From: Tejun Heo <tj@kernel.org>
To: oleg@redhat.com
Cc: vda.linux@googlemail.com, jan.kratochvil@redhat.com,
linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, indan@nul.nu, bdonlan@gmail.com,
pedro@codesourcery.com, Tejun Heo <tj@kernel.org>,
Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Ralf Baechle <ralf@linux-mips.org>,
Kyle McMartin <kyle@mcmartin.ca>, Helge Deller <deller@gmx.de>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
x86@kernel.org
Subject: [PATCH 15/19] ptrace: add siginfo.si_pt_flags
Date: Tue, 24 May 2011 20:37:35 +0200 [thread overview]
Message-ID: <1306262259-7285-16-git-send-email-tj@kernel.org> (raw)
In-Reply-To: <1306262259-7285-1-git-send-email-tj@kernel.org>
This essentially is a simple addition of a flag field but seems
complicated thanks to siginfo_t convolution. _sigtrap struct, which
contains all the fields used by ptrace_notify[_locked]() and the new
_pt_flags, is added to siginfo._sifields union along with the field
abbreviation macro si_pt_flags; then, __SI_TRAP is defined to
implement copying of the new field to userland.
Two architectures - ia64 and mips - define their own versions of
siginfo_t and ia64 implements its own copy_siginfo_to_user(). Also,
x86, mips, parisc, powerpc, s390, sparc and tile have compat_siginfo_t
and copy_siginfo_to_user32() for 32bit compatibility. All are updated
such that [compat_]siginfo_t have _sigtrap and all the fields are
copied out.
x86 is tested. Affected code in mips, powerpc, s390 and sparc are
compile tested. mips and tile are untested.
This patch doesn't actually make use of the new field.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: x86@kernel.org
---
arch/ia64/include/asm/siginfo.h | 7 +++++++
arch/ia64/kernel/signal.c | 5 +++++
arch/mips/include/asm/compat-signal.h | 7 +++++++
arch/mips/include/asm/siginfo.h | 7 +++++++
arch/mips/kernel/signal32.c | 5 +++++
arch/parisc/kernel/signal32.c | 5 +++++
arch/parisc/kernel/signal32.h | 7 +++++++
arch/powerpc/kernel/ppc32.h | 7 +++++++
arch/powerpc/kernel/signal_32.c | 5 +++++
arch/s390/kernel/compat_linux.h | 7 +++++++
arch/s390/kernel/compat_signal.c | 5 +++++
arch/sparc/kernel/signal32.c | 12 ++++++++++++
arch/tile/kernel/compat_signal.c | 11 +++++++++++
arch/x86/ia32/ia32_signal.c | 4 ++++
arch/x86/include/asm/ia32.h | 7 +++++++
include/asm-generic/siginfo.h | 10 ++++++++++
kernel/signal.c | 7 ++++++-
17 files changed, 117 insertions(+), 1 deletions(-)
diff --git a/arch/ia64/include/asm/siginfo.h b/arch/ia64/include/asm/siginfo.h
index c8fcaa2..2cff1ce 100644
--- a/arch/ia64/include/asm/siginfo.h
+++ b/arch/ia64/include/asm/siginfo.h
@@ -70,6 +70,13 @@ typedef struct siginfo {
long _band; /* POLL_IN, POLL_OUT, POLL_MSG (XPG requires a "long") */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ pid_t _pid; /* sender's pid */
+ uid_t _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} siginfo_t;
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 7bdafc8..ee18366 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -142,6 +142,11 @@ copy_siginfo_to_user (siginfo_t __user *to, siginfo_t *from)
err |= __put_user(from->si_addr, &to->si_addr);
err |= __put_user(from->si_imm, &to->si_imm);
break;
+ case __SI_TRAP >> 16:
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_TIMER >> 16:
err |= __put_user(from->si_tid, &to->si_tid);
err |= __put_user(from->si_overrun, &to->si_overrun);
diff --git a/arch/mips/include/asm/compat-signal.h b/arch/mips/include/asm/compat-signal.h
index 368a99e..47b2e4f 100644
--- a/arch/mips/include/asm/compat-signal.h
+++ b/arch/mips/include/asm/compat-signal.h
