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| author | Andrew Cagney <cagney@redhat.com> | 2004-07-21 16:17:56 +0000 |
|---|---|---|
| committer | Andrew Cagney <cagney@redhat.com> | 2004-07-21 16:17:56 +0000 |
| commit | 73cc75f3b22c0bb899f4f91727e8c3e01f289824 (patch) | |
| tree | 0277ecde93c022fec73230277293c9b6b0576fed /gdb | |
| parent | 20f0a1fc7d3349b326456c16297278dccd2686c9 (diff) | |
| download | gdb-73cc75f3b22c0bb899f4f91727e8c3e01f289824.zip gdb-73cc75f3b22c0bb899f4f91727e8c3e01f289824.tar.gz gdb-73cc75f3b22c0bb899f4f91727e8c3e01f289824.tar.bz2 | |
2004-07-21 Andrew Cagney <cagney@gnu.org>
* PROBLEMS: Mention breakpoints/1702.
* NEWS: For signal trampolines, cite s390 GNU/Linux as a system
that is known to work.
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/NEWS | 5 | ||||
| -rw-r--r-- | gdb/PROBLEMS | 13 |
3 files changed, 22 insertions, 2 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 73d44413..6690fd4 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,11 @@ 2004-07-21 Andrew Cagney <cagney@gnu.org> + * PROBLEMS: Mention breakpoints/1702. + * NEWS: For signal trampolines, cite s390 GNU/Linux as a system + that is known to work. + +2004-07-21 Andrew Cagney <cagney@gnu.org> + * config/mips/tm-mips.h (DEPRECATED_IGNORE_HELPER_CALL): Deprecate. * mips-tdep.c (mips_dump_tdep, mips_ignore_helper): Update. * infrun.c (DEPRECATED_IGNORE_HELPER_CALL): Delete macro. @@ -38,8 +38,9 @@ of sa_sigaction signal trampolines; backtrace from a NULL pointer call; backtrace through a signal trampoline; step into and out of signal handlers; and single-stepping in the signal trampoline. -These fixes were tested on i386 GNU/Linux systems that include a 2.4 -kernel. +Please note that kernel bugs are a limiting factor here. These +features have been shown to work on an s390 GNU/Linux system that +include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. * Cygwin support for DWARF 2 added. diff --git a/gdb/PROBLEMS b/gdb/PROBLEMS index 7baf1d2..2bb66bb 100644 --- a/gdb/PROBLEMS +++ b/gdb/PROBLEMS @@ -94,6 +94,19 @@ implement virtual base classes. gcc 2.x generated just one object code function with a hidden parameter, but gcc 3.x conforms to a multi-vendor ABI for C++ which requires multiple object code functions. +*** Signal handlers + +On many systems an attempt to single-step a system-call instruction +results in two or more instructions being executed (the system-call, +and one or more instructions following). + +When attempting to single-step through a signal trampoline, this +problem may result the program unintentionally running to completion, +or re-execute the faulting instruction, or even corrupting the program +counter. + +Ref: PR breakpoints/1702. + *** Stack backtraces GDB's core code base has been updated to use a new backtrace |