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/* Definitions for Linux for S/390.
Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Contributed by Hartmut Penner (hpenner@de.ibm.com) and
Ulrich Weigand (uweigand@de.ibm.com).
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _LINUX_H
#define _LINUX_H
/* Target specific version string. */
#ifdef DEFAULT_TARGET_64BIT
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (Linux for zSeries)");
#else
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (Linux for S/390)");
#endif
/* Target specific type definitions. */
/* ??? Do we really want long as size_t on 31-bit? */
#undef SIZE_TYPE
#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "long unsigned int")
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
#undef WCHAR_TYPE
#define WCHAR_TYPE "int"
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32
/* Target specific preprocessor settings. */
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
builtin_define_std ("linux"); \
builtin_define_std ("unix"); \
builtin_assert ("system=linux"); \
builtin_assert ("system=unix"); \
builtin_define ("__ELF__"); \
builtin_define ("__gnu_linux__"); \
if (flag_pic) \
{ \
builtin_define ("__PIC__"); \
builtin_define ("__pic__"); \
} \
} \
while (0)
/* Target specific compiler settings. */
/* ??? -fcaller-saves sometimes doesn't work. Fix this! */
#undef CC1_SPEC
#define CC1_SPEC "-fno-caller-saves"
#undef CC1PLUS_SPEC
#define CC1PLUS_SPEC "-fno-caller-saves"
/* Target specific assembler settings. */
#ifdef DEFAULT_TARGET_64BIT
#undef ASM_SPEC
#define ASM_SPEC "%{m31:-m31 -Aesa}"
#else
#undef ASM_SPEC
#define ASM_SPEC "%{m64:-m64 -Aesame}"
#endif
/* Target specific linker settings. */
#define LINK_ARCH31_SPEC \
"-m elf_s390 \
%{shared:-shared} \
%{!shared: \
%{static:-static} \
%{!static: \
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
#define LINK_ARCH64_SPEC \
"-m elf64_s390 \
%{shared:-shared} \
%{!shared: \
%{static:-static} \
%{!static: \
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker /lib/ld64.so.1}}}"
#ifdef DEFAULT_TARGET_64BIT
#undef LINK_SPEC
#define LINK_SPEC "%{m31:%(link_arch31)} %{!m31:%(link_arch64)}"
#else
#undef LINK_SPEC
#define LINK_SPEC "%{m64:%(link_arch64)} %{!m64:%(link_arch31)}"
#endif
/* This macro defines names of additional specifications to put in the specs
that can be used in various specifications like CC1_SPEC. Its definition
is an initializer with a subgrouping for each command option. */
#define EXTRA_SPECS \
{ "link_arch31", LINK_ARCH31_SPEC }, \
{ "link_arch64", LINK_ARCH64_SPEC }, \
/* Character to start a comment. */
#define ASM_COMMENT_START "#"
/* Assembler pseudos to introduce constants of various size. */
#define ASM_DOUBLE "\t.double"
/* The LOCAL_LABEL_PREFIX variable is used by dbxelf.h. */
#define LOCAL_LABEL_PREFIX "."
/* Prefix for internally generated assembler labels. */
#define LPREFIX ".L"
/* This is how to output the definition of a user-level label named NAME,
such as the label on a static function or variable NAME. */
#undef ASM_OUTPUT_LABEL
#define ASM_OUTPUT_LABEL(FILE, NAME) \
(assemble_name (FILE, NAME), fputs (":\n", FILE))
/* Store in OUTPUT a string (made with alloca) containing
an assembler-name for a local static variable named NAME.
LABELNO is an integer which is different for each call. */
#undef ASM_FORMAT_PRIVATE_NAME
#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
/* internal macro to output long */
#define _ASM_OUTPUT_LONG(FILE, VALUE) \
fprintf (FILE, "\t.long\t0x%lX\n", VALUE);
/* This is how to output an element of a case-vector that is absolute. */
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
fprintf (FILE, "%s%s%d\n", integer_asm_op (UNITS_PER_WORD, TRUE), \
LPREFIX, VALUE)
/* This is how to output an element of a case-vector that is relative. */
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
fprintf (FILE, "%s%s%d-%s%d\n", integer_asm_op (UNITS_PER_WORD, TRUE), \
LPREFIX, VALUE, LPREFIX, REL)
/* This is how to output an assembler line
that says to advance the location counter
to a multiple of 2**LOG bytes. */
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE, LOG) \
if ((LOG)!=0) fprintf ((FILE), "\t.align\t%d\n", 1<<(LOG))
/* This is how to output an assembler line
that says to advance the location counter by SIZE bytes. */
#undef ASM_OUTPUT_SKIP
#define ASM_OUTPUT_SKIP(FILE, SIZE) \
fprintf ((FILE), "\t.set\t.,.+%u\n", (SIZE))
/* This is how to output assembler code to declare an
uninitialized external linkage data object. */
#undef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
/* Output before read-only data. */
#define TEXT_SECTION_ASM_OP ".text"
/* Output before writable (initialized) data. */
#define DATA_SECTION_ASM_OP ".data"
/* Output before writable (uninitialized) data. */
#define BSS_SECTION_ASM_OP ".bss"
/* This is how to output a command to make the user-level label named NAME
defined for reference from other files. */
#define ASM_GLOBALIZE_LABEL(FILE, NAME) \
(fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))
/* Output code to add DELTA to the first argument, and then jump to FUNCTION.
