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7afe0000f6
When a label is parsed, check if there is type information available for the label. If so, check if the symbol is a function. If the symbol is a function and we are in thumb mode and no explicit thumb_func has been emitted, adjust the symbol data to indicate that the function definition is a thumb function. The application of this inferencing is improved value handling in the object file (the required thumb bit is set on symbols which are thumb functions). It also helps improve compatibility with binutils. The one complication that arises from this handling is the MCAsmStreamer. The default implementation of getOrCreateSymbolData in MCStreamer does not support tracking the symbol data. In order to support the semantics of thumb functions, track symbol data in assembly streamer. Although O(n) in number of labels in the TU, this is already done in various other streamers and as such the memory overhead is not a practical concern in this scenario. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204544 91177308-0d34-0410-b5e6-96231b3b80d8
140 lines
2.2 KiB
ArmAsm
140 lines
2.2 KiB
ArmAsm
@ RUN: llvm-mc -triple armv7-eabi -filetype obj -o - %s | llvm-readobj -t \
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@ RUN: | FileCheck %s
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.syntax unified
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.arm
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.type arm_func,%function
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arm_func:
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nop
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.thumb_set alias_arm_func, arm_func
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.thumb
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.type thumb_func,%function
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.thumb_func
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thumb_func:
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nop
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.thumb_set alias_thumb_func, thumb_func
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.thumb_set seedless, 0x5eed1e55
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.thumb_set eggsalad, seedless + 0x87788358
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.thumb_set faceless, ~eggsalad + 0xe133c002
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.thumb_set alias_undefined_data, badblood
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.data
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.type badblood,%object
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badblood:
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.long 0xbadb100d
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.type bedazzle,%object
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bedazzle:
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.long 0xbeda221e
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.text
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.thumb
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.thumb_set alias_defined_data, bedazzle
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.type alpha,%function
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alpha:
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nop
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.type beta,%function
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beta:
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bkpt
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.thumb_set beta, alpha
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.thumb_set alias_undefined, undefined
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@ CHECK: Symbol {
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@ CHECK: Name: alias_arm_func
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@ CHECK: Value: 0x1
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: alias_defined_data
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@ CHECK: Value: 0x5
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: alias_thumb_func
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@ CHECK: Value: 0x5
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: alias_undefined_data
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@ CHECK: Value: 0x0
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@ CHECK: Type: Object
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: alpha
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@ CHECK: Value: 0x7
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: arm_func
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@ CHECK: Value: 0x0
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: bedazzle
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@ CHECK: Value: 0x4
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@ CHECK: Type: Object
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: beta
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@ CHECK: Value: 0x7
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: eggsalad
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@ CHECK: Value: 0xE665A1AD
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: faceless
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@ CHECK: Value: 0xFACE1E55
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: seedless
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@ CHECK: Value: 0x5EED1E55
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: thumb_func
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@ CHECK: Value: 0x5
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@ CHECK: Type: Function
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: badblood
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@ CHECK: Value: 0x0
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@ CHECK: Type: Object
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: undefined
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@ CHECK: Value: 0x0
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@ CHECK: Type: None
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@ CHECK: }
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