From: Richard Henderson <rth@redhat.com>
To: Bo Thorsen <bo@sonofthor.dk>
Cc: patches@x86-64.org, gcc@gcc.gnu.org
Subject: Re: X86-64 setup/configure support patch
Date: Thu, 20 Sep 2001 16:25:00 -0000 [thread overview]
Message-ID: <20010920162517.A1034@redhat.com> (raw)
In-Reply-To: <20010920112057.E4D136B1E9@idefix.sonofthor.dk>
On Thu, Sep 20, 2001 at 12:20:57PM +0100, Bo Thorsen wrote:
> +#undef QUAD_ASM_OP
> +#define QUAD_ASM_OP "\t.quad\t"
[...]
> +/* The svr4 ABI for the i386 says that records and unions are returned
> + in memory. */
> +#undef DEFAULT_PCC_STRUCT_RETURN
> +#define DEFAULT_PCC_STRUCT_RETURN 1
> +
> +#undef ASM_COMMENT_START
> +#define ASM_COMMENT_START "#"
> +
> +/* This is how to output an element of a case-vector that is relative.
> + This is only used for PIC code. See comments by the `casesi' insn in
> + i386.md for an explanation of the expression this outputs. */
> +#undef ASM_OUTPUT_ADDR_DIFF_ELT
> +#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
> + if (TARGET_64BIT) \
> + fprintf (FILE, "\t.long %s%d-.+4+(.-%s%d)\n", LPREFIX, VALUE, LPREFIX,
> REL); \
> + else \
> + fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX,
> VALUE)
> +
> +/* Indicate that jump tables go in the text section. This is
> + necessary when compiling PIC code. */
> +#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic && !TARGET_64BIT)
> +
> +#undef DBX_REGISTER_NUMBER
> +#define DBX_REGISTER_NUMBER(n) \
> + (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
> +
> +/* Output assembler code to FILE to call the profiler.
> + To the best of my knowledge, no Linux libc has required the label
> + argument to mcount. */
> +
> +#define NO_PROFILE_COUNTERS
> +
> +#undef FUNCTION_PROFILER
> +#define FUNCTION_PROFILER(FILE, LABELNO) \
> +{ \
> + if (flag_pic) \
> + fprintf (FILE, "\tcall\t*mcount@GOT(%%ebx)\n"); \
> + else \
> + fprintf (FILE, "\tcall\tmcount\n"); \
> +}
> +
> +#undef SIZE_TYPE
> +#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "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
> +
> +#undef CPP_PREDEFINES
> +#define CPP_PREDEFINES "-D__ELF__ -Dunix -Dlinux -Asystem(posix)"
> +
> +#undef CPP_SPEC
> +#ifdef USE_GNULIBC_1
> +#define CPP_SPEC "%(cpp_cpu) %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__
> -D__pic__} %{posix:-D_POSIX_SOURCE}"
> +#else
> +#define CPP_SPEC "%(cpp_cpu) %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__
> -D__pic__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}
> %{!m32:-D__LONG_MAX__=9223372036854775807L}"
> +#endif
> +
> +#undef CC1_SPEC
> +#define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
> +/* A C statement (sans semicolon) to output to the stdio stream
> + FILE the assembler definition of uninitialized global DECL named
> + NAME whose size is SIZE bytes and alignment is ALIGN bytes.
> + Try to use asm_output_aligned_bss to implement this macro. */
> +
> +#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
> + asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
> +
> +/* A C statement to output to the stdio stream FILE an assembler
> + command to advance the location counter to a multiple of 1<<LOG
> + bytes if it is within MAX_SKIP bytes.
> +
> + This is used to align code labels according to Intel recommendations. */
> +
> +#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
> +#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
> + do { \
> + if ((LOG) != 0) { \
> + if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
> + else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
> + } \
> + } while (0)
> +#endif
> +
> +/* System V Release 4 uses DWARF debugging info. Buf DWARF1 doesn't do
> + 64-bit anything, so we use DWARF2. */
> +
> +#undef DWARF2_DEBUGGING_INFO
> +#undef DWARF_DEBUGGING_INFO
> +#undef DBX_DEBUGGING_INFO
> +#define DWARF2_DEBUGGING_INFO
> +#define DBX_DEBUGGING_INFO
> +#define DWARF2_FRAME_INFO (TARGET_64BIT && TARGET_UNWIND_INFO)
> +#define DWARF2_UNWIND_INFO 1
> +#define ASYNCHRONOUS_DWARF2_UNWIND_INFO (TARGET_64BIT && TARGET_UNWIND_INFO)
> +/* Incorrectly autodetected in cross compilation. */
> +#undef HAVE_AS_DWARF2_DEBUG_LINE
> +#define HAVE_AS_DWARF2_DEBUG_LINE
> +
> +#undef PREFERRED_DEBUGGING_TYPE
> +#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
Why is all this stuff in linux64.h instead of x86_64.h?
There's absolutely nothing linux specific about it.
> +#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)
> +#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)
These have been replaced. You don't need them.
> Index: config/i386/att.h
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/config/i386/att.h,v
> retrieving revision 1.7
> diff -u -r1.7 att.h
> --- att.h 2001/05/20 19:54:04 1.7
> +++ att.h 2001/09/20 11:19:07
> @@ -32,6 +32,8 @@
>
> #define ASM_SHORT "\t.value\t"
> #define ASM_LONG "\t.long\t"
> +#define ASM_QUAD "\t.quad\t"
> +#define ASM_DOUBLE "\t.double\t"
Why?
r~
prev parent reply other threads:[~2001-09-20 16:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-20 4:21 Bo Thorsen
2001-09-20 8:43 ` Bo Thorsen
2001-09-20 16:25 ` Richard Henderson [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20010920162517.A1034@redhat.com \
--to=rth@redhat.com \
--cc=bo@sonofthor.dk \
--cc=gcc@gcc.gnu.org \
--cc=patches@x86-64.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).