diff options
Diffstat (limited to 'gdb/i386obsd-tdep.c')
| -rw-r--r-- | gdb/i386obsd-tdep.c | 102 |
1 files changed, 64 insertions, 38 deletions
diff --git a/gdb/i386obsd-tdep.c b/gdb/i386obsd-tdep.c index a7e944150df..ed7a771a900 100644 --- a/gdb/i386obsd-tdep.c +++ b/gdb/i386obsd-tdep.c @@ -1,4 +1,5 @@ /* Target-dependent code for OpenBSD/i386. + Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. @@ -23,60 +24,74 @@ #include "arch-utils.h" #include "gdbcore.h" #include "regcache.h" +#include "regset.h" #include "osabi.h" +#include "gdb_assert.h" +#include "gdb_string.h" + #include "i386-tdep.h" #include "i387-tdep.h" -/* Provide a prototype to silence -Wmissing-prototypes. */ -void _initialize_i386obsd_tdep (void); - -#define SIZEOF_STRUCT_REG (16 * 4) +/* From <machine/reg.h>. */ +static int i386obsd_r_reg_offset[] = +{ + 0 * 4, /* %eax */ + 1 * 4, /* %ecx */ + 2 * 4, /* %edx */ + 3 * 4, /* %ebx */ + 4 * 4, /* %esp */ + 5 * 4, /* %ebp */ + 6 * 4, /* %esi */ + 7 * 4, /* %edi */ + 8 * 4, /* %eip */ + 9 * 4, /* %eflags */ + 10 * 4, /* %cs */ + 11 * 4, /* %ss */ + 12 * 4, /* %ds */ + 13 * 4, /* %es */ + 14 * 4, /* %fs */ + 15 * 4 /* %gs */ +}; static void -i386obsd_supply_reg (char *regs, int regno) +i386obsd_aout_supply_regset (const struct regset *regset, + struct regcache *regcache, int regnum, + const void *regs, size_t len) { - int i; + const struct gdbarch_tdep *tdep = regset->descr; + + gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE); - for (i = 0; i <= 15; i++) - if (regno == i || regno == -1) - supply_register (i, regs + i * 4); + i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset); + i387_supply_fsave (regcache, regnum, (char *) regs + tdep->sizeof_gregset); } -static void -fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, - CORE_ADDR ignore) +const struct regset * +i386obsd_aout_regset_from_core_section (struct gdbarch *gdbarch, + const char *sect_name, + size_t sect_size) { - char *regs, *fsave; + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - /* We get everything from one section. */ - if (which != 0) - return; + /* OpenBSD a.out core dumps don't use seperate register sets for the + general-purpose and floating-point registers. */ - if (core_reg_size < (SIZEOF_STRUCT_REG + 108)) + if (strcmp (sect_name, ".reg") == 0 + && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE) { - warning ("Wrong size register set in core file."); - return; + if (tdep->gregset == NULL) + { + tdep->gregset = XMALLOC (struct regset); + tdep->gregset->descr = tdep; + tdep->gregset->supply_regset = i386obsd_aout_supply_regset; + } + return tdep->gregset; } - regs = core_reg_sect; - fsave = core_reg_sect + SIZEOF_STRUCT_REG; - - /* Integer registers. */ - i386obsd_supply_reg (regs, -1); - - /* Floating point registers. */ - i387_supply_fsave (current_regcache, -1, fsave); + return NULL; } -static struct core_fns i386obsd_core_fns = -{ - bfd_target_unknown_flavour, /* core_flavour */ - default_check_format, /* check_format */ - default_core_sniffer, /* core_sniffer */ - fetch_core_registers, /* core_read_registers */ - NULL /* next */ -}; CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20; @@ -111,6 +126,15 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Obviously OpenBSD is BSD-based. */ i386bsd_init_abi (info, gdbarch); + /* OpenBSD has a different `struct reg'. */ + tdep->gregset_reg_offset = i386obsd_r_reg_offset; + tdep->gregset_num_regs = ARRAY_SIZE (i386obsd_r_reg_offset); + tdep->sizeof_gregset = 16 * 4; + + /* OpenBSD has a single register set. */ + set_gdbarch_regset_from_core_section + (gdbarch, i386obsd_aout_regset_from_core_section); + /* OpenBSD uses -freg-struct-return by default. */ tdep->struct_return = reg_struct_return; @@ -121,14 +145,16 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* OpenBSD has a `struct sigcontext' that's different from the origional 4.3 BSD. */ tdep->sc_reg_offset = i386obsd_sc_reg_offset; - tdep->sc_num_regs = I386_NUM_GREGS; + tdep->sc_num_regs = ARRAY_SIZE (i386obsd_sc_reg_offset); } + + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_i386obsd_tdep (void); void _initialize_i386obsd_tdep (void) { - add_core_fns (&i386obsd_core_fns); - /* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are indistingushable from NetBSD/i386 a.out binaries, building a GDB that should support both these targets will probably not work as |