diff options
Diffstat (limited to 'gdb/arch-utils.c')
| -rw-r--r-- | gdb/arch-utils.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c index 2c8b34b..c1816da 100644 --- a/gdb/arch-utils.c +++ b/gdb/arch-utils.c @@ -31,12 +31,64 @@ #include "gdbcore.h" #include "osabi.h" #include "target-descriptions.h" +#include "objfiles.h" #include "version.h" #include "floatformat.h" +struct displaced_step_closure * +simple_displaced_step_copy_insn (struct gdbarch *gdbarch, + CORE_ADDR from, CORE_ADDR to, + struct regcache *regs) +{ + size_t len = gdbarch_max_insn_length (gdbarch); + gdb_byte *buf = xmalloc (len); + + read_memory (from, buf, len); + write_memory (to, buf, len); + + if (debug_displaced) + { + fprintf_unfiltered (gdb_stdlog, "displaced: copy 0x%s->0x%s: ", + paddr_nz (from), paddr_nz (to)); + displaced_step_dump_bytes (gdb_stdlog, buf, len); + } + + return (struct displaced_step_closure *) buf; +} + + +void +simple_displaced_step_free_closure (struct gdbarch *gdbarch, + struct displaced_step_closure *closure) +{ + xfree (closure); +} + + +CORE_ADDR +displaced_step_at_entry_point (struct gdbarch *gdbarch) +{ + CORE_ADDR addr; + int bp_len; + + addr = entry_point_address (); + + /* Make certain that the address points at real code, and not a + function descriptor. */ + addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, ¤t_target); + + /* Inferior calls also use the entry point as a breakpoint location. + We don't want displaced stepping to interfere with those + breakpoints, so leave space. */ + gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); + addr += bp_len * 2; + + return addr; +} + int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum) { |