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https://github.com/espressif/binutils-gdb.git
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* Makefile.in (XMLFILES): Include $(TDEP_XML).
(filenames_h): New variable. (clean): Clean up xml-builtin.c and stamp-xml. (arm-linux-nat.o): Update. * config/arm/linux.mh (TDEP_XML): Define. * arm-linux-nat.c (PTRACE_GETWMMXREGS, PTRACE_SETWMMXREGS): Define. (arm_linux_has_wmmx_registers): New. (GET_THREAD_ID): Fix typo. (IWMMXT_REGS_SIZE): Define. (fetch_wmmx_regs, store_wmmx_regs): New. (arm_linux_fetch_inferior_registers): Use fetch_wmmx_regs. (arm_linux_store_inferior_registers): Use store_wmmx_regs. (super_xfer_partial, arm_linux_xfer_partial): New. (_initialize_arm_linux_nat): Use them. * xml-support.c (fetch_xml_builtin): Move outside HAVE_LIBEXPAT. (xml_builtin_xfer_partial): New function. * xml-support.h (xml_builtin_xfer_partial): New prototype. * NEWS: Update mention of iWMMXt support.
This commit is contained in:
Daniel Jacobowitz
@ -26,6 +26,8 @@
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#include "regcache.h"
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#include "target.h"
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#include "linux-nat.h"
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#include "target-descriptions.h"
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#include "xml-support.h"
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#include "arm-tdep.h"
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#include "arm-linux-tdep.h"
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@ -45,6 +47,14 @@
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#define PTRACE_GET_THREAD_AREA 22
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#endif
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#ifndef PTRACE_GETWMMXREGS
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#define PTRACE_GETWMMXREGS 18
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#define PTRACE_SETWMMXREGS 19
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#endif
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/* A flag for whether the WMMX registers are available. */
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static int arm_linux_has_wmmx_registers;
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extern int arm_apcs_32;
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/* The following variables are used to determine the version of the
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@ -77,7 +87,7 @@ get_thread_id (ptid_t ptid)
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tid = PIDGET (ptid);
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return tid;
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}
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#define GET_THREAD_ID(PTID) get_thread_id ((PTID));
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#define GET_THREAD_ID(PTID) get_thread_id (PTID)
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/* Get the value of a particular register from the floating point
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state of the process and store it into regcache. */
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@ -363,6 +373,80 @@ store_regs (void)
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}
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}
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/* Fetch all WMMX registers of the process and store into
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regcache. */
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#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
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static void
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fetch_wmmx_regs (void)
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{
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char regbuf[IWMMXT_REGS_SIZE];
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int ret, regno, tid;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
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if (ret < 0)
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{
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warning (_("Unable to fetch WMMX registers."));
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return;
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}
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for (regno = 0; regno < 16; regno++)
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regcache_raw_supply (current_regcache, regno + ARM_WR0_REGNUM,
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®buf[regno * 8]);
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for (regno = 0; regno < 2; regno++)
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regcache_raw_supply (current_regcache, regno + ARM_WCSSF_REGNUM,
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®buf[16 * 8 + regno * 4]);
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for (regno = 0; regno < 4; regno++)
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regcache_raw_supply (current_regcache, regno + ARM_WCGR0_REGNUM,
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®buf[16 * 8 + 2 * 4 + regno * 4]);
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}
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static void
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store_wmmx_regs (void)
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{
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char regbuf[IWMMXT_REGS_SIZE];
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int ret, regno, tid;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
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if (ret < 0)
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{
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warning (_("Unable to fetch WMMX registers."));
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return;
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}
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for (regno = 0; regno < 16; regno++)
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if (register_cached (regno + ARM_WR0_REGNUM))
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regcache_raw_collect (current_regcache, regno + ARM_WR0_REGNUM,
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®buf[regno * 8]);
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for (regno = 0; regno < 2; regno++)
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if (register_cached (regno + ARM_WCSSF_REGNUM))
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regcache_raw_collect (current_regcache, regno + ARM_WCSSF_REGNUM,
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®buf[16 * 8 + regno * 4]);
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for (regno = 0; regno < 4; regno++)
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if (register_cached (regno + ARM_WCGR0_REGNUM))
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regcache_raw_collect (current_regcache, regno + ARM_WCGR0_REGNUM,
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®buf[16 * 8 + 2 * 4 + regno * 4]);
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ret = ptrace (PTRACE_SETWMMXREGS, tid, 0, regbuf);
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if (ret < 0)
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{
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warning (_("Unable to store WMMX registers."));
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return;
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}
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}
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/* Fetch registers from the child process. Fetch all registers if
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regno == -1, otherwise fetch all general registers or all floating
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point registers depending upon the value of regno. */
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@ -374,14 +458,18 @@ arm_linux_fetch_inferior_registers (int regno)
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{
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fetch_regs ();
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fetch_fpregs ();
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if (arm_linux_has_wmmx_registers)
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fetch_wmmx_regs ();
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}
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else
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{
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if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
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if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
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fetch_register (regno);
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if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
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else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
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fetch_fpregister (regno);
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else if (arm_linux_has_wmmx_registers
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&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
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fetch_wmmx_regs ();
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}
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}
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@ -396,14 +484,18 @@ arm_linux_store_inferior_registers (int regno)
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{
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store_regs ();
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store_fpregs ();
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if (arm_linux_has_wmmx_registers)
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store_wmmx_regs ();
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}
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else
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{
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if ((regno < ARM_F0_REGNUM) || (regno > ARM_FPS_REGNUM))
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if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
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store_register (regno);
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if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
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else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
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store_fpregister (regno);
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else if (arm_linux_has_wmmx_registers
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&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
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store_wmmx_regs ();
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}
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}
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@ -485,6 +577,44 @@ get_linux_version (unsigned int *vmajor,
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return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
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}
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static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
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const char *, gdb_byte *, const gdb_byte *,
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ULONGEST, LONGEST);
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static LONGEST
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arm_linux_xfer_partial (struct target_ops *ops,
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enum target_object object,
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const char *annex,
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gdb_byte *readbuf, const gdb_byte *writebuf,
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ULONGEST offset, LONGEST len)
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{
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if (object == TARGET_OBJECT_AVAILABLE_FEATURES)
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{
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if (annex != NULL && strcmp (annex, "target.xml") == 0)
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{
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int ret;
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char regbuf[IWMMXT_REGS_SIZE];
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ret = ptrace (PTRACE_GETWMMXREGS, GET_THREAD_ID (inferior_ptid),
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0, regbuf);
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if (ret < 0)
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arm_linux_has_wmmx_registers = 0;
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else
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arm_linux_has_wmmx_registers = 1;
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if (arm_linux_has_wmmx_registers)
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annex = "arm-with-iwmmxt.xml";
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else
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return -1;
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}
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return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
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}
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return super_xfer_partial (ops, object, annex, readbuf, writebuf,
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offset, len);
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}
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void _initialize_arm_linux_nat (void);
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void
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@ -501,6 +631,10 @@ _initialize_arm_linux_nat (void)
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t->to_fetch_registers = arm_linux_fetch_inferior_registers;
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t->to_store_registers = arm_linux_store_inferior_registers;
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/* Override the default to_xfer_partial. */
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super_xfer_partial = t->to_xfer_partial;
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t->to_xfer_partial = arm_linux_xfer_partial;
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/* Register the target. */
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linux_nat_add_target (t);
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}
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