Merge pull request riscv#5 from a4lg/fix-typos

Fix typos

cfi_backward.adoc

@@ -29,7 +29,7 @@ using the `mop.r` and `mop.rr` instructions defined by the Zimops extension.
 |   `(mop.r)`   |`31`    |      `20`    |`19` | `15`|`14` | `12` |`11` | `7`|`6` | `0`
 |  mnemonic  2+^|`1.00..0111..`      2+^|`rs1`   2+^|`func3`  2+^|`rd`   2+^|`opcode`
 |`sspush`    2+^|`100000011100`      2+^|`src`   2+^|`100`    2+^|`0`    2+^|`1110011`
-|`ssppop`    2+^|`100000011100`      2+^|`0`     2+^|`100`    2+^|`dst`  2+^|`1110011`
+|`sspop`     2+^|`100000011100`      2+^|`0`     2+^|`100`    2+^|`dst`  2+^|`1110011`
 |`ssprr`     2+^|`100000011101`      2+^|`0`     2+^|`100`    2+^|`dst`  2+^|`1110011`
 |            2+^|`12`                2+^|`5`     2+^|`3`      2+^|`5`    2+^|`7`      
 |===

cfi_csrs.adoc

@@ -8,7 +8,7 @@ This chapter specifies the CSR state of the Zisslpcfi extension.
 The `CFI` (bit 60) bit controls if Zisslpcfi extension is available for use in
 modes less privileged than M. 
 
-When `menvcfgCFI` bit is 0, then at privilege modes less privileged than M:
+When `menvcfg.CFI` bit is 0, then at privilege modes less privileged than M:
 
 * Attempts to access `ssp` CSR and `lplr` CSR raise an illegal instruction
   exception.
@@ -102,7 +102,7 @@ instruction exception.
 
 === Shadow stack pointer (`ssp`) 
 
-The `ssp` CSR is an unprivileged read-only (URW) CSR that reads and writes `XLEN`
+The `ssp` CSR is an unprivileged read-write (URW) CSR that reads and writes `XLEN`
 low order bits of the shadow stack pointer (`ssp`). There is no high CSR defined
 as the `ssp` is always as wide as the `XLEN` of the current privilege level.