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Use new to_xfer_partial interface in ctf and tfile target

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This patch adjust both ctf and tfile target implementation of to_xfer_partial,
to return TARGET_XFER_E_UNAVAILABLE and set *XFERED_LEN if data is
unavailable.  Note that some code on xfer in exec.c can be shared, but
we can do it in a separate pass later.

gdb:

2014-02-23  Yao Qi  <yao@codesourcery.com>

	* exec.c (section_table_read_available_memory): New function.
	* exec.h (section_table_read_available_memory): Declare.
	* ctf.c (ctf_xfer_partial): Call
	section_table_read_available_memory.
	* tracefile-tfile.c (tfile_xfer_partial): Likewise.
This commit is contained in:
Yao Qi
2014-02-11 12:20:05 +08:00
parent 1ca49d376d
commit 1ee79381dd
5 changed files with 85 additions and 4 deletions
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8
gdb/exec.h
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@@ -91,6 +91,14 @@ extern enum target_xfer_status
struct target_section *,
const char *);
/* Read from mappable read-only sections of BFD executable files.
Similar to exec_read_partial_read_only, but return
TARGET_XFER_E_UNAVAILABLE if data is unavailable. */
extern enum target_xfer_status
section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset,
ULONGEST len, ULONGEST *xfered_len);
/* Set the loaded address of a section. */
extern void exec_set_section_address (const char *, int, CORE_ADDR);