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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2010-02-22 23:51:32 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-23 22:45:26 +0100 |
| commit | c6a0dd7ec6fb2d4927979ed4dc562fc5c122d826 (patch) | |
| tree | 415f5e04788eb289820685b33dabcc7949d6196b | |
| parent | parisc: Disable CONFIG_HAVE_ARCH_TRACEHOOK (diff) | |
| download | linux-c6a0dd7ec6fb2d4927979ed4dc562fc5c122d826.tar.xz linux-c6a0dd7ec6fb2d4927979ed4dc562fc5c122d826.zip | |
ptrace: Fix ptrace_regset() comments and diagnose errors specifically
Return -EINVAL for the bad size and for unrecognized NT_* type in
ptrace_regset() instead of -EIO.
Also update the comments for this ptrace interface with more clarifications.
Requested-by: Roland McGrath <roland@redhat.com>
Requested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20100222225240.397523600@sbs-t61.sc.intel.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | include/linux/ptrace.h | 5 | ||||
| -rw-r--r-- | kernel/ptrace.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index dbfa821d5a6e..c5eab89da51e 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -30,6 +30,11 @@ /* * Generic ptrace interface that exports the architecture specific regsets * using the corresponding NT_* types (which are also used in the core dump). + * Please note that the NT_PRSTATUS note type in a core dump contains a full + * 'struct elf_prstatus'. But the user_regset for NT_PRSTATUS contains just the + * elf_gregset_t that is the pr_reg field of 'struct elf_prstatus'. For all the + * other user_regset flavors, the user_regset layout and the ELF core dump note + * payload are exactly the same layout. * * This interface usage is as follows: * struct iovec iov = { buf, len}; diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 13b4554d8fbb..42ad8ae729a0 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -537,7 +537,7 @@ static int ptrace_regset(struct task_struct *task, int req, unsigned int type, int regset_no; if (!regset || (kiov->iov_len % regset->size) != 0) - return -EIO; + return -EINVAL; regset_no = regset - view->regsets; kiov->iov_len = min(kiov->iov_len, |