diff options
| -rw-r--r-- | gdb/ChangeLog | 9 | ||||
| -rw-r--r-- | gdb/Makefile.in | 7 | ||||
| -rw-r--r-- | gdb/m68kbsd-tdep.c | 60 |
3 files changed, 73 insertions, 3 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 4331a31..019b4fb 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,12 @@ +2005-08-08 Mark Kettenis <kettenis@gnu.org> + + * tramp-frame.h (struct tramp_frame): Allow for 16 instructions + instead of 8. + * m68kbsd-tdep.c: Include "frame.h", "trad-frame.h" and + "tramp-frame.h". + (m68kobsd_sigtramp_cache_init): New function. + (m68kbsd_aout_init_abi): Prepend m68kobsd_sigtramp unwinder. + 2005-08-02 Fred Fish <fnf@specifix.com> * defs.h (parse_frame_specification): Remove prototype. diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 112e2f5..a8222ef 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -2218,9 +2218,10 @@ m68hc11-tdep.o: m68hc11-tdep.c $(defs_h) $(frame_h) $(frame_unwind_h) \ m68kbsd-nat.o: m68kbsd-nat.c $(defs_h) $(gdbcore_h) $(inferior_h) \ $(regcache_h) $(gdb_assert_h) $(m68k_tdep_h) $(inf_ptrace_h) \ $(bsd_kvm_h) -m68kbsd-tdep.o: m68kbsd-tdep.c $(defs_h) $(arch_utils_h) $(osabi_h) \ - $(regcache_h) $(regset_h) $(gdb_assert_h) $(gdb_string_h) \ - $(m68k_tdep_h) $(solib_svr4_h) +m68kbsd-tdep.o: m68kbsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \ + $(osabi_h) $(regcache_h) $(regset_h) $(trad_frame_h) \ + $(tramp_frame_h)$(gdb_assert_h) $(gdb_string_h) $(m68k_tdep_h) \ + $(solib_svr4_h) m68klinux-nat.o: m68klinux-nat.c $(defs_h) $(frame_h) $(inferior_h) \ $(language_h) $(gdbcore_h) $(gdb_string_h) $(regcache_h) \ $(m68k_tdep_h) $(gdb_stat_h) $(floatformat_h) $(target_h) \ diff --git a/gdb/m68kbsd-tdep.c b/gdb/m68kbsd-tdep.c index 73d968c..2b2c8c4 100644 --- a/gdb/m68kbsd-tdep.c +++ b/gdb/m68kbsd-tdep.c @@ -21,9 +21,12 @@ #include "defs.h" #include "arch-utils.h" +#include "frame.h" #include "osabi.h" #include "regcache.h" #include "regset.h" +#include "trad-frame.h" +#include "tramp-frame.h" #include "gdb_assert.h" #include "gdb_string.h" @@ -126,6 +129,61 @@ m68kbsd_regset_from_core_section (struct gdbarch *gdbarch, return NULL; } + + +/* Signal trampolines. */ + +static void +m68kobsd_sigtramp_cache_init (const struct tramp_frame *self, + struct frame_info *next_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func) +{ + CORE_ADDR addr, base, pc; + int regnum; + + base = frame_unwind_register_unsigned (next_frame, M68K_SP_REGNUM); + + /* The 'addql #4,%sp' instruction at offset 8 adjusts the stack + pointer. Adjust the frame base accordingly. */ + pc = frame_unwind_register_unsigned (next_frame, M68K_PC_REGNUM); + if ((pc - func) > 8) + base -= 4; + + /* Get frame pointer, stack pointer, program counter and processor + state from `struct sigcontext'. */ + addr = get_frame_memory_unsigned (next_frame, base + 8, 4); + trad_frame_set_reg_addr (this_cache, M68K_FP_REGNUM, addr + 8); + trad_frame_set_reg_addr (this_cache, M68K_SP_REGNUM, addr + 12); + trad_frame_set_reg_addr (this_cache, M68K_PC_REGNUM, addr + 20); + trad_frame_set_reg_addr (this_cache, M68K_PS_REGNUM, addr + 24); + + /* The sc_ap member of `struct sigcontext' points to additional + hardware state. Here we find the missing registers. */ + addr = get_frame_memory_unsigned (next_frame, addr + 16, 4) + 4; + for (regnum = M68K_D0_REGNUM; regnum < M68K_FP_REGNUM; regnum++, addr += 4) + trad_frame_set_reg_addr (this_cache, regnum, addr); + + /* Construct the frame ID using the function start. */ + trad_frame_set_id (this_cache, frame_id_build (base, func)); +} + +static const struct tramp_frame m68kobsd_sigtramp = { + SIGTRAMP_FRAME, + 2, + { + { 0x206f, -1 }, { 0x000c, -1}, /* moveal %sp@(12),%a0 */ + { 0x4e90, -1 }, /* jsr %a0@ */ + { 0x588f, -1 }, /* addql #4,%sp */ + { 0x4e41, -1 }, /* trap #1 */ + { 0x2f40, -1 }, { 0x0004, -1 }, /* moveal %d0,%sp@(4) */ + { 0x7001, -1 }, /* moveq #SYS_exit,%d0 */ + { 0x4e40, -1 }, /* trap #0 */ + { TRAMP_SENTINEL_INSN, -1 } + }, + m68kobsd_sigtramp_cache_init +}; + static void m68kbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) @@ -149,6 +207,8 @@ m68kbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) m68kbsd_init_abi (info, gdbarch); tdep->struct_return = reg_struct_return; + + tramp_frame_prepend_unwinder (gdbarch, &m68kobsd_sigtramp); } /* NetBSD ELF. */ |