From: Indu Bhagat <indu.bhagat@oracle.com>
To: binutils@sourceware.org
Cc: Indu Bhagat <indu.bhagat@oracle.com>
Subject: [COMMITTED, V2 5/6] gas: sframe: testsuite: add testcase for .cfi_negate_ra_state
Date: Fri, 16 Dec 2022 22:41:27 -0800 [thread overview]
Message-ID: <20221217064128.11326-6-indu.bhagat@oracle.com> (raw)
In-Reply-To: <20221217064128.11326-1-indu.bhagat@oracle.com>
[Changes in V2]
- Split out a subset of this commit deleting testcase to a previous
commit.
[End of changes in V2]
Add a new test to check that .cfi_negate_ra_state on aarch64 is handled
well (a non-empty SFrame section with valid SFrame FREs is generated).
ChangeLog:
* testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.d: New test.
* testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.s: Likewise.
* testsuite/gas/cfi-sframe/cfi-sframe.exp: Adjust the list
accordingly.
---
.../gas/cfi-sframe/cfi-sframe-aarch64-2.d | 20 +++++++++++++++++++
.../gas/cfi-sframe/cfi-sframe-aarch64-2.s | 18 +++++++++++++++++
gas/testsuite/gas/cfi-sframe/cfi-sframe.exp | 1 +
3 files changed, 39 insertions(+)
create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.d
create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.s
diff --git a/gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.d b/gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.d
new file mode 100644
index 00000000000..985f51fcda9
--- /dev/null
+++ b/gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.d
@@ -0,0 +1,20 @@
+#as: --gsframe
+#objdump: --sframe=.sframe
+#name: SFrame cfi_negate_ra_state test
+#...
+Contents of the SFrame section .sframe:
+
+ Header :
+
+ Version: SFRAME_VERSION_1
+ Flags: NONE
+ Num FDEs: 1
+ Num FREs: 2
+
+ Function Index :
+ func idx \[0\]: pc = 0x0, size = 8 bytes
+ STARTPC + CFA + FP + RA +
+#...
+ 0+0004 +sp\+16 +u +u\[s\] +
+
+#pass
diff --git a/gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.s b/gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.s
new file mode 100644
index 00000000000..8106c937b39
--- /dev/null
+++ b/gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.s
@@ -0,0 +1,18 @@
+## ARMv8.3 addded support a new security feature named Pointer Authentication. The
+## main idea behind this is to use the unused bits in the pointer values.
+## Each pointer is patched with a PAC before writing to memory, and is verified
+## before using it.
+## When the pointers are mangled, the unwinder needs to know so it can mask off
+## the PAC from the pointer value to recover the return address, and
+## conversely, skip doing so if the pointers are not mangled.
+##
+## .cfi_negate_ra_state CFI directive is used to convey this information.
+##
+## SFrame has support for this. This testcase ensures that the directive
+## is interpreted successfully.
+ .cfi_startproc
+ .long 0
+ .cfi_def_cfa_offset 16
+ .cfi_negate_ra_state
+ .long 0
+ .cfi_endproc
diff --git a/gas/testsuite/gas/cfi-sframe/cfi-sframe.exp b/gas/testsuite/gas/cfi-sframe/cfi-sframe.exp
index 8129e86ccce..f001fad0e8e 100644
--- a/gas/testsuite/gas/cfi-sframe/cfi-sframe.exp
+++ b/gas/testsuite/gas/cfi-sframe/cfi-sframe.exp
@@ -96,4 +96,5 @@ if { [istarget "x86_64-*-*"] && [gas_sframe_check] } then {
# aarch64 specific tests
if { [istarget "aarch64*-*-*"] && [gas_sframe_check] } then {
run_dump_test "cfi-sframe-aarch64-1"
+ run_dump_test "cfi-sframe-aarch64-2"
}
--
2.37.2
next prev parent reply other threads:[~2022-12-17 6:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-17 6:41 [COMMITTED, V2 0/6] SFrame: support for .cfi_negate_ra_state in aarch64 Indu Bhagat
2022-12-17 6:41 ` [COMMITTED, V2 1/6] sframe.h: add support for .cfi_negate_ra_state Indu Bhagat
2022-12-17 6:41 ` [COMMITTED, V2 2/6] gas: sframe: " Indu Bhagat
2022-12-17 6:41 ` [COMMITTED, V2 3/6] libsframe: provide new access API for mangled RA bit Indu Bhagat
2022-12-17 6:41 ` [COMMITTED, V2 4/6] objdump/readelf: sframe: emit marker for FREs with mangled RA Indu Bhagat
2022-12-17 6:41 ` Indu Bhagat [this message]
2022-12-17 6:41 ` [COMMITTED, V2 6/6] sframe: doc: update spec for the mangled-RA bit in FRE Indu Bhagat
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