sledge-serverles-framwork/libsledge/include/sledge_abi.h

#pragma once

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <threads.h>

/* Do not include runtime headers here! */

/** ABI Types
 * Changes to these types breaks the contract between sledgert and the *.so modules that it runs. This means that all
 * modules must be recompiled. Avoid this!
 */

struct sledge_abi__wasm_table_entry {
	uint32_t type_id;
	void    *func_pointer;
};

struct sledge_abi__wasm_table {
	uint32_t                             length;
	uint32_t                             capacity;
	struct sledge_abi__wasm_table_entry *buffer; /* Backing heap allocation */
};

struct sledge_abi__wasm_memory {
	uint64_t size;     /* Initial Size in bytes */
	uint64_t capacity; /* Size backed by actual pages */
	uint64_t max;      /* Soft cap in bytes. Defaults to 4GB */
	uint8_t *buffer;   /* Backing heap allocation. Different lifetime because realloc might move this */
};

/* This structure is the runtime representation of the unique state of a module instance
 * Currently this is not spec-compliant, as it only supports a single table and a single memory and it excludes many
 * entities https://webassembly.github.io/spec/core/exec/runtime.html#module-instances
 */
struct sledge_abi__wasm_module_instance {
	uint64_t                       wasmg_0; /* Used to refer to the shadow stack */
	struct sledge_abi__wasm_table *table;
	/* Note: memory has an opaque type due to private state. Do not reorder members below this! */
	struct sledge_abi__wasm_memory memory;
	/* Private runtime state follows */
};

/* Symbols expected from sledgert */

extern int32_t sledge_abi__wasm_memory_expand(struct sledge_abi__wasm_memory *wasm_memory, uint32_t page_count);
void           sledge_abi__wasm_memory_initialize_region(struct sledge_abi__wasm_memory *wasm_memory, uint32_t offset,
                                                         uint32_t region_size, uint8_t region[]);

extern int32_t sledge_abi__wasm_globals_get_i32(uint32_t idx);
extern int64_t sledge_abi__wasm_globals_get_i64(uint32_t idx);
extern int32_t sledge_abi__wasm_globals_set_i32(uint32_t idx, int32_t value, bool is_mutable);
extern int32_t sledge_abi__wasm_globals_set_i64(uint32_t idx, int64_t value, bool is_mutable);

/* Wasm initialization functions generated by the aWsm compiler */
extern void     sledge_abi__init_globals(void);
extern void     sledge_abi__init_mem(void);
extern void     sledge_abi__init_tbl(void);
extern int32_t  sledge_abi__entrypoint(void);
extern uint32_t sledge_abi__wasm_memory_starting_pages(void);
extern uint32_t sledge_abi__wasm_memory_max_pages(void);

typedef void (*sledge_abi__init_globals_fn_t)(void);
#define SLEDGE_ABI__INITIALIZE_GLOBALS "sledge_abi__init_globals"

typedef void (*sledge_abi__init_mem_fn_t)(void);
#define SLEDGE_ABI__INITIALIZE_MEMORY "sledge_abi__init_mem"

typedef void (*sledge_abi__init_tbl_fn_t)(void);
#define SLEDGE_ABI__INITIALIZE_TABLE "sledge_abi__init_tbl"

typedef int32_t (*sledge_abi__entrypoint_fn_t)(void);
#define SLEDGE_ABI__ENTRYPOINT "sledge_abi__entrypoint"

typedef uint32_t (*sledge_abi__wasm_memory_starting_pages_fn_t)(void);
#define SLEDGE_ABI__STARTING_PAGES "sledge_abi__wasm_memory_starting_pages"

typedef uint32_t (*sledge_abi__wasm_memory_max_pages_fn_t)(void);
#define SLEDGE_ABI__MAX_PAGES "sledge_abi__wasm_memory_max_pages"

typedef uint32_t __wasi_clockid_t;
typedef uint64_t __wasi_dircookie_t;
typedef uint32_t __wasi_exitcode_t;
typedef int32_t  __wasi_fd_t;
typedef int64_t  __wasi_filedelta_t;
typedef uint64_t __wasi_filesize_t;
typedef uint32_t __wasi_lookupflags_t;
typedef uint64_t __wasi_rights_t;
typedef uint32_t __wasi_size_t;
typedef uint64_t __wasi_timestamp_t;

