6a70d531bb
Delve represents registerized variables (fully or partially) using compositeMemory, implementing proc.(*compositeMemory).WriteMemory is necessary to make SetVariable and function calls work when Go will switch to using the register calling convention in 1.17. This commit also makes some refactoring by moving the code that converts between register numbers and register names out of pkg/proc into a different package.
103 lines
2.0 KiB
Go
103 lines
2.0 KiB
Go
package regnum
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import (
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"fmt"
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"strings"
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)
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// The mapping between hardware registers and DWARF registers is specified
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// in the System V ABI Intel386 Architecture Processor Supplement page 25,
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// table 2.14
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// https://www.uclibc.org/docs/psABI-i386.pdf
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const (
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I386_Eax = 0
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I386_Ecx = 1
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I386_Edx = 2
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I386_Ebx = 3
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I386_Esp = 4
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I386_Ebp = 5
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I386_Esi = 6
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I386_Edi = 7
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I386_Eip = 8
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I386_Eflags = 9
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I386_ST0 = 11 // ST(1) through ST(7) follow
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I386_XMM0 = 21 // XMM1 through XMM7 follow
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I386_Es = 40
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I386_Cs = 41
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I386_Ss = 42
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I386_Ds = 43
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I386_Fs = 44
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I386_Gs = 45
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)
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var i386DwarfToName = map[int]string{
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I386_Eax: "Eax",
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I386_Ecx: "Ecx",
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I386_Edx: "Edx",
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I386_Ebx: "Ebx",
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I386_Esp: "Esp",
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I386_Ebp: "Ebp",
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I386_Esi: "Esi",
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I386_Edi: "Edi",
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I386_Eip: "Eip",
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I386_Eflags: "Eflags",
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I386_ST0: "ST(0)",
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I386_ST0 + 1: "ST(1)",
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I386_ST0 + 2: "ST(2)",
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I386_ST0 + 3: "ST(3)",
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I386_ST0 + 4: "ST(4)",
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I386_ST0 + 5: "ST(5)",
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I386_ST0 + 6: "ST(6)",
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I386_ST0 + 7: "ST(7)",
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I386_XMM0: "XMM0",
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I386_XMM0 + 1: "XMM1",
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I386_XMM0 + 2: "XMM2",
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I386_XMM0 + 3: "XMM3",
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I386_XMM0 + 4: "XMM4",
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I386_XMM0 + 5: "XMM5",
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I386_XMM0 + 6: "XMM6",
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I386_XMM0 + 7: "XMM7",
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I386_Es: "Es",
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I386_Cs: "Cs",
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I386_Ss: "Ss",
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I386_Ds: "Ds",
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I386_Fs: "Fs",
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I386_Gs: "Gs",
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}
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var I386NameToDwarf = func() map[string]int {
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r := make(map[string]int)
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for regNum, regName := range i386DwarfToName {
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r[strings.ToLower(regName)] = regNum
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}
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r["eflags"] = 9
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r["st0"] = 11
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r["st1"] = 12
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r["st2"] = 13
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r["st3"] = 14
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r["st4"] = 15
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r["st5"] = 16
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r["st6"] = 17
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r["st7"] = 18
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return r
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}()
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func I386MaxRegNum() int {
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max := int(I386_Eip)
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for i := range i386DwarfToName {
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if i > max {
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max = i
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}
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}
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return max
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}
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func I386ToName(num int) string {
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name, ok := i386DwarfToName[num]
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if ok {
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return name
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}
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return fmt.Sprintf("unknown%d", num)
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}
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