@@ -54,6 +54,13 @@ typedef struct compat_siginfo {
int _fd;
} _sigpoll;
+ /* SIGTRAP */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ compat_uid_t _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
+
/* POSIX.1b timers */
struct {
timer_t _tid; /* timer id */
diff --git a/arch/mips/include/asm/siginfo.h b/arch/mips/include/asm/siginfo.h
index 20ebeb8..6e8f0d6 100644
--- a/arch/mips/include/asm/siginfo.h
+++ b/arch/mips/include/asm/siginfo.h
@@ -96,6 +96,13 @@ typedef struct siginfo {
__ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ pid_t _pid; /* sender's pid */
+ __ARCH_SI_UID_T _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} siginfo_t;
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index aae9866..7e392e1 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -452,6 +452,11 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
err |= __put_user(from->si_band, &to->si_band);
err |= __put_user(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP >> 16:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
case __SI_MESGQ >> 16:
err |= __put_user(from->si_pid, &to->si_pid);
diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c
index e141324..ead8ca4 100644
--- a/arch/parisc/kernel/signal32.c
+++ b/arch/parisc/kernel/signal32.c
@@ -482,6 +482,11 @@ copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
err |= __put_user(from->si_band, &to->si_band);
err |= __put_user(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP >> 16:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_TIMER >> 16:
err |= __put_user(from->si_tid, &to->si_tid);
err |= __put_user(from->si_overrun, &to->si_overrun);
diff --git a/arch/parisc/kernel/signal32.h b/arch/parisc/kernel/signal32.h
index c780084..8016f51 100644
--- a/arch/parisc/kernel/signal32.h
+++ b/arch/parisc/kernel/signal32.h
@@ -104,6 +104,13 @@ typedef struct compat_siginfo {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ unsigned int _pid; /* sender's pid */
+ unsigned int _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} compat_siginfo_t;
diff --git a/arch/powerpc/kernel/ppc32.h b/arch/powerpc/kernel/ppc32.h
index dc16aef..4293542 100644
--- a/arch/powerpc/kernel/ppc32.h
+++ b/arch/powerpc/kernel/ppc32.h
@@ -64,6 +64,13 @@ typedef struct compat_siginfo {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ compat_uid_t _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} compat_siginfo_t;
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index b96a3a0..d072458 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -716,6 +716,11 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
err |= __put_user(s->si_band, &d->si_band);
err |= __put_user(s->si_fd, &d->si_fd);
break;
+ case __SI_TRAP:
+ err |= __put_user(s->si_pid, &d->si_pid);
+ err |= __put_user(s->si_uid, &d->si_uid);
+ err |= __put_user(s->si_pt_flags, &d->si_pt_flags);
+ break;
case __SI_TIMER >> 16:
err |= __put_user(s->si_tid, &d->si_tid);
err |= __put_user(s->si_overrun, &d->si_overrun);
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index 9635d75..f8c973f 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -72,6 +72,13 @@ typedef struct compat_siginfo {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ pid_t _pid; /* sender's pid */
+ uid_t _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} compat_siginfo_t;
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index eee9998..b3c9f6b 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -96,6 +96,11 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
err |= __put_user(from->si_band, &to->si_band);
err |= __put_user(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP >> 16:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_TIMER >> 16:
