[all-commits] [llvm/llvm-project] 7a8b26: [libunwind][Hexagon] Save/restore full r0-r7 in ge...

[quic-k via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7a8b26271b273ea36c1d68c97f4c87b63de4a2bd
      https://github.com/llvm/llvm-project/commit/7a8b26271b273ea36c1d68c97f4c87b63de4a2bd
  Author: quic-k <kushpal at qti.qualcomm.com>
  Date:   2026-07-13 (Mon, 13 Jul 2026)

  Changed paths:
    M libunwind/src/UnwindRegistersRestore.S
    M libunwind/src/UnwindRegistersSave.S

  Log Message:
  -----------
  [libunwind][Hexagon] Save/restore full r0-r7 in getcontext/jumpto (#208753)

The Hexagon save and restore routines dropped GPRs, producing an
incomplete context.

UnwindRegistersSave.S (__unw_getcontext): save r0-r7 (stores began at
__r[8]), drop a dead "r1 = memw(r30)" before the PC store, and return
UNW_ESUCCESS instead of a stale non-zero value.

UnwindRegistersRestore.S (jumpto): restore the missing r2-r7 (r0/r1 and
r8-r31 were already handled), and fix the stale "pointer is in r2"
comment (it is r0).

Signed-off-by: Kushal Pal <kushpal at qti.qualcomm.com>



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