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| author | Patrick Walton <pcwalton@mimiga.net> | 2011-09-28 12:26:36 -0700 |
|---|---|---|
| committer | Patrick Walton <pcwalton@mimiga.net> | 2011-09-28 12:26:36 -0700 |
| commit | d8a80cb31fd8a7a0e6e07df7d5a6aeff6609507e (patch) | |
| tree | 160a98015f9ce8ecbd9da1435a368478c5b006f5 | |
| parent | 1eaaae860fb725f5afdd8912fb2200f4f9929daa (diff) | |
| download | rust-d8a80cb31fd8a7a0e6e07df7d5a6aeff6609507e.tar.gz rust-d8a80cb31fd8a7a0e6e07df7d5a6aeff6609507e.zip | |
rt: Add a call stub that switches to the C stack, untested as of yet
| -rw-r--r-- | mk/rt.mk | 3 | ||||
| -rw-r--r-- | src/rt/arch/i386/ccall.S | 14 | ||||
| -rw-r--r-- | src/rt/arch/i386/context.h | 1 | ||||
| -rw-r--r-- | src/rt/rustrt.def.in | 1 |
4 files changed, 18 insertions, 1 deletions
diff --git a/mk/rt.mk b/mk/rt.mk index 41fa5eb9880..decbd1bc175 100644 --- a/mk/rt.mk +++ b/mk/rt.mk @@ -37,7 +37,8 @@ RUNTIME_CS := rt/sync/timer.cpp \ RUNTIME_LL := -RUNTIME_S := rt/arch/i386/_context.S +RUNTIME_S := rt/arch/i386/_context.S \ + rt/arch/i386/ccall.S RUNTIME_HDR := rt/globals.h \ rt/rust.h \ diff --git a/src/rt/arch/i386/ccall.S b/src/rt/arch/i386/ccall.S new file mode 100644 index 00000000000..7adecc4c5d2 --- /dev/null +++ b/src/rt/arch/i386/ccall.S @@ -0,0 +1,14 @@ + .text + +// upcall_call_c_stack(void (*fn)(), void *new_esp) +.globl _upcall_call_c_stack +_upcall_call_c_stack: + movl %esp,%ecx // grab esp + movl 8(%esp),%eax // save fn + movl 12(%esp),%esp // switch stack + pushl %ecx // save esp on stack + calll *%eax + popl %esp // restore esp + ret + + diff --git a/src/rt/arch/i386/context.h b/src/rt/arch/i386/context.h index a31b4c48d14..9a225b79606 100644 --- a/src/rt/arch/i386/context.h +++ b/src/rt/arch/i386/context.h @@ -37,6 +37,7 @@ public: void swap(context &out); void call(void *f, void *arg, void *sp); + void call(void *f, void *sp); // Note that this doesn't actually adjust esp. Instead, we adjust esp when // we actually do the call. This is needed for exception safety -- if the diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in index f5f75d61c94..d7caebe41a1 100644 --- a/src/rt/rustrt.def.in +++ b/src/rt/rustrt.def.in @@ -66,6 +66,7 @@ task_yield task_join unsupervise upcall_alloc_c_stack +upcall_call_c_stack upcall_cmp_type upcall_dynastack_alloc upcall_dynastack_alloc_2 |