20b8779ea9
Tools from later versions of the OS deprecate or fail to support earlier OS revisions. Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> libgcc/ChangeLog: * config.host: Arrange to set min Darwin OS versions from the configured host version. * config/darwin10-unwind-find-enc-func.c: Do not use current headers, but declare the nexessary structures locally to the versions in use for Mac OSX 10.6. * config/t-darwin: Amend to handle configured min OS versions. * config/t-darwin-min-1: New. * config/t-darwin-min-5: New. * config/t-darwin-min-8: New.
40 lines
1 KiB
C
40 lines
1 KiB
C
#include "libgcc_tm.h"
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/* This shim is special, it needs to be built for Mac OSX 10.6
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regardless of the current system version.
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We must also build it to use the unwinder layout that was
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present for 10.6 (and not update that).
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So we copy the referenced structures from unwind-dw2-fde.h
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to avoid pulling in newer system headers and/or changed
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layouts. */
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struct dwarf_eh_bases
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{
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void *tbase;
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void *dbase;
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void *func;
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};
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typedef int sword __attribute__ ((mode (SI)));
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typedef unsigned int uword __attribute__ ((mode (SI)));
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/* The first few fields of an FDE. */
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struct dwarf_fde
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{
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uword length;
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sword CIE_delta;
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unsigned char pc_begin[];
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} __attribute__ ((packed, aligned (__alignof__ (void *))));
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typedef struct dwarf_fde fde;
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extern const fde * _Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
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void *
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_darwin10_Unwind_FindEnclosingFunction (void *pc)
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{
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struct dwarf_eh_bases bases;
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const struct dwarf_fde *fde = _Unwind_Find_FDE (pc-1, &bases);
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if (fde)
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return bases.func;
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return (void *) 0;
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}
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