From: Andreas Krebbel <krebbel@linux.ibm.com>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH 0/2] Preserve argument registers
Date: Mon, 14 Nov 2022 16:26:55 +0100 [thread overview]
Message-ID: <20221114152657.43632-1-krebbel@linux.ibm.com> (raw)
This adds support for preserving the content of parameter registers to
the stack and emit CFI for it. This useful for applications which want
to implement their own stack unwinding and need access to function
arguments.
A small common code patch was needed to prevent the CFI verification
in dwarf2cfi from complaining about the register saves without restores.
Andreas Krebbel (2):
New reg note REG_CFA_NORESTORE
IBM zSystems: Save argument registers to the stack -mpreserve-args
gcc/config/s390/s390.cc | 263 +++++++++++++-----
gcc/config/s390/s390.opt | 4 +
gcc/dwarf2cfi.cc | 15 +-
gcc/reg-notes.def | 5 +
.../gcc.target/s390/preserve-args-1.c | 17 ++
.../gcc.target/s390/preserve-args-2.c | 19 ++
6 files changed, 244 insertions(+), 79 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/s390/preserve-args-1.c
create mode 100644 gcc/testsuite/gcc.target/s390/preserve-args-2.c
--
2.38.1
next reply other threads:[~2022-11-14 15:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-14 15:26 Andreas Krebbel [this message]
2022-11-14 15:26 ` [PATCH 1/2] New reg note REG_CFA_NORESTORE Andreas Krebbel
2022-11-14 15:26 ` [PATCH 2/2] IBM zSystems: Save argument registers to the stack -mpreserve-args Andreas Krebbel
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