err |= __put_user(from->si_tid, &to->si_tid);
err |= __put_user(from->si_overrun, &to->si_overrun);
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index 75fad42..c545212 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -102,6 +102,13 @@ typedef struct compat_siginfo{
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ unsigned int _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
}compat_siginfo_t;
@@ -165,6 +172,11 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
err |= __put_user(from->si_band, &to->si_band);
err |= __put_user(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP >> 16:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
case __SI_MESGQ >> 16:
err |= __put_user(from->si_pid, &to->si_pid);
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
index dbb0dfc..0a5d694 100644
--- a/arch/tile/kernel/compat_signal.c
+++ b/arch/tile/kernel/compat_signal.c
@@ -109,6 +109,13 @@ struct compat_siginfo {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ unsigned int _pid; /* sender's pid */
+ unsigned int _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
};
@@ -219,6 +226,10 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from)
case __SI_POLL >> 16:
err |= __put_user(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP >> 16:
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_TIMER >> 16:
err |= __put_user(from->si_overrun, &to->si_overrun);
err |= __put_user(ptr_to_compat(from->si_ptr),
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 588a7aa..1df88cc 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -85,6 +85,10 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
case __SI_POLL >> 16:
put_user_ex(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP:
+ put_user_ex(from->si_uid, &to->si_uid);
+ put_user_ex(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_TIMER >> 16:
put_user_ex(from->si_overrun, &to->si_overrun);
put_user_ex(ptr_to_compat(from->si_ptr),
diff --git a/arch/x86/include/asm/ia32.h b/arch/x86/include/asm/ia32.h
index 1f7e625..7eab27a 100644
--- a/arch/x86/include/asm/ia32.h
+++ b/arch/x86/include/asm/ia32.h
@@ -126,6 +126,13 @@ typedef struct compat_siginfo {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ unsigned int _pid; /* sender's pid */
+ unsigned int _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} compat_siginfo_t;
diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h
index 0dd4e87..9ecabdf 100644
--- a/include/asm-generic/siginfo.h
+++ b/include/asm-generic/siginfo.h
@@ -90,6 +90,13 @@ typedef struct siginfo {
__ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
+
+ /* SIGTRAP */
+ struct {
+ __kernel_pid_t _pid; /* sender's pid */
+ __ARCH_SI_UID_T _uid; /* sender's uid */
+ unsigned int _pt_flags;
+ } _sigtrap;
} _sifields;
} siginfo_t;
@@ -116,6 +123,7 @@ typedef struct siginfo {
#define si_addr_lsb _sifields._sigfault._addr_lsb
#define si_band _sifields._sigpoll._band
#define si_fd _sifields._sigpoll._fd
+#define si_pt_flags _sifields._sigtrap._pt_flags
#ifdef __KERNEL__
#define __SI_MASK 0xffff0000u
@@ -126,6 +134,7 @@ typedef struct siginfo {
#define __SI_CHLD (4 << 16)
#define __SI_RT (5 << 16)
#define __SI_MESGQ (6 << 16)
+#define __SI_TRAP (7 << 16)
#define __SI_CODE(T,N) ((T) | ((N) & 0xffff))
#else
#define __SI_KILL 0
@@ -135,6 +144,7 @@ typedef struct siginfo {
#define __SI_CHLD 0
#define __SI_RT 0
#define __SI_MESGQ 0
+#define __SI_TRAP 0
#define __SI_CODE(T,N) (N)
#endif
diff --git a/kernel/signal.c b/kernel/signal.c
