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* Simplify syscall generation and ABI source file handling for the build.bdrewery2015-10-131-150/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is to make the Makefile more easily extendable for new ABIs. This also makes several other subtle changes: - The build now is given a list of ABIs to use based on the MACHINE_ARCH or MACHINE_CPUARCH. These ABIs have a related path in sys/ that is used to generate their syscalls. For each ABI to build check for a ABI.c, MACHINE_ARCH-ABI.c, or a MACHINE_CPUARCH-ABI.c. This matches the old behavior needed for archs such as powerpc* and mips*. - The ABI source file selection allows for simpler assignment of common ABIs such as "fbsd32" from sys/compat/freebsd32, or cloudabi64. - Expand 'fbsd' to 'freebsd' everywhere for consistency. - Split out the powerpc-fbsd.c file into a powerpc64-freebsd32.c to be more like the amd64-freebsd32.c file and to more easily allow the auto-generation of ABI handling to work. - Rename 'syscalls.h' to 'fbsd_syscalls.h' to lessen the ambiguity and avoid confusion with syscall.h (such as in r288997). - For non-native syscall header files, they are now renamed to be ABI_syscalls.h, where ABI is what ABI the Makefile is building. - Remove all of the makesyscalls config files. The "native" one being name i386.conf was a long outstanding bug. They were all the same except for the data they generated, so now it is just auto-generated as a build artifact. - The syscalls array is now fixed to be static in the syscalls header to remove the compiler warning about non-extern. This was worked around in the aarch64-fbsd.c file but not the others. - All syscall table names are now just 'syscallnames' since they don't need to be different as they are all static in their own ABI files. The alternative is to name them ABI_syscallnames which does not seem necessary. Reviewed by: ed, jhb MFC after: 3 weeks Differential Revision: https://reviews.freebsd.org/D3851
* Several changes to truss.jhb2015-09-301-247/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Refactor the interface between the ABI-independent code and the ABI-specific backends. The backends now provide smaller hooks to fetch system call arguments and return values. The rest of the system call entry and exit handling that was previously duplicated among all the backends has been moved to one place. - Merge the loop when waiting for an event with the loop for handling stops. This also means not emulating a procfs-like interface on top of ptrace(). Instead, use a single event loop that fetches process events via waitid(). Among other things this allows us to report the full 32-bit exit value. - Use PT_FOLLOW_FORK to follow new child processes instead of forking a new truss process for each new child. This allows one truss process to monitor a tree of processes and truss -c should now display one total for the entire tree instead of separate summaries per process. - Use the recently added fields to ptrace_lwpinfo to determine the current system call number and argument count. The latter is especially useful and fixes a regression since the conversion from procfs. truss now generally prints the correct number of arguments for most system calls rather than printing extra arguments for any call not listed in the table in syscalls.c. - Actually check the new ABI when processes call exec. The comments claimed that this happened but it was not being done (perhaps this was another regression in the conversion to ptrace()). If the new ABI after exec is not supported, truss detaches from the process. If truss does not support the ABI for a newly executed process the process is killed before it returns from exec. - Along with the refactor, teach the various ABI-specific backends to fetch both return values, not just the first. Use this to properly report the full 64-bit return value from lseek(). In addition, the handler for "pipe" now pulls the pair of descriptors out of the return values (which is the true kernel system call interface) but displays them as an argument (which matches the interface exported by libc). - Each ABI handler adds entries to a linker set rather than requiring a statically defined table of handlers in main.c. - The arm and mips system call fetching code was changed to follow the same pattern as amd64 (and the in-kernel handler) of fetching register arguments first and then reading any remaining arguments from the stack. This should fix indirect system call arguments on at least arm. - The mipsn32 and n64 ABIs will now look for arguments in A4 through A7. - Use register %ebp for the 6th system call argument for Linux/i386 ABIs to match the in-kernel argument fetch code. - For powerpc binaries on a powerpc64 system, fetch the extra arguments on the stack as 32-bit values that are then copied into the 64-bit argument array instead of reading the 32-bit values directly into the 64-bit array. Reviewed by: kib (earlier version) Tested on: amd64 (FreeBSD/amd64 & i386), i386, arm (earlier version) Tested on: powerpc64 (FreeBSD/powerpc64 & powerpc) MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D3575
* Handle the conditional decoding of execve() argument and environmentjhb2015-08-201-22/+0
| | | | | | | | | arrays generically rather than duplicating a hack in all of the backends. - Add two new system call argument types and use them instead of StringArray for the argument and environment arguments execve and linux_execve. - Honor the -a/-e flags in the handling of these new types. - Instead of printing "<missing argument>" when the decoding is disabled, print the raw pointer value.
