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| author | Rich Felker <dalias@aerifal.cx> | 2012-07-11 22:59:43 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-07-11 22:59:43 -0400 |
| commit | b58f738bcb5877c83aef49129b40827a1d5ae4c7 (patch) | |
| tree | cc439c14a5bf7b0c3d61920fd1d4a536c323a4cc | |
| parent | 2b3cc04a8d383a56a7031e98a7e4da36958d943a (diff) | |
| download | musl-b58f738bcb5877c83aef49129b40827a1d5ae4c7.tar.gz musl-b58f738bcb5877c83aef49129b40827a1d5ae4c7.tar.xz musl-b58f738bcb5877c83aef49129b40827a1d5ae4c7.zip | |
fix mips clone() on real linux kernel
the old code worked in qemu app-level emulation, but not on real kernels where the clone syscall does not copy the register values to the new thread. save arguments on the new thread stack instead.
| -rw-r--r-- | src/thread/mips/clone.s | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/thread/mips/clone.s b/src/thread/mips/clone.s index a7c2d907..fab90dc3 100644 --- a/src/thread/mips/clone.s +++ b/src/thread/mips/clone.s @@ -2,9 +2,10 @@ .global __clone .type __clone,@function __clone: - # Save function pointer and argument pointer - move $25, $4 - move $8, $7 + # Save function pointer and argument pointer on new thread stack + subu $5, $5, 16 + sw $4, 0($5) + sw $7, 4($5) # Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,tls,ctid) move $4, $6 lw $6, 16($sp) @@ -21,6 +22,8 @@ __clone: nop jr $ra nop -1: move $4, $8 +1: lw $25, 0($sp) + lw $4, 4($sp) jr $25 + addu $sp, $sp, 16 nop |