Brandon Potter has uploaded a new patch set (#4) to the change originally
created by Giacomo Travaglini. (
https://gem5-review.googlesource.com/c/public/gem5/+/12884 )
Change subject: sim-se: Different HWCAP for ArmProcess32/64
......................................................................
sim-se: Different HWCAP for ArmProcess32/64
AArch32 and AArch64 have different HWCAP flags in Linux, but we are
currently using AArch32 HWCAP flags to initialize the aux vector of both
AArch32 and AArch64 binaries.
This patch also fixes a bug that was introduced by running in SE mode a
target binary compiled with glibc > 2.18. Using AArch32 flags
resulted on CPUID flag being set for AArch64. This incorrectly tells
libc that emulation of the midr_el1 is supported.
In FullSystem this might work, but since we are in Syscall Emulation
there is no OS behind emulating the mrs midr_el1 instruction.
By separating AArch32 flags from AArch64 flags we are turning off the
CPUID hwcap flag in SE mode.
Change-Id: I9f651957ba9d19dc2bc06606de070c6586f0f9fa
Signed-off-by: Giacomo Travaglini <[email protected]>
Reviewed-by: Andreas Sandberg <[email protected]>
---
M src/arch/arm/process.cc
M src/arch/arm/process.hh
2 files changed, 85 insertions(+), 37 deletions(-)
--
To view, visit https://gem5-review.googlesource.com/c/public/gem5/+/12884
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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: I9f651957ba9d19dc2bc06606de070c6586f0f9fa
Gerrit-Change-Number: 12884
Gerrit-PatchSet: 4
Gerrit-Owner: Giacomo Travaglini <[email protected]>
Gerrit-Reviewer: Andreas Sandberg <[email protected]>
Gerrit-Reviewer: Brandon Potter <[email protected]>
Gerrit-Reviewer: Ciro Santilli <[email protected]>
Gerrit-Reviewer: Giacomo Travaglini <[email protected]>
Gerrit-Reviewer: Jason Lowe-Power <[email protected]>
Gerrit-MessageType: newpatchset
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