diff options
Diffstat (limited to 'gdbserver/tdesc.c')
| -rw-r--r-- | gdbserver/tdesc.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/gdbserver/tdesc.c b/gdbserver/tdesc.c new file mode 100644 index 0000000..de25e7c --- /dev/null +++ b/gdbserver/tdesc.c @@ -0,0 +1,204 @@ +/* Copyright (C) 2012-2020 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 "tdesc.h" +#include "regdef.h" + +#ifndef IN_PROCESS_AGENT + +target_desc::~target_desc () +{ + xfree ((char *) arch); + xfree ((char *) osabi); +} + +bool target_desc::operator== (const target_desc &other) const +{ + if (reg_defs != other.reg_defs) + return false; + + /* Compare expedite_regs. */ + int i = 0; + for (; expedite_regs[i] != NULL; i++) + { + if (strcmp (expedite_regs[i], other.expedite_regs[i]) != 0) + return false; + } + if (other.expedite_regs[i] != NULL) + return false; + + return true; +} + +#endif + +void target_desc::accept (tdesc_element_visitor &v) const +{ +#ifndef IN_PROCESS_AGENT + v.visit_pre (this); + + for (const tdesc_feature_up &feature : features) + feature->accept (v); + + v.visit_post (this); +#endif +} + +void +init_target_desc (struct target_desc *tdesc, + const char **expedite_regs) +{ + int offset = 0; + + /* Go through all the features and populate reg_defs. */ + for (const tdesc_feature_up &feature : tdesc->features) + for (const tdesc_reg_up &treg : feature->registers) + { + int regnum = treg->target_regnum; + + /* Register number will increase (possibly with gaps) or be zero. */ + gdb_assert (regnum == 0 || regnum >= tdesc->reg_defs.size ()); + + if (regnum != 0) + tdesc->reg_defs.resize (regnum, reg (offset)); + + tdesc->reg_defs.emplace_back (treg->name.c_str (), offset, + treg->bitsize); + offset += treg->bitsize; + } + + tdesc->registers_size = offset / 8; + + /* Make sure PBUFSIZ is large enough to hold a full register + packet. */ + gdb_assert (2 * tdesc->registers_size + 32 <= PBUFSIZ); + +#ifndef IN_PROCESS_AGENT + tdesc->expedite_regs = expedite_regs; +#endif +} + +struct target_desc * +allocate_target_description (void) +{ + return new target_desc (); +} + +#ifndef IN_PROCESS_AGENT + +static const struct target_desc default_description {}; + +void +copy_target_description (struct target_desc *dest, + const struct target_desc *src) +{ + dest->reg_defs = src->reg_defs; + dest->expedite_regs = src->expedite_regs; + dest->registers_size = src->registers_size; + dest->xmltarget = src->xmltarget; +} + +const struct target_desc * +current_target_desc (void) +{ + if (current_thread == NULL) + return &default_description; + + return current_process ()->tdesc; +} + +/* See gdbsupport/tdesc.h. */ + +const char * +tdesc_architecture_name (const struct target_desc *target_desc) +{ + return target_desc->arch; +} + +/* See gdbsupport/tdesc.h. */ + +void +set_tdesc_architecture (struct target_desc *target_desc, + const char *name) +{ + target_desc->arch = xstrdup (name); +} + +/* See gdbsupport/tdesc.h. */ + +const char * +tdesc_osabi_name (const struct target_desc *target_desc) +{ + return target_desc->osabi; +} + +/* See gdbsupport/tdesc.h. */ + +void +set_tdesc_osabi (struct target_desc *target_desc, const char *name) +{ + target_desc->osabi = xstrdup (name); +} + +/* See gdbsupport/tdesc.h. */ + +const char * +tdesc_get_features_xml (const target_desc *tdesc) +{ + /* Either .xmltarget or .features is not NULL. */ + gdb_assert (tdesc->xmltarget != NULL + || (!tdesc->features.empty () + && tdesc->arch != NULL)); + + if (tdesc->xmltarget == NULL) + { + std::string buffer ("@"); + print_xml_feature v (&buffer); + tdesc->accept (v); + tdesc->xmltarget = xstrdup (buffer.c_str ()); + } + + return tdesc->xmltarget; +} +#endif + +/* See gdbsupport/tdesc.h. */ + +struct tdesc_feature * +tdesc_create_feature (struct target_desc *tdesc, const char *name) +{ + struct tdesc_feature *new_feature = new tdesc_feature (name); + tdesc->features.emplace_back (new_feature); + return new_feature; +} + +/* See gdbsupport/tdesc.h. */ + +bool +tdesc_contains_feature (const target_desc *tdesc, const std::string &feature) +{ + gdb_assert (tdesc != nullptr); + + for (const tdesc_feature_up &f : tdesc->features) + { + if (f->name == feature) + return true; + } + + return false; +} |