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Add GCC compiler option. (#1056)
* GCC support. * Add note about gcc-mips-linux-gnu requirement to README.md. * changes * changes based on Tharo's suggestion * Cant reproduce file_choose.h error. Removing unnecessary -I * changes * wording based on Fig's suggestion * add AVOID_UB for eyes/mouth reordering issue. * remove unneeded flags and deprecate ZAPDFLAGS. * some changes, waiting on prs for the rest * fixes * discard header sections * change section handling in mkldscript * avoid_ub in DmaMgr_GetFileNameImpl * move asm to inline asm (consolidate gcc functions) * change prefix back * remove space * fix warnings * Revert "remove space" This reverts commit94af6977b3
. * Revert "fix warnings" This reverts commitd729ddf457
. * finish up missing_gcc_functions * revert unwanted mkldscript change * temporary workaround. TODO: Stop the asm processor from choking * fix ido build * Revert "temporary workaround. TODO: Stop the asm processor from choking" This reverts commit9df892b7ac
. * review * remove unused line in mkldscript * remove tabs * clarify zf comment * review2 * review * remove duplicate cc_check * vanilla code always come first * std_dma avoid ub * add compiler_gcc to cflags * only use two blocks when necessary * clarify zf comment Co-authored-by: fig02 <fig02srl@gmail.com>
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11 changed files with 420 additions and 42 deletions
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@ -9,6 +9,15 @@
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#include "spec.h"
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#include "util.h"
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// Note: *SECTION ALIGNMENT* Object files built with a compiler such as GCC can, by default, use narrower
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// alignment for sections size, compared to IDO padding sections to a 0x10-aligned size.
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// To properly generate relocations relative to section starts, sections currently need to be aligned
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// explicitly (to 0x10 currently, a narrower alignment might work), otherwise the linker does implicit alignment
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// and inserts padding between the address indicated by section start symbols (such as *SegmentRoDataStart) and
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// the actual aligned start of the section.
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// With IDO, the padding of sections to an aligned size makes the section start at aligned addresses out of the box,
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// so the explicit alignment has no further effect.
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struct Segment *g_segments;
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int g_segmentsCount;
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@ -17,7 +26,8 @@ static void write_ld_script(FILE *fout)
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int i;
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int j;
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fputs("SECTIONS {\n"
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fputs("OUTPUT_ARCH (mips)\n\n"
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"SECTIONS {\n"
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" _RomSize = 0;\n"
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" _RomStart = _RomSize;\n\n",
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fout);
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@ -62,6 +72,7 @@ static void write_ld_script(FILE *fout)
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fprintf(fout, " %s (.text)\n", seg->includes[j].fpath);
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if (seg->includes[j].linkerPadding != 0)
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fprintf(fout, " . += 0x%X;\n", seg->includes[j].linkerPadding);
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fprintf(fout, " . = ALIGN(0x10);\n");
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}
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fprintf(fout, " _%sSegmentTextEnd = .;\n", seg->name);
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@ -73,7 +84,8 @@ static void write_ld_script(FILE *fout)
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for (j = 0; j < seg->includesCount; j++)
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{
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if (!seg->includes[j].dataWithRodata)
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fprintf(fout, " %s (.data)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.data)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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}
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/*
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@ -94,8 +106,11 @@ static void write_ld_script(FILE *fout)
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for (j = 0; j < seg->includesCount; j++)
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{
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if (seg->includes[j].dataWithRodata)
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fprintf(fout, " %s (.data)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.data)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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// Compilers other than IDO, such as GCC, produce different sections such as
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// the ones named directly below. These sections do not contain values that
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// need relocating, but we need to ensure that the base .rodata section
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@ -104,13 +119,14 @@ static void write_ld_script(FILE *fout)
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// the beginning of the entire rodata area in order to remain consistent.
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// Inconsistencies will lead to various .rodata reloc crashes as a result of
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// either missing relocs or wrong relocs.
