This patchset entirely replaces the macro TARGET_TB_PCREL with
a field in TranslationBlock.cflags called CF_PCREL, and is a
first step towards removing target-specific assumptions from
non-target/ directories.
The grand goal is to allow for heterogeneous QEMU binaries
consisting of multiple frontends.
RFC: https://lists.nongnu.org/archive/html/qemu-devel/2022-12/msg04518.html
Changes in v2:
* Setting of CF_PCREL (previously patch 3) was split in two and moved
up front (to patch 2 and 3);
* Replacing of TARGET_TB_PCREL (previously patch 2) was split into
four patches (patches [4,7]), one for each affected submodule;
* Removal of TARGET_TB_PCREL (previously patch 3) was moved into
separate patches, one for each submodule (patches [8,10]);
* Patch 11 was introduced in response to feedback, and removes
CF_PCREL checks in functions in tb-jmp-cache.h, these functions were
always called in a context where CF_PCREL was already being checked.
These tb-jmp-cache.h functions were then removed in favour of manual
inlining;
* Patches [12,26] replaces calls to tb_pc() with a member access
tb->pc, the motivation being that tb_pc() was (almost) always called
in a context where CF_PCREL was already being checked;
* Finally patch 27 removes tb_pc() which is no longer used.
Changes in v3:
* Added reviewed-bys on remaining patches.