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llvm-project/lld/test/ELF/linkerscript/header-addr.test

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Fix address computation for headers. If the linker script has SECTIONS, the address computation is now always done in LinkerScript::assignAddresses, like for any other section. Before fixHeaders would do a tentative computation that assignAddresses would sometimes override. This patch also splits the cases where assignAddresses needs to add the headers to the first PT_LOAD and the address computation. The net effect is that we no longer create an empty page for no reason in the included test case, which matches bfd behavior. llvm-svn: 287565
2016-11-22 03:59:33 +08:00
# REQUIRES: x86
[ELF] - Represent tests as linker scripts instead of asm. This follows recently started direction and sometimes allows to fully get rid from `echo` calls. I'll rename changed files to *.test in a follow-up. llvm-svn: 327410
2018-03-13 23:47:14 +08:00
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux /dev/null -o %t.o
# RUN: ld.lld --hash-style=sysv -o %t.so --script %s %t.o -shared
[test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC Also change some options that have different semantics (cause confusion) in llvm-readelf mode: -s => -S -t => --symbols -sd => --section-data llvm-svn: 359651
2019-05-01 13:49:01 +08:00
# RUN: llvm-readobj -l %t.so | FileCheck %s
Fix address computation for headers. If the linker script has SECTIONS, the address computation is now always done in LinkerScript::assignAddresses, like for any other section. Before fixHeaders would do a tentative computation that assignAddresses would sometimes override. This patch also splits the cases where assignAddresses needs to add the headers to the first PT_LOAD and the address computation. The net effect is that we no longer create an empty page for no reason in the included test case, which matches bfd behavior. llvm-svn: 287565
2016-11-22 03:59:33 +08:00
[ELF] - Represent tests as linker scripts instead of asm. This follows recently started direction and sometimes allows to fully get rid from `echo` calls. I'll rename changed files to *.test in a follow-up. llvm-svn: 327410
2018-03-13 23:47:14 +08:00
PHDRS { all PT_LOAD PHDRS; }
SECTIONS {
. = 0x2000 + SIZEOF_HEADERS;
.text : {*(.text)} :all
}
Fix address computation for headers. If the linker script has SECTIONS, the address computation is now always done in LinkerScript::assignAddresses, like for any other section. Before fixHeaders would do a tentative computation that assignAddresses would sometimes override. This patch also splits the cases where assignAddresses needs to add the headers to the first PT_LOAD and the address computation. The net effect is that we no longer create an empty page for no reason in the included test case, which matches bfd behavior. llvm-svn: 287565
2016-11-22 03:59:33 +08:00
# CHECK: ProgramHeaders [
# CHECK-NEXT: ProgramHeader {
# CHECK-NEXT: Type: PT_LOAD
# CHECK-NEXT: Offset: 0x40
[ELF] Don't output headers into a segment if there's no space for them Currently, LLD checks whether there's enough space for headers by checking if headers fit below the address of the first allocated section. However, that's always thue if the binary doesn't start at zero which means that LLD always emits a segment for headers, even if no other sections belong to that segment. This is a problem in cases when linker script is being used with a non-zero start address when we don't want to make the headers visible by not leaving enough space for them. This pattern is common in embedded programming but doesn't work in LLD. This patch changes the behavior of LLD in case when linker script is being to match the behavior of BFD ld and gold, which is to only place headers into a segment when they're covered by some output section. Differential Revision: https://reviews.llvm.org/D36256 llvm-svn: 311586
2017-08-24 02:44:34 +08:00
# CHECK-NEXT: VirtualAddress: 0x2040
# CHECK-NEXT: PhysicalAddress: 0x2040
# CHECK-NEXT: FileSize: 200
# CHECK-NEXT: MemSize: 200
Fix address computation for headers. If the linker script has SECTIONS, the address computation is now always done in LinkerScript::assignAddresses, like for any other section. Before fixHeaders would do a tentative computation that assignAddresses would sometimes override. This patch also splits the cases where assignAddresses needs to add the headers to the first PT_LOAD and the address computation. The net effect is that we no longer create an empty page for no reason in the included test case, which matches bfd behavior. llvm-svn: 287565
2016-11-22 03:59:33 +08:00
# CHECK-NEXT: Flags [
# CHECK-NEXT: PF_R (0x4)
# CHECK-NEXT: PF_W (0x2)
# CHECK-NEXT: PF_X (0x1)
# CHECK-NEXT: ]
# CHECK-NEXT: Alignment: 4096
# CHECK-NEXT: }
# CHECK-NEXT: ]
Use the correct page size. Config->MaxPageSize is what we use for the segment alignment, so that is the one that we have to use for placing the header. llvm-svn: 287569
2016-11-22 04:20:04 +08:00
[ELF] - Represent tests as linker scripts instead of asm. This follows recently started direction and sometimes allows to fully get rid from `echo` calls. I'll rename changed files to *.test in a follow-up. llvm-svn: 327410
2018-03-13 23:47:14 +08:00
# RUN: ld.lld --hash-style=sysv -o %t2.so --script %s %t.o -shared -z max-page-size=0x2000
[test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC Also change some options that have different semantics (cause confusion) in llvm-readelf mode: -s => -S -t => --symbols -sd => --section-data llvm-svn: 359651
2019-05-01 13:49:01 +08:00
# RUN: llvm-readobj -l %t2.so \
Use the correct page size. Config->MaxPageSize is what we use for the segment alignment, so that is the one that we have to use for placing the header. llvm-svn: 287569
2016-11-22 04:20:04 +08:00
# RUN: | FileCheck --check-prefix=MAXPAGE %s
# MAXPAGE: ProgramHeaders [
# MAXPAGE-NEXT: ProgramHeader {
# MAXPAGE-NEXT: Type: PT_LOAD
# MAXPAGE-NEXT: Offset: 0x40
[ELF] Don't output headers into a segment if there's no space for them Currently, LLD checks whether there's enough space for headers by checking if headers fit below the address of the first allocated section. However, that's always thue if the binary doesn't start at zero which means that LLD always emits a segment for headers, even if no other sections belong to that segment. This is a problem in cases when linker script is being used with a non-zero start address when we don't want to make the headers visible by not leaving enough space for them. This pattern is common in embedded programming but doesn't work in LLD. This patch changes the behavior of LLD in case when linker script is being to match the behavior of BFD ld and gold, which is to only place headers into a segment when they're covered by some output section. Differential Revision: https://reviews.llvm.org/D36256 llvm-svn: 311586
2017-08-24 02:44:34 +08:00
# MAXPAGE-NEXT: VirtualAddress: 0x2040
# MAXPAGE-NEXT: PhysicalAddress: 0x2040
# MAXPAGE-NEXT: FileSize: 200
# MAXPAGE-NEXT: MemSize: 200
Use the correct page size. Config->MaxPageSize is what we use for the segment alignment, so that is the one that we have to use for placing the header. llvm-svn: 287569
2016-11-22 04:20:04 +08:00
# MAXPAGE-NEXT: Flags [
# MAXPAGE-NEXT: PF_R
# MAXPAGE-NEXT: PF_W
# MAXPAGE-NEXT: PF_X
# MAXPAGE-NEXT: ]
# MAXPAGE-NEXT: Alignment: 8192
# MAXPAGE-NEXT: }
# MAXPAGE-NEXT: ]