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Provide access to the general regs on FreeBSD.

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This commit is contained in:
Konstantin Belousov 2010-03-06 16:17:21 +02:00
parent cf6ae3548f
commit d4a4ddd23d
3 changed files with 73 additions and 0 deletions
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7
configure.in
View file

@ -73,6 +73,13 @@ AC_CHECK_DECLS(PT_IO, [], [],
#endif
#include <sys/ptrace.h>
])
AC_CHECK_DECLS(PT_GETREGS, [], [],
[$ac_includes_default
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <sys/ptrace.h>
])
AC_CHECK_DECLS(PT_GETFPREGS, [], [],
[$ac_includes_default
#if HAVE_SYS_TYPES_H

38
src/ptrace/_UPT_access_reg.c
View file

@ -33,6 +33,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
# include "tdep-ia64/rse.h"
#endif
#if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE
int
_UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
int write, void *arg)
@ -252,3 +253,40 @@ _UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
Debug (1, "bad register number %u (error: %s)\n", reg, strerror (errno));
return -UNW_EBADREG;
}
#elif HAVE_DECL_PT_GETREGS
int
_UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
int write, void *arg)
{
struct UPT_info *ui = arg;
pid_t pid = ui->pid;
gregset_t regs;
char *r;
#if UNW_DEBUG
if (write)
Debug (16, "%s <- %lx\n", unw_regname (reg), (long) *val);
#endif
if ((unsigned) reg >= sizeof (_UPT_reg_offset) / sizeof (_UPT_reg_offset[0]))
{
errno = EINVAL;
goto badreg;
}
r = (char *)&regs + _UPT_reg_offset[reg];
if (ptrace(PT_GETREGS, pid, (caddr_t)&regs, 0) == -1)
goto badreg;
if (write) {
memcpy(r, val, sizeof(unw_word_t));
if (ptrace(PT_SETREGS, pid, (caddr_t)&regs, 0) == -1)
goto badreg;
} else
memcpy(val, r, sizeof(unw_word_t));
return 0;
badreg:
Debug (1, "bad register number %u (error: %s)\n", reg, strerror (errno));
return -UNW_EBADREG;
}
#else
#error Port me
#endif

28
src/ptrace/_UPT_reg_offset.c
View file

@ -25,6 +25,8 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "_UPT_internal.h"
#include <stddef.h>
#ifdef HAVE_ASM_PTRACE_OFFSETS_H
# include <asm/ptrace_offsets.h>
#endif
@ -265,6 +267,31 @@ int _UPT_reg_offset[UNW_REG_LAST + 1] =
/* EFLAGS = 0x38, */
/* SS = 0x40 */
#elif defined(UNW_TARGET_X86_64)
#if defined(__FreeBSD__)
#define UNW_R_OFF(R, r) \
[UNW_X86_64_##R] = offsetof(gregset_t, r_##r),
UNW_R_OFF(RAX, rax)
UNW_R_OFF(RDX, rdx)
UNW_R_OFF(RCX, rcx)
UNW_R_OFF(RBX, rbx)
UNW_R_OFF(RSI, rsi)
UNW_R_OFF(RDI, rdi)
UNW_R_OFF(RBP, rbp)
UNW_R_OFF(RSP, rsp)
UNW_R_OFF(R8, r8)
UNW_R_OFF(R9, r9)
UNW_R_OFF(R10, r10)
UNW_R_OFF(R11, r11)
UNW_R_OFF(R12, r12)
UNW_R_OFF(R13, r13)
UNW_R_OFF(R14, r14)
UNW_R_OFF(R15, r15)
UNW_R_OFF(RIP, rip)
// UNW_R_OFF(CS, cs)
// UNW_R_OFF(EFLAGS, rflags)
// UNW_R_OFF(SS, ss)
#undef UNW_R_OFF
#else
[UNW_X86_64_RAX] = 0x50,
[UNW_X86_64_RDX] = 0x60,
[UNW_X86_64_RCX] = 0x58,
@ -286,6 +313,7 @@ int _UPT_reg_offset[UNW_REG_LAST + 1] =
// [UNW_X86_64_EFLAGS] = 0x90,
// [UNW_X86_64_RSP] = 0x98,
// [UNW_X86_64_SS] = 0xa0
#endif
#elif defined(UNW_TARGET_PPC32)
#elif defined(UNW_TARGET_PPC64)
#elif defined(UNW_TARGET_ARM)