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/****************************************************************
* *
* Copyright (c) 2001-2024 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_fcntl.h"
#include "gtm_stdio.h"
#include <errno.h>
#include "gtm_stat.h"
#include <sys/types.h>
#include "gtm_unistd.h"
#include "compiler.h"
#include "obj_gen.h"
#include <rtnhdr.h>
#include "cmd_qlf.h"
#include "cgp.h"
#ifdef UNIX
#include "gtmio.h"
#include "eintr_wrappers.h"
#endif
#include "mmemory.h"
#include "obj_file.h"
#include "alloc_reg.h"
#include "jmp_opto.h"
#include "mlabel2xtern.h"
#include "cg_var.h"
#include "gtm_string.h"
#include "stringpool.h"
#include "rtn_src_chksum.h"
#include "have_crit.h"
GBLREF boolean_t run_time;
GBLREF command_qualifier cmd_qlf;
GBLREF int4 mvmax, mlmax, mlitmax, psect_use_tab[], sa_temps[], sa_temps_offset[];
GBLREF mlabel *mlabtab;
GBLREF mline mline_root;
GBLREF mvar *mvartab;
GBLREF mident module_name, int_module_name;
GBLREF spdesc stringpool;
GBLREF char cg_phase; /* code generation phase */
GBLREF char cg_phase_last; /* previous code generation phase */
GBLREF int4 curr_addr, code_size;
GBLREF char object_file_name[];
GBLREF int object_file_des;
error_def(ERR_SYSCALL);
error_def(ERR_TEXT);
void cg_lab (mtreenode *node, void *do_emit_arg);
/* The sections of the internal GT.M object are grouped according to their type (R/O, R/W).
* Note: Once an object is linked, no section will be released from memory. All sections
* will be retained.
*
* The GT.M object layout on the disk is as follows:
*
* +---------------+
* | rhead | \
* +---------------+ \
* | generated | |
* | code | |
* + - - - - - - - + |
* | variable tbl | | - R/O
* + - - - - - - - + |
* | label tbl | |
* +---------------+ |
* | line num tbl | |
* + - - - - - - - + /
* | lit text pool | /
* +---------------+
* | lit mval tbl |-- R/W
* +---------------+
* | relocations | > - relocations for external syms (not kept after link)
* +---------------+
* | symbol tbl | > - external symbol table (not kept after link)
* +---------------+
*
*/
void obj_code (uint4 src_lines, void *checksum_ctx)
{
int status;
rhdtyp rhead;
mline *mlx, *mly;
var_tabent *vptr;
int4 lnr_pad_len;
intrpt_state_t prev_intrpt_state;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
assert(!run_time);
obj_init();
/* Define the routine name global symbol. */
define_symbol(GTM_MODULE_DEF_PSECT, (mstr *)&int_module_name, 0);
memset(&rhead, 0, SIZEOF(rhead));
alloc_reg();
jmp_opto();
curr_addr = SIZEOF(rhdtyp);
cg_phase = CGP_APPROX_ADDR;
cg_phase_last = CGP_NOSTATE;
code_gen();
code_size = curr_addr;
cg_phase = CGP_ADDR_OPT;
shrink_jmps();
comp_lits(&rhead);
if ((cmd_qlf.qlf & CQ_MACHINE_CODE))
{
cg_phase = CGP_ASSEMBLY;
code_gen();
}
if (!(cmd_qlf.qlf & CQ_OBJECT))
return;
rhead.ptext_ptr = SIZEOF(rhead);
set_rtnhdr_checksum(&rhead, (gtm_rtn_src_chksum_ctx *)checksum_ctx);
rhead.vartab_ptr = code_size;
rhead.vartab_len = mvmax;
code_size += mvmax * SIZEOF(var_tabent);
rhead.labtab_ptr = code_size;
