diff options
Diffstat (limited to 'gdb/arm-linux-tdep.c')
| -rw-r--r-- | gdb/arm-linux-tdep.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index ac2f8e0..6049cf5 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -35,6 +35,15 @@ #include "symfile.h" #include "objfiles.h" +/* Under ARM Linux the traditional way of performing a breakpoint is to + execute a particular software interrupt, rather than use a particular + undefined instruction to provoke a trap. Upon exection of the software + interrupt the kernel stops the inferior with a SIGTRAP, and wakes the + debugger. Since ARM Linux is little endian, and doesn't support Thumb + at the moment we only override the ARM little-endian breakpoint. */ + +static const char arm_linux_arm_le_breakpoint[] = {0x01,0x00,0x9f,0xef}; + /* CALL_DUMMY_WORDS: This sequence of words is the instructions @@ -537,6 +546,8 @@ arm_linux_init_abi (struct gdbarch_info info, struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); tdep->lowest_pc = 0x8000; + tdep->arm_breakpoint = arm_linux_arm_le_breakpoint; + tdep->arm_breakpoint_size = sizeof (arm_linux_arm_le_breakpoint); } void |