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https://github.com/RPCS3/llvm-mirror.git
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fb13e8ff55
Summary: This fixes a dumpbin warning on objects produced by the MC assembler when starting from text. All .debug$S sections are supposed to be marked IMAGE_SCN_MEM_DISCARDABLE. The main, non-COMDAT .debug$S section had this set, but any comdat ones were not being marked discardable because there was no .section flag for it. This change does two things: - If the section name starts with .debug, implicitly mark the section as discardable. This means we do the same thing as gas on .s files with DWARF from GCC, which is important. - Adds the 'D' flag to the .section directive on COFF to explicitly say a section is discardable. We only emit this flag if the section name does not start with .debug. This allows the user to explicitly tweak their section flags without worrying about magic section names. The only thing you can't do in this scheme is to create a non-discardable section with a name starting with ".debug", but hopefully users don't need that. Reviewers: majnemer, rafael Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D24582 llvm-svn: 281554
195 lines
5.9 KiB
ArmAsm
195 lines
5.9 KiB
ArmAsm
// RUN: llvm-mc -triple i386-pc-win32 -filetype=obj %s | llvm-readobj -s | FileCheck %s
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// RUN: llvm-mc -triple x86_64-pc-win32 -filetype=obj %s | llvm-readobj -s | FileCheck %s
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.section .foo$bar; .long 1
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.section .foo@bar; .long 1
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.section ABCDEFGHIJKLMNOPQRSTUVWXYZ; .long 1
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.section abcdefghijklmnopqrstuvwxyz; .long 1
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.section _0123456789; .long 1
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// CHECK: Sections [
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// CHECK: Section {
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// CHECK: Name: .foo$bar
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: .foo@bar
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: ABCDEFGHIJKLMNOPQRSTUVWXYZ
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: abcdefghijklmnopqrstuvwxyz
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: _0123456789
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// CHECK: }
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// Test that the defaults are used
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.section s ; .long 1
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.section s_, "" ; .long 1
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.section s_a,"a"; .long 1
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.section s_b,"b"; .long 1
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.section s_d,"d"; .long 1
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.section s_D,"D"; .long 1
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.section s_n,"n"; .long 1
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.section s_r,"r"; .long 1
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.section s_s,"s"; .long 1
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.section s_w,"w"; .long 1
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.section s_x,"x"; .long 1
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.section s_y,"y"; .long 1
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// CHECK: Section {
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// CHECK: Name: s
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_a
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_b
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_UNINITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_d
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_D
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_MEM_DISCARDABLE
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_n
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_LNK_REMOVE
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_r
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_s
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_SHARED
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_w
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_x
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_CODE
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// CHECK-NEXT: IMAGE_SCN_MEM_EXECUTE
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: Section {
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// CHECK: Name: s_y
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: ]
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// CHECK: }
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// w makes read-only to readable
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.section s_rw,"rw"; .long 1
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// CHECK: Section {
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// CHECK: Name: s_rw
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: IMAGE_SCN_MEM_WRITE
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// CHECK-NEXT: ]
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// CHECK: }
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// r cancels w
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.section s_wr,"wr"; .long 1
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// CHECK: Section {
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// CHECK: Name: s_wr
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: ]
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// CHECK: }
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// y cancels both
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.section s_rwy,"rwy"; .long 1
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// CHECK: Section {
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// CHECK: Name: s_rwy
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: ]
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// CHECK: }
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// Sections starting with ".debug" are implicitly discardable. This is
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// compatible with gas.
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.section .debug_asdf,"dr"; .long 1
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// CHECK: Section {
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// CHECK: Name: .debug_asdf
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// CHECK: Characteristics [
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// CHECK-NEXT: IMAGE_SCN_ALIGN_1BYTES
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// CHECK-NEXT: IMAGE_SCN_CNT_INITIALIZED_DATA
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// CHECK-NEXT: IMAGE_SCN_MEM_DISCARDABLE
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// CHECK-NEXT: IMAGE_SCN_MEM_READ
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// CHECK-NEXT: ]
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// CHECK: }
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// CHECK: ]
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