rhead.labtab_len = mlmax;
code_size += mlmax * SIZEOF(lab_tabent);
rhead.lnrtab_ptr = code_size;
rhead.lnrtab_len = src_lines;
rhead.compiler_qlf = cmd_qlf.qlf;
if (cmd_qlf.qlf & CQ_EMBED_SOURCE)
{
rhead.routine_source_offset = TREF(routine_source_offset);
rhead.routine_source_length = (uint4)(stringpool.free - stringpool.base) - TREF(routine_source_offset);
}
rhead.temp_mvals = sa_temps[TVAL_REF];
rhead.temp_size = sa_temps_offset[TCAD_REF];
code_size += src_lines * SIZEOF(int4);
lnr_pad_len = PADLEN(code_size, SECTION_ALIGN_BOUNDARY);
code_size += lnr_pad_len;
DEFER_INTERRUPTS(INTRPT_IN_OBJECT_FILE_COMPILE, prev_intrpt_state);
create_object_file(&rhead);
ENABLE_INTERRUPTS(INTRPT_IN_OBJECT_FILE_COMPILE, prev_intrpt_state);
cg_phase = CGP_MACHINE;
code_gen();
/* Variable table: */
vptr = (var_tabent *)mcalloc(mvmax * SIZEOF(var_tabent));
if (mvartab)
walktree((mtreenode *)mvartab, cg_var, &vptr);
else
assert(0 == mvmax);
emit_immed((char *)vptr, mvmax * SIZEOF(var_tabent));
/* Label table: */
if (mlabtab)
walktree((mtreenode *)mlabtab, cg_lab, rhead.lnrtab_ptr);
else
assert(0 == mlmax);
/* External entry definitions: */
emit_immed((char *)&(mline_root.externalentry->rtaddr), SIZEOF(mline_root.externalentry->rtaddr)); /* line 0 */
for (mlx = mline_root.child; mlx; mlx = mly)
{
if (mlx->table)
emit_immed((char *)&(mlx->externalentry->rtaddr), SIZEOF(mlx->externalentry->rtaddr));
if (0 == (mly = mlx->child)) /* note assignment */
if (0 == (mly = mlx->sibling)) /* note assignment */
for (mly = mlx; ; )
{
if (0 == (mly = mly->parent)) /* note assignment */
break;
if (mly->sibling)
{
mly = mly->sibling;
break;
}
}
}
if (0 != lnr_pad_len) /* emit padding so literal text pool starts on proper boundary */
emit_immed(PADCHARS, lnr_pad_len);
# if !defined(__MVS__) && !defined(__s390__) /* assert not valid for instructions on OS390 */
assert(code_size == psect_use_tab[GTM_CODE]);
# endif
emit_literals();
DEFER_INTERRUPTS(INTRPT_IN_OBJECT_FILE_COMPILE, prev_intrpt_state);
finish_object_file();
ENABLE_INTERRUPTS(INTRPT_IN_OBJECT_FILE_COMPILE, prev_intrpt_state);
CLOSE_OBJECT_FILE(object_file_des, status);
if (-1 == status)
RTS_ERROR_CSA_ABT(NULL, VARLSTCNT(8) ERR_SYSCALL, 5, RTS_ERROR_LITERAL("close()"), CALLFROM, errno);
/* Ready to make object visible. Rename from tmp name to real routine name */
RENAME_TMP_OBJECT_FILE(object_file_name);
}
void cg_lab (mtreenode *node, void *arg)
{
int4 base = *arg;
mstr glob_name;
lab_tabent lent;
if (node->lab.ml && node->lab.gbl)
{
lent.lab_name.len = node->lab.mvname.len;
lent.lab_name.addr = (char *)(node->lab.mvname.addr - (char *)stringpool.base);
lent.LABENT_LNR_OFFSET = (SIZEOF(lnr_tabent) * node->lab.ml->line_number) + base;
lent.has_parms = (NO_FORMALLIST != node->lab.formalcnt); /* Flag to indicate a formallist */
emit_immed((char *)&lent, SIZEOF(lent));
mlabel2xtern(&glob_name, &int_module_name, &node->lab.mvname);
define_symbol(GTM_CODE, &glob_name, lent.LABENT_LNR_OFFSET);
}
}
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