diff options
| author | James Hogan <james.hogan@imgtec.com> | 2014-09-01 22:48:40 +0100 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@codesourcery.com> | 2014-09-03 22:09:10 +0100 |
| commit | ac740bc7a9103a561329ebf7aa05ff31bcab2267 (patch) | |
| tree | 6b3243a23c0c7bddbfcfdbe9eeaa11ee97798f67 /gdb | |
| parent | 7d793aa9f0986828d5dde8f3811a7adafc38b6b4 (diff) | |
| download | gdb-ac740bc7a9103a561329ebf7aa05ff31bcab2267.zip gdb-ac740bc7a9103a561329ebf7aa05ff31bcab2267.tar.gz gdb-ac740bc7a9103a561329ebf7aa05ff31bcab2267.tar.bz2 | |
Reset errno before PTRACE_PEEKUSER for MIPS DSP_CONTROL
PTRACE_PEEKUSER can return -1, which is usually used to determine whether
a system call has reported an error, so errno must be used alone to
determine whether an error occurred. However errno isn't modified by a
successful system call so it must be reset to a known value (0) before the
syscall call.
Add the missing errno reset when reading the DSP_CONTROL register in the
native MIPS Linux backend and the MIPS gdbserver backend.
gdb/:
* mips-linux-nat.c (mips_linux_read_description): Reset errno to 0
prior to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.
gdb/gdbserver/:
* linux-mips-low.c (mips_read_description): Reset errno to 0 prior
to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/gdbserver/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/gdbserver/linux-mips-low.c | 1 | ||||
| -rw-r--r-- | gdb/mips-linux-nat.c | 1 |
4 files changed, 12 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index d416623..ad1a87b 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2014-09-03 James Hogan <james.hogan@imgtec.com> + + * mips-linux-nat.c (mips_linux_read_description): Reset errno to 0 + prior to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call. + 2014-09-03 Sergio Durigan Junior <sergiodj@redhat.com> PR python/16699 diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index a47ef49..3fb143c 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -1,3 +1,8 @@ +2014-09-03 James Hogan <james.hogan@imgtec.com> + + * linux-mips-low.c (mips_read_description): Reset errno to 0 prior + to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call. + 2014-09-03 Gary Benson <gbenson@redhat.com> * linux-x86-low.c (x86_linux_prepare_to_resume): Use diff --git a/gdb/gdbserver/linux-mips-low.c b/gdb/gdbserver/linux-mips-low.c index 1b2160b..377284b 100644 --- a/gdb/gdbserver/linux-mips-low.c +++ b/gdb/gdbserver/linux-mips-low.c @@ -128,6 +128,7 @@ mips_read_description (void) { int pid = lwpid_of (current_inferior); + errno = 0; ptrace (PTRACE_PEEKUSER, pid, DSP_CONTROL, 0); switch (errno) { diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c index 88faa1e..ffc8411 100644 --- a/gdb/mips-linux-nat.c +++ b/gdb/mips-linux-nat.c @@ -439,6 +439,7 @@ mips_linux_read_description (struct target_ops *ops) if (tid == 0) tid = ptid_get_pid (inferior_ptid); + errno = 0; ptrace (PTRACE_PEEKUSER, tid, DSP_CONTROL, 0); switch (errno) { |