diff options
Diffstat (limited to 'gdb/i386nbsd-tdep.c')
| -rw-r--r-- | gdb/i386nbsd-tdep.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/gdb/i386nbsd-tdep.c b/gdb/i386nbsd-tdep.c index 634101a..cba2f19 100644 --- a/gdb/i386nbsd-tdep.c +++ b/gdb/i386nbsd-tdep.c @@ -23,8 +23,11 @@ #include "gdbtypes.h" #include "gdbcore.h" #include "regcache.h" +#include "arch-utils.h" +#include "i386-tdep.h" #include "i387-tdep.h" +#include "nbsd-tdep.h" /* Map a GDB register number to an offset in the reg structure. */ static int regmap[] = @@ -137,9 +140,85 @@ static struct core_fns i386nbsd_elfcore_fns = NULL /* next */ }; +static int +i386nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + + /* Check for libc-provided signal trampoline. */ + if (nbsd_pc_in_sigtramp (pc, name)) + return 1; + + /* FIXME: sigtramp_start/sigtramp_end need to go away; we should + not be assuming the location of the kernel-provided trampoline! */ + + return (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end); +} + +CORE_ADDR i386nbsd_sigtramp_start = 0xbfbfdf20; +CORE_ADDR i386nbsd_sigtramp_end = 0xbfbfdff0; + +/* From <machine/signal.h>. */ +int i386nbsd_sc_pc_offset = 44; +int i386nbsd_sc_sp_offset = 56; + +static void +i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + /* Obviously NetBSD is BSD-based. */ + i386bsd_init_abi (info, gdbarch); + + /* NetBSD has different signal trampoline conventions. */ + set_gdbarch_pc_in_sigtramp (gdbarch, i386nbsd_pc_in_sigtramp); + + /* NetBSD uses -freg-struct-return by default. */ + tdep->struct_return = reg_struct_return; + + /* NetBSD uses a different memory layout. */ + tdep->sigtramp_start = i386nbsd_sigtramp_start; + tdep->sigtramp_end = i386nbsd_sigtramp_end; + + /* NetBSD has a `struct sigcontext' that's different from the + origional 4.3 BSD. */ + tdep->sc_pc_offset = i386nbsd_sc_pc_offset; + tdep->sc_sp_offset = i386nbsd_sc_sp_offset; +} + +/* NetBSD ELF. */ +static void +i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + /* It's still NetBSD. */ + i386nbsd_init_abi (info, gdbarch); + + /* But ELF-based. */ + i386_elf_init_abi (info, gdbarch); + + /* NetBSD ELF uses SVR4-style shared libraries. */ + set_gdbarch_in_solib_call_trampoline (gdbarch, + generic_in_solib_call_trampoline); + + /* NetBSD ELF uses -fpcc-struct-return by default. */ + tdep->struct_return = pcc_struct_return; + + /* We support the SSE registers on NetBSD ELF. */ + tdep->num_xmm_regs = I386_NUM_XREGS - 1; + set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS + + I386_NUM_XREGS); +} + void _initialize_i386nbsd_tdep (void) { add_core_fns (&i386nbsd_core_fns); add_core_fns (&i386nbsd_elfcore_fns); + + gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_AOUT, + i386nbsd_init_abi); + gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_ELF, + i386nbsdelf_init_abi); } |