Hojun-Cho
2c33228b7e
Plan 9-style w-prefix on the per-arch tools, disambiguating from the
real Plan 9 6c/6a/6l in ref/plan9front/:
cmd/wwc/ → cmd/wcc/ libwwc.a → libwcc.a
cmd/6{c,a,l} → cmd/w6{c,a,l} binary names too
test/wwc/ → test/wcc/ 6 test files w/ w6 prefix
selfhost/cmd mirror in lockstep
bootstrap/amd64/{w6c,w6a,w6l} snapshot binaries (gitignored)
WW_6{C,A,L} → WW_W6{C,A,L} env-var overrides
Plan 9 source-tree refs ("Plan 9 6c shape", ref/plan9front/, etc.)
preserved. Hare-style driver, both C and ww sides:
ww test [path] discover *_test.ww in a directory module, run
each; single-file mode for `ww test foo.ww`
Module-by-name `ww build foo` resolves to foo.ww or foo/foo.ww
via search path (cwd : -I dirs : $WW_LIB)
Default-to-cwd `ww build` / `ww test` build the cwd module
Run pass-through `ww run path arg1 arg2` reaches the program
lib/os: getcwd (79) and getdents64 (217) syscalls power `.` resolution
and directory enumeration on the ww side.
Makefile: wwstage tool deps now include lib/os/os.ww (+ lib/strconv
for wwdump_ww) so lib/* edits force their rebuild instead of leaving
stale binaries — surfaced when test 995 first failed against a stale
w6c_ww built before the lib/os additions.
Test 993 byte-identical parity gate (C-side ww vs ww-side ww_ww on a
build corpus) stays green; all 19 tests pass.
108 lines
2.2 KiB
C
108 lines
2.2 KiB
C
/*
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* a.h — w6a-private header. Modelled on Plan 9 cmd/6a/a.h, trimmed
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* to the instruction subset that w6c emits.
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*
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* w6a is line-oriented and has no preprocessor: each non-blank, non-
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* label line is one instruction. We read the whole file into a list
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* of `Aprog`s, then encode and emit ELF64.
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*/
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#ifndef SIX_A_H
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#define SIX_A_H
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#include "6.out.h"
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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typedef int8_t i8;
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typedef int16_t i16;
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typedef int32_t i32;
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typedef int64_t i64;
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typedef uint8_t u8;
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typedef uint16_t u16;
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typedef uint32_t u32;
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typedef uint64_t u64;
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typedef struct Aoperand Aoperand;
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typedef struct Aprog Aprog;
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typedef struct Asym Asym;
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typedef struct Areloc Areloc;
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typedef struct Asm Asm;
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struct Aoperand {
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int type; /* D_NONE, D_AX..D_R15, D_CONST, D_INDIR, D_EXTERN, D_BRANCH */
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int reg; /* base register for D_INDIR */
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i64 offset; /* immediate or displacement */
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const char *sym;
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};
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struct Aprog {
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int as; /* opcode (A_*) */
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Aoperand from;
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Aoperand to;
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int line;
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const char *label; /* label preceding this prog, if any */
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Aprog *link;
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/* for A_DATA: raw payload bytes interned by the parser */
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u8 *bytes;
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u64 nbytes;
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};
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struct Asym {
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const char *name;
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int defined; /* 1 if we own its address */
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int is_text; /* if 1, address is in .text */
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int is_global; /* exported (TEXT) */
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u64 addr; /* offset within section if defined */
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int idx; /* ELF symtab index, filled at emit time */
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Asym *next;
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};
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struct Areloc {
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u64 off; /* offset within .text where relocation lands */
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int kind; /* R_X86_64_PLT32 (4), R_X86_64_PC32 (2) */
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Asym *sym;
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i64 addend;
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Areloc *next;
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};
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struct Asm {
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/* parser state */
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const char *file;
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const char *src;
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u64 srclen;
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u64 pos;
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int line;
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/* program list */
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Aprog *head, *tail;
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/* output text section */
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u8 *text;
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u64 textcap, textlen;
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/* symbols */
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Asym *syms;
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Areloc *relocs;
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int errs;
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};
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/* lex.c / parse.c */
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void a_init(Asm*, const char *file, const char *src, u64 len);
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int a_parse(Asm*);
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/* asm.c */
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int a_encode(Asm*);
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/* obj.c */
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int a_emit_elf(Asm*, FILE *out);
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/* helpers */
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Asym *a_intern(Asm*, const char *name);
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void a_emit_byte(Asm*, u8);
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void a_emit_u32(Asm*, u32);
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void a_addreloc(Asm*, u64 off, int kind, Asym *s, i64 add);
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#endif
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