* [binutils-gdb] bpf: use w regs in 32-bit non-fetch atomic pseudo-c
@ 2023-08-09 20:52 David Faust
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From: David Faust @ 2023-08-09 20:52 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6bf6f9245ac56a7ca6eb52a07fc2153b921c5fd6
commit 6bf6f9245ac56a7ca6eb52a07fc2153b921c5fd6
Author: David Faust <david.faust@oracle.com>
Date: Wed Aug 9 11:44:38 2023 -0700
bpf: use w regs in 32-bit non-fetch atomic pseudo-c
The 32-bit non-fetching atomic instructions treat the source register as
32-bits, which means in the pseudo-c syntax the "w" registers should be
used rather than the "r" registers.
opcodes/
* bpf-opc-c (bpf_opcodes): Use %sw for AAD32, AOR32, AAND32
and AXOR32 pseudo-c dialect asm templates.
gas/
* testsuite/gas/bpf/atomic-be-pseudoc.d: Use "w" for source reg
in non-fetching 32-bit atomic instructions.
* testsuite/gas/bpf/atomic-pseudoc.d: Likewise.
* testsuite/gas/bpf/atomic-pseudoc.s: Likewise.
Diff:
---
gas/testsuite/gas/bpf/atomic-be-pseudoc.d | 10 +++++-----
gas/testsuite/gas/bpf/atomic-pseudoc.d | 10 +++++-----
gas/testsuite/gas/bpf/atomic-pseudoc.s | 10 +++++-----
opcodes/bpf-opc.c | 8 ++++----
4 files changed, 19 insertions(+), 19 deletions(-)
diff --git a/gas/testsuite/gas/bpf/atomic-be-pseudoc.d b/gas/testsuite/gas/bpf/atomic-be-pseudoc.d
index 30c40fa2d12..f48684a96d5 100644
--- a/gas/testsuite/gas/bpf/atomic-be-pseudoc.d
+++ b/gas/testsuite/gas/bpf/atomic-be-pseudoc.d
@@ -9,15 +9,15 @@ Disassembly of section .text:
0+ <.text>:
0: db 12 1e ef 00 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\+=r2
- 8: c3 12 1e ef 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=r2
+ 8: c3 12 1e ef 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=w2
10: db 12 1e ef 00 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\+=r2
- 18: c3 12 1e ef 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=r2
+ 18: c3 12 1e ef 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=w2
20: db 12 1e ef 00 00 00 50 lock \*\(u64\*\)\(r1\+0x1eef\)\&=r2
- 28: c3 12 1e ef 00 00 00 50 lock \*\(u32\*\)\(r1\+0x1eef\)\&=r2
+ 28: c3 12 1e ef 00 00 00 50 lock \*\(u32\*\)\(r1\+0x1eef\)\&=w2
30: db 12 1e ef 00 00 00 40 lock \*\(u64\*\)\(r1\+0x1eef\)\|=r2
- 38: c3 12 1e ef 00 00 00 40 lock \*\(u32\*\)\(r1\+0x1eef\)\|=r2
+ 38: c3 12 1e ef 00 00 00 40 lock \*\(u32\*\)\(r1\+0x1eef\)\|=w2
40: db 12 1e ef 00 00 00 a0 lock \*\(u64\*\)\(r1\+0x1eef\)\^=r2
- 48: c3 12 1e ef 00 00 00 a0 lock \*\(u32\*\)\(r1\+0x1eef\)\^=r2
+ 48: c3 12 1e ef 00 00 00 a0 lock \*\(u32\*\)\(r1\+0x1eef\)\^=w2
50: db 12 1e ef 00 00 00 01 r2=atomic_fetch_add\(\(u64\*\)\(r1\+0x1eef\),r2\)
58: c3 12 1e ef 00 00 00 01 w2=atomic_fetch_add\(\(u32\*\)\(r1\+0x1eef\),w2\)
60: db 12 1e ef 00 00 00 51 r2=atomic_fetch_and\(\(u64\*\)\(r1\+0x1eef\),r2\)
diff --git a/gas/testsuite/gas/bpf/atomic-pseudoc.d b/gas/testsuite/gas/bpf/atomic-pseudoc.d
index 2b3739ee47e..257a2cde7dd 100644
--- a/gas/testsuite/gas/bpf/atomic-pseudoc.d
+++ b/gas/testsuite/gas/bpf/atomic-pseudoc.d
@@ -9,15 +9,15 @@ Disassembly of section .text:
0+ <.text>:
0: db 21 ef 1e 00 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\+=r2
- 8: c3 21 ef 1e 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=r2
+ 8: c3 21 ef 1e 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=w2
10: db 21 ef 1e 00 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\+=r2
