diff options
Diffstat (limited to 'gdb/linux-nat.c')
| -rw-r--r-- | gdb/linux-nat.c | 99 |
1 files changed, 68 insertions, 31 deletions
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c index ebf4055..1dac44d 100644 --- a/gdb/linux-nat.c +++ b/gdb/linux-nat.c @@ -3862,10 +3862,11 @@ siginfo_fixup (siginfo_t *siginfo, gdb_byte *inf_siginfo, int direction) } } -static LONGEST +static enum target_xfer_status linux_xfer_siginfo (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, - const gdb_byte *writebuf, ULONGEST offset, ULONGEST len) + const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, + ULONGEST *xfered_len) { int pid; siginfo_t siginfo; @@ -3912,27 +3913,28 @@ linux_xfer_siginfo (struct target_ops *ops, enum target_object object, return TARGET_XFER_E_IO; } - return len; + *xfered_len = len; + return TARGET_XFER_OK; } -static LONGEST +static enum target_xfer_status linux_nat_xfer_partial (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, - ULONGEST offset, ULONGEST len) + ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) { struct cleanup *old_chain; - LONGEST xfer; + enum target_xfer_status xfer; if (object == TARGET_OBJECT_SIGNAL_INFO) return linux_xfer_siginfo (ops, object, annex, readbuf, writebuf, - offset, len); + offset, len, xfered_len); /* The target is connected but no live inferior is selected. Pass this request down to a lower stratum (e.g., the executable file). */ if (object == TARGET_OBJECT_MEMORY && ptid_equal (inferior_ptid, null_ptid)) - return 0; + return TARGET_XFER_EOF; old_chain = save_inferior_ptid (); @@ -3940,7 +3942,7 @@ linux_nat_xfer_partial (struct target_ops *ops, enum target_object object, inferior_ptid = pid_to_ptid (ptid_get_lwp (inferior_ptid)); xfer = linux_ops->to_xfer_partial (ops, object, annex, readbuf, writebuf, - offset, len); + offset, len, xfered_len); do_cleanups (old_chain); return xfer; @@ -4110,11 +4112,11 @@ linux_nat_make_corefile_notes (bfd *obfd, int *note_size) can be much more efficient than banging away at PTRACE_PEEKTEXT, but it doesn't support writes. */ -static LONGEST +static enum target_xfer_status linux_proc_xfer_partial (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, - ULONGEST offset, LONGEST len) + ULONGEST offset, LONGEST len, ULONGEST *xfered_len) { LONGEST ret; int fd; @@ -4125,7 +4127,7 @@ linux_proc_xfer_partial (struct target_ops *ops, enum target_object object, /* Don't bother for one word. */ if (len < 3 * sizeof (long)) - return 0; + return TARGET_XFER_EOF; /* We could keep this file open and cache it - possibly one per thread. That requires some juggling, but is even faster. */ @@ -4133,7 +4135,7 @@ linux_proc_xfer_partial (struct target_ops *ops, enum target_object object, ptid_get_pid (inferior_ptid)); fd = gdb_open_cloexec (filename, O_RDONLY | O_LARGEFILE, 0); if (fd == -1) - return 0; + return TARGET_XFER_EOF; /* If pread64 is available, use it. It's faster if the kernel supports it (only one syscall), and it's 64-bit safe even on @@ -4149,7 +4151,14 @@ linux_proc_xfer_partial (struct target_ops *ops, enum target_object object, ret = len; close (fd); - return ret; + + if (ret == 0) + return TARGET_XFER_EOF; + else + { + *xfered_len = ret; + return TARGET_XFER_OK; + } } @@ -4205,11 +4214,12 @@ spu_enumerate_spu_ids (int pid, gdb_byte *buf, ULONGEST offset, ULONGEST len) /* Implement the to_xfer_partial interface for the TARGET_OBJECT_SPU object type, using the /proc file system. */ -static LONGEST + +static enum target_xfer_status linux_proc_xfer_spu (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, - ULONGEST offset, ULONGEST len) + ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) { char buf[128]; int fd = 0; @@ -4221,7 +4231,19 @@ linux_proc_xfer_spu (struct target_ops *ops, enum target_object object, if (!readbuf) return TARGET_XFER_E_IO; else - return spu_enumerate_spu_ids (pid, readbuf, offset, len); + { + LONGEST l = spu_enumerate_spu_ids (pid, readbuf, offset, len); + + if (l < 0) + return TARGET_XFER_E_IO; + else if (l == 0) + return TARGET_XFER_EOF; + else + { + *xfered_len = (ULONGEST) l; + return TARGET_XFER_OK; + } + } } xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex); @@ -4233,7 +4255,7 @@ linux_proc_xfer_spu (struct target_ops *ops, enum target_object object, && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) { close (fd); - return 0; + return TARGET_XFER_EOF; } if (writebuf) @@ -4242,7 +4264,16 @@ linux_proc_xfer_spu (struct target_ops *ops, enum target_object object, ret = read (fd, readbuf, (size_t) len); close (fd); - return ret; + + if (ret < 0) + return TARGET_XFER_E_IO; + else if (ret == 0) + return TARGET_XFER_EOF; + else + { + *xfered_len = (ULONGEST) ret; + return TARGET_XFER_OK; + } } @@ -4329,34 +4360,40 @@ linux_proc_pending_signals (int pid, sigset_t *pending, do_cleanups (cleanup); } -static LONGEST +static enum target_xfer_status linux_nat_xfer_osdata (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, - const gdb_byte *writebuf, ULONGEST offset, ULONGEST len) + const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, + ULONGEST *xfered_len) { gdb_assert (object == TARGET_OBJECT_OSDATA); - return linux_common_xfer_osdata (annex, readbuf, offset, len); + *xfered_len = linux_common_xfer_osdata (annex, readbuf, offset, len); + if (*xfered_len == 0) + return TARGET_XFER_EOF; + else + return TARGET_XFER_OK; } -static LONGEST +static enum target_xfer_status linux_xfer_partial (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, - const gdb_byte *writebuf, ULONGEST offset, ULONGEST len) + const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, + ULONGEST *xfered_len) { - LONGEST xfer; + enum target_xfer_status xfer; if (object == TARGET_OBJECT_AUXV) return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, - offset, len); + offset, len, xfered_len); if (object == TARGET_OBJECT_OSDATA) return linux_nat_xfer_osdata (ops, object, annex, readbuf, writebuf, - offset, len); + offset, len, xfered_len); if (object == TARGET_OBJECT_SPU) return linux_proc_xfer_spu (ops, object, annex, readbuf, writebuf, - offset, len); + offset, len, xfered_len); /* GDB calculates all the addresses in possibly larget width of the address. Address width needs to be masked before its final use - either by @@ -4373,12 +4410,12 @@ linux_xfer_partial (struct target_ops *ops, enum target_object object, } xfer = linux_proc_xfer_partial (ops, object, annex, readbuf, writebuf, - offset, len); - if (xfer != 0) + offset, len, xfered_len); + if (xfer != TARGET_XFER_EOF) return xfer; return super_xfer_partial (ops, object, annex, readbuf, writebuf, - offset, len); + offset, len, xfered_len); } static void |