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| author | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2015-08-27 19:20:29 +0200 |
|---|---|---|
| committer | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2015-08-27 19:26:31 +0200 |
| commit | 1db33b5a028820d1eb656bffff727090a5504253 (patch) | |
| tree | 001b6d43cec72c816c611940b6b6344c1a1d8f8b /gdb/nat | |
| parent | e0fd7c47bd01e0a6eecf5dec4a4be958f8b3bbc8 (diff) | |
| download | gdb-1db33b5a028820d1eb656bffff727090a5504253.zip gdb-1db33b5a028820d1eb656bffff727090a5504253.tar.gz gdb-1db33b5a028820d1eb656bffff727090a5504253.tar.bz2 | |
Detect SW breakpoints in Cell/B.E. combined debugging
The Linux target and gdbserver now check the siginfo si_code
reported on a SIGTRAP to detect whether the trap indicates
a software breakpoint was hit.
Unfortunately, on Cell/B.E., the kernel uses an si_code value
of TRAP_BRKPT when a SW breakpoint was hit in PowerPC code,
but a si_code value of SI_KERNEL when a SW breakpoint was
hit in SPU code.
This patch updates Linux target and gdbserver to accept both
si_code values to indicate SW breakpoint on PowerPC.
ChangeLog:
* nat/linux-ptrace.h (GDB_ARCH_TRAP_BRKPT): Replace by ...
(GDB_ARCH_IS_TRAP_BRKPT): ... this. Add __powerpc__ case.
* linux-nat.c (check_stopped_by_breakpoint): Use
GDB_ARCH_IS_TRAP_BRKPT instead of GDB_ARCH_TRAP_BRKPT.
gdbserver/ChangeLog:
* linux-low.c (check_stopped_by_breakpoint): Use
GDB_ARCH_IS_TRAP_BRKPT instead of GDB_ARCH_TRAP_BRKPT.
Diffstat (limited to 'gdb/nat')
| -rw-r--r-- | gdb/nat/linux-ptrace.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/gdb/nat/linux-ptrace.h b/gdb/nat/linux-ptrace.h index 41f668c..8bff908 100644 --- a/gdb/nat/linux-ptrace.h +++ b/gdb/nat/linux-ptrace.h @@ -135,12 +135,19 @@ struct buffer; running to a breakpoint and checking what comes out of siginfo->si_code. - The generic Linux target code should use GDB_ARCH_TRAP_BRKPT - instead of TRAP_BRKPT to abstract out this x86 peculiarity. */ + The ppc kernel does use TRAP_BRKPT for software breakpoints + in PowerPC code, but it uses SI_KERNEL for software breakpoints + in SPU code on a Cell/B.E. However, SI_KERNEL is never seen + on a SIGTRAP for any other reason. + + The generic Linux target code should use GDB_ARCH_IS_TRAP_BRKPT + instead of TRAP_BRKPT to abstract out these peculiarities. */ #if defined __i386__ || defined __x86_64__ -# define GDB_ARCH_TRAP_BRKPT SI_KERNEL +# define GDB_ARCH_IS_TRAP_BRKPT(X) ((X) == SI_KERNEL) +#elif defined __powerpc__ +# define GDB_ARCH_IS_TRAP_BRKPT(X) ((X) == SI_KERNEL || (X) == TRAP_BRKPT) #else -# define GDB_ARCH_TRAP_BRKPT TRAP_BRKPT +# define GDB_ARCH_IS_TRAP_BRKPT(X) ((X) == TRAP_BRKPT) #endif #ifndef TRAP_HWBKPT |