55 lines
1.5 KiB
Diff
55 lines
1.5 KiB
Diff
Tell the compiler about 'edi' register changes
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From: Christian Prochaska <christian.prochaska@genode-labs.com>
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Syscall binding functions which use '__L4_INDIRECT_CALL' need to tell the
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compiler that the 'edi' register gets modified. Since 'edi' is an input
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operand and input operands may not get added to the clobber list, this
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patch defines 'edi' also as an output operand instead.
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---
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user/include/l4/ia32/syscalls.h | 10 +++++++---
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1 file changed, 7 insertions(+), 3 deletions(-)
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diff --git a/user/include/l4/ia32/syscalls.h b/user/include/l4/ia32/syscalls.h
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index a1d6caa..1088d63 100644
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--- a/user/include/l4/ia32/syscalls.h
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+++ b/user/include/l4/ia32/syscalls.h
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@@ -295,6 +295,7 @@ L4_INLINE L4_MsgTag_t L4_Ipc (L4_ThreadId_t to,
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L4_Word_t * utcb = __L4_X86_Utcb ();
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#if defined(__pic__)
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+ L4_Word_t dummy;
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__L4_Indirect_t in;
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in.edi = (L4_Word_t)utcb;
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in.sys_call = __L4_Ipc;
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@@ -311,8 +312,9 @@ L4_INLINE L4_MsgTag_t L4_Ipc (L4_ThreadId_t to,
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"=S" (mr0),
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"=a" (result),
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"=d" (mr1),
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- "=c" (mr2)
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-
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+ "=c" (mr2),
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+ "=D" (dummy)
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+
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: /* inputs */
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"S" (utcb[0]),
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"a" (to.raw),
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@@ -370,6 +372,7 @@ L4_INLINE L4_MsgTag_t L4_Lipc (L4_ThreadId_t to,
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#if defined(__pic__)
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+ L4_Word_t dummy;
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__L4_Indirect_t in;
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in.edi = (L4_Word_t)utcb;
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in.sys_call = __L4_Lipc;
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@@ -386,7 +389,8 @@ L4_INLINE L4_MsgTag_t L4_Lipc (L4_ThreadId_t to,
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"=S" (mr0),
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"=a" (result),
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"=d" (mr1),
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- "=c" (mr2)
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+ "=c" (mr2),
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+ "=D" (dummy)
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: /* inputs */
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"S" (utcb[0]),
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