Used for C++ multiple inheritance. */
#define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
do { \
if (TARGET_64BIT) \
{ \
if (flag_pic) \
{ \
fprintf (FILE, "\tlarl 1,0f\n"); \
fprintf (FILE, "\tagf %d,0(1)\n", \
aggregate_value_p (TREE_TYPE \
(TREE_TYPE (FUNCTION))) ? 3 :2 ); \
fprintf (FILE, "\tlarl 1,"); \
assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \
fprintf (FILE, "@GOTENT\n"); \
fprintf (FILE, "\tlg 1,0(1)\n"); \
fprintf (FILE, "\tbr 1\n"); \
fprintf (FILE, "0:\t.long "); \
fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA)); \
fprintf (FILE, "\n"); \
} \
else \
{ \
fprintf (FILE, "\tlarl 1,0f\n"); \
fprintf (FILE, "\tagf %d,0(1)\n", \
aggregate_value_p (TREE_TYPE \
(TREE_TYPE (FUNCTION))) ? 3 :2 ); \
fprintf (FILE, "\tjg "); \
assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \
fprintf (FILE, "\n"); \
fprintf (FILE, "0:\t.long "); \
fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA)); \
fprintf (FILE, "\n"); \
} \
} \
else \
{ \
if (flag_pic) \
{ \
fprintf (FILE, "\tbras 1,0f\n"); \
fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_-.\n"); \
fprintf (FILE, "\t.long "); \
assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \
fprintf (FILE, "@GOT\n"); \
fprintf (FILE, "\t.long "); \
fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA)); \
fprintf (FILE, "\n"); \
fprintf (FILE, "0:\tal %d,8(1)\n", \
aggregate_value_p (TREE_TYPE \
(TREE_TYPE (FUNCTION))) ? 3 : 2 ); \
fprintf (FILE, "\tl 0,4(1)\n"); \
fprintf (FILE, "\tal 1,0(1)\n"); \
fprintf (FILE, "\talr 1,0\n"); \
fprintf (FILE, "\tl 1,0(1)\n"); \
fprintf (FILE, "\tbr 1\n"); \
} else { \
fprintf (FILE, "\tbras 1,0f\n"); \
fprintf (FILE, "\t.long "); \
assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \
fprintf (FILE, "-.\n"); \
fprintf (FILE, "\t.long "); \
fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, (DELTA)); \
fprintf (FILE, "\n"); \
fprintf (FILE, "0:\tal %d,4(1)\n", \
aggregate_value_p (TREE_TYPE \
(TREE_TYPE (FUNCTION))) ? 3 : 2 ); \
fprintf (FILE, "\tal 1,0(1)\n"); \
fprintf (FILE, "\tbr 1\n"); \
} \
} \
} while (0)
/* Do code reading to identify a signal frame, and set the frame
state data appropriately. See unwind-dw2.c for the structs. */
#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
do { \
unsigned char *pc_ = (CONTEXT)->ra; \
long new_cfa_; \
int i_; \
\
typedef struct \
{ \
unsigned long psw_mask; \
unsigned long psw_addr; \
unsigned long gprs[16]; \
unsigned int acrs[16]; \
unsigned int fpc; \
unsigned int __pad; \
double fprs[16]; \
} __attribute__ ((__aligned__ (8))) sigregs_; \
\
sigregs_ *regs_; \
\
/* svc $__NR_sigreturn or svc $__NR_rt_sigreturn */ \
if (pc_[0] != 0x0a || (pc_[1] != 119 && pc_[1] != 173)) \
break; \
\
/* New-style RT frame: \
retcode + alignment (8 bytes) \
siginfo (128 bytes) \
ucontext (contains sigregs) */ \
if ((CONTEXT)->ra == (CONTEXT)->cfa) \
{ \
struct ucontext_ \
{ \
unsigned long uc_flags; \
struct ucontext_ *uc_link; \
unsigned long uc_stack[3]; \
sigregs_ uc_mcontext; \
} *uc_ = (CONTEXT)->cfa + 8 + 128; \
\
regs_ = &uc_->uc_mcontext; \
} \
\
/* Old-style RT frame and all non-RT frames: \
old signal mask (8 bytes) \
pointer to sigregs */ \
else \
{ \
regs_ = *(sigregs_ **)((CONTEXT)->cfa + 8); \
} \
\
new_cfa_ = regs_->gprs[15] + 16*sizeof(long) + 32; \
(FS)->cfa_how = CFA_REG_OFFSET; \
(FS)->cfa_reg = 15; \
(FS)->cfa_offset = \
new_cfa_ - (long) (CONTEXT)->cfa + 16*sizeof(long) + 32; \
\
for (i_ = 0; i_ < 16; i_++) \
{ \
(FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[i_].loc.offset = \
(long)®s_->gprs[i_] - new_cfa_; \
} \
for (i_ = 0; i_ < 16; i_++) \
{ \
(FS)->regs.reg[16+i_].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[16+i_].loc.offset = \
(long)®s_->fprs[i_] - new_cfa_; \
} \
\
/* Load return addr from PSW into dummy register 32. */ \
(FS)->regs.reg[32].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[32].loc.offset = (long)®s_->psw_addr - new_cfa_; \
(FS)->retaddr_column = 32; \
\
goto SUCCESS; \
} while (0)
#endif
|
