llvm-project/lld/test/ELF/linkerscript/nmagic-alignment.test

# REQUIRES: x86

# Test that mimics a use case of -n to produce a kernel mapped shared-object
# in a non paged context. We specifically want to test:
# - We can allocate the headers into the first program header (via PHDRS)
# typically -n does not allocate headers.
# - The alignment of the .text section is not page aligned.

# RUN: echo ".text; .globl foo; foo: nop" > %t.s
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %t.s -o %t.o
# RUN: ld.lld %t.o -o %t.so --shared --hash-style=sysv --script %s
# RUN: llvm-readobj --program-headers %t.so | FileCheck %s
# RUN: ld.lld %t.o -o %t2.so --shared --hash-style=sysv -n --script %s
# RUN: llvm-readobj --program-headers %t2.so | FileCheck %s --check-prefix=CHECK-N

SECTIONS {
 . = 0x0 + SIZEOF_HEADERS;
 .hash : { *(.hash) } :text
 .dynsym : { *(.dynsym) }
 .dynstr : { *(.dynstr) }
 . = ALIGN(4);
 .text : { *(.text*) }
 .dynamic : { *(.dynamic) } :text :dynamic
}

PHDRS {
 text PT_LOAD FLAGS(5) FILEHDR PHDRS;
 dynamic PT_DYNAMIC FLAGS(4);
}

# CHECK: ProgramHeaders [
# CHECK-NEXT:   ProgramHeader {
# CHECK-NEXT:     Type: PT_LOAD
# CHECK-NEXT:     Offset: 0x0
# CHECK-NEXT:     VirtualAddress: 0x0
# CHECK-NEXT:     PhysicalAddress: 0x0
# CHECK-NEXT:     FileSize:
# CHECK-NEXT:     MemSize:
# CHECK-NEXT:     Flags [
# CHECK-NEXT:       PF_R
# CHECK-NEXT:       PF_X
# CHECK-NEXT:     ]
# CHECK-NEXT:     Alignment: 4096
# CHECK-NEXT:   }
# CHECK-NEXT:   ProgramHeader {
# CHECK-NEXT:     Type: PT_DYNAMIC
# CHECK-NEXT:     Offset: 0x108
# CHECK-NEXT:     VirtualAddress: 0x108
# CHECK-NEXT:     PhysicalAddress: 0x108
# CHECK-NEXT:     FileSize:
# CHECK-NEXT:     MemSize:
# CHECK-NEXT:     Flags [
# CHECK-NEXT:       PF_R
# CHECK-NEXT:     ]
# CHECK-NEXT:     Alignment: 8
# CHECK-NEXT:   }
# CHECK-NEXT: ]

# CHECK-N: ProgramHeaders [
# CHECK-N-NEXT:   ProgramHeader {
# CHECK-N-NEXT:     Type: PT_LOAD
# CHECK-N-NEXT:     Offset: 0x0
# CHECK-N-NEXT:     VirtualAddress: 0x0
# CHECK-N-NEXT:     PhysicalAddress: 0x0
# CHECK-N-NEXT:     FileSize: 360
# CHECK-N-NEXT:     MemSize: 360
# CHECK-N-NEXT:     Flags [
# CHECK-N-NEXT:       PF_R
# CHECK-N-NEXT:       PF_X
# CHECK-N-NEXT:     ]
# CHECK-N-NEXT:     Alignment: 8
# CHECK-N-NEXT:   }
# CHECK-N-NEXT:   ProgramHeader {
# CHECK-N-NEXT:     Type: PT_DYNAMIC
# CHECK-N-NEXT:     Offset: 0x108
# CHECK-N-NEXT:     VirtualAddress: 0x108
# CHECK-N-NEXT:     PhysicalAddress: 0x108
# CHECK-N-NEXT:     FileSize:
# CHECK-N-NEXT:     MemSize:
# CHECK-N-NEXT:     Flags [
# CHECK-N-NEXT:       PF_R
# CHECK-N-NEXT:     ]
# CHECK-N-NEXT:     Alignment: 8
# CHECK-N-NEXT:   }
# CHECK-N-NEXT: ]