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178 commits

Author SHA1 Message Date
Konstantin Belousov
c84005e9c8 Add unwind annotations for freebsd/x86 getcontext.S. 
Rearrange the code to put the slow branch out of main body,
and pinch the fixed amount of stack space to be able to annotate
the code.
 2010-05-02 17:06:24 +03:00
Konstantin Belousov
b73c618a31 Merge branch 'master' into freebsd 2010-05-02 16:29:02 +03:00
Arun Sharma
215afa30b7 Add unwind descriptors to getcontext.S 2010-04-28 16:32:30 -07:00
Lassi Tuura
a9dce3c06e During the stack unwinding process, the return address points to 
the instruction after the call for a normal frame. libunwind uses
IP-1 to lookup unwind information. However, this is not necessary for
interrupted frames such as signal frames (or interrupt frames) in
the kernel context.

This patch handles both cases correctly.

Based on work by Mark Wielaard <mwielaard@redhat.com>
 2010-04-24 19:16:09 -07:00
Konstantin Belousov
2709abc883 msync() also may be called on unaligned address. 2010-04-21 15:33:37 +03:00
Konstantin Belousov
4454413242 Account for possible unaligned access. 2010-04-21 15:18:02 +03:00
Konstantin Belousov
ee99dbec87 Use mincore instead of msync when available 2010-04-20 17:45:18 +03:00
Konstantin Belousov
75b76d1f45 Save FPU context for i386. 2010-04-17 00:18:33 +03:00
Arun Sharma
5a70fab451 Fix compiler warnings on x86 Linux 2010-04-14 18:54:20 -07:00
Konstantin Belousov
127acf8e97 Use correct offset name and value for ucontext offset in struct sigframe 2010-04-14 12:15:05 +03:00
Konstantin Belousov
0d311ea161 Add abort() after sigreturn calls 2010-04-14 12:10:34 +03:00
Konstantin Belousov
34b064bf22 Fix typo. 2010-04-14 12:10:14 +03:00
Konstantin Belousov
02d0cb6f71 Do not save FPU context on x86 for now; XMM save area must be 16-bytes aligned 2010-04-13 14:20:22 +03:00
Konstantin Belousov
ae7eebb839 Separate getcontext implementation for x86 2010-04-13 14:11:39 +03:00
Konstantin Belousov
66e49bdd41 Save %eax for i386 2010-04-13 13:55:23 +03:00
Konstantin Belousov
5a7407dd94 Merge branch 'master' into freebsd 2010-04-12 22:34:24 +03:00
Giuseppe Scrivano
eb8857a324 Silence a compiler warning 2010-04-12 10:45:31 -07:00
Konstantin Belousov
21f0e90ce8 Rework 69001646fa, store sigframe address into sigcontext_addr. 2010-04-11 22:01:08 +03:00
Konstantin Belousov
f10f851916 Add slightly more debug output 2010-04-11 14:59:36 +03:00
Konstantin Belousov
69001646fa Store the ucontext_t pointer to properly handle resume across signal frames. 2010-04-11 13:48:14 +03:00
Konstantin Belousov
dd1c7b6c1a Declare mxcsr as XMM 2010-04-10 18:48:35 +03:00
Konstantin Belousov
53f7e650e0 For FreeBSD/i386, add real offset values for FPU context fields. 2010-04-10 18:48:16 +03:00
Konstantin Belousov
6f7b335e89 Add my copyrights to several files that contain essential modifications 2010-04-10 01:42:26 +03:00
Konstantin Belousov
9fe75c7d93 Save FPU state when saving context. For XMM-capable CPUs only (for now). 2010-04-10 00:47:08 +03:00
Konstantin Belousov
117ccd246d Move all XMM offsets into one place. 2010-04-10 00:46:51 +03:00
Konstantin Belousov
f6546e27ed Implement the base code to fetch x86/xmm state on x86. Offsets to be filled. 2010-04-10 00:40:39 +03:00
