diff options
Diffstat (limited to 'ld/testsuite/ld-powerpc/pr28827-1.s')
| -rw-r--r-- | ld/testsuite/ld-powerpc/pr28827-1.s | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/ld/testsuite/ld-powerpc/pr28827-1.s b/ld/testsuite/ld-powerpc/pr28827-1.s new file mode 100644 index 00000000000..b9129843c66 --- /dev/null +++ b/ld/testsuite/ld-powerpc/pr28827-1.s @@ -0,0 +1,83 @@ + .globl _start + .type _start,@function + .text +_start: + .cfi_startproc +0: + addis 2,12,(.TOC.-0b)@ha + addi 2,2,(.TOC.-0b)@l + .localentry _start,.-0b + mflr 0 + std 0,16(1) + stdu 1,-32(1) + .cfi_def_cfa_offset 32 + .cfi_offset 65, 16 + + .macro call f + bl \f + nop + .endm + +# 3000 plt calls, giving over 64k in .plt size. With a small .got +# this guarantees some plt call stubs can use a 16-bit signed offset +# from .TOC. while others need a 32-bit signed offset (and are larger). + + .irpc t4,012 + .irpc t3,0123456789 + .irpc t2,0123456789 + .irpc t1,0123456789 + .if \t4 + call f\t4\t3\t2\t1 + .elseif \t3 + call f\t3\t2\t1 + .elseif \t2 + call f\t2\t1 + .else + call f\t1 + .endif + .endr + .endr + .endr + .endr + + addi 1,1,32 + .cfi_def_cfa_offset 0 + ld 0,16(1) + mtlr 0 + .cfi_restore 65 + blr + .cfi_endproc + .size _start,.-_start + +# Padding to trigger a stub sizing error with commit 2f83249c13 and +# c804c6f98d (relro changes). This particular testcase gives a decrease +# in .got to .plt gap after .eh_frame editing, resulting in some plt +# call stubs being smaller. If the very last one is smaller the size +# error triggers. Arguably, the ppc64 backend should not report an +# error for shrinkage. However, the actual PR object files showed an +# *increase* in .got to .plt gap after .eh_frame editing, resulting in +# some plt call stubs being larger. That hit an assertion failure +# when a long branch stub followed the larger plt call stub and +# overwrote the end of the plt call stub. +# With enough fiddling of this testcase it likely would be possible to +# find the right padding here and .eh_frame sizing to trigger an +# increase in .got to .plt gap. The point of this testcase is to show +# that the .got to .plt gap should not change after sizing. + .space 50000 + +# Generate some .eh_frame info that -gc-sections will trim + .macro fundef f + .section .text.\f,"ax",@progbits + .type \f,@function +\f: + .cfi_startproc + blr + .cfi_endproc + .size \f,.-\f + .endm + + .irpc t2,0123456789 + .irpc t1,0123456789 + fundef dummy\t2\t1 + .endr + .endr |