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fprintf(fout, " %s (.rodata.str1.4)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata.cst4)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata.cst8)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata.str1.4)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata.cst4)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.rodata.cst8)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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}
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//fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " _%sSegmentRoDataEnd = .;\n", seg->name);
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fprintf(fout, " _%sSegmentRoDataSize = ABSOLUTE( _%sSegmentRoDataEnd - _%sSegmentRoDataStart );\n", seg->name, seg->name, seg->name);
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@ -118,9 +134,8 @@ static void write_ld_script(FILE *fout)
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fprintf(fout, " _%sSegmentSDataStart = .;\n", seg->name);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.sdata)\n", seg->includes[j].fpath);
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fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " %s (.sdata)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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fprintf(fout, " _%sSegmentSDataEnd = .;\n", seg->name);
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@ -129,23 +144,20 @@ static void write_ld_script(FILE *fout)
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.ovl)\n", seg->includes[j].fpath);
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fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " _%sSegmentOvlEnd = .;\n", seg->name);
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if (seg->fields & (1 << STMT_increment))
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fprintf(fout, " . += 0x%08X;\n", seg->increment);
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fputs(" }\n", fout);
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//fprintf(fout, " _RomSize += ( _%sSegmentDataEnd - _%sSegmentTextStart );\n", seg->name, seg->name);
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fprintf(fout, " _RomSize += ( _%sSegmentOvlEnd - _%sSegmentTextStart );\n", seg->name, seg->name);
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fprintf(fout, " _%sSegmentRomEndTemp = _RomSize;\n"
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"_%sSegmentRomEnd = _%sSegmentRomEndTemp;\n\n",
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seg->name, seg->name, seg->name);
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// algn end of ROM segment
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// align end of ROM segment
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if (seg->fields & (1 << STMT_romalign))
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fprintf(fout, " _RomSize = (_RomSize + %i) & ~ %i;\n", seg->romalign - 1, seg->romalign - 1);
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@ -156,16 +168,26 @@ static void write_ld_script(FILE *fout)
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" . = ALIGN(0x10);\n"
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" _%sSegmentBssStart = .;\n",
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seg->name, seg->name, seg->name, seg->name);
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if (seg->fields & (1 << STMT_align))
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fprintf(fout, " . = ALIGN(0x%X);\n", seg->align);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.sbss)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.sbss)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.scommon)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.scommon)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.bss)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (.bss)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (COMMON)\n", seg->includes[j].fpath);
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fprintf(fout, " %s (COMMON)\n"
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" . = ALIGN(0x10);\n", seg->includes[j].fpath);
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fprintf(fout, " . = ALIGN(0x10);\n"
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" _%sSegmentBssEnd = .;\n"
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" _%sSegmentEnd = .;\n"
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@ -193,13 +215,55 @@ static void write_ld_script(FILE *fout)
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//fprintf(fout, "\n }\n");
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}
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fputs(" _RomEnd = _RomSize;\n\n", fout);
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fputs(" _RomEnd = _RomSize;\n}\n", fout);
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// Debugging sections
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fputs(
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// mdebug debug sections
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" .mdebug : { *(.mdebug) }" "\n"
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" .mdebug.abi32 : { *(.mdebug.abi32) }" "\n"
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// DWARF debug sections
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// Symbols in the DWARF debugging sections are relative to the beginning of the section so we begin them at 0.
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// DWARF 1
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" .debug 0 : { *(.debug) }" "\n"
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" .line 0 : { *(.line) }" "\n"
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// GNU DWARF 1 extensions
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" .debug_srcinfo 0 : { *(.debug_srcinfo) }" "\n"
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" .debug_sfnames 0 : { *(.debug_sfnames) }" "\n"
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// DWARF 1.1 and DWARF 2
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" .debug_aranges 0 : { *(.debug_aranges) }" "\n"
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" .debug_pubnames 0 : { *(.debug_pubnames) }" "\n"
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// DWARF 2
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" .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }" "\n"
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" .debug_abbrev 0 : { *(.debug_abbrev) }" "\n"
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" .debug_line 0 : { *(.debug_line .debug_line.* .debug_line_end ) }" "\n"
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" .debug_frame 0 : { *(.debug_frame) }" "\n"
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" .debug_str 0 : { *(.debug_str) }" "\n"
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" .debug_loc 0 : { *(.debug_loc) }" "\n"
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" .debug_macinfo 0 : { *(.debug_macinfo) }" "\n"
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// SGI/MIPS DWARF 2 extensions
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" .debug_weaknames 0 : { *(.debug_weaknames) }" "\n"
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" .debug_funcnames 0 : { *(.debug_funcnames) }" "\n"
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" .debug_typenames 0 : { *(.debug_typenames) }" "\n"
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" .debug_varnames 0 : { *(.debug_varnames) }" "\n"
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// DWARF 3
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" .debug_pubtypes 0 : { *(.debug_pubtypes) }" "\n"
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" .debug_ranges 0 : { *(.debug_ranges) }" "\n"
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// DWARF Extension
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" .debug_macro 0 : { *(.debug_macro) }" "\n"
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" .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }" "\n", fout);
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// Discard all other sections not mentioned above
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fputs(" /DISCARD/ :" "\n"
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" {" "\n"
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" *(*);" "\n"
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" }" "\n", fout);
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fputs("}\n", fout);
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}
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static void usage(const char *execname)
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{
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fprintf(stderr, "Nintendo 64 linker script generation tool v0.02\n"
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fprintf(stderr, "Nintendo 64 linker script generation tool v0.03\n"
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"usage: %s SPEC_FILE LD_SCRIPT\n"
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"SPEC_FILE file describing the organization of object files into segments\n"
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"LD_SCRIPT filename of output linker script\n",
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