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PPC: Add frame unwind info for assembler part.

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Add define for target-specific exception handler return register.
This commit is contained in:
Mike Pall
2010-09-28 17:50:33 +02:00
parent dc4fdecfb5
commit a47136031e
3 changed files with 96 additions and 15 deletions
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86
src/buildvm_ppc.dasc
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@@ -2773,7 +2773,89 @@ static int build_backend(BuildCtx *ctx)
/* Emit pseudo frame-info for all assembler functions. */
static void emit_asm_debug(BuildCtx *ctx)
{
/* NYI */
UNUSED(ctx);
int i;
switch (ctx->mode) {
case BUILD_elfasm:
fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
fprintf(ctx->fp,
".Lframe0:\n"
"\t.long .LECIE0-.LSCIE0\n"
".LSCIE0:\n"
"\t.long 0xffffffff\n"
"\t.byte 0x1\n"
"\t.string \"\"\n"
"\t.uleb128 0x1\n"
"\t.sleb128 -4\n"
"\t.byte 65\n"
"\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
"\t.align 2\n"
".LECIE0:\n\n");
fprintf(ctx->fp,
".LSFDE0:\n"
"\t.long .LEFDE0-.LASFDE0\n"
".LASFDE0:\n"
"\t.long .Lframe0\n"
"\t.long .Lbegin\n"
"\t.long %d\n"
"\t.byte 0xe\n\t.uleb128 %d\n"
"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n",
(int)ctx->codesz, CFRAME_SIZE);
for (i = 14; i <= 31; i++)
#if LJ_TARGET_PPCSPE
fprintf(ctx->fp,
"\t.byte %d\n\t.uleb128 %d\n"
"\t.byte 5\n\t.uleb128 %d\n\t.uleb128 %d\n",
0x80+i, 1+2*(31-i), 1200+i, 2+2*(31-i));
#else
#error "missing frame info for saved registers"
#endif
fprintf(ctx->fp,
"\t.align 2\n"
".LEFDE0:\n\n");
fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
fprintf(ctx->fp,
".Lframe1:\n"
"\t.long .LECIE1-.LSCIE1\n"
".LSCIE1:\n"
"\t.long 0\n"
"\t.byte 0x1\n"
"\t.string \"zPR\"\n"
"\t.uleb128 0x1\n"
"\t.sleb128 -4\n"
"\t.byte 65\n"
"\t.uleb128 6\n" /* augmentation length */
"\t.byte 0x1b\n" /* pcrel|sdata4 */
"\t.long lj_err_unwind_dwarf-.\n"
"\t.byte 0x1b\n" /* pcrel|sdata4 */
"\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
"\t.align 2\n"
".LECIE1:\n\n");
fprintf(ctx->fp,
".LSFDE1:\n"
"\t.long .LEFDE1-.LASFDE1\n"
".LASFDE1:\n"
"\t.long .LASFDE1-.Lframe1\n"
"\t.long .Lbegin-.\n"
"\t.long %d\n"
"\t.uleb128 0\n" /* augmentation length */
"\t.byte 0xe\n\t.uleb128 %d\n"
"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n",
(int)ctx->codesz, CFRAME_SIZE);
for (i = 14; i <= 31; i++)
#if LJ_TARGET_PPCSPE
fprintf(ctx->fp,
"\t.byte %d\n\t.uleb128 %d\n"
"\t.byte 5\n\t.uleb128 %d\n\t.uleb128 %d\n",
0x80+i, 1+2*(31-i), 1200+i, 2+2*(31-i));
#else
#error "missing frame info for saved registers"
#endif
fprintf(ctx->fp,
"\t.align 2\n"
".LEFDE1:\n\n");
break;
default:
break;
}
}