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Code to read/write fpregs on FreeBSD

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This commit is contained in:
Konstantin Belousov 2010-03-06 14:55:11 +02:00
parent 905034ce72
commit d11456ffbf
3 changed files with 60 additions and 3 deletions
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18
configure.in
View file

@ -28,7 +28,8 @@ CHECK_ATOMIC_OPS
dnl Checks for header files. dnl Checks for header files.
AC_HEADER_STDC AC_HEADER_STDC
AC_CHECK_HEADERS(asm/ptrace_offsets.h endian.h sys/endian.h execinfo.h \ AC_CHECK_HEADERS(asm/ptrace_offsets.h endian.h sys/endian.h execinfo.h \
ia64intrin.h sys/uc_access.h unistd.h signal.h sys/types.h) ia64intrin.h sys/uc_access.h unistd.h signal.h sys/types.h \
sys/procfs.h)
dnl Checks for typedefs, structures, and compiler characteristics. dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST AC_C_CONST
@ -51,6 +52,21 @@ AC_CHECK_TYPES([sighandler_t], [], [],
#endif #endif
]) ])
AC_CHECK_DECLS(PTRACE_POKEUSER, [], [],
[$ac_includes_default
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <sys/ptrace.h>
])
AC_CHECK_DECLS(PT_GETFPREGS, [], [],
[$ac_includes_default
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <sys/ptrace.h>
])
dnl Checks for library functions. dnl Checks for library functions.
AC_FUNC_MEMCMP AC_FUNC_MEMCMP
AC_TYPE_SIGNAL AC_TYPE_SIGNAL

39
src/ptrace/_UPT_access_fpreg.c
View file

@ -25,6 +25,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "_UPT_internal.h" #include "_UPT_internal.h"
#if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE
int int
_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
int write, void *arg) int write, void *arg)
@ -64,3 +65,41 @@ _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
} }
return 0; return 0;
} }
#elif HAVE_DECL_PT_GETFPREGS
int
_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
int write, void *arg)
{
unw_word_t *wp = (unw_word_t *) val;
struct UPT_info *ui = arg;
pid_t pid = ui->pid;
fpregset_t fpreg;
if ((unsigned) reg >= sizeof (_UPT_reg_offset) / sizeof (_UPT_reg_offset[0]))
return -UNW_EBADREG;
if (ptrace(PT_GETFPREGS, pid, &fpreg, 0) == -1)
return -UNW_EBADREG;
if (write) {
#if defined(__amd64__)
memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t));
#elif defined(__i386__)
memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t));
#else
#error Fix me
#endif
if (ptrace(PT_SETFPREGS, pid, &fpreg, 0) == -1)
return -UNW_EBADREG;
} else
#if defined(__amd64__)
memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t));
#elif defined(__i386__)
memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t));
#else
#error Fix me
#endif
return 0;
}
#else
#error Fix me
#endif

6
src/ptrace/_UPT_internal.h
View file

@ -33,6 +33,10 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#ifdef HAVE_SYS_TYPES_H #ifdef HAVE_SYS_TYPES_H
#include <sys/types.h> #include <sys/types.h>
#endif #endif
#include <sys/ptrace.h>
#ifdef HAVE_SYS_PROCFS_H
#include <sys/procfs.h>
#endif
#include <errno.h> #include <errno.h>
#include <libunwind-ptrace.h> #include <libunwind-ptrace.h>
@ -40,8 +44,6 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/ptrace.h>
#include "libunwind_i.h" #include "libunwind_i.h"
struct UPT_info struct UPT_info