diff options
Diffstat (limited to 'deps/v8/src/arm/frames-arm.h')
| -rw-r--r-- | deps/v8/src/arm/frames-arm.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/deps/v8/src/arm/frames-arm.h b/deps/v8/src/arm/frames-arm.h index 5847a6a2a0..00c20efa8c 100644 --- a/deps/v8/src/arm/frames-arm.h +++ b/deps/v8/src/arm/frames-arm.h @@ -74,6 +74,18 @@ static const RegList kCalleeSaved = static const int kNumCalleeSaved = 7 + kR9Available; +// Number of registers for which space is reserved in safepoints. Must be a +// multiple of 8. +// TODO(regis): Only 8 registers may actually be sufficient. Revisit. +static const int kNumSafepointRegisters = 16; + +// Define the list of registers actually saved at safepoints. +// Note that the number of saved registers may be smaller than the reserved +// space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters. +static const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved; +static const int kNumSafepointSavedRegisters = + kNumJSCallerSaved + kNumCalleeSaved; + // ---------------------------------------------------- @@ -99,7 +111,9 @@ class ExitFrameConstants : public AllStatic { static const int kCodeOffset = -1 * kPointerSize; static const int kSPOffset = -1 * kPointerSize; - static const int kSavedRegistersOffset = 0 * kPointerSize; + // TODO(regis): Use a patched sp value on the stack instead. + // A marker of 0 indicates that double registers are saved. + static const int kMarkerOffset = -2 * kPointerSize; // The caller fields are below the frame pointer on the stack. static const int kCallerFPOffset = +0 * kPointerSize; |