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authorDavid Faust <david.faust@oracle.com>2020-06-25 20:34:29 +0200
committerJose E. Marchesi <jose.marchesi@oracle.com>2020-06-25 20:34:29 +0200
commitd73be6116811aeaedd1863c2597ede78be3cf4e5 (patch)
tree457e068b990ce46a75501faf06627297f583c59c /cpu
parent6d74da72dacdbbe2b87a6b931e0f7edc3d3463e3 (diff)
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cpu: fix offset16 type, update c-calls in bpf.cpu
Correct the type of the offset16 field to HI, and simplify memory accesses which use it. Also update c-calls in semantics for a few instructions. cpu/ChangeLog: 2020-06-25 David Faust <david.faust@oracle.com> * bpf.cpu (f-offset16): Change type from INT to HI. (dxli): Simplify memory access. (dxsi): Likewise. (define-endian-insn): Update c-call in semantics. (dlabs) Likewise. (dlind) Likewise.
Diffstat (limited to 'cpu')
-rw-r--r--cpu/ChangeLog9
-rw-r--r--cpu/bpf.cpu20
2 files changed, 15 insertions, 14 deletions
diff --git a/cpu/ChangeLog b/cpu/ChangeLog
index f2ac243..591ac01 100644
--- a/cpu/ChangeLog
+++ b/cpu/ChangeLog
@@ -1,3 +1,12 @@
+2020-06-25 David Faust <david.faust@oracle.com>
+
+ * bpf.cpu (f-offset16): Change type from INT to HI.
+ (dxli): Simplify memory access.
+ (dxsi): Likewise.
+ (define-endian-insn): Update c-call in semantics.
+ (dlabs) Likewise.
+ (dlind) Likewise.
+
2020-06-02 Jose E. Marchesi <jose.marchesi@oracle.com>
* bpf.cpu (define-bpf-isa): Set base-insn-bitsize to 64.
diff --git a/cpu/bpf.cpu b/cpu/bpf.cpu
index dcfb0ca..95290f6 100644
--- a/cpu/bpf.cpu
+++ b/cpu/bpf.cpu
@@ -273,7 +273,7 @@
;; difficulty: we put them in their own instruction word so the
;; byte-endianness will be properly applied.
-(dwf f-offset16 "eBPF offset field" (all-isas) 16 16 15 16 INT)
+(dwf f-offset16 "eBPF offset field" (all-isas) 16 16 15 16 HI)
(dwf f-imm32 "eBPF 32-bit immediate field" (all-isas) 32 32 31 32 INT)
;; For the disjoint 64-bit signed immediate, however, we need to use a
@@ -488,7 +488,7 @@
(+ (f-offset16 0) ((.sym f-src x-endian) 0) (.sym dst x-endian) endsize
OP_CLASS_ALU x-op-src OP_CODE_END)
(set (.sym dst x-endian)
- (c-call DI "bpfbf_end" (.sym dst x-endian) endsize))
+ (c-call DI (.str "bpfbf_end" x-suffix) (.sym dst x-endian) endsize))
()))
(define-endian-insn "le" OP_SRC_K le)
@@ -538,11 +538,7 @@
(mem DI
(add DI
(reg DI h-gpr 6) ;; Pointer to struct sk_buff
- (const DI 0))) ;; XXX offsetof
- ;; (struct sk_buff, data) XXX but the offset
- ;; depends on CONFIG_* options, so this should
- ;; be configured in the simulator and driven by
- ;; command-line options. Handle with a c-call.
+ (c-call "bpfbf_skb_data_offset")))
imm32)))
;; XXX this clobbers R1-R5
()))
@@ -572,11 +568,7 @@
(mem DI
(add DI
(reg DI h-gpr 6) ;; Pointer to struct sk_buff
- (const DI 0))) ;; XXX offsetof
- ;; (struct sk_buff, data) XXX but the offset
- ;; depends on CONFIG_* options, so this should
- ;; be configured in the simulator and driven by
- ;; command-line options. Handle with a c-call.
+ (c-call "bpfbf_skb_data_offset")))
(add DI
(.sym src x-endian)
imm32))))
@@ -612,7 +604,7 @@
OP_CLASS_LDX (.sym OP_SIZE_ x-size) OP_MODE_MEM)
(set x-mode
(.sym dst x-endian)
- (mem x-mode (add DI (.sym src x-endian) (ext DI (trunc HI offset16)))))
+ (mem x-mode (add DI (.sym src x-endian) offset16)))
()))
(define-pmacro (dxsi x-basename x-suffix x-size x-endian x-mode)
@@ -623,7 +615,7 @@
(+ (f-imm32 0) offset16 (.sym src x-endian) (.sym dst x-endian)
OP_CLASS_STX (.sym OP_SIZE_ x-size) OP_MODE_MEM)
(set x-mode
- (mem x-mode (add DI (.sym dst x-endian) (ext DI (trunc HI offset16))))
+ (mem x-mode (add DI (.sym dst x-endian) offset16))
(.sym src x-endian)) ;; XXX address is section-relative
()))