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x86-64: Save RDX and RCX before we use them as function parameters.

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When the function call is indirect, these registers may be broken to load a function pointer.
This commit is contained in:
Shinichiro Hamaji 2009-04-02 01:40:00 +09:00 • committed by grischka
parent ebb874e216
commit 06fa15fb99
1 changed files with 2 additions and 2 deletions
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4
x86_64-gen.c
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@ -582,6 +582,8 @@ void gfunc_call(int nb_args)
vtop--; vtop--;
} }
save_regs(0); /* save used temporary registers */
/* Copy R10 and R11 into RDX and RCX, respectively */ /* Copy R10 and R11 into RDX and RCX, respectively */
if (nb_reg_args > 2) { if (nb_reg_args > 2) {
o(0xd2894c); /* mov %r10, %rdx */ o(0xd2894c); /* mov %r10, %rdx */
@ -590,8 +592,6 @@ void gfunc_call(int nb_args)
} }
} }
save_regs(0); /* save used temporary registers */
func_sym = vtop->type.ref; func_sym = vtop->type.ref;
func_call = FUNC_CALL(func_sym->r); func_call = FUNC_CALL(func_sym->r);
oad(0xb8, nb_sse_args < 8 ? nb_sse_args : 8); /* mov nb_sse_args, %eax */ oad(0xb8, nb_sse_args < 8 ? nb_sse_args : 8); /* mov nb_sse_args, %eax */