index 16cd311..4662723 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1881,7 +1881,7 @@ static void ptrace_do_notify(int exit_code, int why)
memset(&info, 0, sizeof info);
info.si_signo = SIGTRAP;
- info.si_code = exit_code;
+ info.si_code = __SI_TRAP | exit_code;
info.si_pid = task_pid_vnr(current);
info.si_uid = current_uid();
@@ -2535,6 +2535,11 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t *from)
err |= __put_user(from->si_band, &to->si_band);
err |= __put_user(from->si_fd, &to->si_fd);
break;
+ case __SI_TRAP:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pt_flags, &to->si_pt_flags);
+ break;
case __SI_FAULT:
err |= __put_user(from->si_addr, &to->si_addr);
#ifdef __ARCH_SI_TRAPNO
--
1.7.1
next prev parent reply other threads:[~2011-05-24 18:39 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 18:37 [PATCHSET ptrace] ptrace: implement PTRACE_SEIZE/INTERRUPT and group stop notification, take#3 Tejun Heo
2011-05-24 18:37 ` [PATCH 01/19] job control: rename signal->group_stop and flags to jobctl and rearrange flags Tejun Heo
2011-05-24 18:37 ` [PATCH 02/19] ptrace: ptrace_check_attach(): rename @kill to @ignore_state and add comments Tejun Heo
2011-05-24 18:37 ` [PATCH 03/19] ptrace: relocate set_current_state(TASK_TRACED) in ptrace_stop() Tejun Heo
2011-05-24 18:37 ` [PATCH 04/19] job control: introduce JOBCTL_PENDING_MASK and task_clear_jobctl_pending() Tejun Heo
2011-05-24 18:37 ` [PATCH 05/19] job control: make task_clear_jobctl_pending() clear TRAPPING automatically Tejun Heo
2011-05-24 18:37 ` [PATCH 06/19] job control: introduce task_set_jobctl_pending() Tejun Heo
2011-05-24 18:37 ` [PATCH 07/19] ptrace: use bit_waitqueue for TRAPPING instead of wait_chldexit Tejun Heo
2011-05-24 19:03 ` Linus Torvalds
2011-05-25 8:44 ` Tejun Heo
2011-05-25 14:34 ` Linus Torvalds
2011-05-25 14:42 ` Tejun Heo
2011-05-25 21:08 ` Valdis.Kletnieks
2011-05-24 18:37 ` [PATCH 08/19] ptrace: move JOBCTL_TRAPPING wait to wait(2) and ptrace_check_attach() Tejun Heo
2011-05-24 18:37 ` [PATCH 09/19] ptrace: make TRAPPING wait interruptible Tejun Heo
2011-05-24 18:37 ` [PATCH 10/19] signal: remove three noop tracehooks Tejun Heo
2011-05-24 18:37 ` [PATCH 11/19] job control: introduce JOBCTL_TRAP_STOP and use it for group stop trap Tejun Heo
2011-05-24 18:37 ` [PATCH 12/19] ptrace: implement PTRACE_SEIZE Tejun Heo
2011-05-24 18:37 ` [PATCH 13/19] ptrace: implement PTRACE_INTERRUPT Tejun Heo
2011-05-24 18:37 ` [PATCH 14/19] ptrace: restructure ptrace_getsiginfo() Tejun Heo
2011-05-24 18:37 ` Tejun Heo [this message]
2011-05-24 18:37 ` [PATCH 16/19] ptrace: make group stop state visible via PTRACE_GETSIGINFO Tejun Heo
2011-05-24 18:37 ` [PATCH 17/19] ptrace: don't let PTRACE_SETSIGINFO override __SI_TRAP siginfo Tejun Heo
2011-05-24 18:37 ` [PATCH 18/19] ptrace: add JOBCTL_BLOCK_NOTIFY Tejun Heo
2011-05-24 18:37 ` [PATCH 19/19] ptrace: implement group stop notification for ptracer Tejun Heo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1306262259-7285-16-git-send-email-tj@kernel.org \
--to=tj@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=bdonlan@gmail.com \
--cc=benh@kernel.crashing.org \
--cc=davem@davemloft.net \
--cc=deller@gmx.de \
--cc=fenghua.yu@intel.com \
--cc=heiko.carstens@de.ibm.com \
--cc=indan@nul.nu \
--cc=jan.kratochvil@redhat.com \
--cc=jejb@parisc-linux.org \
--cc=kyle@mcmartin.ca \
--cc=linux-kernel@vger.kernel.org \
--cc=oleg@redhat.com \
--cc=paulus@samba.org \
--cc=pedro@codesourcery.com \
--cc=ralf@linux-mips.org \
--cc=schwidefsky@de.ibm.com \
--cc=tony.luck@intel.com \
--cc=torvalds@linux-foundation.org \
--cc=vda.linux@googlemail.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox