#include "regcache.h"
#include "linux-nat.h"
#include "mips-linux-tdep.h"
+#include "target-descriptions.h"
+#include "xml-support.h"
#include "gdb_proc_service.h"
#include "gregset.h"
+#include <sgidefs.h>
#include <sys/ptrace.h>
#ifndef PTRACE_GET_THREAD_AREA
regaddr = FPC_CSR;
else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
regaddr = store? (CORE_ADDR) -1 : FPC_EIR;
+ else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
+ regaddr = 0;
else
regaddr = (CORE_ADDR) -1;
regaddr = MIPS64_FPC_CSR;
else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
regaddr = store? (CORE_ADDR) -1 : MIPS64_FPC_EIR;
+ else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
+ regaddr = 0;
else
regaddr = (CORE_ADDR) -1;
return mips_linux_register_addr (gdbarch, regno, store_p);
}
+static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
+ const char *, gdb_byte *, const gdb_byte *,
+ ULONGEST, LONGEST);
+
+static LONGEST
+mips_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)
+ {
+ /* Report that target registers are a size we know for sure
+ that we can get from ptrace. */
+ if (_MIPS_SIM == _ABIO32)
+ annex = "mips-linux.xml";
+ else
+ annex = "mips64-linux.xml";
+ }
+
+ return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
+ }
+
+ return super_xfer_partial (ops, object, annex, readbuf, writebuf,
+ offset, len);
+}
+
void _initialize_mips_linux_nat (void);
void
t->to_fetch_registers = mips64_linux_fetch_registers;
t->to_store_registers = mips64_linux_store_registers;
+ /* Override the default to_xfer_partial. */
+ super_xfer_partial = t->to_xfer_partial;
+ t->to_xfer_partial = mips_linux_xfer_partial;
+
linux_nat_add_target (t);
}
#include "solib-svr4.h"
#include "solist.h"
#include "symtab.h"
+#include "target-descriptions.h"
#include "mips-linux-tdep.h"
static struct target_so_ops mips_svr4_so_ops;
memset (zerobuf, 0, MAX_REGISTER_SIZE);
- for (regi = EF_REG0; regi <= EF_REG31; regi++)
+ for (regi = EF_REG0 + 1; regi <= EF_REG31; regi++)
supply_32bit_reg (regcache, regi - EF_REG0, regp + regi);
+ if (mips_linux_restart_reg_p (current_gdbarch))
+ supply_32bit_reg (regcache, MIPS_RESTART_REGNUM, regp + EF_REG0);
+
supply_32bit_reg (regcache, mips_regnum (current_gdbarch)->lo,
regp + EF_LO);
supply_32bit_reg (regcache, mips_regnum (current_gdbarch)->hi,
regp + EF_CP0_CAUSE);
/* Fill inaccessible registers with zero. */
+ regcache_raw_supply (regcache, MIPS_ZERO_REGNUM, zerobuf);
regcache_raw_supply (regcache, MIPS_UNUSED_REGNUM, zerobuf);
for (regi = MIPS_FIRST_EMBED_REGNUM;
- regi < MIPS_LAST_EMBED_REGNUM;
+ regi <= MIPS_LAST_EMBED_REGNUM;
regi++)
regcache_raw_supply (regcache, regi, zerobuf);
}
if (regno == -1)
{
memset (regp, 0, sizeof (mips_elf_gregset_t));
- for (regi = 0; regi < 32; regi++)
+ for (regi = 1; regi < 32; regi++)
mips_fill_gregset (regcache, gregsetp, regi);
mips_fill_gregset (regcache, gregsetp,
mips_regnum (current_gdbarch)->lo);
mips_fill_gregset (regcache, gregsetp, MIPS_PS_REGNUM);
mips_fill_gregset (regcache, gregsetp,
mips_regnum (current_gdbarch)->cause);
+ mips_fill_gregset (regcache, gregsetp, MIPS_RESTART_REGNUM);
return;
}
- if (regno < 32)
+ if (regno > 0 && regno < 32)
{
dst = regp + regno + EF_REG0;
regcache_raw_collect (regcache, regno, dst);
regaddr = EF_CP0_STATUS;
else if (regno == mips_regnum (current_gdbarch)->cause)
regaddr = EF_CP0_CAUSE;
+ else if (mips_linux_restart_reg_p (current_gdbarch)
+ && regno == MIPS_RESTART_REGNUM)
+ regaddr = EF_REG0;
else
regaddr = -1;
memset (zerobuf, 0, MAX_REGISTER_SIZE);
- for (regi = MIPS64_EF_REG0; regi <= MIPS64_EF_REG31; regi++)
+ for (regi = MIPS64_EF_REG0 + 1; regi <= MIPS64_EF_REG31; regi++)
supply_64bit_reg (regcache, regi - MIPS64_EF_REG0,
(const gdb_byte *)(regp + regi));
+ if (mips_linux_restart_reg_p (current_gdbarch))
+ supply_64bit_reg (regcache, MIPS_RESTART_REGNUM,
+ (const gdb_byte *)(regp + MIPS64_EF_REG0));
+
supply_64bit_reg (regcache, mips_regnum (current_gdbarch)->lo,
(const gdb_byte *) (regp + MIPS64_EF_LO));
