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| author | David O'Brien <obrien@FreeBSD.org> | 2002-10-31 09:08:11 +0000 |
|---|---|---|
| committer | David O'Brien <obrien@gcc.gnu.org> | 2002-10-31 09:08:11 +0000 |
| commit | e8e4c876bcf67039d8f9a8694a4cac4c82f1fb55 (patch) | |
| tree | 998807df78f2320e5bb9d2f86b70e5f8dbcfc32b /gcc/config/sparc | |
| parent | 0d55d45aa5ce43c9b2050c7625e3d7a0a6319cf6 (diff) | |
| download | gcc-e8e4c876bcf67039d8f9a8694a4cac4c82f1fb55.zip gcc-e8e4c876bcf67039d8f9a8694a4cac4c82f1fb55.tar.gz gcc-e8e4c876bcf67039d8f9a8694a4cac4c82f1fb55.tar.bz2 | |
freebsd.h (TRANSFER_FROM_TRAMPOLINE): Define __enable_execute_stack function.
2002-10-31 David O'Brien <obrien@FreeBSD.org>
* config/sparc/freebsd.h (TRANSFER_FROM_TRAMPOLINE): Define
__enable_execute_stack function.
Approved by: David S. Miller <davem@redhat.com>
Message-Id: <20021031.005015.22856738.davem@redhat.com>
From-SVN: r58674
Diffstat (limited to 'gcc/config/sparc')
| -rw-r--r-- | gcc/config/sparc/freebsd.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/config/sparc/freebsd.h b/gcc/config/sparc/freebsd.h index 8149923..73155ae 100644 --- a/gcc/config/sparc/freebsd.h +++ b/gcc/config/sparc/freebsd.h @@ -96,6 +96,37 @@ 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);\ + size_t len; \ + int prot; \ + \ + prot = 0; \ + 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 (addr) \ + 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 ]********************************/ |