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Add new target_read_raw_memory function, and consolidate comments.

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Tested on x86_64 Fedora 17.

gdb/
2013-12-02  Pedro Alves  <palves@redhat.com>

	* dcache.c (dcache_read_line): Use target_read_raw_memory.
	* target.c (target_read_raw_memory): New function.
	(target_read_stack, target_write_memory, target_write_raw_memory):
	Update comment.
	(target_read_code): Add comment.
	* target.h (target_read_raw_memory): Declare.
This commit is contained in:
Pedro Alves
2013-12-02 10:12:24 +00:00
parent 840207d8ee
commit aee4bf8505
4 changed files with 41 additions and 16 deletions
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34
gdb/target.c
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@@ -1791,16 +1791,30 @@ target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
return TARGET_XFER_E_IO;
}
/* Like target_read_memory, but specify explicitly that this is a read
from the target's raw memory. That is, this read bypasses the
dcache, breakpoint shadowing, etc. */
int
target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
/* See comment in target_read_memory about why the request starts at
current_target.beneath. */
if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
myaddr, memaddr, len) == len)
return 0;
else
return TARGET_XFER_E_IO;
}
/* Like target_read_memory, but specify explicitly that this is a read from
the target's stack. This may trigger different cache behavior. */
int
target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
/* Dispatch to the topmost target, not the flattened current_target.
Memory accesses check target->to_has_(all_)memory, and the
flattened target doesn't inherit those. */
/* See comment in target_read_memory about why the request starts at
current_target.beneath. */
if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
myaddr, memaddr, len) == len)
return 0;
@@ -1814,6 +1828,8 @@ target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
int
target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
/* See comment in target_read_memory about why the request starts at
current_target.beneath. */
if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
myaddr, memaddr, len) == len)
return 0;
@@ -1830,9 +1846,8 @@ target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
int
target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
{
/* Dispatch to the topmost target, not the flattened current_target.
Memory accesses check target->to_has_(all_)memory, and the
flattened target doesn't inherit those. */
/* See comment in target_read_memory about why the request starts at
current_target.beneath. */
if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
myaddr, memaddr, len) == len)
return 0;
@@ -1849,9 +1864,8 @@ target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
int
target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
{
/* Dispatch to the topmost target, not the flattened current_target.
Memory accesses check target->to_has_(all_)memory, and the
flattened target doesn't inherit those. */
/* See comment in target_read_memory about why the request starts at
current_target.beneath. */
if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
myaddr, memaddr, len) == len)
return 0;