/* Target-dependent code for FreeBSD/i386.
- Copyright 2003, 2004 Free Software Foundation, Inc.
+ Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "arch-utils.h"
+#include "gdbcore.h"
#include "osabi.h"
+#include "regcache.h"
+
+#include "gdb_assert.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
+#include "bsd-uthread.h"
#include "solib-svr4.h"
/* FreeBSD 3.0-RELEASE or later. */
8 + 16 * 4 /* %gs */
};
+/* From /usr/src/lib/libc/i386/_setjmp.S. */
+static int i386fbsd_jmp_buf_reg_offset[] =
+{
+ -1, /* %eax */
+ -1, /* %ecx */
+ -1, /* %edx */
+ 1 * 4, /* %ebx */
+ 2 * 4, /* %esp */
+ 3 * 4, /* %ebp */
+ 4 * 4, /* %esi */
+ 5 * 4, /* %edi */
+ 0 * 4 /* %eip */
+};
+
+static void
+i386fbsd_supply_uthread (struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ char buf[4];
+ int i;
+
+ gdb_assert (regnum >= -1);
+
+ for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
+ {
+ if (i386fbsd_jmp_buf_reg_offset[i] != -1
+ && (regnum == -1 || regnum == i))
+ {
+ read_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
+ regcache_raw_supply (regcache, i, buf);
+ }
+ }
+}
+
+static void
+i386fbsd_collect_uthread (const struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ char buf[4];
+ int i;
+
+ gdb_assert (regnum >= -1);
+
+ for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
+ {
+ if (i386fbsd_jmp_buf_reg_offset[i] != -1
+ && (regnum == -1 || regnum == i))
+ {
+ regcache_raw_collect (regcache, i, buf);
+ write_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
+ }
+ }
+}
+
static void
i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
/* FreeBSD has a more complete `struct sigcontext'. */
tdep->sc_reg_offset = i386fbsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset);
+
+ /* FreeBSD provides a user-level threads implementation. */
+ bsd_uthread_set_supply_uthread (gdbarch, i386fbsd_supply_uthread);
+ bsd_uthread_set_collect_uthread (gdbarch, i386fbsd_collect_uthread);
}
static void
i386_elf_init_abi (info, gdbarch);
/* FreeBSD ELF uses SVR4-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, generic_in_solib_call_trampoline);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}