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-rw-r--r--gdb/arm-linux-nat.c148
1 files changed, 141 insertions, 7 deletions
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c
index ce3f881..05b48a7 100644
--- a/gdb/arm-linux-nat.c
+++ b/gdb/arm-linux-nat.c
@@ -26,6 +26,8 @@
#include "regcache.h"
#include "target.h"
#include "linux-nat.h"
+#include "target-descriptions.h"
+#include "xml-support.h"
#include "arm-tdep.h"
#include "arm-linux-tdep.h"
@@ -45,6 +47,14 @@
#define PTRACE_GET_THREAD_AREA 22
#endif
+#ifndef PTRACE_GETWMMXREGS
+#define PTRACE_GETWMMXREGS 18
+#define PTRACE_SETWMMXREGS 19
+#endif
+
+/* A flag for whether the WMMX registers are available. */
+static int arm_linux_has_wmmx_registers;
+
extern int arm_apcs_32;
/* The following variables are used to determine the version of the
@@ -77,7 +87,7 @@ get_thread_id (ptid_t ptid)
tid = PIDGET (ptid);
return tid;
}
-#define GET_THREAD_ID(PTID) get_thread_id ((PTID));
+#define GET_THREAD_ID(PTID) get_thread_id (PTID)
/* Get the value of a particular register from the floating point
state of the process and store it into regcache. */
@@ -363,6 +373,80 @@ store_regs (void)
}
}
+/* Fetch all WMMX registers of the process and store into
+ regcache. */
+
+#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
+
+static void
+fetch_wmmx_regs (void)
+{
+ char regbuf[IWMMXT_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch WMMX registers."));
+ return;
+ }
+
+ for (regno = 0; regno < 16; regno++)
+ regcache_raw_supply (current_regcache, regno + ARM_WR0_REGNUM,
+ &regbuf[regno * 8]);
+
+ for (regno = 0; regno < 2; regno++)
+ regcache_raw_supply (current_regcache, regno + ARM_WCSSF_REGNUM,
+ &regbuf[16 * 8 + regno * 4]);
+
+ for (regno = 0; regno < 4; regno++)
+ regcache_raw_supply (current_regcache, regno + ARM_WCGR0_REGNUM,
+ &regbuf[16 * 8 + 2 * 4 + regno * 4]);
+}
+
+static void
+store_wmmx_regs (void)
+{
+ char regbuf[IWMMXT_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch WMMX registers."));
+ return;
+ }
+
+ for (regno = 0; regno < 16; regno++)
+ if (register_cached (regno + ARM_WR0_REGNUM))
+ regcache_raw_collect (current_regcache, regno + ARM_WR0_REGNUM,
+ &regbuf[regno * 8]);
+
+ for (regno = 0; regno < 2; regno++)
+ if (register_cached (regno + ARM_WCSSF_REGNUM))
+ regcache_raw_collect (current_regcache, regno + ARM_WCSSF_REGNUM,
+ &regbuf[16 * 8 + regno * 4]);
+
+ for (regno = 0; regno < 4; regno++)
+ if (register_cached (regno + ARM_WCGR0_REGNUM))
+ regcache_raw_collect (current_regcache, regno + ARM_WCGR0_REGNUM,
+ &regbuf[16 * 8 + 2 * 4 + regno * 4]);
+
+ ret = ptrace (PTRACE_SETWMMXREGS, tid, 0, regbuf);
+
+ if (ret < 0)
+ {
+ warning (_("Unable to store WMMX registers."));
+ return;
+ }
+}
+
/* Fetch registers from the child process. Fetch all registers if
regno == -1, otherwise fetch all general registers or all floating
point registers depending upon the value of regno. */
@@ -374,14 +458,18 @@ arm_linux_fetch_inferior_registers (int regno)
{
fetch_regs ();
fetch_fpregs ();
+ if (arm_linux_has_wmmx_registers)
+ fetch_wmmx_regs ();
}
else
{
- if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
+ if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
fetch_register (regno);
-
- if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
+ else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
fetch_fpregister (regno);
+ else if (arm_linux_has_wmmx_registers
+ && regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
+ fetch_wmmx_regs ();
}
}
@@ -396,14 +484,18 @@ arm_linux_store_inferior_registers (int regno)
{
store_regs ();
store_fpregs ();
+ if (arm_linux_has_wmmx_registers)
+ store_wmmx_regs ();
}
else
{
- if ((regno < ARM_F0_REGNUM) || (regno > ARM_FPS_REGNUM))
+ if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
store_register (regno);
-
- if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
+ else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
store_fpregister (regno);
+ else if (arm_linux_has_wmmx_registers
+ && regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
+ store_wmmx_regs ();
}
}
@@ -485,6 +577,44 @@ get_linux_version (unsigned int *vmajor,
return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
}
+static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
+ const char *, gdb_byte *, const gdb_byte *,
+ ULONGEST, LONGEST);
+
+static LONGEST
+arm_linux_xfer_partial (struct target_ops *ops,
+ enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (object == TARGET_OBJECT_AVAILABLE_FEATURES)
+ {
+ if (annex != NULL && strcmp (annex, "target.xml") == 0)
+ {
+ int ret;
+ char regbuf[IWMMXT_REGS_SIZE];
+
+ ret = ptrace (PTRACE_GETWMMXREGS, GET_THREAD_ID (inferior_ptid),
+ 0, regbuf);
+ if (ret < 0)
+ arm_linux_has_wmmx_registers = 0;
+ else
+ arm_linux_has_wmmx_registers = 1;
+
+ if (arm_linux_has_wmmx_registers)
+ annex = "arm-with-iwmmxt.xml";
+ else
+ return -1;
+ }
+
+ return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
+ }
+
+ return super_xfer_partial (ops, object, annex, readbuf, writebuf,
+ offset, len);
+}
+
void _initialize_arm_linux_nat (void);
void
@@ -501,6 +631,10 @@ _initialize_arm_linux_nat (void)
t->to_fetch_registers = arm_linux_fetch_inferior_registers;
t->to_store_registers = arm_linux_store_inferior_registers;
+ /* Override the default to_xfer_partial. */
+ super_xfer_partial = t->to_xfer_partial;
+ t->to_xfer_partial = arm_linux_xfer_partial;
+
/* Register the target. */
linux_nat_add_target (t);
}
generated by cgit v1.1 at 2024-12-02 13:02:46 +0000