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| author | John Baldwin <jhb@FreeBSD.org> | 2017-12-12 21:43:36 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2017-12-12 21:43:36 +0000 |
| commit | 375a366e031393e10095228a6679aa1c1e0408a3 (patch) | |
| tree | c78c4a184be4936b15602c2de0adb528fc50fd79 /src/UnwindRegistersRestore.S | |
| parent | 34ce9473f95bfd007c1ea03a1ee8c3c14cad9233 (diff) | |
| download | platform_external_libunwind_llvm-375a366e031393e10095228a6679aa1c1e0408a3.tar.gz platform_external_libunwind_llvm-375a366e031393e10095228a6679aa1c1e0408a3.tar.bz2 platform_external_libunwind_llvm-375a366e031393e10095228a6679aa1c1e0408a3.zip | |
[libunwind][MIPS]: Add support for unwinding in O32 and N64 processes.
This supports the soft-float ABI only and has been tested with both clang
and gcc on FreeBSD.
Reviewed By: sdardis, compnerd
Differential Revision: https://reviews.llvm.org/D38110
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@320528 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'src/UnwindRegistersRestore.S')
| -rw-r--r-- | src/UnwindRegistersRestore.S | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/UnwindRegistersRestore.S b/src/UnwindRegistersRestore.S index bb451f3..bd797f6 100644 --- a/src/UnwindRegistersRestore.S +++ b/src/UnwindRegistersRestore.S @@ -534,6 +534,118 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv) l.jr r9 l.nop +#elif defined(__mips__) && defined(_ABIO32) && defined(__mips_soft_float) + +// +// void libunwind::Registers_mips_o32::jumpto() +// +// On entry: +// thread state pointer is in a0 ($4) +// +DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv) + .set push + .set noat + .set noreorder + .set nomacro + // restore hi and lo + lw $8, (4 * 33)($4) + mthi $8 + lw $8, (4 * 34)($4) + mtlo $8 + // r0 is zero + lw $1, (4 * 1)($4) + lw $2, (4 * 2)($4) + lw $3, (4 * 3)($4) + // skip a0 for now + lw $5, (4 * 5)($4) + lw $6, (4 * 6)($4) + lw $7, (4 * 7)($4) + lw $8, (4 * 8)($4) + lw $9, (4 * 9)($4) + lw $10, (4 * 10)($4) + lw $11, (4 * 11)($4) + lw $12, (4 * 12)($4) + lw $13, (4 * 13)($4) + lw $14, (4 * 14)($4) + lw $15, (4 * 15)($4) + lw $16, (4 * 16)($4) + lw $17, (4 * 17)($4) + lw $18, (4 * 18)($4) + lw $19, (4 * 19)($4) + lw $20, (4 * 20)($4) + lw $21, (4 * 21)($4) + lw $22, (4 * 22)($4) + lw $23, (4 * 23)($4) + lw $24, (4 * 24)($4) + lw $25, (4 * 25)($4) + lw $26, (4 * 26)($4) + lw $27, (4 * 27)($4) + lw $28, (4 * 28)($4) + lw $29, (4 * 29)($4) + lw $30, (4 * 30)($4) + // load new pc into ra + lw $31, (4 * 32)($4) + // jump to ra, load a0 in the delay slot + jr $31 + lw $4, (4 * 4)($4) + .set pop + +#elif defined(__mips__) && defined(_ABI64) && defined(__mips_soft_float) + +// +// void libunwind::Registers_mips_n64::jumpto() +// +// On entry: +// thread state pointer is in a0 ($4) +// +DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind18Registers_mips_n646jumptoEv) + .set push + .set noat + .set noreorder + .set nomacro + // restore hi and lo + ld $8, (8 * 33)($4) + mthi $8 + ld $8, (8 * 34)($4) + mtlo $8 + // r0 is zero + ld $1, (8 * 1)($4) + ld $2, (8 * 2)($4) + ld $3, (8 * 3)($4) + // skip a0 for now + ld $5, (8 * 5)($4) + ld $6, (8 * 6)($4) + ld $7, (8 * 7)($4) + ld $8, (8 * 8)($4) + ld $9, (8 * 9)($4) + ld $10, (8 * 10)($4) + ld $11, (8 * 11)($4) + ld $12, (8 * 12)($4) + ld $13, (8 * 13)($4) + ld $14, (8 * 14)($4) + ld $15, (8 * 15)($4) + ld $16, (8 * 16)($4) + ld $17, (8 * 17)($4) + ld $18, (8 * 18)($4) + ld $19, (8 * 19)($4) + ld $20, (8 * 20)($4) + ld $21, (8 * 21)($4) + ld $22, (8 * 22)($4) + ld $23, (8 * 23)($4) + ld $24, (8 * 24)($4) + ld $25, (8 * 25)($4) + ld $26, (8 * 26)($4) + ld $27, (8 * 27)($4) + ld $28, (8 * 28)($4) + ld $29, (8 * 29)($4) + ld $30, (8 * 30)($4) + // load new pc into ra + ld $31, (8 * 32)($4) + // jump to ra, load a0 in the delay slot + jr $31 + ld $4, (8 * 4)($4) + .set pop + #endif #endif /* !defined(__USING_SJLJ_EXCEPTIONS__) */ |