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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-06-28 14:06:52 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-06-28 14:06:52 -0400 |
| commit | cd2b3e6bf4637aaa94ca25ac51697738016ce363 (patch) | |
| tree | 5f7cff7633392db2e244ec82db813e26b7aba4de | |
| parent | 800e920a338b6a1fe40290d3c2ec4d99fdbc58cd (diff) | |
| download | gcc-cd2b3e6bf4637aaa94ca25ac51697738016ce363.zip gcc-cd2b3e6bf4637aaa94ca25ac51697738016ce363.tar.gz gcc-cd2b3e6bf4637aaa94ca25ac51697738016ce363.tar.bz2 | |
(INITIALIZE_TRAMPOLINE): New definition.
From-SVN: r12355
| -rw-r--r-- | gcc/config/alpha/linux.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/config/alpha/linux.h b/gcc/config/alpha/linux.h index 9dfab6e..8e3f9e6 100644 --- a/gcc/config/alpha/linux.h +++ b/gcc/config/alpha/linux.h @@ -70,3 +70,30 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #define TARGET_PROFILING_NEEDS_GP #undef ASM_FINAL_SPEC + +/* Emit RTL insns to initialize the variable parts of a trampoline. + FNADDR is an RTX for the address of the function's pure code. + CXT is an RTX for the static chain value for the function. + + This differs from the standard version in that: + + We do not initialize the "hint" field because it is not the case + that the target is in range of something on the stack. We save + a bogus branch-prediction cache line load by not setting "hint". + + Linux always has an executable stack -- no need for a system call. + */ + +#undef INITIALIZE_TRAMPOLINE +#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ +{ \ + rtx _addr; \ + \ + _addr = memory_address (Pmode, plus_constant ((TRAMP), 16)); \ + emit_move_insn (gen_rtx (MEM, Pmode, _addr), (FNADDR)); \ + _addr = memory_address (Pmode, plus_constant ((TRAMP), 24)); \ + emit_move_insn (gen_rtx (MEM, Pmode, _addr), (CXT)); \ + \ + emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode, \ + gen_rtvec (1, const0_rtx), 0)); \ +} |