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libunwind: backport llvm/llvm-project#152942

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https://github.com/llvm/llvm-project/pull/152942
This commit is contained in:
Alex Rønne Petersen 2025-10-14 11:56:02 +02:00
parent b34a13da38
commit c8b34bc8a3
1 changed files with 5 additions and 2 deletions
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7
lib/libunwind/src/UnwindRegistersRestore.S vendored
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@ -1044,9 +1044,10 @@ DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
lw $27, (4 * 27)($4) lw $27, (4 * 27)($4)
lw $28, (4 * 28)($4) lw $28, (4 * 28)($4)
lw $29, (4 * 29)($4) lw $29, (4 * 29)($4)
lw $30, (4 * 30)($4)
// load new pc into ra // load new pc into ra
lw $31, (4 * 32)($4) lw $31, (4 * 32)($4)
// MIPS 1 has load delay slot. Ensure lw $31 and jr are separated by an instruction.
lw $30, (4 * 30)($4)
// jump to ra, load a0 in the delay slot // jump to ra, load a0 in the delay slot
jr $31 jr $31
lw $4, (4 * 4)($4) lw $4, (4 * 4)($4)
@ -1082,11 +1083,13 @@ DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
ld $2, (8 * 2)($4) ld $2, (8 * 2)($4)
ld $3, (8 * 3)($4) ld $3, (8 * 3)($4)
// skip a0 for now // skip a0 for now
.irp i,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30 .irp i,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29
ld $\i, (8 * \i)($4) ld $\i, (8 * \i)($4)
.endr .endr
// load new pc into ra // load new pc into ra
ld $31, (8 * 32)($4) ld $31, (8 * 32)($4)
// MIPS 1 has load delay slot. Ensure lw $31 and jr are separated by an instruction.
ld $30, (8 * 30)($4)
// jump to ra, load a0 in the delay slot // jump to ra, load a0 in the delay slot
jr $31 jr $31
ld $4, (8 * 4)($4) ld $4, (8 * 4)($4)