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ffi/target/release/build/mlua-sys-6a99a2ae50f12319/out/luajit-build/build/dynasm/dasm_arm.h  view on Meta::CPAN

/*
** DynASM ARM encoding engine.
** Copyright (C) 2005-2025 Mike Pall. All rights reserved.
** Released under the MIT license. See dynasm.lua for full copyright notice.
*/

#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>

#define DASM_ARCH		"arm"

#ifndef DASM_EXTERN
#define DASM_EXTERN(a,b,c,d)	0
#endif

/* Action definitions. */
enum {
  DASM_STOP, DASM_SECTION, DASM_ESC, DASM_REL_EXT,
  /* The following actions need a buffer position. */
  DASM_ALIGN, DASM_REL_LG, DASM_LABEL_LG,
  /* The following actions also have an argument. */
  DASM_REL_PC, DASM_LABEL_PC,
  DASM_IMM, DASM_IMM12, DASM_IMM16, DASM_IMML8, DASM_IMML12, DASM_IMMV8,
  DASM__MAX
};

/* Maximum number of section buffer positions for a single dasm_put() call. */
#define DASM_MAXSECPOS		25

/* DynASM encoder status codes. Action list offset or number are or'ed in. */
#define DASM_S_OK		0x00000000
#define DASM_S_NOMEM		0x01000000
#define DASM_S_PHASE		0x02000000
#define DASM_S_MATCH_SEC	0x03000000
#define DASM_S_RANGE_I		0x11000000
#define DASM_S_RANGE_SEC	0x12000000
#define DASM_S_RANGE_LG		0x13000000
#define DASM_S_RANGE_PC		0x14000000
#define DASM_S_RANGE_REL	0x15000000
#define DASM_S_UNDEF_LG		0x21000000
#define DASM_S_UNDEF_PC		0x22000000

/* Macros to convert positions (8 bit section + 24 bit index). */
#define DASM_POS2IDX(pos)	((pos)&0x00ffffff)
#define DASM_POS2BIAS(pos)	((pos)&0xff000000)
#define DASM_SEC2POS(sec)	((sec)<<24)
#define DASM_POS2SEC(pos)	((pos)>>24)
#define DASM_POS2PTR(D, pos)	(D->sections[DASM_POS2SEC(pos)].rbuf + (pos))

/* Action list type. */
typedef const unsigned int *dasm_ActList;

/* Per-section structure. */
typedef struct dasm_Section {
  int *rbuf;		/* Biased buffer pointer (negative section bias). */
  int *buf;		/* True buffer pointer. */
  size_t bsize;		/* Buffer size in bytes. */
  int pos;		/* Biased buffer position. */
  int epos;		/* End of biased buffer position - max single put. */
  int ofs;		/* Byte offset into section. */
} dasm_Section;

/* Core structure holding the DynASM encoding state. */
struct dasm_State {
  size_t psize;			/* Allocated size of this structure. */
  dasm_ActList actionlist;	/* Current actionlist pointer. */
  int *lglabels;		/* Local/global chain/pos ptrs. */
  size_t lgsize;
  int *pclabels;		/* PC label chains/pos ptrs. */
  size_t pcsize;
  void **globals;		/* Array of globals. */
  dasm_Section *section;	/* Pointer to active section. */
  size_t codesize;		/* Total size of all code sections. */
  int maxsection;		/* 0 <= sectionidx < maxsection. */
  int status;			/* Status code. */
  dasm_Section sections[1];	/* All sections. Alloc-extended. */
};

/* The size of the core structure depends on the max. number of sections. */
#define DASM_PSZ(ms)	(sizeof(dasm_State)+(ms-1)*sizeof(dasm_Section))


/* Initialize DynASM state. */
void dasm_init(Dst_DECL, int maxsection)
{
  dasm_State *D;
  size_t psz = 0;
  Dst_REF = NULL;
  DASM_M_GROW(Dst, struct dasm_State, Dst_REF, psz, DASM_PSZ(maxsection));
  D = Dst_REF;
  D->psize = psz;
  D->lglabels = NULL;
  D->lgsize = 0;
  D->pclabels = NULL;
  D->pcsize = 0;
  D->globals = NULL;
  D->maxsection = maxsection;
  memset((void *)D->sections, 0, maxsection * sizeof(dasm_Section));
}

/* Free DynASM state. */
void dasm_free(Dst_DECL)
{