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147 lines
4.9 KiB
147 lines
4.9 KiB
/**************************************************************************** |
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* libc/unistd/lib_execsymtab.c |
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* |
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* Copyright (C) 2013 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <assert.h> |
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#include <nuttx/arch.h> |
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#include <nuttx/binfmt/symtab.h> |
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#ifdef CONFIG_LIBC_EXECFUNCS |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/* If CONFIG_LIBC_EXECFUNCS is defined in the configuration, then the |
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* following must also be defined: |
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*/ |
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/* Symbol table used by exec[l|v] */ |
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#ifndef CONFIG_EXECFUNCS_SYMTAB |
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# error "CONFIG_EXECFUNCS_SYMTAB must be defined" |
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#endif |
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/* Number of Symbols in the Table */ |
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#ifndef CONFIG_EXECFUNCS_NSYMBOLS |
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# error "CONFIG_EXECFUNCS_NSYMBOLS must be defined" |
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#endif |
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/**************************************************************************** |
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* Public Variables |
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****************************************************************************/ |
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extern const struct symtab_s CONFIG_EXECFUNCS_SYMTAB; |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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static FAR const struct symtab_s *g_exec_symtab = &CONFIG_EXECFUNCS_SYMTAB; |
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static int g_exec_nsymbols = CONFIG_EXECFUNCS_NSYMBOLS; |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: exec_getsymtab |
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* |
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* Description: |
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* Get the current symbol table selection as an atomic operation. |
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* |
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* Input Parameters: |
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* symtab - The location to store the symbol table. |
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* nsymbols - The location to store the number of symbols in the symbol table. |
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* |
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* Returned Value: |
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* None |
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* |
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****************************************************************************/ |
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void exec_getsymtab(FAR const struct symtab_s **symtab, FAR int *nsymbols) |
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{ |
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irqstate_t flags; |
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DEBUGASSERT(symtab && nsymbols); |
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/* Disable interrupts very briefly so that both the symbol table and its |
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* size are returned as a single atomic operation. |
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*/ |
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flags = irqsave(); |
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*symtab = g_exec_symtab; |
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*nsymbols = g_exec_nsymbols; |
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irqrestore(flags); |
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} |
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/**************************************************************************** |
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* Name: exec_setsymtab |
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* |
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* Description: |
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* Select a new symbol table selection as an atomic operation. |
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* |
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* Input Parameters: |
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* symtab - The new symbol table. |
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* nsymbols - The number of symbols in the symbol table. |
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* |
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* Returned Value: |
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* None |
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* |
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****************************************************************************/ |
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void exec_setsymtab(FAR const struct symtab_s *symtab, int nsymbols) |
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{ |
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irqstate_t flags; |
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DEBUGASSERT(symtab); |
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/* Disable interrupts very briefly so that both the symbol table and its |
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* size are set as a single atomic operation. |
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*/ |
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flags = irqsave(); |
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g_exec_symtab = symtab; |
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g_exec_nsymbols = nsymbols; |
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irqrestore(flags); |
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} |
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#endif /* CONFIG_LIBC_EXECFUNCS */ |