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llvm-mirror/test/MC/ARM/elf-reloc-01.ll
Tim Northover 2dbbd221f7 Added Mapping Symbols for ARM ELF
Before this patch, when you objdump an LLVM-compiled file, objdump tried to
decode data-in-code sections as if they were code.  This patch adds the missing
Mapping Symbols, as defined by "ELF for the ARM Architecture" (ARM IHI 0044D).

Patch based on work by Greg Fitzgerald.

llvm-svn: 169609
2012-12-07 16:50:23 +00:00

71 lines
2.6 KiB
LLVM

;; RUN: llc -mtriple=armv7-linux-gnueabi -O3 \
;; RUN: -mcpu=cortex-a8 -mattr=-neon -mattr=+vfp2 -arm-reserve-r9 \
;; RUN: -filetype=obj %s -o - | \
;; RUN: elf-dump --dump-section-data | FileCheck -check-prefix=OBJ %s
;; FIXME: This file needs to be in .s form!
;; The args to llc are there to constrain the codegen only.
;;
;; Ensure no regression on ARM/gcc compatibility for
;; emitting explicit symbol relocs for nonexternal symbols
;; versus section symbol relocs (with offset) -
;;
;; Default llvm behavior is to emit as section symbol relocs nearly
;; everything that is not an undefined external. Unfortunately, this
;; diverges from what codesourcery ARM/gcc does!
;;
;; Tests that reloc to _MergedGlobals show up as explicit symbol reloc
target triple = "armv7-none-linux-gnueabi"
@var_tls = thread_local global i32 1
@var_tls_double = thread_local global double 1.000000e+00
@var_static = internal global i32 1
@var_static_double = internal global double 1.000000e+00
@var_global = global i32 1
@var_global_double = global double 1.000000e+00
declare i32 @mystrlen(i8* nocapture %s) nounwind
declare void @myhextochar(i32 %n, i8* nocapture %buffer)
declare void @__aeabi_read_tp() nounwind
declare void @__nacl_read_tp() nounwind
define i32 @main(i32 %argc, i8** nocapture %argv) nounwind {
entry:
switch i32 %argc, label %bb3 [
i32 555, label %bb
i32 6666, label %bb2
]
bb: ; preds = %entry
store volatile i32 11, i32* @var_tls, align 4
store volatile double 2.200000e+01, double* @var_tls_double, align 8
store volatile i32 33, i32* @var_static, align 4
store volatile double 4.400000e+01, double* @var_static_double, align 8
store volatile i32 55, i32* @var_global, align 4
store volatile double 6.600000e+01, double* @var_global_double, align 8
br label %bb3
bb2: ; preds = %entry
ret i32 add (i32 add (i32 add (i32 ptrtoint (i32* @var_tls to i32), i32 add (i32 ptrtoint (i32* @var_static to i32), i32 ptrtoint (i32* @var_global to i32))), i32 ptrtoint (double* @var_tls_double to i32)), i32 add (i32 ptrtoint (double* @var_static_double to i32), i32 ptrtoint (double* @var_global_double to i32)))
bb3: ; preds = %bb, %entry
tail call void @exit(i32 55) noreturn nounwind
unreachable
}
declare void @exit(i32) noreturn nounwind
;; OBJ: Relocation 1
;; OBJ-NEXT: 'r_offset',
;; OBJ-NEXT: 'r_sym', 0x000007
;; OBJ-NEXT: 'r_type', 0x2b
;; OBJ: Symbol 7
;; OBJ-NEXT: '_MergedGlobals'
;; OBJ-NEXT: 'st_value', 0x00000010