arm_memory_read.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <ctype.h>
#include <unistd.h>
#include "dbg_msg.h"
#include "jt_arm.h"
#include "jt_flash.h"
#include "arm_gdbstub.h"
#include "arm_memory_mmap.h"
#include "arm_gdbstub_break.h"

Data Structures

• struct lookupCache
• struct lookupCacheContainer

Defines

• #define insertCachedWordAddr(address, value)   insertCachedAddr(&lookupCacheContainer.wordCache, address, value)
• #define insertCachedHalfwordAddr(address, value)   insertCachedAddr(&lookupCacheContainer.halfWordCache, address, value)
• #define findCachedWordAddr(address, value)   findCachedAddr(lookupCacheContainer.wordCache, address, value)
• #define findCachedHalfwordAddr(address, value)   findCachedAddr(lookupCacheContainer.halfWordCache, address, value)

Functions

• static void insertCachedAddr (struct lookupCache **cache, uint32_t address, uint32_t value)
• static int findCachedAddr (struct lookupCache *cache, uint32_t address, uint32_t *value)
• static void clearGivenLookupCache (struct lookupCache **cache)
• void gdb_read_memory_block (uint32_t addr, uint32_t word_len, uint32_t *buf)
• int * gdb_read_mem (int addr, int length)
• uint32_t gdbLookupThumbInstr (uint32_t addr)
• uint32_t gdbLookupArmInstr (uint32_t addr)
• void gdb_clearLookupCache (void)

Variables

• static struct lookupCacheContainer lookupCacheContainer = {NULL, NULL}

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Detailed Description

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Define Documentation

#define insertCachedWordAddr	(	address,
		value		)	insertCachedAddr(&lookupCacheContainer.wordCache, address, value)

Referenced by gdbLookupArmInstr().

#define insertCachedHalfwordAddr	(	address,
		value		)	insertCachedAddr(&lookupCacheContainer.halfWordCache, address, value)

Referenced by gdbLookupThumbInstr().

#define findCachedWordAddr	(	address,
		value		)	findCachedAddr(lookupCacheContainer.wordCache, address, value)

Referenced by gdbLookupArmInstr().

#define findCachedHalfwordAddr	(	address,
		value		)	findCachedAddr(lookupCacheContainer.halfWordCache, address, value)

Referenced by gdbLookupThumbInstr().

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Function Documentation

static void insertCachedAddr	(	struct lookupCache **	cache,
		uint32_t	address,
		uint32_t	value
	)			[static]

insert address and its value into a given lookup cache

Parameters:

	cache
	address
	value

Returns:

-

References lookupCache::address, lookupCache::next, and lookupCache::value.

static int findCachedAddr	(	struct lookupCache *	cache,
		uint32_t	address,
		uint32_t *	value
	)			[static]

search for address at given lookup cache

Parameters:

	cache
	address
	value	Pointer to hold data value at address

Return values:

	1	if found
	0	if not found

References lookupCache::address, lookupCache::next, and lookupCache::value.

static void clearGivenLookupCache

(

struct lookupCache **

cache

)

[static]

clear given lookup cache

Parameters:

cache

Returns:

-

References lookupCache::next.

Referenced by gdb_clearLookupCache().

void gdb_read_memory_block	(	uint32_t	addr,
		uint32_t	word_len,
		uint32_t *	buf
	)

Read out a length of memory at the target, starting a target address (addr).
This memory contents is copied to a buffer (buf).
If possible try to put a target READ program into our target workspace.
And transfer the Read-data via DCC.
If this is not possible read the memory via JTAG.

Parameters:

	addr	start word address of target memory
	word_len	number of 32-Bit words to read
	buf	pointer to destination buffer

Returns:

-

References memMap::baseAddr, DBG_LEVEL_GDB_ARM_INFO, getWorkSpace(), ICERT_REG_DCC_CONTROL, ICERT_REG_DCC_DATA, IF_DBG, jtag_arm_IceRT_RegRead(), jtag_arm_IceRT_RegRead_Once(), jtag_arm_IceRT_RegWrite(), jtag_arm_Mointor2DebugMode(), jtag_arm_PollDbgState(), jtag_arm_ReadWordMemory(), jtag_arm_RunProgram(), memMap::memBufferType, memMap::MemBufferType::Workspace::offset, useWorkspace(), memMap::MemBufferType::Workspace, and WORKSPACE_ALGO_READ.

Referenced by gdb_read_mem(), and verifyFlashCB_read_sector().

int* gdb_read_mem	(	int	addr,
		int	length
	)

Read out memory from target into local buffer if not already done.
Return a pointer to the local copy.
The local buffer itself is defined by our Memory Map.

