diff options
| author | Tim Shen <timshen91@gmail.com> | 2017-05-10 16:28:21 +0000 |
|---|---|---|
| committer | Tim Shen <timshen91@gmail.com> | 2017-05-10 16:28:21 +0000 |
| commit | dedf34d8265822fc7db648a2a21245851dca2ccf (patch) | |
| tree | 09d66cc1e16f0784f9458db1958c74fba93eac22 /lib/xray | |
| parent | 1846d403b631a38e8e4429b5c31e2c37132e416e (diff) | |
[XRay] Fix XRay PPC return value bug.
Summary:
This bug is caused by the incorrect handling of return-value registers.
According to OpenPOWER 64-Bit ELF V2 ABI 2.2.5, up to 2 general-purpose
registers are going to be used for return values, and up to 8 floating
point registers or vector registers are going to be used for return
values.
Reviewers: dberris, echristo
Subscribers: nemanjai, llvm-commits
Differential Revision: https://reviews.llvm.org/D33027
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@302691 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/xray')
| -rw-r--r-- | lib/xray/xray_trampoline_powerpc64_asm.S | 90 |
1 files changed, 77 insertions, 13 deletions
diff --git a/lib/xray/xray_trampoline_powerpc64_asm.S b/lib/xray/xray_trampoline_powerpc64_asm.S index d43231ead..250e2e5be 100644 --- a/lib/xray/xray_trampoline_powerpc64_asm.S +++ b/lib/xray/xray_trampoline_powerpc64_asm.S @@ -145,27 +145,91 @@ __xray_FunctionEntry: .p2align 4 __xray_FunctionExit: std 0, 16(1) - ld 0, -8(1) # FuncId - stdu 1, -72(1) -# Spill r3, f1, and vsr34, the return value registers. + stdu 1, -256(1) +# Spill r3-r4, f1-f8, and vsr34-vsr41, which are return registers. +# If this appears to be slow, the caller needs to pass in number of generic, +# floating point, and vector parameters, so that we only spill those live ones. std 3, 32(1) - mr 3, 0 - addi 4, 1, 40 - stxsdx 1, 0, 4 + ld 3, 248(1) # FuncId + std 4, 40(1) addi 4, 1, 48 + stxsdx 1, 0, 4 + addi 4, 1, 56 + stxsdx 2, 0, 4 + addi 4, 1, 64 + stxsdx 3, 0, 4 + addi 4, 1, 72 + stxsdx 4, 0, 4 + addi 4, 1, 80 + stxsdx 5, 0, 4 + addi 4, 1, 88 + stxsdx 6, 0, 4 + addi 4, 1, 96 + stxsdx 7, 0, 4 + addi 4, 1, 104 + stxsdx 8, 0, 4 + addi 4, 1, 112 stxvd2x 34, 0, 4 + addi 4, 1, 128 + stxvd2x 35, 0, 4 + addi 4, 1, 144 + stxvd2x 36, 0, 4 + addi 4, 1, 160 + stxvd2x 37, 0, 4 + addi 4, 1, 176 + stxvd2x 38, 0, 4 + addi 4, 1, 192 + stxvd2x 39, 0, 4 + addi 4, 1, 208 + stxvd2x 40, 0, 4 + addi 4, 1, 224 + stxvd2x 41, 0, 4 + std 2, 240(1) mflr 0 - std 0, 64(1) + std 0, 248(1) + li 4, 1 bl _ZN6__xray23CallXRayPatchedFunctionEi13XRayEntryType nop - ld 0, 64(1) - mtlr 0 - ld 3, 32(1) - addi 4, 1, 40 - lxsdx 1, 0, 4 + addi 4, 1, 48 + lxsdx 1, 0, 4 + addi 4, 1, 56 + lxsdx 2, 0, 4 + addi 4, 1, 64 + lxsdx 3, 0, 4 + addi 4, 1, 72 + lxsdx 4, 0, 4 + addi 4, 1, 80 + lxsdx 5, 0, 4 + addi 4, 1, 88 + lxsdx 6, 0, 4 + addi 4, 1, 96 + lxsdx 7, 0, 4 + addi 4, 1, 104 + lxsdx 8, 0, 4 + addi 4, 1, 112 lxvd2x 34, 0, 4 - addi 1, 1, 72 + addi 4, 1, 128 + lxvd2x 35, 0, 4 + addi 4, 1, 144 + lxvd2x 36, 0, 4 + addi 4, 1, 160 + lxvd2x 37, 0, 4 + addi 4, 1, 176 + lxvd2x 38, 0, 4 + addi 4, 1, 192 + lxvd2x 39, 0, 4 + addi 4, 1, 208 + lxvd2x 40, 0, 4 + addi 4, 1, 224 + lxvd2x 41, 0, 4 + ld 0, 248(1) + mtlr 0 + ld 2, 240(1) + ld 3, 32(1) + ld 4, 40(1) + + addi 1, 1, 256 ld 0, 16(1) blr |