno, &reg_content);
+ }
+ if (regno == -1) {
+ for (regno = 0; regno < the_low_target.num_regs; regno++) {
+ if (genode_fetch_register(regno, &reg_content) == 0)
+ supply_register(regcache, regno, &reg_content);
+ else
+ supply_register(regcache, regno, 0);
+ }
+ } else {
+ if (genode_fetch_register(regno, &reg_content) == 0)
+ supply_register(regcache, regno, &reg_content);
+ else
+ supply_register(regcache, regno, 0);
+ }
+}
+
void
linux_store_registers (struct regcache *regcache, int regno)
{
@@ -3970,6 +4037,12 @@
@@ -3970,6 +4041,28 @@ linux_store_registers (struct regcache *regcache, int regno)
#endif
}
+void
+genode_store_registers (struct regcache *regcache, int regno)
+{
+ printf("genode_store_registers() - not yet implemented\n");
+ if (debug_threads) printf("genode_store_registers(): regno = %d\n", regno);
+
+ unsigned long reg_content = 0;
+
+ if (regno == -1) {
+ for (regno = 0; regno < the_low_target.num_regs; regno++) {
+ if (register_size(regno) <= sizeof(reg_content)) {
+ collect_register(regcache, regno, &reg_content);
+ genode_store_register(regno, reg_content);
+ }
+ }
+ } else {
+ if (register_size(regno) <= sizeof(reg_content)) {
+ collect_register(regcache, regno, &reg_content);
+ genode_store_register(regno, reg_content);
+ }
+ }
+}
+
/* Copy LEN bytes from inferior's memory starting at MEMADDR
to debugger memory starting at MYADDR. */
@@ -4040,6 +4113,17 @@
@@ -4040,6 +4133,17 @@ linux_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
return 0;
}
@ -303,7 +336,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
/* Copy LEN bytes of data from debugger memory at MYADDR to inferior's
memory at MEMADDR. On failure (cannot write to the inferior)
returns the value of errno. */
@@ -4121,6 +4205,17 @@
@@ -4121,6 +4225,34 @@ linux_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
return 0;
}
@ -311,17 +344,34 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
+genode_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
+{
+ int i;
+ if (debug_threads) printf("genode_write_memory(%llx, %p, %d)\n", memaddr, myaddr, len);
+ if (myaddr)
+
+ if (debug_threads)
+ printf("genode_write_memory(%llx, %p, %d)\n", memaddr, myaddr, len);
+
+ if (myaddr && (len > 0)) {
+ if (debug_threads)
+ {
+ /* Dump up to four bytes. */
+ unsigned int val = * (unsigned int *) myaddr;
+ if (len == 1)
+ val = val & 0xff;
+ else if (len == 2)
+ val = val & 0xffff;
+ else if (len == 3)
+ val = val & 0xffffff;
+ fprintf (stderr, "Writing %0*x to 0x%08lx\n", 2 * ((len < 4) ? len : 4),
+ val, (long)memaddr);
+ }
+ for (i = 0; i < len; i++)
+ genode_write_memory_byte((void*)(unsigned long)memaddr + i, myaddr[i]);
+ }
+ return 0;
+}
+
/* Non-zero if the kernel supports PTRACE_O_TRACEFORK. */
static int linux_supports_tracefork_flag;
@@ -4296,6 +4391,10 @@
@@ -4296,6 +4428,10 @@ linux_look_up_symbols (void)
static void
linux_request_interrupt (void)
{
@ -332,7 +382,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
extern unsigned long signal_pid;
if (!ptid_equal (cont_thread, null_ptid)
@@ -4306,10 +4405,19 @@
@@ -4306,10 +4442,19 @@ linux_request_interrupt (void)
lwp = get_thread_lwp (current_inferior);
lwpid = lwpid_of (lwp);
@ -353,7 +403,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
}
/* Copy LEN bytes from inferior's auxiliary vector starting at OFFSET
@@ -5108,28 +5216,28 @@
@@ -5108,28 +5253,28 @@ linux_emit_ops (void)
}
static struct target_ops linux_target_ops = {
@ -395,7 +445,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
#if defined(__UCLIBC__) && defined(HAS_NOMMU)
linux_read_offsets,
#else
@@ -5140,32 +5248,32 @@
@@ -5140,32 +5285,32 @@ static struct target_ops linux_target_ops = {
#else
NULL,
#endif
@ -448,7 +498,7 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
};
static void
@@ -5181,11 +5289,14 @@
@@ -5181,11 +5326,14 @@ linux_init_signals ()
void
initialize_low (void)
{
@ -463,13 +513,14 @@ diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
linux_init_signals ();
linux_test_for_tracefork ();
#ifdef HAVE_LINUX_REGSETS
@@ -5198,4 +5309,5 @@
@@ -5198,4 +5346,5 @@ initialize_low (void)
sigemptyset (&sigchld_action.sa_mask);
sigchld_action.sa_flags = SA_RESTART;
sigaction (SIGCHLD, &sigchld_action, NULL);
+#endif
}
diff --git a/gdb/gdbserver/linux-low.h b/gdb/gdbserver/linux-low.h
index 6635bc6..ae172bd 100644
--- a/gdb/gdbserver/linux-low.h
+++ b/gdb/gdbserver/linux-low.h
@@ -21,7 +21,7 @@
@ -481,7 +532,7 @@ diff --git a/gdb/gdbserver/linux-low.h b/gdb/gdbserver/linux-low.h
