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[herd] Pac on instruction side#1795

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diaolo01 wants to merge 8 commits into
herd:masterfrom
diaolo01:pac+ifetch
Open

[herd] Pac on instruction side#1795
diaolo01 wants to merge 8 commits into
herd:masterfrom
diaolo01:pac+ifetch

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@diaolo01
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This PR builds on #1736 and adds support for the following PAC features:

  • Instruction‑side PAC checks, including threading PAC signed branch targets through BR/BLR to the next instruction and enforcing checks even when ifetch is disabled.
  • RETAA/RETAB support.
  • LDRAA/LDRAB support.

@diaolo01 diaolo01 changed the title [herd] Pac+ifetch [herd] Pac on instruction side May 7, 2026
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