supply_64bit_reg (regcache, mips_regnum (current_gdbarch)->hi,
(const gdb_byte *) (regp + MIPS64_EF_CP0_CAUSE));
/* Fill inaccessible registers with zero. */
+ regcache_raw_supply (regcache, MIPS_ZERO_REGNUM, zerobuf);
regcache_raw_supply (regcache, MIPS_UNUSED_REGNUM, zerobuf);
for (regi = MIPS_FIRST_EMBED_REGNUM;
- regi < MIPS_LAST_EMBED_REGNUM;
+ regi <= MIPS_LAST_EMBED_REGNUM;
regi++)
regcache_raw_supply (regcache, regi, zerobuf);
}
if (regno == -1)
{
memset (regp, 0, sizeof (mips64_elf_gregset_t));
- for (regi = 0; regi < 32; regi++)
+ for (regi = 1; regi < 32; regi++)
mips64_fill_gregset (regcache, gregsetp, regi);
mips64_fill_gregset (regcache, gregsetp,
mips_regnum (current_gdbarch)->lo);
mips64_fill_gregset (regcache, gregsetp, MIPS_PS_REGNUM);
mips64_fill_gregset (regcache, gregsetp,
mips_regnum (current_gdbarch)->cause);
+ mips64_fill_gregset (regcache, gregsetp, MIPS_RESTART_REGNUM);
return;
}
- if (regno < 32)
+ if (regno > 0 && regno < 32)
regaddr = regno + MIPS64_EF_REG0;
else if (regno == mips_regnum (current_gdbarch)->lo)
regaddr = MIPS64_EF_LO;
regaddr = MIPS64_EF_CP0_STATUS;
else if (regno == mips_regnum (current_gdbarch)->cause)
regaddr = MIPS64_EF_CP0_CAUSE;
+ else if (mips_linux_restart_reg_p (current_gdbarch)
+ && regno == MIPS_RESTART_REGNUM)
+ regaddr = MIPS64_EF_REG0;
else
regaddr = -1;
else
regs_base = sigcontext_base;
-#if 0
- trad_frame_set_reg_addr (this_cache, ORIG_ZERO_REGNUM
- + gdbarch_num_regs (current_gdbarch),
- regs_base + SIGCONTEXT_REGS);
-#endif
+ if (mips_linux_restart_reg_p (current_gdbarch))
+ trad_frame_set_reg_addr (this_cache,
+ (MIPS_RESTART_REGNUM
+ + gdbarch_num_regs (current_gdbarch)),
+ regs_base + SIGCONTEXT_REGS);
for (ireg = 1; ireg < 32; ireg++)
trad_frame_set_reg_addr (this_cache,
else
sigcontext_base += N64_SIGFRAME_SIGCONTEXT_OFFSET;
-#if 0
- trad_frame_set_reg_addr (this_cache,
- ORIG_ZERO_REGNUM
- + gdbarch_num_regs (current_gdbarch),
- sigcontext_base + N64_SIGCONTEXT_REGS);
-#endif
+ if (mips_linux_restart_reg_p (current_gdbarch))
+ trad_frame_set_reg_addr (this_cache,
+ (MIPS_RESTART_REGNUM
+ + gdbarch_num_regs (current_gdbarch)),
+ sigcontext_base + N64_SIGCONTEXT_REGS);
for (ireg = 1; ireg < 32; ireg++)
trad_frame_set_reg_addr (this_cache,
func));
}
+static void
+mips_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
+{
+ write_register_pid (PC_REGNUM, pc, ptid);
+
+ /* Clear the syscall restart flag. */
+ if (mips_linux_restart_reg_p (current_gdbarch))
+ write_register_pid (MIPS_RESTART_REGNUM, 0, ptid);
+}
+
+/* Return 1 if MIPS_RESTART_REGNUM is usable. */
+
+int
+mips_linux_restart_reg_p (struct gdbarch *gdbarch)
+{
+ /* If we do not have a target description with registers, then
+ MIPS_RESTART_REGNUM will not be included in the register set. */
+ if (!tdesc_has_registers (gdbarch_target_desc (gdbarch)))
+ return 0;
+
+ /* If we do, then MIPS_RESTART_REGNUM is safe to check; it will
+ either be GPR-sized or missing. */
+ return register_size (gdbarch, MIPS_RESTART_REGNUM) > 0;
+}
/* Initialize one of the GNU/Linux OS ABIs. */
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum mips_abi abi = mips_abi (gdbarch);
+ struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info;
switch (abi)
{
= mips_linux_in_dynsym_resolve_code;
}
set_solib_ops (gdbarch, &mips_svr4_so_ops);
+
+ set_gdbarch_write_pc (gdbarch, mips_linux_write_pc);
+
+ if (tdesc_data)
+ {
+ const struct tdesc_feature *feature;
+
+ /* If we have target-described registers, then we can safely
+ reserve a number for MIPS_RESTART_REGNUM (whether it is
+ described or not). */
+ gdb_assert (gdbarch_num_regs (gdbarch) <= MIPS_RESTART_REGNUM);
+ set_gdbarch_num_regs (gdbarch, MIPS_RESTART_REGNUM + 1);
+
+ /* If it's present, then assign it to the reserved number. */
+ feature = tdesc_find_feature (info.target_desc,
+ "org.gnu.gdb.mips.linux");
+ if (feature != NULL)
+ tdesc_numbered_register (feature, tdesc_data, MIPS_RESTART_REGNUM,
+ "restart");
+ }
}
void
projects / binutils-gdb.git / commitdiff