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Author SHA1 Message Date
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
Konstantin Belousov b1c68e060c Arrange the FreeBSD ucontext offset definitions in ascending order. 2010-04-17 00:17:58 +03:00
Giuseppe Scrivano a67654e86f [PATCH] Reduce scope of the eh_frame_end local variable 2010-04-14 12:11:29 -07:00
Arun Sharma 1d9c5a356d Fix compiler warnings on x86_64 Linux 2010-04-14 12:01:37 -07:00
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 1e77c66a51 Fix FreeBSD/x86_64 sigcontext restore 2010-04-14 12:04:28 +03:00
Konstantin Belousov 61f4345a9e Fix an issue where len was too short for sysctl to recieve the process 
vm map.
 2010-04-13 15:33:11 +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
Arun Sharma c2d78041cc GCC compatibility on x86 for C++ exception handling 2010-04-12 12:08:43 -07:00
Giuseppe Scrivano eb8857a324 Silence a compiler warning 2010-04-12 10:45:31 -07:00
Konstantin Belousov 843190597c Remove unneeded include. 
Noted by:	Arun Sharma
 2010-04-11 22:07:31 +03:00
Konstantin Belousov 21f0e90ce8 Rework 69001646fa, store sigframe address into sigcontext_addr. 2010-04-11 22:01:08 +03:00
Konstantin Belousov 42bc15c72c Provide proper register offsets in the gregset for FreeBSD/i386 2010-04-11 19:18:07 +03:00
Konstantin Belousov f10f851916 Add slightly more debug output 2010-04-11 14:59:36 +03:00
Konstantin Belousov e33fa9f73c Ditch using the libutil, it is not async-signal safe. 2010-04-11 14:36:24 +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 f01a043712 Convince gcc that x86_64_sigreturn cannot return, as declared. 2010-04-11 13:47:28 +03:00
Konstantin Belousov a688d6c4c9 Remove unused variable. 2010-04-10 18:51:17 +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 ccc0ae665b More move of osdep code. 2010-04-05 16:25:36 +03:00
Konstantin Belousov a40641f326 Trim spaces 2010-04-05 16:25:20 +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 bd2798805a Reformat os-freebsd.c. 2010-04-03 23:29:28 +03:00
Konstantin Belousov 5715d912f4 Make setjmp/longjmp work at least on FreeBSD/amd64. 
FreeBSD-supplied setjmp() saves incremented stack pointer into jmpbuf.

I have no idea whether siglongjmp ever worked on amd64, since
UNW_NUM_EH_REGS == 2 and abort at siglongjmp.c:81 is firing.
 2010-04-03 19:02:43 +03:00
Konstantin Belousov 31ece3eaa1 Fix setcontext for amd64 freebsd 2010-04-03 18:28:31 +03:00
Konstantin Belousov 9bb9c972e6 Merge with origin/master 2010-03-31 16:01:38 +03:00
Arun Sharma 6203f1cd0f Cleanup a mapped elf image. 
Without this, we end up with mmap leaks. Thanks to Humberto Abdelnur
for suggesting this.
 2010-03-26 15:54:14 -07:00
Arun Sharma 7bd264e292 Fix up what looks like an unintentional semi colon. 
Thanks to Lassi Tuura for noticing it.
 2010-03-23 10:37:21 -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
Arun Sharma f8a15e9679 Fix a couple of test breakages on x86_64 
setcontext() now restores the signal mask. Also remove a check
in the test that doesn't seem to be valid.
 2010-03-10 22:52:12 -08:00
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 9f79621a29 Enough for now for ptrace backend 2010-03-08 20:55:50 +02:00
Konstantin Belousov 752ce15c4f Preliminary version of freebsd syscall unwinder 2010-03-08 19:45:54 +02:00
Konstantin Belousov c1b1c10cfc Fix memory leak on error 2010-03-08 18:48:27 +02:00
Konstantin Belousov 89e1df2d32 Fix _UI_siglongjmp_cont name 2010-03-08 15:55:29 +02:00
Konstantin Belousov 0f1c0f5f66 Fix resume. 2010-03-08 15:51:39 +02:00
Konstantin Belousov 43ed5b3e56 Add required assembler magic. 2010-03-08 00:57:50 +02:00
Konstantin Belousov 5f5b1a5daa tdep_get_elf_image should be public 2010-03-08 00:52:26 +02:00
Konstantin Belousov 093855f12a Remove unneeded includes of sys/types.h 2010-03-08 00:25:22 +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
Konstantin Belousov d0d5f9979b Correct rsp offset 2010-03-07 21:20:43 +02:00
Konstantin Belousov efd0655ff4 Silence warning about symbol redefinition. 2010-03-07 17:27:41 +02:00
Konstantin Belousov d7eea91448 Cast caddr_t argument for ptrace 2010-03-07 12:27:03 +02:00
Konstantin Belousov 200147d0f2 Handle fpu state 2010-03-06 23:22:46 +02:00
Konstantin Belousov 62218e10eb Provide proper offsets for gregs in freebsd ucontext. Note that fp regs are not handled. 2010-03-06 22:33:11 +02:00
Konstantin Belousov 63ae8ca894 Correct assignments, remove unneeded includes. 2010-03-06 22:32:11 +02:00
Konstantin Belousov 4de09a9c15 Implement freebsd-specific vm walker. 2010-03-06 18:53:27 +02:00
Konstantin Belousov 81f2de0083 Add implementation of unw_is_signal_frame for freebsd. 2010-03-06 18:08:44 +02:00
Konstantin Belousov 1ba7599250 Add FreeBSD stub. 2010-03-06 17:54:51 +02:00
Konstantin Belousov 2646e0fde8 Add freebsd stub 2010-03-06 17:51:00 +02:00
Konstantin Belousov 3eabce18b1 Include sys/types.h when needed. 2010-03-06 16:43:39 +02:00
Konstantin Belousov 29c110265f _NSIG. 2010-03-06 16:43:18 +02:00
Konstantin Belousov c7ffca11ae FreeBSD way to name registers. 2010-03-06 16:35:32 +02:00
Konstantin Belousov 78cb28b4a6 PT_CONTINUE. 2010-03-06 16:20:47 +02:00
Konstantin Belousov d4a4ddd23d Provide access to the general regs on FreeBSD. 2010-03-06 16:17:21 +02:00
Konstantin Belousov cf6ae3548f Code to read/write user memory on FreeBSD 2010-03-06 15:04:56 +02:00
Konstantin Belousov d11456ffbf Code to read/write fpregs on FreeBSD 2010-03-06 14:55:11 +02:00
Konstantin Belousov 905034ce72 Initial attempt at the build infrastructure for FreeBSD. 2010-03-06 00:41:37 +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
Stefan Demharter 752076789f Be gcc compatible for C++ exceptions on 32 bit platforms. 2010-02-21 22:45:08 -08:00
Arun Sharma 5a1d3c6fd7 Remove bogus check on scan_string which is guaranteed to fail every time. 2010-02-21 22:35:26 -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
Paul Pluzhnikov 9626d66019 Fix a race condition in dwarf unwinding. 
Original code was accessing rs_cache memory without holding a lock
in some cases. If there was sufficient cache pressure, entry being
accessed may be overwritten by another thread, resulting in a data
race.

