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Add safety check on number of integer and float arguments on x86_64.

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Paulo Cesar Pereira de Andrade 2010-08-23 18:59:39 -03:00 • committed by Paolo Bonzini
parent adc42ad2ad
commit 58043d717d
2 changed files with 16 additions and 0 deletions
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11
lightning/i386/core-64.h
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@ -38,6 +38,12 @@
#define JIT_CAN_16 0
#define JIT_REXTMP _R9D
/* Number or integer argument registers */
#define JIT_ARG_MAX 6
/* Number of float argument registers */
#define JIT_FP_ARG_MAX 8
#define JIT_R_NUM 3
#define JIT_R(i) ((i) == 0 ? _EAX : _R9D + (i))
#define JIT_V_NUM 3
@ -132,7 +138,12 @@ struct jit_local_state {
#define jit_callr(reg) CALLsr((reg))
/* Stack isn't used for arguments: */
#if !defined(_ASM_SAFETY)
#define jit_prepare_i(ni) (_jitl.argssize = (ni))
#else
#define jit_prepare_i(ni) ((ni) <= JIT_ARG_MAX ? _jitl.argssize = (ni) : JITFAIL("too many integer arguments"))
#endif
#define jit_pusharg_i(rs) (--_jitl.argssize, MOVQrr(rs, jit_arg_reg_order[_jitl.argssize]))
#define jit_finish(sub) (MOVQir((long) (sub), JIT_REXTMP), \

5
lightning/i386/fp-64.h
View file

@ -290,8 +290,13 @@ union jit_double_imm {
#define jit_ordr_d(d, s1, s2) (XORLrr ((d), (d)), UCOMISDrr ((s1), (s2)), SETNPr (jit_reg8((d))))
#define jit_unordr_d(d, s1, s2) (XORLrr ((d), (d)), UCOMISDrr ((s1), (s2)), SETPr (jit_reg8((d))))
#if !defined(_ASM_SAFETY)
#define jit_prepare_f(num) (_jitl.nextarg_putfp = _XMM0 + (num))
#define jit_prepare_d(num) (_jitl.nextarg_putfp = _XMM0 + (num))
#else
#define jit_prepare_f(num) ((num) <= JIT_FP_ARG_MAX ? (_jitl.nextarg_putfp = _XMM0 + (num)) : JITFAIL("too many float arguments"))
#define jit_prepare_d(num) ((num) <= JIT_FP_ARG_MAX ? (_jitl.nextarg_putfp = _XMM0 + (num)) : JITFAIL("too many float arguments"))
#endif
#define jit_arg_f() (_XMM0 + _jitl.nextarg_getfp++)
#define jit_arg_d() (_XMM0 + _jitl.nextarg_getfp++)