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author | Rahul Kumar <rahku@microsoft.com> | 2017-04-04 15:33:36 -0700 |
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committer | GitHub <noreply@github.com> | 2017-04-04 15:33:36 -0700 |
commit | 7f296fec9799d0a2d5ace44eb468ecf264cc026f (patch) | |
tree | cce5d6c0a798681a8582676f79ff02fda8295df3 /src | |
parent | 5619985da19d0f17a1a48558381a6d79bcc67f74 (diff) | |
parent | 4db5a72bc2209c6f56c7f335ae318f79d1fe2a4f (diff) | |
download | coreclr-7f296fec9799d0a2d5ace44eb468ecf264cc026f.tar.gz coreclr-7f296fec9799d0a2d5ace44eb468ecf264cc026f.tar.bz2 coreclr-7f296fec9799d0a2d5ace44eb468ecf264cc026f.zip |
Merge pull request #10190 from sdmaclea/PR-ARM64-BACKPORT-9500
[Arm64/Windows] Backport #9500 changes
Diffstat (limited to 'src')
-rw-r--r-- | src/vm/arm64/asmhelpers.asm | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/src/vm/arm64/asmhelpers.asm b/src/vm/arm64/asmhelpers.asm index d760765885..e8b16ded6a 100644 --- a/src/vm/arm64/asmhelpers.asm +++ b/src/vm/arm64/asmhelpers.asm @@ -159,6 +159,7 @@ RestoreRegMS 26, X26 RestoreRegMS 27, X27 RestoreRegMS 28, X28 + RestoreRegMS 29, X29 Done ; Its imperative that the return value of HelperMethodFrameRestoreState is zero @@ -991,16 +992,6 @@ UM2MThunk_WrapperHelper_RegArgumentsSetup ; This helper enables us to call into a funclet after restoring Fp register NESTED_ENTRY CallEHFunclet - - ; Using below prolog instead of PROLOG_SAVE_REG_PAIR fp,lr, #-16! - ; is intentional. Above statement would also emit instruction to save - ; sp in fp. If sp is saved in fp in prolog then it is not expected that fp can change in the body - ; of method. However, this method needs to be able to change fp before calling funclet. - ; This is required to access locals in funclet. - PROLOG_SAVE_REG_PAIR x19,x20, #-16! - PROLOG_SAVE_REG fp, #0 - PROLOG_SAVE_REG lr, #8 - ; On entry: ; ; X0 = throwable @@ -1008,17 +999,42 @@ UM2MThunk_WrapperHelper_RegArgumentsSetup ; X2 = address of X19 register in CONTEXT record; used to restore the non-volatile registers of CrawlFrame ; X3 = address of the location where the SP of funclet's caller (i.e. this helper) should be saved. ; + + ; Using below prolog instead of PROLOG_SAVE_REG_PAIR fp,lr, #-16! + ; is intentional. Above statement would also emit instruction to save + ; sp in fp. If sp is saved in fp in prolog then it is not expected that fp can change in the body + ; of method. However, this method needs to be able to change fp before calling funclet. + ; This is required to access locals in funclet. + PROLOG_SAVE_REG_PAIR_NO_FP fp,lr, #-96! + + ; Spill callee saved registers + PROLOG_SAVE_REG_PAIR x19, x20, 16 + PROLOG_SAVE_REG_PAIR x21, x22, 32 + PROLOG_SAVE_REG_PAIR x23, x24, 48 + PROLOG_SAVE_REG_PAIR x25, x26, 64 + PROLOG_SAVE_REG_PAIR x27, x28, 80 + ; Save the SP of this function. We cannot store SP directly. mov fp, sp str fp, [x3] + ldp x19, x20, [x2, #0] + ldp x21, x22, [x2, #16] + ldp x23, x24, [x2, #32] + ldp x25, x26, [x2, #48] + ldp x27, x28, [x2, #64] ldr fp, [x2, #80] ; offset of fp in CONTEXT relative to X19 ; Invoke the funclet blr x1 nop - EPILOG_RESTORE_REG_PAIR fp, lr, #16! + EPILOG_RESTORE_REG_PAIR x19, x20, 16 + EPILOG_RESTORE_REG_PAIR x21, x22, 32 + EPILOG_RESTORE_REG_PAIR x23, x24, 48 + EPILOG_RESTORE_REG_PAIR x25, x26, 64 + EPILOG_RESTORE_REG_PAIR x27, x28, 80 + EPILOG_RESTORE_REG_PAIR fp, lr, #96! EPILOG_RETURN NESTED_END CallEHFunclet |