modulepackage
0.0.0-20201210093613-164ae1a95c11
Repository: https://github.com/debugger101/godbg.git
Documentation: pkg.go.dev
# README
godbg
Start a new project, the debugger on linux platform for go
开个新坑，go语言在linux下的调试器
export GO111MODULE=on
go build -o godbg main.go
./godbg debug ./test_file/t1.go
or you can `make install` and use `godbg` globally
display
This project is inspired by dlv
Reference：
# Functions
https://en.wikipedia.org/wiki/LEB128 result = 0; shift = 0; size = number of bits in signed integer; do{ byte = next byte in input; result |= (low order 7 bits of byte << shift); shift += 7; } while (high order bit of byte != 0);
/* sign bit of byte is second high order bit (0x40) */ if ((shift <size) && (sign bit of byte is set)) /* sign extend */ result |= (~0 << shift);.
https://en.wikipedia.org/wiki/LEB128 result = 0; shift = 0; while(true) { byte = next byte in input; result |= (low order 7 bits of byte) << shift; if (high order bit of byte == 0) break; shift += 7; }.
# Constants
+delta.
1-byte delta.
2-byte delta.
4-byte delta.
ULEB128 register, ULEB128 offset.
BLOCK.
ULEB128 offset.
SLEB128 offset.
ULEB128 register.
ULEB128 register, SLEB128 offset.
ULEB128 register, BLOCK.
https://golang.org/pkg/cmd/internal/dwarf/.
https://golang.org/pkg/cmd/internal/dwarf/.
operand,...
+register (ULEB128 offset).
ULEB128 register, ULEB128 offset.
ULEB128 register, SLEB128 offset.
ULEB128 register, ULEB128 register.
https://golang.org/pkg/cmd/internal/dwarf/.
+register.
ULEB128 register.
https://golang.org/pkg/cmd/internal/dwarf/.
ULEB128 register.
address.
ULEB128 register.
ULEB128, BLOCK.
ULEB128, ULEB128.
ULEB128, SLEB128.
0.
1 constant address (size target specific).
0.
2.
1 signed 2-byte constant.
1 ...
1 SLEB128 offset base register 0..31 = (DW_OP_breg0 + regnum).
2 ULEB128 register followed by SLEB128 offset.
0.
1 4- or 8-byte offset of DIE.
1 2-byte offset of DIE.
1 4-byte offset of DIE.
1 1-byte constant.
1 1-byte constant.
1 2-byte constant.
1 2-byte constant.
1 4-byte constant.
1 4-byte constant.
1 8-byte constant.
1 8-byte constant.
1 SLEB128 constant.
1 ULEB128 constant.
0.
1 1-byte size of data retrieved.
0.
0.
0.
0.
1 SLEB128 offset.
0.
0.
0.
This table is produced by go compiler and linker.
0.
0 ...
0 literals 0..31 = (DW_OP_lit0 + literal).
This table is produced by go compiler and linker.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
1 1-byte stack index.
1 ULEB128 size of piece addressed.
0.
1 ULEB128 addend.
0.
0 ..
0 reg 0..31 = (DW_OP_reg0 + regnum).
1 ULEB128 register.
0.
0.
0.
0.
1 signed 2-byte constant.
0.
0.
1 1-byte size of data retrieved.
0.
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Value is rule.Reg + rule.Offset.
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Value is stored at address rule.Reg + rule.Offset, but only if it's less than the current CFA, otherwise same value.
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# Variables
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# Structs
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http://dwarfstd.org/doc/Dwarf3.pdf.
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