/* Low level interface to SPUs, for the remote server for GDB.
- Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
/* Some older glibc versions do not define this. */
#ifndef __WNOTHREAD
#define __WNOTHREAD 0x20000000 /* Don't wait on children of other
- threads in this group */
+ threads in this group */
#endif
#define PTRACE_TYPE_RET long
#define NR_spu_run 0x0116
/* Get current thread ID (Linux task ID). */
-#define current_tid ((struct inferior_list_entry *)current_inferior)->id
+#define current_ptid ((struct inferior_list_entry *)current_inferior)->id
/* These are used in remote-utils.c. */
int using_threads = 0;
+/* Defined in auto-generated file reg-spu.c. */
+void init_registers_spu (void);
+
/* Fetch PPU register REGNO. */
static CORE_ADDR
{
PTRACE_TYPE_RET res;
- int tid = current_tid;
+ int tid = ptid_get_lwp (current_ptid);
#ifndef __powerpc64__
/* If running as a 32-bit process on a 64-bit system, we attempt
errno = 0;
res = ptrace (PT_READ_U, tid,
- (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
+ (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
if (errno != 0)
{
char mess[128];
/ sizeof (PTRACE_TYPE_RET));
PTRACE_TYPE_RET *buffer;
- int tid = current_tid;
+ int tid = ptid_get_lwp (current_ptid);
buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
/ sizeof (PTRACE_TYPE_RET));
PTRACE_TYPE_RET *buffer;
- int tid = current_tid;
+ int tid = ptid_get_lwp (current_ptid);
buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
return ret;
memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
- myaddr, len);
+ myaddr, len);
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0)
/* If the PPU thread is currently stopped on a spu_run system call,
return to FD and ADDR the file handle and NPC parameter address
used with the system call. Return non-zero if successful. */
-static int
+static int
parse_spufs_run (int *fd, CORE_ADDR *addr)
{
char buf[4];
if (!annex)
return 0;
- sprintf (buf, "/proc/%ld/fd/%s", current_tid, annex);
+ sprintf (buf, "/proc/%ld/fd/%s", ptid_get_lwp (current_ptid), annex);
fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
if (fd <= 0)
return -1;
spu_create_inferior (char *program, char **allargs)
{
int pid;
+ ptid_t ptid;
pid = fork ();
if (pid < 0)
_exit (0177);
}
- add_thread (pid, NULL, pid);
+ add_process (pid, 0);
+
+ ptid = ptid_build (pid, pid, 0);
+ add_thread (ptid, NULL);
return pid;
}
int
spu_attach (unsigned long pid)
{
+ ptid_t ptid;
+
if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0)
{
fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid,
_exit (0177);
}
- add_thread (pid, NULL, pid);
+ add_process (pid, 1);
+ ptid = ptid_build (pid, pid, 0);
+ add_thread (ptid, NULL);
return 0;
}
/* Kill the inferior process. */
-static void
-spu_kill (void)
+static int
+spu_kill (int pid)
{
- ptrace (PTRACE_KILL, current_tid, 0, 0);
+ int status, ret;
+ struct process_info *process = find_process_pid (pid);
+ if (process == NULL)
+ return -1;
+
+ ptrace (PTRACE_KILL, pid, 0, 0);
+
+ do {
+ ret = waitpid (pid, &status, 0);
+ if (WIFEXITED (status) || WIFSIGNALED (status))
+ break;
+ } while (ret != -1 || errno != ECHILD);
+
+ clear_inferiors ();
+ remove_process (process);
+ return 0;
}
/* Detach from inferior process. */
static int
-spu_detach (void)
+spu_detach (int pid)
{
- ptrace (PTRACE_DETACH, current_tid, 0, 0);
+ struct process_info *process = find_process_pid (pid);
+ if (process == NULL)
+ return -1;
+
+ ptrace (PTRACE_DETACH, pid, 0, 0);
+
+ clear_inferiors ();
+ remove_process (process);
return 0;
}
static void
-spu_join (void)
+spu_mourn (struct process_info *process)
+{
+ remove_process (process);
+}
+
+static void
