74c98bc961
Support for position independent executables (PIE) on the native linux backend, the gdbserver backend on linux and the core backend. Also implemented in the windows native backend, but it can't be tested because go doesn't support PIE on windows yet.
40 lines
741 B
Go
40 lines
741 B
Go
package linutil
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import (
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"bytes"
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"encoding/binary"
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)
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const (
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_AT_NULL_AMD64 = 0
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_AT_ENTRY_AMD64 = 9
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)
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// EntryPointFromAuxv searches the elf auxiliary vector for the entry point
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// address.
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// For a description of the auxiliary vector (auxv) format see:
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// System V Application Binary Interface, AMD64 Architecture Processor
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// Supplement, section 3.4.3
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func EntryPointFromAuxvAMD64(auxv []byte) uint64 {
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rd := bytes.NewBuffer(auxv)
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for {
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var tag, val uint64
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err := binary.Read(rd, binary.LittleEndian, &tag)
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if err != nil {
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return 0
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}
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err = binary.Read(rd, binary.LittleEndian, &val)
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if err != nil {
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return 0
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}
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switch tag {
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case _AT_NULL_AMD64:
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return 0
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case _AT_ENTRY_AMD64:
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return val
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}
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}
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}
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