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| author | Andrew Waterman <waterman@cs.berkeley.edu> | 2015-09-14 12:44:45 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2015-09-14 12:46:14 -0700 |
| commit | 18efb61dc4fa2f20ce54cafcf12b12545751dd43 (patch) | |
| tree | 73afa5d418575d17e41199459c83ed838a25928b | |
| parent | cc3a93bf30d66a2e38fa744cbd9fb8c97dbf96f2 (diff) | |
| download | pk-18efb61dc4fa2f20ce54cafcf12b12545751dd43.zip pk-18efb61dc4fa2f20ce54cafcf12b12545751dd43.tar.gz pk-18efb61dc4fa2f20ce54cafcf12b12545751dd43.tar.bz2 | |
Zero-initialize x-registers for debuggability
| -rw-r--r-- | pk/mentry.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/pk/mentry.S b/pk/mentry.S index 560923e..f26e2dd 100644 --- a/pk/mentry.S +++ b/pk/mentry.S @@ -133,6 +133,39 @@ mentry: # Entry point for power-on reset (mtvec + 0x100) + # Zero registers for debuggability + li x1, 0 + li x2, 0 + li x3, 0 + li x4, 0 + li x5, 0 + li x6, 0 + li x7, 0 + li x8, 0 + li x9, 0 + li x10, 0 + li x11, 0 + li x12, 0 + li x13, 0 + li x14, 0 + li x15, 0 + li x16, 0 + li x17, 0 + li x18, 0 + li x19, 0 + li x20, 0 + li x21, 0 + li x22, 0 + li x23, 0 + li x24, 0 + li x25, 0 + li x26, 0 + li x27, 0 + li x28, 0 + li x29, 0 + li x30, 0 + li x31, 0 + # sp <- end of first full page after the end of the binary la sp, _end + 2*RISCV_PGSIZE - 1 li t0, -RISCV_PGSIZE |