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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 /src/thread/mips | |
| 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.
Diffstat (limited to 'src/thread/mips')
| -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 |