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| author | Michael Meissner <meissner@gcc.gnu.org> | 1993-04-16 20:37:41 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 1993-04-16 20:37:41 +0000 |
| commit | 2def78883190a0a001cb34c537769ac18b196962 (patch) | |
| tree | 60b7012eeda3d9e98d8cb1f6a427fd094d517fd4 | |
| parent | 8a18e16fa65b3e63064eeaaa0481e73942a6972a (diff) | |
| download | gcc-2def78883190a0a001cb34c537769ac18b196962.zip gcc-2def78883190a0a001cb34c537769ac18b196962.tar.gz gcc-2def78883190a0a001cb34c537769ac18b196962.tar.bz2 | |
Allow iris to have its version of the trampoline code.
From-SVN: r4162
| -rw-r--r-- | gcc/config/mips/iris3.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/config/mips/iris3.h b/gcc/config/mips/iris3.h index 7fe40a8b..079da38 100644 --- a/gcc/config/mips/iris3.h +++ b/gcc/config/mips/iris3.h @@ -96,4 +96,35 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Plain char is unsigned in the SGI compiler. */ #define DEFAULT_SIGNED_CHAR 0 + +/* A C statement to initialize the variable parts of a trampoline. + ADDR is an RTX for the address of the trampoline; FNADDR is an + RTX for the address of the nested function; STATIC_CHAIN is an + RTX for the static chain value that should be passed to the + function when it is called. + + Silicon Graphics machines are supposed to not have a mprotect + function to enable execute protection, but the stack already + has execute protection turned on. Because the MIPS chips have + no method to flush the icache without a system call, this can lose + if the same address is used for multiple trampolines. */ + +#define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \ +{ \ + rtx addr = ADDR; \ + emit_move_insn (gen_rtx (MEM, SImode, plus_constant (addr, 28)), FUNC); \ + emit_move_insn (gen_rtx (MEM, SImode, plus_constant (addr, 32)), CHAIN); \ +} + + +/* Attempt to turn on access permissions for the stack. */ + +#define TRANSFER_FROM_TRAMPOLINE \ + \ +void \ +__enable_execute_stack (addr) \ + char *addr; \ +{ \ +} + #include "mips/mips.h" |