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ARM: Add frame unwind info for assembler part.

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This commit is contained in:
Mike Pall 2011-03-29 02:23:05 +02:00
parent 71f976b02e
commit 3bcb48c6a1
1 changed files with 37 additions and 1 deletions
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38
src/buildvm_arm.dasc
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@ -1004,6 +1004,42 @@ static int build_backend(BuildCtx *ctx)
/* Emit pseudo frame-info for all assembler functions. */ /* Emit pseudo frame-info for all assembler functions. */
static void emit_asm_debug(BuildCtx *ctx) static void emit_asm_debug(BuildCtx *ctx)
{ {
UNUSED(ctx); /* NYI */ 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 0xe\n" /* Return address is in lr. */
"\t.byte 0xc\n\t.uleb128 0xd\n\t.uleb128 0\n" /* def_cfa sp */
"\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" /* def_cfa_offset */
"\t.byte 0x8e\n\t.uleb128 1\n", /* Restore lr. */
(int)ctx->codesz, CFRAME_SIZE);
for (i = 11; i >= 4; i--) /* Restore r4-r11. */
fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+i, 2+(11-i));
fprintf(ctx->fp,
"\t.align 2\n"
".LEFDE0:\n\n");
/* NYI: emit ARM.exidx. */
break;
default:
break;
}
} }