#ifdef HAVE_LINUX_REGSETS
typedef void (*regset_fill_func) (struct regcache *, void *);
@@ -56,6 +56,9 @@
@@ -56,6 +56,9 @@ struct process_info_private
/* libthread_db-specific additions. Not NULL if this process has loaded
thread_db, and it is active. */
struct thread_db *thread_db;
@ -492,6 +543,7 @@ diff --git a/gdb/gdbserver/linux-low.h b/gdb/gdbserver/linux-low.h
struct lwp_info;
diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
index 69c6b57..cffa803 100644
--- a/gdb/gdbserver/linux-x86-low.c
+++ b/gdb/gdbserver/linux-x86-low.c
@@ -28,8 +28,15 @@
@ -499,8 +551,9 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
#include "elf/common.h"
-#include "gdb_proc_service.h"
-
+//#include "gdb_proc_service.h"
+
+#ifdef __GENODE__
+/* Defined in auto-generated file i386.c. */
+void init_registers_i386 (void);
@ -511,7 +564,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
/* Defined in auto-generated file i386-linux.c. */
void init_registers_i386_linux (void);
/* Defined in auto-generated file amd64-linux.c. */
@@ -40,11 +47,22 @@
@@ -40,11 +47,22 @@ void init_registers_i386_avx_linux (void);
void init_registers_amd64_avx_linux (void);
/* Defined in auto-generated file i386-mmx-linux.c. */
void init_registers_i386_mmx_linux (void);
@ -534,7 +587,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
static const char *xmltarget_i386_linux_no_xml = "@<target>\
<architecture>i386</architecture>\
<osabi>GNU/Linux</osabi>\
@@ -56,8 +74,15 @@
@@ -56,8 +74,15 @@ static const char *xmltarget_amd64_linux_no_xml = "@<target>\
<osabi>GNU/Linux</osabi>\
</target>";
#endif
@ -550,7 +603,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
#include <sys/procfs.h>
#include <sys/ptrace.h>
#include <sys/uio.h>
@@ -273,8 +298,10 @@
@@ -273,8 +298,10 @@ x86_fill_gregset (struct regcache *regcache, void *buf)
for (i = 0; i < I386_NUM_REGS; i++)
collect_register (regcache, i, ((char *) buf) + i386_regmap[i]);
@ -561,7 +614,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
}
static void
@@ -295,8 +322,10 @@
@@ -295,8 +322,10 @@ x86_store_gregset (struct regcache *regcache, const void *buf)
for (i = 0; i < I386_NUM_REGS; i++)
supply_register (regcache, i, ((char *) buf) + i386_regmap[i]);
@ -572,7 +625,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
}
static void
@@ -414,7 +443,15 @@
@@ -414,7 +443,15 @@ x86_set_pc (struct regcache *regcache, CORE_ADDR pc)
}
}
@ -588,7 +641,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
#define x86_breakpoint_len 1
static int
@@ -2576,7 +2613,7 @@
@@ -2576,7 +2613,7 @@ struct linux_target_ops the_low_target =
x86_siginfo_fixup,
x86_linux_new_process,
x86_linux_new_thread,
@ -598,6 +651,7 @@ diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
x86_supports_tracepoints,
x86_get_thread_area,
diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
index 650ddf8..046dd2e 100644
--- a/gdb/gdbserver/remote-utils.c
+++ b/gdb/gdbserver/remote-utils.c
@@ -18,11 +18,14 @@
@ -615,7 +669,7 @@ diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
@@ -171,7 +174,6 @@
@@ -171,7 +174,6 @@ handle_accept_event (int err, gdb_client_data client_data)
#ifndef USE_WIN32API
close (listen_desc); /* No longer need this */
@ -623,7 +677,7 @@ diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
exits when the remote side dies. */
#else
@@ -186,6 +188,12 @@
@@ -186,6 +188,12 @@ handle_accept_event (int err, gdb_client_data client_data)
enable_async_notification (remote_desc);
@ -636,7 +690,7 @@ diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
/* Register the event loop handler. */
add_file_handler (remote_desc, handle_serial_event, NULL);
@@ -280,6 +288,14 @@
@@ -280,6 +288,14 @@ remote_open (char *name)
/* Register the event loop handler. */
add_file_handler (remote_desc, handle_serial_event, NULL);
@ -651,7 +705,7 @@ diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
#endif /* USE_WIN32API */
}
else
@@ -857,6 +873,68 @@
@@ -857,6 +873,68 @@ input_interrupt (int unused)
}
}
@ -721,6 +775,7 @@ diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
void
check_remote_input_interrupt_request (void)
diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index 2f4484f..79c89d4 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -18,8 +18,13 @@
@ -737,7 +792,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
@@ -47,7 +52,7 @@
@@ -47,7 +52,7 @@ static char **program_argv, **wrapper_argv;
/* Enable miscellaneous debugging output. The name is historical - it
was originally used to debug LinuxThreads support. */
@ -746,7 +801,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
/* Enable debugging of h/w breakpoint/watchpoint support. */
int debug_hw_points;
@@ -1740,6 +1745,7 @@
@@ -1740,6 +1745,7 @@ static void gdb_wants_all_threads_stopped (void);
void
handle_v_cont (char *own_buf)
{
@ -754,7 +809,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
char *p, *q;
int n = 0, i = 0;
struct thread_resume *resume_info;
@@ -2055,11 +2061,11 @@
@@ -2055,11 +2061,11 @@ handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
return;
}
}
@ -768,7 +823,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
if (strncmp (own_buf, "vAttach;", 8) == 0)
{
if (!multi_process && target_running ())
@@ -2114,6 +2120,7 @@
@@ -2114,6 +2120,7 @@ handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
static void
myresume (char *own_buf, int step, int sig)
{
@ -776,7 +831,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
struct thread_resume resume_info[2];
int n = 0;
int valid_cont_thread;
@@ -2250,6 +2257,7 @@
@@ -2250,6 +2257,7 @@ gdb_reattached_process (struct inferior_list_entry *entry)
static void
handle_status (char *own_buf)
{
@ -784,7 +839,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
/* GDB is connected, don't forward events to the target anymore. */
for_each_inferior (&all_processes, gdb_reattached_process);
@@ -2286,7 +2294,7 @@
@@ -2286,7 +2294,7 @@ handle_status (char *own_buf)
strcpy (own_buf, "W00");
}
}
@ -793,7 +848,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
static void
gdbserver_version (void)
{
@@ -2328,7 +2336,7 @@
@@ -2328,7 +2336,7 @@ gdbserver_show_disableable (FILE *stream)
"T stop reply packet\n"
" threads \tAll of the above\n");
}
@ -802,7 +857,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
#undef require_running
#define require_running(BUF) \
@@ -2449,8 +2457,9 @@
@@ -2449,8 +2457,9 @@ join_inferiors_callback (struct inferior_list_entry *entry)
}
int
@ -813,7 +868,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
int bad_attach;
int pid;
char *arg_end, *port;
@@ -2584,7 +2593,7 @@
@@ -2584,7 +2593,7 @@ main (int argc, char *argv[])
gdbserver_usage (stderr);
exit (1);
}
@ -822,7 +877,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
initialize_inferiors ();
initialize_async_io ();
initialize_low ();
@@ -2594,6 +2603,7 @@
@@ -2594,6 +2603,7 @@ main (int argc, char *argv[])
own_buf = xmalloc (PBUFSIZ + 1);
mem_buf = xmalloc (PBUFSIZ);
@ -830,7 +885,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
if (pid == 0 && *next_arg != NULL)
{
int i, n;
@@ -2647,6 +2657,12 @@
@@ -2647,6 +2657,12 @@ main (int argc, char *argv[])
fprintf (stderr, "No program to debug. GDBserver exiting.\n");
exit (1);
}
@ -843,7 +898,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
while (1)
{
@@ -2655,6 +2671,15 @@
@@ -2655,6 +2671,15 @@ main (int argc, char *argv[])
/* Be sure we're out of tfind mode. */
current_traceframe = -1;
@ -859,15 +914,15 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
remote_open (port);
if (setjmp (toplevel) != 0)
@@ -2755,6 +2780,7 @@
@@ -2755,6 +2780,7 @@ process_serial_event (void)
i = 0;
ch = own_buf[i++];
+ if (debug_threads) printf("GDB command = %s\n", own_buf);
+ //if (debug_threads) printf("GDB command = %s\n", own_buf);
switch (ch)
{
case 'q':
@@ -2844,7 +2870,9 @@
@@ -2844,7 +2870,9 @@ process_serial_event (void)
gone. */
for_each_inferior (&all_processes,
join_inferiors_callback);
@ -877,7 +932,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
}
}
break;
@@ -3076,7 +3104,11 @@
@@ -3076,7 +3104,11 @@ process_serial_event (void)
return 0;
}
else
@ -889,7 +944,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
case 'T':
{
@@ -3140,14 +3172,14 @@
@@ -3140,14 +3172,14 @@ process_serial_event (void)
own_buf[0] = '\0';
break;
}
@ -906,7 +961,7 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
if (!extended_protocol && have_ran && !target_running ())
{
/* In non-stop, defer exiting until GDB had a chance to query
@@ -3159,7 +3191,7 @@
@@ -3159,7 +3191,7 @@ process_serial_event (void)
exit (0);
}
}
@ -916,9 +971,10 @@ diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
return -1;
diff --git a/gdb/gdbserver/server.h b/gdb/gdbserver/server.h
index 77f5dd6..897abed 100644
--- a/gdb/gdbserver/server.h
+++ b/gdb/gdbserver/server.h
@@ -664,8 +664,8 @@
@@ -664,8 +664,8 @@ struct emit_ops
/* Returns the address of the get_raw_reg function in the IPA. */
CORE_ADDR get_raw_reg_func_addr (void);

7
ports/src/lib/gdbserver_platform/fiasco_x86_low.cc
View File

@ -73,3 +73,10 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
PDBG("not implemented yet for this platform");
}

55
ports/src/lib/gdbserver_platform/foc_arm_low.cc
View File

@ -67,8 +67,12 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
case R9: PDBG("cannot determine contents of register R9"); return -1;
case R10: PDBG("cannot determine contents of register R10"); return -1;
case R11:
/* When in a syscall, the user FP is SP+28+8 */
*reg_content = thread_state.sp + 28 + 8;
/* R11 can be calculated from SP. The offset can be found in
* the disassembled 'Fiasco::l4_ipc()' function:
* add r11, sp, #8 -> r11 = sp + 8
* sub sp, sp, #20 -> r11 = (sp + 20) + 8
*/
*reg_content = (thread_state.sp + 20) + 8;
PDBG("FP = %8lx", *reg_content);
return 0;
case R12: PDBG("cannot determine contents of register R12"); return -1;
@ -120,3 +124,50 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
Thread_state thread_state;
try { thread_state = get_current_thread_state(); }
catch (...) { return; }
if (in_syscall(thread_state)) {
PDBG("cannot set registers while thread is in syscall");
return;
}
switch((enum reg_index)regno)
{
case R0: thread_state.r0 = reg_content; PDBG("R0 = %8lx", reg_content); break;
case R1: thread_state.r1 = reg_content; PDBG("R1 = %8lx", reg_content); break;
case R2: thread_state.r2 = reg_content; PDBG("R2 = %8lx", reg_content); break;
case R3: thread_state.r3 = reg_content; PDBG("R3 = %8lx", reg_content); break;
case R4: thread_state.r4 = reg_content; PDBG("R4 = %8lx", reg_content); break;
case R5: thread_state.r5 = reg_content; PDBG("R5 = %8lx", reg_content); break;
case R6: thread_state.r6 = reg_content; PDBG("R6 = %8lx", reg_content); break;
case R7: thread_state.r7 = reg_content; PDBG("R7 = %8lx", reg_content); break;
case R8: thread_state.r8 = reg_content; PDBG("R8 = %8lx", reg_content); break;
case R9: thread_state.r9 = reg_content; PDBG("R9 = %8lx", reg_content); break;
case R10: thread_state.r10 = reg_content; PDBG("R10 = %8lx", reg_content); break;
case R11: thread_state.r11 = reg_content; PDBG("FP = %8lx", reg_content); break;
case R12: thread_state.r12 = reg_content; PDBG("R12 = %8lx", reg_content); break;
case SP: thread_state.sp = reg_content; PDBG("SP = %8lx", reg_content); break;
case LR: thread_state.lr = reg_content; PDBG("LR = %8lx", reg_content); break;
case PC: thread_state.ip = reg_content; PDBG("PC = %8lx", reg_content); break;
case F0: PDBG("cannot set contents of register F0"); break;
case F1: PDBG("cannot set contents of register F1"); break;
case F2: PDBG("cannot set contents of register F2"); break;
case F3: PDBG("cannot set contents of register F3"); break;
case F4: PDBG("cannot set contents of register F4"); break;
case F5: PDBG("cannot set contents of register F5"); break;
case F6: PDBG("cannot set contents of register F6"); break;
case F7: PDBG("cannot set contents of register F7"); break;
case FPS: PDBG("cannot set contents of register FPS"); break;
case CPSR: thread_state.cpsr = reg_content; PDBG("CPSR = %8lx", reg_content); break;
}
set_current_thread_state(thread_state);
}

