#include "gdb_stat.h"
#endif
+#include "gdb_assert.h"
+
#if !defined (FETCH_INFERIOR_REGISTERS)
#include <sys/user.h> /* Probably need to poke the user structure */
#endif /* !FETCH_INFERIOR_REGISTERS */
#endif
}
\f
-/* Default the type of the ptrace transfer to int. */
-#ifndef PTRACE_XFER_TYPE
-#define PTRACE_XFER_TYPE int
-#endif
-#if !defined (FETCH_INFERIOR_REGISTERS)
+#ifndef FETCH_INFERIOR_REGISTERS
-#if !defined (offsetof)
+/* U_REGS_OFFSET is the offset of the registers within the u area. */
+#ifndef U_REGS_OFFSET
+
+#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
#endif
-/* U_REGS_OFFSET is the offset of the registers within the u area. */
-#if !defined (U_REGS_OFFSET)
#define U_REGS_OFFSET \
ptrace (PT_READ_U, PIDGET (inferior_ptid), \
(PTRACE_TYPE_ARG3) (offsetof (struct user, u_ar0)), 0) \
- KERNEL_U_ADDR
#endif
-/* Fetch one register. */
+/* Fetch register REGNUM from the inferior. */
static void
-fetch_register (int regno)
+fetch_register (int regnum)
{
- /* This isn't really an address. But ptrace thinks of it as one. */
- CORE_ADDR regaddr;
- char mess[128]; /* For messages */
- int i;
- unsigned int offset; /* Offset of registers within the u area. */
- char buf[MAX_REGISTER_SIZE];
- int tid;
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ int tid, i;
- if (CANNOT_FETCH_REGISTER (regno))
+ if (CANNOT_FETCH_REGISTER (regnum))
{
- regcache_raw_supply (current_regcache, regno, NULL);
+ regcache_raw_supply (current_regcache, regnum, NULL);
return;
}
- /* Overload thread id onto process id */
- if ((tid = TIDGET (inferior_ptid)) == 0)
- tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
+ /* GNU/Linux LWP ID's are process ID's. */
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
+
+ /* This isn't really an address. But ptrace thinks of it as one. */
+ addr = register_addr (regnum, U_REGS_OFFSET);
+ size = register_size (current_gdbarch, regnum);
- offset = U_REGS_OFFSET;
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = alloca (size);
- regaddr = register_addr (regno, offset);
- for (i = 0; i < register_size (current_gdbarch, regno); i += sizeof (PTRACE_XFER_TYPE))
+ /* Read the register contents from the inferior a chuck at the time. */
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
errno = 0;
- *(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
- (PTRACE_TYPE_ARG3) regaddr, 0);
- regaddr += sizeof (PTRACE_XFER_TYPE);
+ buf[i] = ptrace (PT_READ_U, tid, (PTRACE_TYPE_ARG3) addr, 0);
if (errno != 0)
- {
- sprintf (mess, "reading register %s (#%d)",
- REGISTER_NAME (regno), regno);
- perror_with_name (mess);
- }
+ error ("Couldn't read register %s (#%d): %s.", REGISTER_NAME (regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
}
- regcache_raw_supply (current_regcache, regno, buf);
+ regcache_raw_supply (current_regcache, regnum, buf);
}
-
-/* Fetch register values from the inferior.
- If REGNO is negative, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
+/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
+ for all registers. */
void
-fetch_inferior_registers (int regno)
+fetch_inferior_registers (int regnum)
{
- if (regno >= 0)
- {
- fetch_register (regno);
- }
+ if (regnum == -1)
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ fetch_register (regnum);
else
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- fetch_register (regno);
- }
- }
+ fetch_register (regnum);
}
-/* Store one register. */
+/* Store register REGNUM into the inferior. */
static void
-store_register (int regno)
+store_register (int regnum)
{
- /* This isn't really an address. But ptrace thinks of it as one. */
- CORE_ADDR regaddr;
- char mess[128]; /* For messages */
- int i;
- unsigned int offset; /* Offset of registers within the u area. */
- int tid;
- char buf[MAX_REGISTER_SIZE];
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ int tid, i;
- if (CANNOT_STORE_REGISTER (regno))
- {
- return;
- }
-
- /* Overload thread id onto process id */
- if ((tid = TIDGET (inferior_ptid)) == 0)
- tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
+ if (CANNOT_STORE_REGISTER (regnum))
+ return;
- offset = U_REGS_OFFSET;
+ /* GNU/Linux LWP ID's are process ID's. */
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
- regaddr = register_addr (regno, offset);
+ /* This isn't really an address. But ptrace thinks of it as one. */
+ addr = register_addr (regnum, U_REGS_OFFSET);
+ size = register_size (current_gdbarch, regnum);
- /* Put the contents of regno into a local buffer */
- regcache_raw_collect (current_regcache, regno, buf);
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = alloca (size);
- /* Store the local buffer into the inferior a chunk at the time. */
- for (i = 0; i < register_size (current_gdbarch, regno); i += sizeof (PTRACE_XFER_TYPE))
+ /* Write the register contents into the inferior a chunk at the time. */
+ regcache_raw_collect (current_regcache, regnum, buf);
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
errno = 0;
- ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) regaddr,
- *(PTRACE_XFER_TYPE *) (buf + i));
- regaddr += sizeof (PTRACE_XFER_TYPE);
+ ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) addr, buf[i]);
if (errno != 0)
- {
- sprintf (mess, "writing register %s (#%d)",
- REGISTER_NAME (regno), regno);
- perror_with_name (mess);
- }
+ error ("Couldn't write register %s (#%d): %s.", REGISTER_NAME (regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
}
}
-/* Store our register values back into the inferior.
- If REGNO is negative, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
+ this for all registers (including the floating point registers). */
void
-store_inferior_registers (int regno)
+store_inferior_registers (int regnum)
{
- if (regno >= 0)
- {
- store_register (regno);
- }
+ if (regnum == -1)
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ store_register (regnum);
else
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- store_register (regno);
- }
- }
+ store_register (regnum);
}
-#endif /* !defined (FETCH_INFERIOR_REGISTERS). */
+
+#endif /* not FETCH_INFERIOR_REGISTERS. */
\f
/* Set an upper limit on alloca. */
projects / binutils-gdb.git / commitdiff