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Diffstat (limited to 'contrib/gdb/gdb/remote-vxsparc.c')
| -rw-r--r-- | contrib/gdb/gdb/remote-vxsparc.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/remote-vxsparc.c b/contrib/gdb/gdb/remote-vxsparc.c new file mode 100644 index 0000000..118e517 --- /dev/null +++ b/contrib/gdb/gdb/remote-vxsparc.c @@ -0,0 +1,128 @@ +/* SPARC-specific portions of the RPC protocol for VxWorks. + + Contributed by Wind River Systems. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "regcache.h" + +#include "gdb_string.h" + +#include "sparc-tdep.h" + +#include "vx-share/ptrace.h" +#include "vx-share/regPacket.h" + +#define SPARC_R_G1 (SPARC_R_G0 + SPARC_GREG_SIZE) + +const struct sparc_gregset vxsparc_gregset = +{ + SPARC_R_PSR, /* %psr */ + SPARC_R_PC, /* %pc */ + SPARC_R_NPC, /* %npc */ + SPARC_R_Y, /* %y */ + SPARC_R_WIM, /* %wim */ + SPARC_R_TBR, /* %tbr */ + SPARC_R_G1, /* %g1 */ + SPARC_R_I0 /* %l0 */ +}; + +/* Flag set if target has an FPU. */ + +extern int target_has_fp; + +/* Generic register read/write routines in remote-vx.c. */ + +extern void net_read_registers (); +extern void net_write_registers (); + +/* Read a register or registers from the VxWorks target. REGNUM is + the register to read, or -1 for all; currently, it is ignored. + FIXME: Look at REGNUM to improve efficiency. */ + +void +vx_read_register (int regnum) +{ + struct regcache *regcache = current_regcache; + char gregs[SPARC_GREG_PLEN]; + char fpregs[SPARC_FPREG_PLEN]; + CORE_ADDR sp; + + /* Get the general-purpose registers. */ + net_read_registers (gregs, SPARC_GREG_PLEN, PTRACE_GETREGS); + sparc32_supply_gregset (&vxsparc_gregset, regcache, -1, gregs); + + /* If the target has floating-point registers, fetch them. + Otherwise, zero the floating-point register values in GDB's + register cache for good measure, even though we might not need + to. */ + if (target_has_fp) + net_read_registers (fpregs, SPARC_FPREG_PLEN, PTRACE_GETFPREGS); + else + memset (fpregs, 0, SPARC_FPREG_PLEN); + sparc32_supply_fpregset (regcache, -1, fpregs); +} + +/* Store a register or registers into the VxWorks target. REGNUM is + the register to store, or -1 for all; currently, it is ignored. + FIXME: Look at REGNUM to improve efficiency. */ + +void +vx_write_register (int regnum) +{ + struct regcache *regcache = current_regcache; + char gregs[SPARC_GREG_PLEN]; + char fpregs[SPARC_FPREG_PLEN]; + int gregs_p = 1; + int fpregs_p = 1; + CORE_ADDR sp; + + if (regnum != -1) + { + if ((SPARC_G0_REGNUM <= regnum && regnum <= SPARC_I7_REGNUM) + || (SPARC32_Y_REGNUM <= regnum && regnum <= SPARC32_NPC_REGNUM)) + fpregs_p = 0; + else + gregs_p = 0; + } + + /* Store the general-purpose registers. */ + if (gregs_p) + { + sparc32_collect_gregset (&vxsparc_gregset, regcache, -1, gregs); + net_write_registers (gregs, SPARC_GREG_PLEN, PTRACE_SETREGS); + + /* Deal with the stack regs. */ + if (regnum == -1 || regnum == SPARC_SP_REGNUM + || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM)) + { + ULONGEST sp; + + regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp); + sparc_collect_rwindow (regcache, sp, regnum); + } + } + + /* Store the floating-point registers if the target has them. */ + if (fpregs_p && target_has_fp) + { + sparc32_collect_fpregset (regcache, -1, fpregs); + net_write_registers (fpregs, SPARC_FPREG_PLEN, PTRACE_SETFPREGS); + } +} |
