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* i386obsd-tdep.c: Update copyright year. Include

Browse Source 
"bsd-uthread.h".
(i386obsd_uthread_reg_offset): New variable.
(I386OBSD_UTHREAD_ESP_OFFSET): New define.
(i386obsd_supply_uthread, i386obsd_collect_uthread): New
functions.
(i386obsd_init_abi): Set supply_uthread and collect_uthread.
* Makefile.in (i386obsd-tdep.o): Update dependencies.
* config/i386/obsd.mt (TDEPFILES): Add bsd-uthread.o.
This commit is contained in:
Mark Kettenis 2005-01-23 19:35:05 +00:00
parent 7e69709c9e
commit a28109e0ab
4 changed files with 134 additions and 3 deletions
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12
gdb/ChangeLog
View File

@ -1,3 +1,15 @@
2005-01-23 Mark Kettenis <kettenis@gnu.org>
* i386obsd-tdep.c: Update copyright year. Include
"bsd-uthread.h".
(i386obsd_uthread_reg_offset): New variable.
(I386OBSD_UTHREAD_ESP_OFFSET): New define.
(i386obsd_supply_uthread, i386obsd_collect_uthread): New
functions.
(i386obsd_init_abi): Set supply_uthread and collect_uthread.
* Makefile.in (i386obsd-tdep.o): Update dependencies.
* config/i386/obsd.mt (TDEPFILES): Add bsd-uthread.o.
2005-01-23 Christopher Faylor <cgf@timesys.com>
* win32-nat.c: Update copyright year.

2
gdb/Makefile.in
View File

@ -2044,7 +2044,7 @@ i386obsd-nat.o: i386obsd-nat.c $(defs_h) $(i386_tdep_h)
i386obsd-tdep.o: i386obsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
$(gdbcore_h) $(regcache_h) $(regset_h) $(symtab_h) $(objfiles_h) \
$(osabi_h) $(target_h) $(gdb_assert_h) $(gdb_string_h) \
$(i386_tdep_h) $(i387_tdep_h) $(solib_svr4_h)
$(i386_tdep_h) $(i387_tdep_h) $(solib_svr4_h) $(bsd_uthread_h)
i386-sol2-nat.o: i386-sol2-nat.c $(defs_h) $(regcache_h) $(gregset_h) \
$(amd64_nat_h) $(amd64_tdep_h)
i386-sol2-tdep.o: i386-sol2-tdep.c $(defs_h) $(value_h) $(osabi_h) \

2
gdb/config/i386/obsd.mt
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@ -1,4 +1,4 @@
# Target: OpenBSD/i386
TDEPFILES= i386-tdep.o i387-tdep.o i386bsd-tdep.o i386obsd-tdep.o \
corelow.o solib.o solib-svr4.o
bsd-uthread.o corelow.o solib.o solib-svr4.o
DEPRECATED_TM_FILE= solib.h

121
gdb/i386obsd-tdep.c
View File

@ -1,7 +1,7 @@
/* Target-dependent code for OpenBSD/i386.
Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002,
2003, 2004
2003, 2004, 2005
Free Software Foundation, Inc.
This file is part of GDB.
@ -38,6 +38,7 @@
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "solib-svr4.h"
#include "bsd-uthread.h"
/* Support for signal handlers. */
@ -186,6 +187,120 @@ int i386obsd_sc_reg_offset[I386_NUM_GREGS] =
0 * 4 /* %gs */
};
/* From /usr/src/lib/libpthread/arch/i386/uthread_machdep.c. */
static int i386obsd_uthread_reg_offset[] =
{
11 * 4, /* %eax */
10 * 4, /* %ecx */
9 * 4, /* %edx */
8 * 4, /* %ebx */
-1, /* %esp */
6 * 4, /* %ebp */
5 * 4, /* %esi */
4 * 4, /* %edi */
12 * 4, /* %eip */
-1, /* %eflags */
13 * 4, /* %cs */
-1, /* %ss */
3 * 4, /* %ds */
2 * 4, /* %es */
1 * 4, /* %fs */
0 * 4 /* %gs */
};
/* Offset within the thread structure where we can find the saved
stack pointer (%esp). */
#define I386OBSD_UTHREAD_ESP_OFFSET 176
static void
i386obsd_supply_uthread (struct regcache *regcache,
int regnum, CORE_ADDR addr)
{
CORE_ADDR sp_addr = addr + I386OBSD_UTHREAD_ESP_OFFSET;
CORE_ADDR sp = 0;
char buf[4];
int i;
gdb_assert (regnum >= -1);
if (regnum == -1 || regnum == I386_ESP_REGNUM)
{
int offset;
/* Fetch stack pointer from thread structure. */
sp = read_memory_unsigned_integer (sp_addr, 4);
/* Adjust the stack pointer such that it looks as if we just
returned from _thread_machdep_switch. */
offset = i386obsd_uthread_reg_offset[I386_EIP_REGNUM] + 4;
store_unsigned_integer (buf, 4, sp + offset);
regcache_raw_supply (regcache, I386_ESP_REGNUM, buf);
}
for (i = 0; i < ARRAY_SIZE (i386obsd_uthread_reg_offset); i++)
{
if (i386obsd_uthread_reg_offset[i] != -1
&& (regnum == -1 || regnum == i))
{
/* Fetch stack pointer from thread structure (if we didn't
do so already). */
if (sp == 0)
sp = read_memory_unsigned_integer (sp_addr, 4);
/* Read the saved register from the stack frame. */
read_memory (sp + i386obsd_uthread_reg_offset[i], buf, 4);
regcache_raw_supply (regcache, i, buf);
}
}
}
static void
i386obsd_collect_uthread (const struct regcache *regcache,
int regnum, CORE_ADDR addr)
{
CORE_ADDR sp_addr = addr + I386OBSD_UTHREAD_ESP_OFFSET;
CORE_ADDR sp = 0;
char buf[4];
int i;
gdb_assert (regnum >= -1);
if (regnum == -1 || regnum == I386_ESP_REGNUM)
{
int offset;
/* Calculate the stack pointer (frame pointer) that will be
stored into the thread structure. */
offset = i386obsd_uthread_reg_offset[I386_EIP_REGNUM] + 4;
regcache_raw_collect (regcache, I386_ESP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 4) - offset;
/* Store the stack pointer. */
write_memory_unsigned_integer (sp_addr, 4, sp);
/* The stack pointer was (potentially) modified. Make sure we
build a proper stack frame. */
regnum = -1;
}
for (i = 0; i < ARRAY_SIZE (i386obsd_uthread_reg_offset); i++)
{
if (i386obsd_uthread_reg_offset[i] != -1
&& (regnum == -1 || regnum == i))
{
/* Fetch stack pointer from thread structure (if we didn't
calculate it already). */
if (sp == 0)
sp = read_memory_unsigned_integer (sp_addr, 4);
/* Write the register into the stack frame. */
regcache_raw_collect (regcache, i, buf);
write_memory (sp + i386obsd_uthread_reg_offset[i], buf, 4);
}
}
}
static void
i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
@ -211,6 +326,10 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
original 4.3 BSD. */
tdep->sc_reg_offset = i386obsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386obsd_sc_reg_offset);
/* OpenBSD provides a user-level threads implementation. */
bsd_uthread_set_supply_uthread (gdbarch, i386obsd_supply_uthread);
bsd_uthread_set_collect_uthread (gdbarch, i386obsd_collect_uthread);
}
/* OpenBSD a.out. */