#ifndef unlikely
#define unlikely(x) __builtin_expect(!!(x), 0)
#endif

#ifndef likely
#define likely(x) __builtin_expect(!!(x), 1)
#endif


uint32_t sledge_abi__wasi_snapshot_preview1_args_get(__wasi_size_t argv_retoffset, __wasi_size_t argv_buf_retoffset);

uint32_t
sledge_abi__wasi_snapshot_preview1_args_sizes_get(__wasi_size_t argc_retoffset, __wasi_size_t argv_buf_len_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_clock_res_get(__wasi_clockid_t id, __wasi_size_t resolution_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_clock_time_get(__wasi_clockid_t clock_id, __wasi_timestamp_t precision,
                                                           __wasi_size_t time_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_environ_get(__wasi_size_t env_retoffset, __wasi_size_t env_buf_retoffset);

uint32_t
sledge_abi__wasi_snapshot_preview1_environ_sizes_get(__wasi_size_t envc_retoffset, __wasi_size_t env_buf_len_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_advise(__wasi_fd_t fd, __wasi_filesize_t file_offset,
                                                      __wasi_filesize_t len, uint32_t advice_extended);

uint32_t
sledge_abi__wasi_snapshot_preview1_fd_allocate(__wasi_fd_t fd, __wasi_filesize_t offset, __wasi_filesize_t len);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_close(__wasi_fd_t fd);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_datasync(__wasi_fd_t fd);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_fdstat_get(__wasi_fd_t fd, __wasi_size_t fdstat_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_fdstat_set_flags(__wasi_fd_t fd, uint32_t fdflags_extended);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_fdstat_set_rights(__wasi_fd_t fd, __wasi_rights_t fs_rights_base,
                                                                 __wasi_rights_t fs_rights_inheriting);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_filestat_get(__wasi_fd_t fd, __wasi_size_t filestat_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_filestat_set_size(__wasi_fd_t fd, __wasi_filesize_t size);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_filestat_set_times(__wasi_fd_t fd, __wasi_timestamp_t atim,
                                                                  __wasi_timestamp_t mtim, uint32_t fstflags_extended);

uint32_t
sledge_abi__wasi_snapshot_preview1_fd_pread(__wasi_fd_t fd, __wasi_size_t iovs_baseoffset, __wasi_size_t iovs_len,
                                            __wasi_filesize_t offset, __wasi_size_t nread_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_prestat_get(__wasi_fd_t fd, __wasi_size_t prestat_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_prestat_dir_name(__wasi_fd_t fd, __wasi_size_t dirname_retoffset,
                                                                __wasi_size_t dirname_len);

uint32_t
sledge_abi__wasi_snapshot_preview1_fd_pwrite(__wasi_fd_t fd, __wasi_size_t iovs_baseoffset, __wasi_size_t iovs_len,
                                             __wasi_filesize_t file_offset, __wasi_size_t nwritten_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_read(__wasi_fd_t fd, __wasi_size_t iovs_baseoffset,
                                                    __wasi_size_t iovs_len, __wasi_size_t nread_retoffset);

uint32_t
sledge_abi__wasi_snapshot_preview1_fd_readdir(__wasi_fd_t fd, __wasi_size_t buf_baseoffset, __wasi_size_t buf_len,
                                              __wasi_dircookie_t cookie, __wasi_size_t nread_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_renumber(__wasi_fd_t fd, __wasi_fd_t to);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_seek(__wasi_fd_t fd, __wasi_filedelta_t file_offset,
                                                    uint32_t whence_extended, __wasi_size_t newoffset_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_sync(__wasi_fd_t fd);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_tell(__wasi_fd_t fd, __wasi_size_t fileoffset_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_fd_write(__wasi_fd_t fd, __wasi_size_t iovs_baseoffset,
                                                     __wasi_size_t iovs_len, __wasi_size_t nwritten_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_path_create_directory(__wasi_fd_t fd, __wasi_size_t path_baseoffset,
                                                                  __wasi_size_t path_len);

