…Pv6 addresses

The security fix we applied in CL709857 was overly broad. It applied
rules from RFC 2732, which disallowed IPv4-mapped IPv6 addresses, but
these were later allowed in RFC 3986, which is the canonical URI syntax
RFC.

Revert the portion of CL709857 which restricted IPv4-mapped addresses,
and update the related tests.

Updates #75815
Fixes #75832

Change-Id: I3192f2275ad5c386f5c15006a6716bdb5282919d
Reviewed-on: https://go-review.googlesource.com/c/go/+/710375
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Ethan Lee <[email protected]>
Auto-Submit: Roland Shoemaker <[email protected]>
(cherry picked from commit 9db7e30)
Reviewed-on: https://go-review.googlesource.com/c/go/+/712240
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
TryBot-Bypass: Dmitri Shuralyov <[email protected]>

When the passed byte slice has leading garbage, properly handle ignoring
it and continuing to parse the slice until we find a valid block (or
nothing).

Fixes #75952

Change-Id: I07e937d9c754fd71b028b99450b48f57b4464457
Reviewed-on: https://go-review.googlesource.com/c/go/+/712140
Reviewed-by: Damien Neil <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
(cherry picked from commit 0983090)
Reviewed-on: https://go-review.googlesource.com/c/go/+/712640
Reviewed-by: Dmitri Shuralyov <[email protected]>

…ape type

CL 641955 changes the Unified IR reader to not doing shapify when
reading reshaping expression, prevent losing of the original type.

This is an oversight, as the main problem isn't about shaping during the
reshaping process itself, but about the specific case of shaping a
pointer shape type. This bug occurs when instantiating a generic
function within another generic function with a pointer shape type as
type parameter, which will convert `*[]go.shape.T` to `*go.shape.uint8`,
resulting in the loss of the original expression's type.

This commit changes Unified IR reader to avoid pointer shaping for
`*[]go.shape.T`, ensures that the original type is preserved when
processing reshaping expressions.

Fixes #75480

Change-Id: Icede6b73247d0d367bb485619f2dafb60ad66806
Reviewed-on: https://go-review.googlesource.com/c/go/+/704095
Auto-Submit: Cuong Manh Le <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: David Chase <[email protected]>
Reviewed-by: Junyang Shao <[email protected]>
Reviewed-on: https://go-review.googlesource.com/c/go/+/706216
Reviewed-by: Ed Schouten <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

…pointers

We use one extra bit to placate systems which simulate amd64 binaries on
an arm64 host. Allocated arm64 addresses could be as high as 1<<48-1,
which would be invalid if we assumed 48-bit sign-extended addresses.

(Note that this does not help the other way around, simluating arm64
on amd64, but we don't have that problem at the moment.)

For #69255.
Fixes #75775.

Change-Id: Iace17a5d41a65e34abf201d03d8b0ff6f7bf1150
Reviewed-on: https://go-review.googlesource.com/c/go/+/700515
Reviewed-by: Keith Randall <[email protected]>
Auto-Submit: Keith Randall <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
(cherry picked from commit 2a7f1d4)
Reviewed-on: https://go-review.googlesource.com/c/go/+/712800
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: David Chase <[email protected]>

…ssembly implementation of xorBytes for mipsx"

This reverts commit 343e486.

Reason for revert: doesn't handle unaligned accesses correctly.

Update #75790

Change-Id: I1d6210eeca9336f2ce311e99944cb270565563aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/709795
Reviewed-by: Cherry Mui <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
(cherry picked from commit cb81270)
Reviewed-on: https://go-review.googlesource.com/c/go/+/709758
Reviewed-by: David Chase <[email protected]>

…ssembly implementation of xorBytes for mips64x"

This reverts commit 49d6777.

Reason for revert: doesn't handle unaligned accesses correctly

Fixes #75790

Change-Id: Ia272245a6a2a91b305d411207430bad660ee355b
Reviewed-on: https://go-review.googlesource.com/c/go/+/709757
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
(cherry picked from commit a1661e7)
Reviewed-on: https://go-review.googlesource.com/c/go/+/709798
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: David Chase <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>

…eAll on older Windows versions

The Windows implementation of RemoveAll supports deleting read-only
files only on file systems that supports POSIX semantics and on
newer Windows versions (Windows 10 RS5 and latter).

For all the other cases, the read-only bit was not clearer before
deleting read-only files, so they fail to delete.

Note that this case was supported prior to CL 75922, which landed on
Go 1.25.

For #75922
Fixes #75989

Change-Id: Id6e6477f42e1952d08318ca3e4ab7c1648969f66
Reviewed-on: https://go-review.googlesource.com/c/go/+/713480
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: David Chase <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
Auto-Submit: Damien Neil <[email protected]>
(cherry picked from commit b31dc77)
Reviewed-on: https://go-review.googlesource.com/c/go/+/715360
Auto-Submit: Michael Knyszek <[email protected]>

…nterface comparison

We can't do direct pointer comparisons if the type is not a
comparable type.

Fixes #76010

Change-Id: I1687acff21832d2c2e8f3b875e7b5ec125702ef3
Reviewed-on: https://go-review.googlesource.com/c/go/+/713840
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: David Chase <[email protected]>
Reviewed-by: Cuong Manh Le <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-on: https://go-review.googlesource.com/c/go/+/715720
Reviewed-by: Michael Knyszek <[email protected]>

When a block is missing the END line trailer, calculate the indexes of
the end and end trailer _before_ continuing the loop, making the
reslicing at the start of the loop work as expected.

Fixes #76029

Change-Id: If45c8cb473315623618f02cc7609f517a72d232d
Reviewed-on: https://go-review.googlesource.com/c/go/+/714200
Auto-Submit: Roland Shoemaker <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
(cherry picked from commit 839da71)
Reviewed-on: https://go-review.googlesource.com/c/go/+/714661
Reviewed-by: David Chase <[email protected]>

Change-Id: Iddc4427830693f0b518cb9766d6b1b552b97b79e
Reviewed-on: https://go-review.googlesource.com/c/go/+/718064
Reviewed-by: Michael Knyszek <[email protected]>
Reviewed-by: Michael Pratt <[email protected]>
TryBot-Bypass: Gopher Robot <[email protected]>
Auto-Submit: Gopher Robot <[email protected]>