diff options
Diffstat (limited to 'contrib/gdb/gdb/mem-break.c')
| -rw-r--r-- | contrib/gdb/gdb/mem-break.c | 57 |
1 files changed, 8 insertions, 49 deletions
diff --git a/contrib/gdb/gdb/mem-break.c b/contrib/gdb/gdb/mem-break.c index a67e2a5..96750c8 100644 --- a/contrib/gdb/gdb/mem-break.c +++ b/contrib/gdb/gdb/mem-break.c @@ -1,6 +1,8 @@ /* Simulate breakpoints by patching locations in the target system, for GDB. - Copyright 1990, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2000 - Free Software Foundation, Inc. + + Copyright 1990, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2000, + 2002 Free Software Foundation, Inc. + Contributed by Cygnus Support. Written by John Gilmore. This file is part of GDB. @@ -22,7 +24,8 @@ #include "defs.h" -/* This file is only useful if BREAKPOINT is set. If not, we punt. */ +/* This file is only useful if BREAKPOINT_FROM_PC is set. If not, we + punt. */ #include "symtab.h" #include "breakpoint.h" @@ -30,50 +33,6 @@ #include "target.h" -/* Use the program counter to determine the contents and size - of a breakpoint instruction. If no target-dependent macro - BREAKPOINT_FROM_PC has been defined to implement this function, - assume that the breakpoint doesn't depend on the PC, and - use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. - Return a pointer to a string of bytes that encode a breakpoint - instruction, stores the length of the string to *lenptr, - and optionally adjust the pc to point to the correct memory location - for inserting the breakpoint. */ - -unsigned char * -memory_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) -{ - /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a - breakpoint. On some machines, breakpoints are handled by the - target environment and we don't have to worry about them here. */ -#ifdef BIG_BREAKPOINT - if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) - { - static unsigned char big_break_insn[] = BIG_BREAKPOINT; - *lenptr = sizeof (big_break_insn); - return big_break_insn; - } -#endif -#ifdef LITTLE_BREAKPOINT - if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) - { - static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; - *lenptr = sizeof (little_break_insn); - return little_break_insn; - } -#endif -#ifdef BREAKPOINT - { - static unsigned char break_insn[] = BREAKPOINT; - *lenptr = sizeof (break_insn); - return break_insn; - } -#endif - *lenptr = 0; - return NULL; -} - - /* Insert a breakpoint on targets that don't have any better breakpoint support. We read the contents of the target location and stash it, then overwrite it with a breakpoint instruction. ADDR is the target @@ -86,7 +45,7 @@ int default_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache) { int val; - unsigned char *bp; + const unsigned char *bp; int bplen; /* Determine appropriate breakpoint contents and size for this address. */ @@ -108,7 +67,7 @@ default_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache) int default_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache) { - unsigned char *bp; + const unsigned char *bp; int bplen; /* Determine appropriate breakpoint contents and size for this address. */ |
