| /**************************************************************************** |
| * binfmt/binfmt_execsymtab.c |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <assert.h> |
| |
| #include <nuttx/irq.h> |
| #include <nuttx/symtab.h> |
| #include <nuttx/binfmt/symtab.h> |
| |
| #ifdef CONFIG_LIBC_EXECFUNCS |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| /* If CONFIG_LIBC_EXECFUNCS is defined in the configuration, then the |
| * following must also be defined: |
| */ |
| |
| #ifdef CONFIG_EXECFUNCS_HAVE_SYMTAB |
| /* Symbol table used by exec[l|v] */ |
| |
| # ifndef CONFIG_EXECFUNCS_SYMTAB_ARRAY |
| # error "CONFIG_EXECFUNCS_SYMTAB_ARRAY must be defined" |
| # endif |
| |
| /* Number of Symbols in the Table */ |
| |
| # ifndef CONFIG_EXECFUNCS_NSYMBOLS_VAR |
| # error "CONFIG_EXECFUNCS_NSYMBOLS_VAR must be defined" |
| # endif |
| #endif |
| |
| /**************************************************************************** |
| * Public Data |
| ****************************************************************************/ |
| |
| #ifdef CONFIG_EXECFUNCS_HAVE_SYMTAB |
| extern const struct symtab_s CONFIG_EXECFUNCS_SYMTAB_ARRAY[]; |
| extern int CONFIG_EXECFUNCS_NSYMBOLS_VAR; |
| #endif |
| |
| /**************************************************************************** |
| * Private Data |
| ****************************************************************************/ |
| |
| static FAR const struct symtab_s *g_exec_symtab; |
| static int g_exec_nsymbols; |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: exec_getsymtab |
| * |
| * Description: |
| * Get the current symbol table selection as an atomic operation. |
| * |
| * Input Parameters: |
| * symtab - The location to store the symbol table. |
| * nsymbols - The location to store the number of symbols in the symbol |
| * table. |
| * |
| * Returned Value: |
| * None |
| * |
| ****************************************************************************/ |
| |
| void exec_getsymtab(FAR const struct symtab_s **symtab, FAR int *nsymbols) |
| { |
| irqstate_t flags; |
| |
| DEBUGASSERT(symtab != NULL && nsymbols != NULL); |
| |
| /* Disable interrupts very briefly so that both the symbol table and its |
| * size are returned as a single atomic operation. |
| */ |
| |
| flags = enter_critical_section(); |
| |
| #ifdef CONFIG_EXECFUNCS_HAVE_SYMTAB |
| /* If a bring-up symbol table has been provided and if the exec symbol |
| * table has not yet been initialized, then use the provided start-up |
| * symbol table. |
| */ |
| |
| if (g_exec_symtab == NULL) |
| { |
| g_exec_symtab = CONFIG_EXECFUNCS_SYMTAB_ARRAY; |
| g_exec_nsymbols = CONFIG_EXECFUNCS_NSYMBOLS_VAR; |
| } |
| #endif |
| |
| /* Return the symbol table and its size */ |
| |
| *symtab = g_exec_symtab; |
| *nsymbols = g_exec_nsymbols; |
| leave_critical_section(flags); |
| } |
| |
| /**************************************************************************** |
| * Name: exec_setsymtab |
| * |
| * Description: |
| * Select a new symbol table selection as an atomic operation. |
| * |
| * Input Parameters: |
| * symtab - The new symbol table. |
| * nsymbols - The number of symbols in the symbol table. |
| * |
| * Returned Value: |
| * None |
| * |
| ****************************************************************************/ |
| |
| void exec_setsymtab(FAR const struct symtab_s *symtab, int nsymbols) |
| { |
| irqstate_t flags; |
| |
| DEBUGASSERT(symtab != NULL); |
| |
| /* Disable interrupts very briefly so that both the symbol table and its |
| * size are set as a single atomic operation. |
| */ |
| |
| flags = enter_critical_section(); |
| g_exec_symtab = symtab; |
| g_exec_nsymbols = nsymbols; |
| leave_critical_section(flags); |
| } |
| |
| #endif /* CONFIG_LIBC_EXECFUNCS */ |