Don't hardcode CONTEXT size for a NOTE_INFO_THREAD win32pstatus note

Don't hardcode the size of the Win32 API thread CONTEXT type read from a
NOTE_INFO_THREAD win32pstatus note (since it's different on different
architectures).

bfd/ChangeLog:

2020-07-01  Jon Turney  <jon.turney@dronecode.org.uk>

	* elf.c (elfcore_grok_win32pstatus): Don't hardcode the size of
	the Win32 API thread CONTEXT type read from a NOTE_INFO_THREAD
	win32pstatus note.

2 files changed, 7 insertions, 1 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 84b2905..c99e654 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2020-07-01  Jon Turney  <jon.turney@dronecode.org.uk>
+
+	* elf.c (elfcore_grok_win32pstatus): Don't hardcode the size of
+	the Win32 API thread CONTEXT type read from a NOTE_INFO_THREAD
+	win32pstatus note.
+
 2020-07-11  Jon Turney  <jon.turney@dronecode.org.uk>
 
 	* elf.c (NOTE_INFO{_PROCESS,_THREAD,_MODULE}): Define.
diff --git a/bfd/elf.c b/bfd/elf.c
index 26a4d32..43a6cba 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -10178,7 +10178,7 @@ elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
 	return FALSE;
 
       /* sizeof (thread_info.thread_context) */
-      sect->size = 716;
+      sect->size = note->descsz - 12;
       /* offsetof (thread_info.thread_context) */
       sect->filepos = note->descpos + 12;
       sect->alignment_power = 2;