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HV: Remove SIB decode related code in decode_modrm
We will decode SIB in decode_sib after decode_modrm. So, there is no need to decode SIB related field in decode_modrm. This patch remove it. Signed-off-by: Kaige Fu <kaige.fu@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
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@ -1969,41 +1969,6 @@ decode_modrm(struct vie *vie, enum vm_cpu_mode cpu_mode)
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vie->reg |= (vie->rex_r << 3);
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/* SIB */
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if (vie->mod != VIE_MOD_DIRECT && vie->rm == VIE_RM_SIB) {
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goto done;
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}
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vie->base_register = gpr_map[vie->rm];
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switch (vie->mod) {
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case VIE_MOD_INDIRECT_DISP8:
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vie->disp_bytes = 1U;
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break;
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case VIE_MOD_INDIRECT_DISP32:
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vie->disp_bytes = 4U;
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break;
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case VIE_MOD_INDIRECT:
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if (vie->rm == VIE_RM_DISP32) {
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vie->disp_bytes = 4U;
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/*
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* Table 2-7. RIP-Relative Addressing
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*
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* In 64-bit mode mod=00 r/m=101 implies [rip] + disp32
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* whereas in compatibility mode it just implies disp32.
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*/
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if (cpu_mode == CPU_MODE_64BIT) {
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vie->base_register = CPU_REG_RIP;
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}
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else {
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vie->base_register = CPU_REG_LAST;
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}
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}
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break;
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}
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done:
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vie_advance(vie);
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return 0;
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