函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\lib\insn-eval.c Create Date:2022-07-27 08:24:42
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：get_eff_addr_modrm() - Obtain referenced effective address via ModRM*@insn: Instruction

函数原型：static int get_eff_addr_modrm(struct insn *insn, struct pt_regs *regs, int *regoff, long *eff_addr)

返回类型：int

参数：

类型参数名称
struct insn *insn
struct pt_regs *regs
int *regoff
long *eff_addr
932  如果addr_bytes不等于8且addr_bytes不等于4则返回:负EINVAL
935  sn_get_modrm - collect ModRM byte, if any*@insn: &struct insn containing instruction* Populates @insn->modrm and updates @insn->next_byte to point past the* ModRM byte, if any. If necessary, first collects the preceding bytes* (prefixes and opcode(s))
937  如果非nbytes则返回:负EINVAL
940  如果X86_MODRM_MOD(value)大于2则返回:负EINVAL
943  regoff等于get_reg_offset(insn, regs, REG_TYPE_RM)
950  如果regoff恒等于负EDOM则
951  如果user_64bit_mode(regs)则tmp等于 Return frame for iretq 加length
953  否则tmp等于0
955  否则如果regoff小于0则
956  返回:负EINVAL
957  否则
958  tmp等于gs_get_register() - get register value from its offset*@regs: pt_regs from which register value is gotten.*@offset: offset number of the register.* regs_get_register returns the value of a register. The @offset is the
961  如果addr_bytes恒等于4则
962  addr32等于tmp按位与0xffffffff的值加value
964  eff_addr等于addr32按位与0xffffffff
965  否则
966  eff_addr等于tmp加value
969  返回:0
调用者
名称描述
get_addr_ref_32get_addr_ref_32() - Obtain a 32-bit linear address*@insn: Instruction with ModRM, SIB bytes and displacement*@regs: Register values as seen when entering kernel mode* This function is to be used with 32-bit address encodings to obtain the* linear memory
get_addr_ref_64