We now make a thread local copy of the data, before releasing the
lock. If we end up supporting UNW_CACHE_PER_THREAD properly
in the future, this memcpy should be unnecessary.
 2009-11-24 15:18:48 -08:00
Paul Pluzhnikov 2648a77f04 Simplify control flow 
Greetings,

Attached patch gets rid of additional unnecessary branch (rs_get_cache
can not return NULL unless caching_policy is UNW_CACHE_NONE), gets rid of
goto's, and makes apply_reg_state (major CPU consumer) execute with cache
lock not held (before the patch, apply_reg_state was called with lock held
for newly-inserted entries, but not for found-in-cache entries).

Tested on Linux/x86_64 with no regressions.

Thanks,
--
Paul Pluzhnikov
 2009-11-20 12:04:13 -08:00
Paul Pluzhnikov f958b9dc4f Get rid of some bogus checks. 
Greetings,

Attached patch is rather on the obvious side:
- rs1 can't be NULL since it's assigned on previous line
- rs_new never returns NULL, and if it ever did, we'd crash on memcpy that
  preceeds the NULL check.

Tested on Linux/x86_64 with no regressions.

Thanks,
--
Paul Pluzhnikov
 2009-11-20 11:40:05 -08:00
Arun Sharma d7089547e2 Fix a warning message on i386 
Without this, we may be accessing data beyond the array bounds.
 2009-10-23 22:38:11 -07:00
Arun Sharma 491d576529 Fix compiler warnings on x86_64 2009-10-16 14:01:50 -07:00
Paul Pluzhnikov b56375e76a Reduce stack use and apply CONFIG_DEBUG_FRAME to more code. 
Currently, libunwind allocates several PATH_MAX entries on stack, while
trying to find a binary via /proc/.../maps.

However stack space may be at premium (especially when sigaltstack is used),
and PATH_MAX on Linux is 4096, while SIGSTKSZ is only 8192 on x86.

Attached patch eliminates multiple PATH_MAX stack allocations, and simplifies
code in maps_next, at the cost of being unable to do anything if we can't
mmap one page. It appears to me that under such low-memory conditions,
libunwind will fail shortly elsewhere anyway.

This patch also disables more of debug_frame-handling code when
CONFIG_DEBUG_FRAME is undefined.

Tested on Linux/x86_64 with and without CONFIG_DEBUG_FRAME, no regressions.
 2009-10-07 12:51:03 -07:00
Paul Pluzhnikov fc2934aade Make the remaining sigprocmask calls conditional on --enable-block-signals 2009-09-29 23:14:50 -07:00
Paul Pluzhnikov 839db77b7b Wait if there is contention on the cache 
The behavior on wait vs abort unwind depends on the locking primitive
chosen by the user. This makes the API consistent and independent of
the locking primitive.
 2009-09-25 09:38:55 -07:00