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Sync with the stock FSF 3.2 file. This adds TRANSFER_FROM_TRAMPOLINE,

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which is needed in order for nexted C functions to work.
This commit is contained in:
David E. O'Brien 2002-11-05 03:35:56 +00:00
parent 851c3ad031
commit 81ac040a36
1 changed files with 26 additions and 0 deletions
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26
contrib/gcc/config/sparc/freebsd.h
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@ -26,6 +26,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#undef CPP_CPU64_DEFAULT_SPEC
#define CPP_CPU64_DEFAULT_SPEC "-D__sparc64__ -D__sparc_v9__ -D__arch64__"
/* Because we include sparc/sysv4.h. */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES FBSD_CPP_PREDEFINES
@ -102,6 +103,31 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#undef SPARC_DEFAULT_CMODEL
#define SPARC_DEFAULT_CMODEL CM_MEDLOW
#define TRANSFER_FROM_TRAMPOLINE \
static int need_enable_exec_stack; \
static void check_enabling(void) __attribute__ ((constructor)); \
static void check_enabling(void) \
{ \
extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\
int prot = 0; \
size_t len = sizeof(prot); \
\
sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0); \
if (prot != 7) \
need_enable_exec_stack = 1; \
} \
extern void __enable_execute_stack (void *); \
void __enable_execute_stack (void *addr) \
{ \
if (!need_enable_exec_stack) \
return; \
else { \
/* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \
if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0) \
perror ("mprotect of trampoline code"); \
} \
}
/************************[ Assembler stuff ]********************************/