diff options
| author | Andreas Schwab <schwab@suse.de> | 2008-04-20 02:25:13 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-04-20 13:03:36 +1000 |
| commit | e4cc58944c1e2ce41e3079d4eb60c95e7ce04b2b (patch) | |
| tree | 4051adb722a7066b4e4774d3b59af68ed5c52d1c | |
| parent | 585468e5d5962660867c269e26f0a4b89a599473 (diff) | |
[POWERPC] Add compat handler for PTRACE_GETSIGINFO
Current versions of gdb require a working implementation of
PTRACE_GETSIGINFO for proper watchpoint support. Since struct siginfo
contains pointers it must be converted when passed to a 32-bit debugger.
Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/kernel/ppc32.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/ptrace32.c | 27 |
2 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/ppc32.h b/arch/powerpc/kernel/ppc32.h index 90e56277179..fda05e2211d 100644 --- a/arch/powerpc/kernel/ppc32.h +++ b/arch/powerpc/kernel/ppc32.h @@ -135,4 +135,6 @@ struct ucontext32 { struct mcontext32 uc_mcontext; }; +extern int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s); + #endif /* _PPC64_PPC32_H */ diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c index 4c1de6af4c0..9d30e10970a 100644 --- a/arch/powerpc/kernel/ptrace32.c +++ b/arch/powerpc/kernel/ptrace32.c @@ -29,12 +29,15 @@ #include <linux/security.h> #include <linux/signal.h> #include <linux/compat.h> +#include <linux/elf.h> #include <asm/uaccess.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/system.h> +#include "ppc32.h" + /* * does not yet catch signals sent when the child dies. * in exit.c or in signal.c. @@ -64,6 +67,27 @@ static long compat_ptrace_old(struct task_struct *child, long request, return -EPERM; } +static int compat_ptrace_getsiginfo(struct task_struct *child, compat_siginfo_t __user *data) +{ + siginfo_t lastinfo; + int error = -ESRCH; + + read_lock(&tasklist_lock); + if (likely(child->sighand != NULL)) { + error = -EINVAL; + spin_lock_irq(&child->sighand->siglock); + if (likely(child->last_siginfo != NULL)) { + lastinfo = *child->last_siginfo; + error = 0; + } + spin_unlock_irq(&child->sighand->siglock); + } + read_unlock(&tasklist_lock); + if (!error) + return copy_siginfo_to_user32(data, &lastinfo); + return error; +} + long compat_arch_ptrace(struct task_struct *child, compat_long_t request, compat_ulong_t caddr, compat_ulong_t cdata) { @@ -282,6 +306,9 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 0, PT_REGS_COUNT * sizeof(compat_long_t), compat_ptr(data)); + case PTRACE_GETSIGINFO: + return compat_ptrace_getsiginfo(child, compat_ptr(data)); + case PTRACE_GETFPREGS: case PTRACE_SETFPREGS: case PTRACE_GETVRREGS: |