mirror of https://github.com/ctm/syn68k.git
Fixed native code generation for Mac OS X (but still have other Mac OS X problems).
This commit is contained in:
Clifford Matthews
parent
d0035f4d92
commit
944f070990
9
README
9
README
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@ -36,12 +36,9 @@ glibc-devel.i386 and libgcc.i386) then try this hack
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make
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make install
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Syn68k doesn't currently compile under Mac OS X (tested under 10.5.7)
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due to the use of leading underscores in the symbol table (this is
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easily fixed) and and due to their version of ld not knowing that
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-2147483648 is a valid 32-bit relative offset (the error message is
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ld: rel32 out of range in _code_start_24 in _code_start_24). That's a
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little harder to fix.
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Syn68k currently doesn't build under Mac OS X (tested under 10.5.7)
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do to our unconditional use of "-z execstack" when linking as well as
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the fact that i486-cleanup.pl essentially consumes all of syn68k.s.
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To test syn68k, run test/syngentest and compare the output to
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test/output/10000. It should be the same. If you want to be
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7
TODO
7
TODO
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@ -1,6 +1,9 @@
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$Id: TODO 77 2005-01-04 23:51:13Z ctm $
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Mac OS X fixes:
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Make it so that we can install libsyn68k.a and the .h files
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Don't link with -z execstack if that's going to fail
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figure out why i486-cleanup.pl basically eats all
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of syn68k.s
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Make so we can build the various debug versions, non-native, etc.
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@ -4,7 +4,7 @@ AC_INIT(syn68k, 1.0, ctm@ardi.com)
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AM_INIT_AUTOMAKE
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AC_CONFIG_SRCDIR([syngen/main.c])
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AC_CONFIG_HEADER([config.h])
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AC_CONFIG_HEADERS([include/config.h])
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# Checks for programs.
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AC_PROG_CC
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@ -114,6 +114,11 @@ AC_C_INLINE
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AC_TYPE_SIZE_T
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AC_C_VOLATILE
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AC_LTDL_SYMBOL_USCORE
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if test x"$ac_cv_sys_symbol_underscore" = xyes ; then
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AC_DEFINE(HAVE_SYMBOL_UNDERSCORE, 1, [Define if C symbols have leading underscores])
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fi
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# Checks for library functions.
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AC_FUNC_ALLOCA
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AC_FUNC_ERROR_AT_LINE
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@ -1,4 +1,4 @@
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/* $Id: process.c 82 2005-05-11 23:41:32Z ctm $ */
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#include "config.h"
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#include "template.h"
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#include "process.h"
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@ -291,11 +291,24 @@ typedef struct
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long value[MAX_VALUE_SET_ENTRIES];
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} value_set_t;
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/*
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* The addition of BROKEN_SIZE_32 (see template.h) and
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* immediate_values[3] is a hacky workaround for Mac OS X's ld which
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* doesn't recognize 0x80000000 (-2147483648) as a legitimate 32-bit
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* relocatable offset. This prevents calls and jumps from being
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* properly analyzed.
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*
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* For now we sacrifice the analysis of that bit pattern in the few
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* template entries that would normally have it. We currently do this
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* unconditionally because nobody has yet written a configure macro to
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* detect this problem and then only use "BROKEN_SIZE_32" when we have
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* a broken ld.