* Various style and whitespace fixes.jhb2015-08-191-0/+1
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* Use nitems().jhb2015-08-191-1/+1
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* truss: follow pdfork()ed descendents with -femaste2015-07-241-0/+1
| | | | | | | | | PR: 201276 Reported by: David Drysdale Reviewed by: oshogbo MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D2976
* - Make truss thread-aware.zont2012-09-161-69/+77
| | | | | Approved by: kib (mentor) MFC after: 2 weeks
* - Style(9) cleanup.zont2012-09-021-209/+210
| | | | Approved by: kib (mentor)
* - Remove unused variables.zont2012-08-301-2/+1
| | | | | | - Fix warnings about comparing signed and unsigned ints. Approved by: kib (mentor)
* Fix typos in comments, no functional changes.bcr2011-05-191-1/+1
| | | | | | Found by: codespell Reviewed by: alfred MFC after: 1 week
* s/sytem/system in comments, no functional changes.bcr2010-10-131-1/+1
| | | | Reviewed by: alfred@
* Fix breakage introduced in r211725 and improve functionality of truss onnwhitehorn2010-08-281-0/+5
| | | | 64-bit powerpc by adding 32-bit compatibility features.
* Fix copyright spelling.imp2010-03-101-2/+2
| | | | | PR: 139825 Submitted by: Ruslan Mahmatkhanov
* Correct off-by-one issue in truss(1) which happens when system call numberdelphij2009-05-281-1/+1
| | | | | | | | is nsyscalls. PR: bin/134916 Submitted by: Steven Hartland <steven hartland multiplay co uk> MFC after: 2 weeks
* Reduce diff against my local version: replace malloc+memset() cases to calloc().delphij2009-05-151-2/+1
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* Add -c option to summarize number of calls, errors, and system time.dds2009-05-121-1/+2
| | | | Reviewed by: alfred
* Fix handling of Quad-type arguments. Previously, syscallsmarcel2007-07-281-0/+3
| | | | | | | | | | | | | | | | | containing 64-bit arguments would have explicit padding. On 64-bit platforms there was no padding, so the dummy argument was not covering anything. On 32-bit platforms with weak alignment (i.e. i386) the 64-bit argument did not need to be aligned, so there too an aditional argument was introduced. On 32-bit platforms with strong alignment (i.e. PowerPC) the dummy argument in fact cover the padding. By elimininating the dummy argument, 64-bit platforms now have 1 argument less. This also applies to 32-bit platforms with weak alignment. On PowerPC this doesn't matter, because the padding is still there. We just don't "name" it. Deal with those 3 cases. Approved by: re (kensmith)
* MFp4: Bugfixes for truss(1):delphij2007-06-261-10/+9
| | | | | | | | | | | - Fix logic handling execve(). We will not be able to obtain information otherwise. - truss coredump [1]. - truss does not work against itself [2]. PR: bin/58970 [1], bin/45193 [2] Submitted by: Howard Su Approved by: re (kensmith)
* Make use of ptrace(2) instead of procfs in truss(1), eliminatingdelphij2007-04-101-31/+17
| | | | | | | | yet another need of an available /proc/ mount. Tested with: make universe Submitted by: howardsu Reviewed by: alfred
* Add powerpc support for truss.grehan2006-01-051-0/+350
Initial work by: Orlando Bassotto < orlando at break net > Modified by: grehan
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