Author: Armin Rigo <[email protected]>
Branch:
Changeset: r72309:049f1e96b1de
Date: 2014-07-02 08:24 +0200
http://bitbucket.org/pypy/pypy/changeset/049f1e96b1de/
Log: Detect the x32 mode. (Note that there are compilation issues too
which may prevent a translate.py from ever reaching this point, but
well, if we fix these, then we'll hit this barrier rather than
compile a buggy executable.)
diff --git a/rpython/jit/backend/detect_cpu.py
b/rpython/jit/backend/detect_cpu.py
--- a/rpython/jit/backend/detect_cpu.py
+++ b/rpython/jit/backend/detect_cpu.py
@@ -73,11 +73,14 @@
result = MODEL_X86_64
else:
assert sys.maxint == 2**31-1
- from rpython.jit.backend.x86.detect_sse2 import detect_sse2
- if detect_sse2():
+ from rpython.jit.backend.x86 import detect_sse2
+ if detect_sse2.detect_sse2():
result = MODEL_X86
else:
result = MODEL_X86_NO_SSE2
+ if detect_sse2.detect_x32_mode():
+ raise ProcessorAutodetectError(
+ 'JITting in x32 mode is not implemented')
#
if result.startswith('arm'):
from rpython.jit.backend.arm.detect import detect_float
diff --git a/rpython/jit/backend/x86/detect_sse2.py
b/rpython/jit/backend/x86/detect_sse2.py
--- a/rpython/jit/backend/x86/detect_sse2.py
+++ b/rpython/jit/backend/x86/detect_sse2.py
@@ -1,3 +1,4 @@
+import sys
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rlib.rmmap import alloc, free
@@ -18,9 +19,26 @@
free(data, 4096)
return bool(code & (1<<25)) and bool(code & (1<<26))
+def detect_x32_mode():
+ data = alloc(4096)
+ pos = 0 # 32-bit 64-bit / x32
+ for c in ("\x48" # DEC EAX
+ "\xB8\xC8\x00\x00\x00"# MOV EAX, 200 MOV RAX,
0x40404040000000C8
+ "\x40\x40\x40\x40" # 4x INC EAX
+ "\xC3"): # RET RET
+ data[pos] = c
+ pos += 1
+ fnptr = rffi.cast(lltype.Ptr(lltype.FuncType([], lltype.Signed)), data)
+ code = fnptr()
+ free(data, 4096)
+ assert code in (200, 204, 0x40404040000000C8)
+ return code == 200
+
if __name__ == '__main__':
if detect_sse2():
print 'Processor supports sse2.'
else:
print 'Missing processor support for sse2.'
+ if detect_x32_mode():
+ print 'Process is running in "x32" mode.'
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