Konstantin Belousov
2c50c95cde Correct arguments for Debug(). 
Shut up warning by using the cast.
 2010-04-10 00:38:54 +03:00
Arun Sharma
d1676f192e Fix warnings on 32 bit x86 2010-04-08 03:12:05 -07:00
Arun Sharma
caa6095aec Fix compile errors on Linux 2010-04-07 19:59:06 -07:00
Konstantin Belousov
979af4502f Move local_resume to os-specific file. 2010-04-05 23:00:27 +03:00
Konstantin Belousov
0dbeeeb08d Move uc_addr to os-specific file 2010-04-05 22:42:23 +03:00
Konstantin Belousov
79d012348d Move get_scratch_loc() to os-specific file. 2010-04-05 22:22:55 +03:00
Konstantin Belousov
aeee03dd74 Reduce diffs to master 2010-04-05 16:28:46 +03:00
Konstantin Belousov
fd88f41818 Merge remote branch 'origin/master' into freebsd 
Conflicts:
	src/x86/Gis_signal_frame.c
	src/x86/Gstep.c
	src/x86_64/Gis_signal_frame.c
	src/x86_64/Gstep.c
 2010-04-05 16:14:50 +03:00
Arun Sharma
8e53e62db9 Refactor os specific code for x86 (both 32 and 64 bit). 
Move Linux specific code into ${arch}/Gos-linux.c
 2010-04-04 16:46:13 -07:00
Konstantin Belousov
980ccffe9e Merge remote branch 'origin/master' into freebsd 
Conflicts:
	src/x86/Gis_signal_frame.c
 2010-04-04 12:44:10 +03:00
Arun Sharma
2b7ca45acc Fix handling of SA_SIGINFO frames on 32 bit x86 
Submitted by: Arne de Bruijn <mail@arnedebruijn.nl>
 2010-04-03 16:49:18 -07:00
Konstantin Belousov
8a75ba971a Signal trampoline on amd64 for ia32 is special. 2010-03-13 21:26:50 +02:00
Konstantin Belousov
e51429280b Handle error return from is_signal_frame 2010-03-13 20:31:12 +02:00
Konstantin Belousov
e9cd30040e Move x86 porting further. 2010-03-13 20:28:12 +02:00
Konstantin Belousov
71c4161247 Remove extra empty line 2010-03-13 18:33:22 +02:00
Konstantin Belousov
a6b23dcb0c Add partial implementation for is_signal_frame for i386. 2010-03-11 00:50:40 +02:00
Konstantin Belousov
54f8b2fdbe Fill real offsets for freebsd 2010-03-11 00:02:24 +02:00
Konstantin Belousov
47dcc89457 Remove unneeded braces 2010-03-10 23:51:59 +02:00
Konstantin Belousov
bb41eba56c FreeBSD/i386 port. get/setcontext need further work 2010-03-09 18:01:25 +02:00
Konstantin Belousov
53095e6b3e Code for resume 2010-03-07 23:43:07 +02:00
Konstantin Belousov
c64723835c Support walk over freebsd sigframes 2010-03-07 21:53:01 +02:00
Arun Sharma
3468a6b33d Change MS_SYNC to MS_ASYNC 
Hopefully this makes the address validation a bit cheaper.
 2010-02-23 10:35:47 -08:00
Paul Pluzhnikov
54752e0df0 Implement getcontext for x86 
Greetings,

Attached patch implements getcontext for x86.

Motivation is the same as:
http://lists.nongnu.org/archive/html/libunwind-devel/2008-06/msg00009.html

This also fixes check-name-space on x86.

Tested on Linux/86 with no new failures.

Thanks,
--
Paul Pluzhnikov
 2009-12-23 09:59:52 -08:00
Paul Pluzhnikov
0cf76ed0b5 Check for NULL when validating addresses 
This is rather on the obvious side.

While doing strace on an executable using libunwind, I noticed a
lot of:

  msync(0, 1, MS_SYNC) = -1 ENOMEM (Cannot allocate memory)

Since we know that the first page isn't mapped (or at least doesn't
contain the data we are looking for), we can eliminate all such
msync calls.

Tested on Linux/x86_64 with no regressions.
 2009-12-01 13:59:45 -08:00