37
ports/src/lib/gdbserver_platform/foc_x86_32_low.cc
View File

@ -109,3 +109,40 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
Thread_state thread_state;
try { thread_state = get_current_thread_state(); }
catch (...) { return; }
if (in_syscall(thread_state)) {
PDBG("cannot set registers while thread is in syscall");
return;
}
switch((enum reg_index)regno)
{
case EAX: thread_state.eax = reg_content; PDBG("EAX = %8lx", reg_content); break;
case ECX: thread_state.ecx = reg_content; PDBG("ECX = %8lx", reg_content); break;
case EDX: thread_state.edx = reg_content; PDBG("EDX = %8lx", reg_content); break;
case EBX: thread_state.ebx = reg_content; PDBG("EBX = %8lx", reg_content); break;
case UESP: thread_state.sp = reg_content; PDBG("ESP = %8lx", reg_content); break;
case EBP: thread_state.ebp = reg_content; PDBG("EBP = %8lx", reg_content); break;
case ESI: thread_state.esi = reg_content; PDBG("ESI = %8lx", reg_content); break;
case EDI: thread_state.edi = reg_content; PDBG("EDI = %8lx", reg_content); break;
case EIP: thread_state.ip = reg_content; PDBG("EIP = %8lx", reg_content); break;
case EFL: thread_state.eflags = reg_content; PDBG("EFL = %8lx", reg_content); break;
case CS: PDBG("cannot set contents of register CS"); PDBG(" CS = %8lx", reg_content); break;
case SS: PDBG("cannot set contents of register SS"); PDBG(" SS = %8lx", reg_content); break;
case DS: PDBG("cannot set contents of register DS"); PDBG(" DS = %8lx", reg_content); break;
case ES: PDBG("cannot set contents of register ES"); PDBG(" ES = %8lx", reg_content); break;
case FS: thread_state.fs = reg_content; PDBG(" FS = %8lx", reg_content); break;
case GS: thread_state.gs = reg_content; PDBG(" GS = %8lx", reg_content); break;
}
set_current_thread_state(thread_state);
}

9
ports/src/lib/gdbserver_platform/gdbserver_platform_helper.cc
View File

@ -36,3 +36,12 @@ Thread_state get_current_thread_state()
return csc->state(csc->thread_cap(ptid.lwp));
}
void set_current_thread_state(Thread_state thread_state)
{
Cpu_session_component *csc = gdb_stub_thread()->cpu_session_component();
ptid_t ptid = ((struct inferior_list_entry*)current_inferior)->id;
csc->state(csc->thread_cap(ptid.lwp), thread_state);
}

2
ports/src/lib/gdbserver_platform/gdbserver_platform_helper.h
View File

@ -19,4 +19,6 @@
*/
Genode::Thread_state get_current_thread_state();
void set_current_thread_state(Genode::Thread_state thread_state);
#endif /* GDBSERVER_PLATFORM_HELPER_H */

7
ports/src/lib/gdbserver_platform/linux_x86_32_low.cc
View File

@ -54,3 +54,10 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
PDBG("not implemented yet for this platform");
}

7
ports/src/lib/gdbserver_platform/nova_x86_32_low.cc
View File

@ -47,3 +47,10 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
PDBG("not implemented yet for this platform");
}

7
ports/src/lib/gdbserver_platform/okl4_x86_low.cc
View File

@ -73,3 +73,10 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
PDBG("not implemented yet for this platform");
}

7
ports/src/lib/gdbserver_platform/pistachio_x86_low.cc
View File

@ -75,3 +75,10 @@ extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
return -1;
}
extern "C" void genode_store_register(int regno, unsigned long reg_content)
{
PDBG("not implemented yet for this platform");
}