uint32_t sledge_abi__wasi_snapshot_preview1_path_filestat_get(__wasi_fd_t fd, __wasi_lookupflags_t flags,
                                                              __wasi_size_t path_baseoffset, __wasi_size_t path_len,
                                                              __wasi_size_t filestat_retoffset);

uint32_t
sledge_abi__wasi_snapshot_preview1_path_filestat_set_times(__wasi_fd_t fd, __wasi_lookupflags_t flags,
                                                           __wasi_size_t path_baseoffset, __wasi_size_t path_len,
                                                           __wasi_timestamp_t atim, __wasi_timestamp_t mtim,
                                                           uint32_t fstflags_extended);

uint32_t sledge_abi__wasi_snapshot_preview1_path_link(__wasi_fd_t old_fd, __wasi_lookupflags_t old_flags,
                                                      __wasi_size_t old_path_baseoffset, __wasi_size_t old_path_len,
                                                      __wasi_fd_t new_fd, __wasi_size_t new_path_baseoffset,
                                                      __wasi_size_t new_path_len);

uint32_t sledge_abi__wasi_snapshot_preview1_path_open(__wasi_fd_t dirfd, __wasi_lookupflags_t lookupflags,
                                                      __wasi_size_t path_baseoffset, __wasi_size_t path_len,
                                                      uint32_t oflags_extended, __wasi_rights_t fs_rights_base,
                                                      __wasi_rights_t fs_rights_inheriting, uint32_t fdflags_extended,
                                                      __wasi_size_t fd_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_path_readlink(__wasi_fd_t fd, __wasi_size_t path_baseoffset,
                                                          __wasi_size_t path_len, __wasi_size_t buf_baseretoffset,
                                                          __wasi_size_t buf_len, __wasi_size_t nread_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_path_remove_directory(__wasi_fd_t fd, __wasi_size_t path_baseoffset,
                                                                  __wasi_size_t path_len);

uint32_t sledge_abi__wasi_snapshot_preview1_path_rename(__wasi_fd_t fd, __wasi_size_t old_path_baseoffset,
                                                        __wasi_size_t old_path_len, __wasi_fd_t new_fd,
                                                        __wasi_size_t new_path_baseoffset, __wasi_size_t new_path_len);

uint32_t sledge_abi__wasi_snapshot_preview1_path_symlink(__wasi_size_t old_path_baseoffset, __wasi_size_t old_path_len,
                                                         __wasi_fd_t fd, __wasi_size_t new_path_baseoffset,
                                                         __wasi_size_t new_path_len);

uint32_t sledge_abi__wasi_snapshot_preview1_path_unlink_file(__wasi_fd_t fd, __wasi_size_t path_baseoffset,
                                                             __wasi_size_t path_len);

uint32_t sledge_abi__wasi_snapshot_preview1_poll_oneoff(__wasi_size_t in_baseoffset, __wasi_size_t out_baseoffset,
                                                        __wasi_size_t nsubscriptions, __wasi_size_t nevents_retoffset);

void sledge_abi__wasi_snapshot_preview1_proc_exit(__wasi_exitcode_t exitcode);

uint32_t sledge_abi__wasi_snapshot_preview1_proc_raise(uint32_t sig_extended);

uint32_t sledge_abi__wasi_snapshot_preview1_random_get(__wasi_size_t buf_baseretoffset, __wasi_size_t buf_len);

uint32_t sledge_abi__wasi_snapshot_preview1_sched_yield(void);

uint32_t sledge_abi__wasi_snapshot_preview1_sock_recv(__wasi_fd_t fd, __wasi_size_t ri_data_baseretoffset,
                                                      __wasi_size_t ri_data_len, uint32_t ri_flags_extended,
                                                      __wasi_size_t ri_data_nbytes_retoffset,
                                                      __wasi_size_t message_nbytes_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_sock_send(__wasi_fd_t fd, __wasi_size_t si_data_baseoffset,
                                                      __wasi_size_t si_data_len, uint32_t si_flags_extended,
                                                      __wasi_size_t nbytes_retoffset);

uint32_t sledge_abi__wasi_snapshot_preview1_sock_shutdown(__wasi_fd_t fd, uint32_t how);