+spu_join (int pid)
{
int status, ret;
do {
- ret = waitpid (current_tid, &status, 0);
+ ret = waitpid (pid, &status, 0);
if (WIFEXITED (status) || WIFSIGNALED (status))
break;
} while (ret != -1 || errno != ECHILD);
/* Return nonzero if the given thread is still alive. */
static int
-spu_thread_alive (unsigned long tid)
+spu_thread_alive (ptid_t ptid)
{
- return tid == current_tid;
+ return ptid_equal (ptid, current_ptid);
}
/* Resume process. */
static void
-spu_resume (struct thread_resume *resume_info)
+spu_resume (struct thread_resume *resume_info, size_t n)
{
- while (resume_info->thread != -1
- && resume_info->thread != current_tid)
- resume_info++;
+ size_t i;
- if (resume_info->leave_stopped)
+ for (i = 0; i < n; i++)
+ if (ptid_equal (resume_info[i].thread, minus_one_ptid)
+ || ptid_equal (resume_info[i].thread, current_ptid))
+ break;
+
+ if (i == n)
return;
/* We don't support hardware single-stepping right now, assume
GDB knows to use software single-stepping. */
- if (resume_info->step)
+ if (resume_info[i].kind == resume_step)
fprintf (stderr, "Hardware single-step not supported.\n");
regcache_invalidate ();
errno = 0;
- ptrace (PTRACE_CONT, current_tid, 0, resume_info->sig);
+ ptrace (PTRACE_CONT, ptid_get_lwp (current_ptid), 0, resume_info[i].sig);
if (errno)
perror_with_name ("ptrace");
}
/* Wait for process, returns status. */
-static unsigned char
-spu_wait (char *status)
+static ptid_t
+spu_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options)
{
- int tid = current_tid;
+ int pid = ptid_get_pid (ptid);
int w;
int ret;
while (1)
{
- ret = waitpid (tid, &w, WNOHANG | __WALL | __WNOTHREAD);
+ ret = waitpid (pid, &w, WNOHANG | __WALL | __WNOTHREAD);
if (ret == -1)
{
while (!parse_spufs_run (&fd, &addr))
{
- ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0);
- waitpid (tid, NULL, __WALL | __WNOTHREAD);
+ ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0);
+ waitpid (pid, NULL, __WALL | __WNOTHREAD);
}
}
if (WIFEXITED (w))
{
fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
- *status = 'W';
+ ourstatus->kind = TARGET_WAITKIND_EXITED;
+ ourstatus->value.integer = WEXITSTATUS (w);
clear_inferiors ();
- return ((unsigned char) WEXITSTATUS (w));
+ return pid_to_ptid (ret);
}
else if (!WIFSTOPPED (w))
{
fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
- *status = 'X';
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = target_signal_from_host (WTERMSIG (w));
clear_inferiors ();
- return ((unsigned char) WTERMSIG (w));
+ return pid_to_ptid (ret);
}
/* After attach, we may have received a SIGSTOP. Do not return this
as signal to GDB, or else it will try to continue with SIGSTOP ... */
if (!server_waiting)
{
- *status = 'T';
- return 0;
+ ourstatus->kind = TARGET_WAITKIND_STOPPED;
+ ourstatus->value.sig = TARGET_SIGNAL_0;
+ return ptid_build (ret, ret, 0);
}
- *status = 'T';
- return ((unsigned char) WSTOPSIG (w));
+ ourstatus->kind = TARGET_WAITKIND_STOPPED;
+ ourstatus->value.sig = target_signal_from_host (WSTOPSIG (w));
+ return ptid_build (ret, ret, 0);
}
/* Fetch inferior registers. */
static void
-spu_fetch_registers (int regno)
+spu_fetch_registers (struct regcache *regcache, int regno)
{
int fd;
CORE_ADDR addr;
- /* ??? Some callers use 0 to mean all registers. */
- if (regno == 0)
- regno = -1;
-
/* We must be stopped on a spu_run system call. */
if (!parse_spufs_run (&fd, &addr))
return;
/* The ID register holds the spufs file handle. */
if (regno == -1 || regno == SPU_ID_REGNUM)
- supply_register (SPU_ID_REGNUM, (char *)&fd);
+ supply_register (regcache, SPU_ID_REGNUM, (char *)&fd);
/* The NPC register is found at ADDR. */
if (regno == -1 || regno == SPU_PC_REGNUM)
