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llvm-project/llvm/test/MC/ELF/empty.s

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[llvm-readobj] Change -long-option to --long-option in tests. NFC We use both -long-option and --long-option in tests. Switch to --long-option for consistency. In the "llvm-readelf" mode, -long-option is discouraged as it conflicts with grouped short options and it is not accepted by GNU readelf. While updating the tests, change llvm-readobj -s to llvm-readobj -S to reduce confusion ("s" is --section-headers in llvm-readobj but --symbols in llvm-readelf). llvm-svn: 359649
2019-05-01 13:27:20 +08:00
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | llvm-readobj -S | FileCheck %s
// RUN: llvm-mc -filetype=obj -triple x86_64-apple-darwin14.0.0-elf %s -o - | llvm-readobj -S | FileCheck %s -check-prefix=DARWIN
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-win32-elf %s -o - | llvm-readobj -S | FileCheck %s -check-prefix=WINDOWS
Respect object format choice on Darwin Summary: The object format can be set to something other than MachO, e.g. to use ELF-on-Darwin for MCJIT. This already works on Windows, so there's no reason it shouldn't on Darwin. Reviewers: lhames, grosbach Subscribers: rafael, grosbach, t.p.northover, llvm-commits Differential Revision: http://reviews.llvm.org/D6185 llvm-svn: 236455
2015-05-05 04:03:01 +08:00
// Check that we can create ELF files for darwin/windows, even though
// it is not the default file format.
// DARWIN: Format: ELF64-x86-64
// WINDOWS: Format: ELF64-x86-64
// DARWIN-NEXT: Arch: x86_64
// WINDOWS-NEXT: Arch: x86_64
Add a InitSections method to the streamer interface. The ELF implementation now creates text, data and bss to match the gnu as behavior. The text streamer still has the old MachO specific behavior since the testsuite checks that it will error when a directive is given before a setting the current section for example. A nice benefit is that -n is not required anymore when producing ELF files. llvm-svn: 114027
2010-09-16 05:48:40 +08:00
Don't create empty sections just to look like gas. We are long past the time when this much bug for bug compatibility was useful. llvm-svn: 251970
2015-11-04 04:02:22 +08:00
// Test that we create text by default. Also test that symtab and strtab are
// listed.
Add a InitSections method to the streamer interface. The ELF implementation now creates text, data and bss to match the gnu as behavior. The text streamer still has the old MachO specific behavior since the testsuite checks that it will error when a directive is given before a setting the current section for example. A nice benefit is that -n is not required anymore when producing ELF files. llvm-svn: 114027
2010-09-16 05:48:40 +08:00
Write the section header string table directly to the output stream. Instead of accumulating the content in a fragment first, just write it to the output stream. Also put it first in the section table, so that we never have to worry about its index being >= SHN_LORESERVE. llvm-svn: 236145
2015-04-30 04:25:24 +08:00
// CHECK: Section {
Produce a single string table in a ELF .o Normally an ELF .o has two string tables, one for symbols, one for section names. With the scheme of naming sections like ".text.foo" where foo is a symbol, there is a big potential saving in using a single one. Building llvm+clang+lld with master and with this patch the results were: master: 193,267,008 bytes patch: 186,107,952 bytes master non unique section names: 183,260,192 bytes patch non unique section names: 183,118,632 bytes So using non usique saves 10,006,816 bytes, and the patch saves 7,159,056 while still using distinct names for the sections. llvm-svn: 238073
2015-05-23 07:58:30 +08:00
// CHECK: Name: .strtab
Write the section header string table directly to the output stream. Instead of accumulating the content in a fragment first, just write it to the output stream. Also put it first in the section table, so that we never have to worry about its index being >= SHN_LORESERVE. llvm-svn: 236145
2015-04-30 04:25:24 +08:00
// CHECK-NEXT: Type: SHT_STRTAB
// CHECK-NEXT: Flags [
// CHECK-NEXT: ]
// CHECK-NEXT: Address: 0x0
// CHECK-NEXT: Offset:
Don't create empty sections just to look like gas. We are long past the time when this much bug for bug compatibility was useful. llvm-svn: 251970
2015-11-04 04:02:22 +08:00
// CHECK-NEXT: Size: 23
Write the section header string table directly to the output stream. Instead of accumulating the content in a fragment first, just write it to the output stream. Also put it first in the section table, so that we never have to worry about its index being >= SHN_LORESERVE. llvm-svn: 236145
2015-04-30 04:25:24 +08:00
// CHECK-NEXT: Link: 0
// CHECK-NEXT: Info: 0
// CHECK-NEXT: AddressAlignment: 1
// CHECK-NEXT: EntrySize: 0
// CHECK-NEXT: }
Replace coff-/elf-dump with llvm-readobj llvm-svn: 179361
2013-04-12 12:06:46 +08:00
// CHECK: Section {
// CHECK: Name: .text
// CHECK-NEXT: Type: SHT_PROGBITS
// CHECK-NEXT: Flags [
// CHECK-NEXT: SHF_ALLOC
// CHECK-NEXT: SHF_EXECINSTR
// CHECK-NEXT: ]
// CHECK-NEXT: Address: 0x0
// CHECK-NEXT: Offset: 0x40
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Link: 0
// CHECK-NEXT: Info: 0
// CHECK-NEXT: AddressAlignment: 4
// CHECK-NEXT: EntrySize: 0
// CHECK-NEXT: }
// CHECK: Section {
// CHECK: Name: .symtab
// CHECK-NEXT: Type: SHT_SYMTAB
// CHECK-NEXT: Flags [
// CHECK-NEXT: ]
// CHECK-NEXT: Address: 0x0
// CHECK-NEXT: Offset:
Omit unused section symbols from the symbol table. Section symbols exist as an optimization: instead of having multiple relocations point to different symbols, many of them can point to a single section symbol. When that optimization is unused, a section symbol is also unused and adds no extra information to the object file. This saves a bit of space on the object files and makes the output of llvm-objdump -t easier to read and consequently some tests get quite a bit simpler. llvm-svn: 239045
2015-06-04 23:33:30 +08:00
// CHECK-NEXT: Size: 24
Write the section header string table directly to the output stream. Instead of accumulating the content in a fragment first, just write it to the output stream. Also put it first in the section table, so that we never have to worry about its index being >= SHN_LORESERVE. llvm-svn: 236145
2015-04-30 04:25:24 +08:00
// CHECK-NEXT: Link:
Omit unused section symbols from the symbol table. Section symbols exist as an optimization: instead of having multiple relocations point to different symbols, many of them can point to a single section symbol. When that optimization is unused, a section symbol is also unused and adds no extra information to the object file. This saves a bit of space on the object files and makes the output of llvm-objdump -t easier to read and consequently some tests get quite a bit simpler. llvm-svn: 239045
2015-06-04 23:33:30 +08:00
// CHECK-NEXT: Info: 1
Replace coff-/elf-dump with llvm-readobj llvm-svn: 179361
2013-04-12 12:06:46 +08:00
// CHECK-NEXT: AddressAlignment: 8
// CHECK-NEXT: EntrySize: 24
// CHECK-NEXT: }