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*/
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static int
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create_asmdata (const template_t *t, int num_operands)
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{
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static const value_set_t immediate_values[3] =
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static const value_set_t immediate_values[] =
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{ { 12, { 0, 1, 2, -1, -2, 127, -128, -127, 0x37, -100, 0x12, -97 } },
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{ 23, { 0, 1, 2, 0xFF, 0xFE, 127, -129, -128, -127, 128, 0x37,
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-100, 0x12, -97, 32767, -32768, -32767, -1, -2, 0x871,
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@ -305,6 +318,12 @@ create_asmdata (const template_t *t, int num_operands)
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32767, -32768, -32767, -1, 0xFFFE, 0x871, 0xFA03,
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0x1234, 0x8765, 0x7FFFFFFF, 0x80000000, 0x80000001,
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0xFFFFFFFF, 0xFFFFFFFE, 0x871529, 0x392332, 0xFA034433,
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0x12345678, 0x87654321 } },
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{ 32, { 0, 1, 2, 0xFF, 0xFE, 128, -129, 127, -128, -127, 0x37, -100,
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0x12, -97,
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32767, -32768, -32767, -1, 0xFFFE, 0x871, 0xFA03,
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0x1234, 0x8765, 0x7FFFFFFF, 0x80000001,
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0xFFFFFFFF, 0xFFFFFFFE, 0x871529, 0x392332, 0xFA034433,
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0x12345678, 0x87654321 } }
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};
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#if 0
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@ -377,6 +396,11 @@ create_asmdata (const template_t *t, int num_operands)
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{
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char code[2][1024];
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int new_code = 0;
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#if defined(HAVE_SYMBOL_UNDERSCORE)
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const char *symbol_prefix = "_";
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#else
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const char *symbol_prefix = "";
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#endif
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strcpy (&code[new_code][0], t->code);
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for (op = 0; op < num_operands; op++)
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@ -394,10 +418,10 @@ create_asmdata (const template_t *t, int num_operands)
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fprintf (fp,
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" asm volatile (\"\\n\"\n"
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" \"code_start_%d:\\n\\t\"\n"
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" \"%scode_start_%d:\\n\\t\"\n"
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" \"%s\\n\"\n"
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" \"code_end_%d:\");\n",
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current, code[new_code], current);
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" \"%scode_end_%d:\");\n",
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symbol_prefix, current, code[new_code], symbol_prefix, current);
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/* Try the next combination of operands. */
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for (op = num_operands - 1; op >= 0; op--)
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@ -1,7 +1,16 @@
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#include "config.h"
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#include "template.h"
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/* $Id: template.c 61 2004-12-21 23:44:50Z ctm $ */
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#if defined(HAVE_SYMBOL_UNDERSCORE)
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# define SYMBOL_PREFIX "_"
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#else
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# define SYMBOL_PREFIX ""
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#endif
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const template_t template[] =
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{
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#define BINARY_OP(op, dstio, memout) \
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@ -624,9 +633,9 @@ const template_t template[] =
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{ { SIZE_32, REGISTER, INOUT } } },
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{ "i386_call_abs", "", "", "", "volatile", "v",
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"call %P0",
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"call " SYMBOL_PREFIX "%P0",
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{ "addr" },
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{ { SIZE_32, CONSTANT, IN } } },
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{ { BROKEN_SIZE_32, CONSTANT, IN } } },
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{ "i386_cbtw", "", "", "(reg8 AL)", "(reg16 AX)", "-",
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"cbtw",
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@ -707,9 +716,9 @@ const template_t template[] =
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#define CONDL_BRANCH(op, flags) \
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{ "i386_" op, flags, "", "", "volatile", "v", \
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op " %P0", \
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op " " SYMBOL_PREFIX "%P0", \
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{ "target" }, \
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{ { SIZE_32, CONSTANT, IN } } }
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{ { BROKEN_SIZE_32, CONSTANT, IN } } }
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CONDL_BRANCH ("jc", "c"),
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CONDL_BRANCH ("jbe", "cz"),
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@ -727,9 +736,9 @@ const template_t template[] =
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CONDL_BRANCH ("js", "s"),
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{ "i386_jmp", "", "", "", "volatile", "v",
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"jmp %P0",
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"jmp " SYMBOL_PREFIX "%P0",
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{ "target" },
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{ { SIZE_32, CONSTANT, IN } } },
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{ { BROKEN_SIZE_32, CONSTANT, IN } } },
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{ "i386_jmp_reg", "", "", "", "volatile", "-",
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"jmp *%0",
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{ "target" },
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@ -16,7 +16,12 @@ typedef enum
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IN, OUT, INOUT
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} io_t;
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typedef enum { SIZE_8, SIZE_16, SIZE_32 } byte_size_t;
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/* BROKEN_SIZE_32 is a variant of SIZE_32 that is only used with addresses
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that cause trouble on Mac OS X's ld. The problem ld doesn't recognize
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0x80000000 (-2147483648) as a legitimate 32-bit relative offset. See
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the extended comment in process.c for more info */
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typedef enum { SIZE_8, SIZE_16, SIZE_32, BROKEN_SIZE_32 } byte_size_t;
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typedef struct
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{
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