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Diffstat (limited to 'gdbserver/lynx-ppc-low.cc')
| -rw-r--r-- | gdbserver/lynx-ppc-low.cc | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/gdbserver/lynx-ppc-low.cc b/gdbserver/lynx-ppc-low.cc new file mode 100644 index 0000000..f93fc1d --- /dev/null +++ b/gdbserver/lynx-ppc-low.cc @@ -0,0 +1,185 @@ +/* Copyright (C) 2009-2020 Free Software Foundation, Inc. + + 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 3 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, see <http://www.gnu.org/licenses/>. */ + +#include "server.h" +#include "lynx-low.h" +#include <limits.h> +#include <sys/ptrace.h> + +/* The following two typedefs are defined in a .h file which is not + in the standard include path (/sys/include/family/ppc/ucontext.h), + so we just duplicate them here. */ + +/* General register context */ +typedef struct usr_econtext_s +{ + uint32_t uec_iregs[32]; + uint32_t uec_inum; + uint32_t uec_srr0; + uint32_t uec_srr1; + uint32_t uec_lr; + uint32_t uec_ctr; + uint32_t uec_cr; + uint32_t uec_xer; + uint32_t uec_dar; + uint32_t uec_mq; + uint32_t uec_msr; + uint32_t uec_sregs[16]; + uint32_t uec_ss_count; + uint32_t uec_ss_addr1; + uint32_t uec_ss_addr2; + uint32_t uec_ss_code1; + uint32_t uec_ss_code2; +} usr_econtext_t; + +/* Floating point register context */ +typedef struct usr_fcontext_s +{ + uint64_t ufc_freg[32]; + uint32_t ufc_fpscr[2]; +} usr_fcontext_t; + +/* Index of for various registers inside the regcache. */ +#define R0_REGNUM 0 +#define F0_REGNUM 32 +#define PC_REGNUM 64 +#define MSR_REGNUM 65 +#define CR_REGNUM 66 +#define LR_REGNUM 67 +#define CTR_REGNUM 68 +#define XER_REGNUM 69 +#define FPSCR_REGNUM 70 + +/* Defined in auto-generated file powerpc-32.c. */ +extern void init_registers_powerpc_32 (void); +extern const struct target_desc *tdesc_powerpc_32; + +/* The fill_function for the general-purpose register set. */ + +static void +lynx_ppc_fill_gregset (struct regcache *regcache, char *buf) +{ + int i; + + /* r0 - r31 */ + for (i = 0; i < 32; i++) + collect_register (regcache, R0_REGNUM + i, + buf + offsetof (usr_econtext_t, uec_iregs[i])); + + /* The other registers provided in the GP register context. */ + collect_register (regcache, PC_REGNUM, + buf + offsetof (usr_econtext_t, uec_srr0)); + collect_register (regcache, MSR_REGNUM, + buf + offsetof (usr_econtext_t, uec_srr1)); + collect_register (regcache, CR_REGNUM, + buf + offsetof (usr_econtext_t, uec_cr)); + collect_register (regcache, LR_REGNUM, + buf + offsetof (usr_econtext_t, uec_lr)); + collect_register (regcache, CTR_REGNUM, + buf + offsetof (usr_econtext_t, uec_ctr)); + collect_register (regcache, XER_REGNUM, + buf + offsetof (usr_econtext_t, uec_xer)); +} + +/* The store_function for the general-purpose register set. */ + +static void +lynx_ppc_store_gregset (struct regcache *regcache, const char *buf) +{ + int i; + + /* r0 - r31 */ + for (i = 0; i < 32; i++) + supply_register (regcache, R0_REGNUM + i, + buf + offsetof (usr_econtext_t, uec_iregs[i])); + + /* The other registers provided in the GP register context. */ + supply_register (regcache, PC_REGNUM, + buf + offsetof (usr_econtext_t, uec_srr0)); + supply_register (regcache, MSR_REGNUM, + buf + offsetof (usr_econtext_t, uec_srr1)); + supply_register (regcache, CR_REGNUM, + buf + offsetof (usr_econtext_t, uec_cr)); + supply_register (regcache, LR_REGNUM, + buf + offsetof (usr_econtext_t, uec_lr)); + supply_register (regcache, CTR_REGNUM, + buf + offsetof (usr_econtext_t, uec_ctr)); + supply_register (regcache, XER_REGNUM, + buf + offsetof (usr_econtext_t, uec_xer)); +} + +/* The fill_function for the floating-point register set. */ + +static void +lynx_ppc_fill_fpregset (struct regcache *regcache, char *buf) +{ + int i; + + /* f0 - f31 */ + for (i = 0; i < 32; i++) + collect_register (regcache, F0_REGNUM + i, + buf + offsetof (usr_fcontext_t, ufc_freg[i])); + + /* fpscr */ + collect_register (regcache, FPSCR_REGNUM, + buf + offsetof (usr_fcontext_t, ufc_fpscr)); +} + +/* The store_function for the floating-point register set. */ + +static void +lynx_ppc_store_fpregset (struct regcache *regcache, const char *buf) +{ + int i; + + /* f0 - f31 */ + for (i = 0; i < 32; i++) + supply_register (regcache, F0_REGNUM + i, + buf + offsetof (usr_fcontext_t, ufc_freg[i])); + + /* fpscr */ + supply_register (regcache, FPSCR_REGNUM, + buf + offsetof (usr_fcontext_t, ufc_fpscr)); +} + +/* Implements the lynx_target_ops.arch_setup routine. */ + +static void +lynx_ppc_arch_setup (void) +{ + init_registers_powerpc_32 (); + lynx_tdesc = tdesc_powerpc_32; +} + +/* Description of all the powerpc-lynx register sets. */ + +struct lynx_regset_info lynx_target_regsets[] = { + /* General Purpose Registers. */ + {PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t), + lynx_ppc_fill_gregset, lynx_ppc_store_gregset}, + /* Floating Point Registers. */ + { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t), + lynx_ppc_fill_fpregset, lynx_ppc_store_fpregset }, + /* End of list marker. */ + {0, 0, -1, NULL, NULL } +}; + +/* The lynx_target_ops vector for powerpc-lynxos. */ + +struct lynx_target_ops the_low_target = { + lynx_ppc_arch_setup, +}; |