T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add a "colocated" flag to symbol references. (#298)

Browse Source 
This adds a "colocated" flag to function and symbolic global variables which
indicates that they are defined along with the current function, so they can
use PC-relative addressing.

This also changes the function decl syntax; the name now always precedes the
signature, and the "function" keyword is no longer included.
This commit is contained in:
Dan Gohman
2018-04-13 15:00:09 -07:00
committed by GitHub
parent 645fa3e858
commit 0e57f3d0ea
46 changed files with 312 additions and 164 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
cranelift/filetests/isa/x86/binary64-pic.cton
View File

@@ -13,9 +13,11 @@ isa x86 haswell
; Tests for i64 instructions.
function %I64() {
sig0 = ()
fn0 = function %foo()
fn0 = %foo()
fn1 = colocated %bar()
gv0 = globalsym %some_gv
gv1 = globalsym colocated %some_gv
; Use incoming_arg stack slots because they won't be relocated by the frame
; layout.
@@ -29,6 +31,9 @@ ebb0:
; asm: call foo@PLT
call fn0() ; bin: e8 PLTRel4(%foo-4) 00000000
; asm: call foo
call fn1() ; bin: e8 PCRel4(%bar-4) 00000000
; asm: mov 0x0(%rip), %rax
[-,%rax] v0 = func_addr.i64 fn0 ; bin: 48 8b 05 GOTPCRel4(%foo-4) 00000000
; asm: mov 0x0(%rip), %rsi
@@ -50,5 +55,12 @@ ebb0:
; asm: mov 0x0(%rip), %r10
[-,%r10] v5 = globalsym_addr.i64 gv0 ; bin: 4c 8b 15 GOTPCRel4(%some_gv-4) 00000000
; asm: lea 0x0(%rip), %rcx
[-,%rcx] v6 = globalsym_addr.i64 gv1 ; bin: 48 8d 0d PCRel4(%some_gv-4) 00000000
; asm: lea 0x0(%rip), %rsi
[-,%rsi] v7 = globalsym_addr.i64 gv1 ; bin: 48 8d 35 PCRel4(%some_gv-4) 00000000
; asm: lea 0x0(%rip), %r10
[-,%r10] v8 = globalsym_addr.i64 gv1 ; bin: 4c 8d 15 PCRel4(%some_gv-4) 00000000
return
}