Gold uses two PT_LOAD programs: RX, RW
LLD is using three PT_LOAD programs: R, RX, RW
All non-static host bionic executables are linked with LLD, as it's
required in order to embed the linker. The dynamic linker is considered
a static executable for this definition.
When the linker had been built with Gold, we inserted the the RX&RW
loads in the middle of the executable's readonly load, splitting the R
load into two. When this happened, all of the linker's loads existed 1:1
in the final executable.
Now that the linker is built with LLD, we're inserting the loads into
the same place, but LLD merges the first part of the executable's R load
with the linker's R load, so there's not a 1:1 matching.
So just make sure that all of the linker's loads are contained within
the executable's loads (and with the appropriate flags).
Test: m blueprint_tools (runs new tests)
Test: build host bionic binaries
Change-Id: If7868d2ab8980d27ba5ab8994fefe0d6142f215a
In order to simplify the wrapper function, and stop using a linker
script, generate a set of flags to pass to LLD. Then run
host_bionic_inject on the linked binary in order to verify the
embedding, and give the wrapper function the address of the original
entry point (_start).
Bug: 31559095
Test: build host bionic with prebuilts/build-tools/build-prebuilts.sh
Change-Id: I53e326050e0f9caa562c6cf6f76c4d0337bb6faf
Dan Willemsen