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x86/x64: Call external symbols directly from interpreter code.

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Except for ELF/x86 PIC, where it's easier to use wrappers.
This commit is contained in:
Mike Pall
2014-12-08 01:58:05 +01:00
parent f49c61a277
commit e03df1e339
7 changed files with 43 additions and 18 deletions
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16
src/vm_x86.dasc
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@@ -2084,7 +2084,7 @@ static void build_subroutines(BuildCtx *ctx)
| movsd FPARG1, xmm0
|.endif
| mov RB, BASE
| call extern lj_vm_ .. func
| call extern func
| mov BASE, RB
|.if X64
| jmp ->fff_resxmm0
@@ -5962,15 +5962,21 @@ static void emit_asm_debug(BuildCtx *ctx)
"LEFDEY:\n\n", fcsize);
}
#endif
#if LJ_64
fprintf(ctx->fp, "\t.subsections_via_symbols\n");
#else
#if !LJ_64
fprintf(ctx->fp,
"\t.non_lazy_symbol_pointer\n"
"L_lj_err_unwind_dwarf$non_lazy_ptr:\n"
".indirect_symbol _lj_err_unwind_dwarf\n"
".long 0\n");
".long 0\n\n");
fprintf(ctx->fp, "\t.section __IMPORT,__jump_table,symbol_stubs,pure_instructions+self_modifying_code,5\n");
{
const char *const *xn;
for (xn = ctx->extnames; *xn; xn++)
if (strncmp(*xn, LABEL_PREFIX, sizeof(LABEL_PREFIX)-1))
fprintf(ctx->fp, "L_%s$stub:\n\t.indirect_symbol _%s\n\t.ascii \"\\364\\364\\364\\364\\364\"\n", *xn, *xn);
}
#endif
fprintf(ctx->fp, ".subsections_via_symbols\n");
}
break;
default: /* Difficult for other modes. */