38 lines
1.6 KiB
Diff
38 lines
1.6 KiB
Diff
2005-11-11 Gwenole Beauchesne <gbeauchesne@mandriva.com>
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* Globaaly save %ebx, %esi, %edi on entry to generated
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function. This avoids some register spills in synthetic opcodes.
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NOTE: this also easily fixes gcc4 compiled qemu-system-x86_64 on x86.
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--- qemu-0.7.2/cpu-exec.c.gcc4-opts 2005-09-04 19:11:31.000000000 +0200
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+++ qemu-0.7.2/cpu-exec.c 2005-11-11 17:40:47.000000000 +0100
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@@ -561,6 +561,15 @@ int cpu_exec(CPUState *env1)
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: /* no outputs */
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: "r" (gen_func)
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: "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14");
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+#elif defined(TARGET_X86_64) && defined(__i386__)
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+ asm volatile ("push %%ebx\n"
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+ "push %%esi\n"
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+ "push %%edi\n"
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+ "call *%0\n"
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+ "pop %%edi\n"
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+ "pop %%esi\n"
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+ "pop %%ebx\n"
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+ : : "r" (gen_func) : "ebx", "esi", "edi");
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#elif defined(TARGET_I386) && defined(USE_CODE_COPY)
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{
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if (!(tb->cflags & CF_CODE_COPY)) {
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--- qemu-0.7.2/Makefile.target.gcc4-opts 2005-11-11 16:26:33.000000000 +0100
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+++ qemu-0.7.2/Makefile.target 2005-11-11 17:59:56.000000000 +0100
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@@ -65,6 +65,10 @@ OP_CFLAGS+= -falign-functions=0 -fno-gcs
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else
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OP_CFLAGS+= -malign-functions=0
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endif
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+ifeq ($(TARGET_ARCH), x86_64)
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+# XXX globally save %ebx, %esi, %edi on entry to generated function
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+OP_CFLAGS+= -fcall-used-ebx -fcall-used-esi -fcall-used-edi
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+endif
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ifdef TARGET_GPROF
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USE_I386_LD=y
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