Parameters:

	addr	start byte address of target memory
	length	in bytes

Return values:

	NULL	=> if no buffer exists (to store the cache data)
	Pointer	to local cache buffer

References memMap::baseAddr, bit_set, bit_test, memMap::MemBuffer::Byte, DBG_LEVEL_GDB_ARM_ERROR, DBG_LEVEL_GDB_ARM_WARN, dbgPrintf(), findMemMapOfAddr(), memMap::MemBufferType::Flash, gdb_read_memory_block(), memMap::length, memMap::memBuffer, memMap::memBufferType, MMAP_T_APPLICATION_FLASH, MMAP_T_CACHE, MMAP_T_FLASH, MMAP_T_IO, MMAP_T_RAM, MMAP_T_REREAD_ROM, MMAP_T_ROM, MMAP_T_SFA, MMAP_T_UNREAL, MMAP_T_UNUSED, MMAP_T_WORKSPACE, memMap::MemBufferType::Flash::numberOfSectors, memMap::MemBufferType::Ram, RAM_PAGE_SIZE, memMap::MemBufferType::Ram::readPageBitmap, SECTOR_FLAG_DIRTY, SECTOR_FLAG_ERASED, SECTOR_FLAG_HAS_DATA, SECTOR_FLAG_RW, SECTOR_INVALID, SECTOR_READ_ERASED_VALID, SECTOR_READ_VALID, SECTOR_WRITE, SECTOR_WRITE_DIRTY, SECTOR_WRITE_DIRTY_ERASED, memMap::MemBufferType::Flash::sectorList, sector::size, memMap::type, memMap::MemBufferType::Ram::writeByteBitmap, and memMap::MemBufferType::Flash::writeByteBitmap.

Referenced by armOsabiAllocTargetStringBuffer(), gdb_handle_exception(), and gdb_monitor_Rcmd().

uint32_t gdbLookupThumbInstr

(

uint32_t

addr

)

read THUMB instuction value at given address

Parameters:

addr

thumb addess

Returns:

thumb intruction code

References memMap::baseAddr, bit_test, breakpointList, DBG_LEVEL_GDB_ARM_INFO_LOW, DBG_LEVEL_GDB_ARM_WARN, dbgPrintf(), findCachedHalfwordAddr, findMemMapOfAddr(), breakpointContainer::firstSWBkptEntry, memMap::MemBufferType::Flash, memMap::MemBuffer::HalfWord, insertCachedHalfwordAddr, breakpointEntry::instr, jtag_arm_ReadHalfword(), memMap::memBuffer, memMap::memBufferType, MMAP_T_APPLICATION_FLASH, MMAP_T_FLASH, MMAP_T_RAM, MMAP_T_REREAD_ROM, MMAP_T_ROM, breakpointEntry::nextBkptEntry, memMap::MemBufferType::Flash::numberOfSectors, breakpointContainer::numberOfSWBkptEntrys, breakpointEntry::phys_addr, memMap::MemBufferType::Ram, RAM_PAGE_SIZE, memMap::MemBufferType::Ram::readPageBitmap, SECTOR_READ_ERASED_VALID, SECTOR_READ_VALID, SECTOR_WRITE_DIRTY, SECTOR_WRITE_DIRTY_ERASED, memMap::MemBufferType::Flash::sectorList, sector::size, memMap::type, and memMap::MemBufferType::Ram::writeByteBitmap.

Referenced by gdb_action_step(), and gdb_handle_exception().

uint32_t gdbLookupArmInstr

(

uint32_t

addr

)

read ARM instuction value at given address

Parameters:

addr

arm addess

Returns:

arm intruction code

References memMap::baseAddr, bit_test, breakpointList, DBG_LEVEL_GDB_ARM_INFO_LOW, DBG_LEVEL_GDB_ARM_WARN, dbgPrintf(), findCachedWordAddr, findMemMapOfAddr(), breakpointContainer::firstSWBkptEntry, memMap::MemBufferType::Flash, insertCachedWordAddr, breakpointEntry::instr, jtag_arm_ReadWord(), memMap::memBuffer, memMap::memBufferType, MMAP_T_APPLICATION_FLASH, MMAP_T_FLASH, MMAP_T_RAM, MMAP_T_REREAD_ROM, MMAP_T_ROM, breakpointEntry::nextBkptEntry, memMap::MemBufferType::Flash::numberOfSectors, breakpointContainer::numberOfSWBkptEntrys, breakpointEntry::phys_addr, memMap::MemBufferType::Ram, RAM_PAGE_SIZE, memMap::MemBufferType::Ram::readPageBitmap, SECTOR_READ_ERASED_VALID, SECTOR_READ_VALID, SECTOR_WRITE_DIRTY, SECTOR_WRITE_DIRTY_ERASED, memMap::MemBufferType::Flash::sectorList, sector::size, memMap::type, memMap::MemBuffer::Word, and memMap::MemBufferType::Ram::writeByteBitmap.

Referenced by armOsabiMultiThreading(), gdb_action_step(), and gdb_handle_exception().

void gdb_clearLookupCache

(

void

)

clear temporary caches that might be used by gdbLookupArmInstr and gdbLookupThumbInstr

Returns:

-

References clearGivenLookupCache(), lookupCacheContainer::halfWordCache, and lookupCacheContainer::wordCache.

Referenced by gdb_action_continue(), and gdb_action_step().

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Variable Documentation

struct lookupCacheContainer lookupCacheContainer = {NULL, NULL} [static]