{
char buf[4];
if (fetch_ppc_memory (addr, buf, 4) == 0)
- supply_register (SPU_PC_REGNUM, buf);
+ supply_register (regcache, SPU_PC_REGNUM, buf);
}
/* The GPRs are found in the "regs" spufs file. */
sprintf (annex, "%d/regs", fd);
if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf)
for (i = 0; i < SPU_NUM_CORE_REGS; i++)
- supply_register (i, buf + i*16);
+ supply_register (regcache, i, buf + i*16);
}
}
/* Store inferior registers. */
static void
-spu_store_registers (int regno)
+spu_store_registers (struct regcache *regcache, int regno)
{
int fd;
CORE_ADDR addr;
if (regno == -1 || regno == SPU_PC_REGNUM)
{
char buf[4];
- collect_register (SPU_PC_REGNUM, buf);
+ collect_register (regcache, SPU_PC_REGNUM, buf);
store_ppc_memory (addr, buf, 4);
}
int i;
for (i = 0; i < SPU_NUM_CORE_REGS; i++)
- collect_register (i, buf + i*16);
+ collect_register (regcache, i, buf + i*16);
sprintf (annex, "%d/regs", fd);
spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf);
{
int fd, ret;
CORE_ADDR addr;
- char annex[32];
+ char annex[32], lslr_annex[32], buf[32];
+ CORE_ADDR lslr;
/* We must be stopped on a spu_run system call. */
if (!parse_spufs_run (&fd, &addr))
/* Use the "mem" spufs file to access SPU local store. */
sprintf (annex, "%d/mem", fd);
ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len);
+ if (ret > 0)
+ return ret == len ? 0 : EIO;
+
+ /* SPU local store access wraps the address around at the
+ local store limit. We emulate this here. To avoid needing
+ an extra access to retrieve the LSLR, we only do that after
+ trying the original address first, and getting end-of-file. */
+ sprintf (lslr_annex, "%d/lslr", fd);
+ memset (buf, 0, sizeof buf);
+ if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
+ 0, sizeof buf) <= 0)
+ return ret;
+
+ lslr = strtoul (buf, NULL, 16);
+ ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len);
+
return ret == len ? 0 : EIO;
}
{
int fd, ret;
CORE_ADDR addr;
- char annex[32];
+ char annex[32], lslr_annex[32], buf[32];
+ CORE_ADDR lslr;
/* We must be stopped on a spu_run system call. */
if (!parse_spufs_run (&fd, &addr))
/* Use the "mem" spufs file to access SPU local store. */
sprintf (annex, "%d/mem", fd);
ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len);
+ if (ret > 0)
+ return ret == len ? 0 : EIO;
+
+ /* SPU local store access wraps the address around at the
+ local store limit. We emulate this here. To avoid needing
+ an extra access to retrieve the LSLR, we only do that after
+ trying the original address first, and getting end-of-file. */
+ sprintf (lslr_annex, "%d/lslr", fd);
+ memset (buf, 0, sizeof buf);
+ if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
+ 0, sizeof buf) <= 0)
+ return ret;
+
+ lslr = strtoul (buf, NULL, 16);
+ ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len);
+
return ret == len ? 0 : EIO;
}
static void
spu_request_interrupt (void)
{
- syscall (SYS_tkill, current_tid, SIGINT);
-}
-
-static const char *
-spu_arch_string (void)
-{
- return "spu";
+ syscall (SYS_tkill, ptid_get_lwp (current_ptid), SIGINT);
}
static struct target_ops spu_target_ops = {
spu_attach,
spu_kill,
spu_detach,
+ spu_mourn,
spu_join,
spu_thread_alive,
spu_resume,
spu_wait,
spu_fetch_registers,
spu_store_registers,
+ NULL, /* prepare_to_access_memory */
+ NULL, /* done_accessing_memory */
spu_read_memory,
spu_write_memory,
spu_look_up_symbols,
NULL,
NULL,
NULL,
- spu_arch_string,
spu_proc_xfer_spu,
+ hostio_last_error_from_errno,
};
void
set_target_ops (&spu_target_ops);
set_breakpoint_data (breakpoint, sizeof breakpoint);
- init_registers ();
+ init_registers_spu ();
}
projects / deliverable / binutils-gdb.git / blobdiff