- 18: c3 21 ef 1e 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=r2
+ 18: c3 21 ef 1e 00 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\+=w2
20: db 21 ef 1e 50 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\&=r2
- 28: c3 21 ef 1e 50 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\&=r2
+ 28: c3 21 ef 1e 50 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\&=w2
30: db 21 ef 1e 40 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\|=r2
- 38: c3 21 ef 1e 40 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\|=r2
+ 38: c3 21 ef 1e 40 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\|=w2
40: db 21 ef 1e a0 00 00 00 lock \*\(u64\*\)\(r1\+0x1eef\)\^=r2
- 48: c3 21 ef 1e a0 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\^=r2
+ 48: c3 21 ef 1e a0 00 00 00 lock \*\(u32\*\)\(r1\+0x1eef\)\^=w2
50: db 21 ef 1e 01 00 00 00 r2=atomic_fetch_add\(\(u64\*\)\(r1\+0x1eef\),r2\)
58: c3 21 ef 1e 01 00 00 00 w2=atomic_fetch_add\(\(u32\*\)\(r1\+0x1eef\),w2\)
60: db 21 ef 1e 51 00 00 00 r2=atomic_fetch_and\(\(u64\*\)\(r1\+0x1eef\),r2\)
diff --git a/gas/testsuite/gas/bpf/atomic-pseudoc.s b/gas/testsuite/gas/bpf/atomic-pseudoc.s
index 6994fd10367..928f5caf0db 100644
--- a/gas/testsuite/gas/bpf/atomic-pseudoc.s
+++ b/gas/testsuite/gas/bpf/atomic-pseudoc.s
@@ -1,15 +1,15 @@
# Test for eBPF atomic pseudo-C instructions.
.text
lock *(u64 *)(r1 + 0x1eef) += r2
- lock *(u32 *)(r1 + 0x1eef) += r2
+ lock *(u32 *)(r1 + 0x1eef) += w2
lock *(u64*)(r1+0x1eef)+=r2
- lock *(u32*)(r1+0x1eef)+=r2
+ lock *(u32*)(r1+0x1eef)+=w2
lock *(u64*)(r1+0x1eef)&=r2
- lock *(u32*)(r1+0x1eef)&=r2
+ lock *(u32*)(r1+0x1eef)&=w2
lock *(u64*)(r1+0x1eef)|=r2
- lock *(u32*)(r1+0x1eef)|=r2
+ lock *(u32*)(r1+0x1eef)|=w2
lock *(u64*)(r1+0x1eef)^=r2
- lock *(u32*)(r1+0x1eef)^=r2
+ lock *(u32*)(r1+0x1eef)^=w2
r2 = atomic_fetch_add((u64*)(r1+0x1eef),r2)
w2 = atomic_fetch_add((u32*)(r1+0x1eef),w2)
r2 = atomic_fetch_and((u64*)(r1+0x1eef),r2)
diff --git a/opcodes/bpf-opc.c b/opcodes/bpf-opc.c
index 3f42680c661..3d6dccbd005 100644
--- a/opcodes/bpf-opc.c
+++ b/opcodes/bpf-opc.c
@@ -384,13 +384,13 @@ const struct bpf_opcode bpf_opcodes[] =
BPF_V3, BPF_CODE|BPF_IMM32, BPF_CLASS_STX|BPF_SIZE_DW|BPF_MODE_ATOMIC|BPF_IMM32_AFXOR},
/* Atomic instructions (32-bit.) */
- {BPF_INSN_AADD32, "aadd32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) += %sr",
+ {BPF_INSN_AADD32, "aadd32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) += %sw",
BPF_V3, BPF_CODE|BPF_IMM32, BPF_CLASS_STX|BPF_SIZE_W|BPF_MODE_ATOMIC|BPF_IMM32_AADD},
- {BPF_INSN_AOR32, "aor32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) |= %sr",
+ {BPF_INSN_AOR32, "aor32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) |= %sw",
BPF_V3, BPF_CODE|BPF_IMM32, BPF_CLASS_STX|BPF_SIZE_W|BPF_MODE_ATOMIC|BPF_IMM32_AOR},
- {BPF_INSN_AAND32, "aand32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) &= %sr",
+ {BPF_INSN_AAND32, "aand32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) &= %sw",
BPF_V3, BPF_CODE|BPF_IMM32, BPF_CLASS_STX|BPF_SIZE_W|BPF_MODE_ATOMIC|BPF_IMM32_AAND},
- {BPF_INSN_AXOR32, "axor32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) ^= %sr",
+ {BPF_INSN_AXOR32, "axor32%W[ %dr %o16 ] , %sr", "lock%w* ( u32 * ) ( %dr %o16 ) ^= %sw",
BPF_V3, BPF_CODE|BPF_IMM32, BPF_CLASS_STX|BPF_SIZE_W|BPF_MODE_ATOMIC|BPF_IMM32_AXOR},
/* Atomic instructions with fetching (32-bit.) */
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