diff options
Diffstat (limited to 'gdb/i386fbsd-tdep.c')
| -rw-r--r-- | gdb/i386fbsd-tdep.c | 65 |
1 files changed, 64 insertions, 1 deletions
diff --git a/gdb/i386fbsd-tdep.c b/gdb/i386fbsd-tdep.c index 50243be..6b42abb 100644 --- a/gdb/i386fbsd-tdep.c +++ b/gdb/i386fbsd-tdep.c @@ -1,6 +1,6 @@ /* 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. @@ -21,10 +21,15 @@ #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. */ @@ -65,6 +70,60 @@ static int i386fbsd_sc_reg_offset[] = 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) { @@ -90,6 +149,10 @@ 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 |