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c6b11bb4ce
Summary:
In the assembler or inline assembler,
attempting to use an invalid fixup type
gives a crash with a segmentation fault.
__attribute__((naked))
void foo(void) {
__asm__("mov r9, :lower16:bar(prel31)");
}
This should give a proper error message when building for ARM or Thumb.
This brings it in line with AARCH64.
This fixes all 8 instances of llvm_unreachable("Unsupported Modifier");
in ARM/MCTargetDesc/ARMELFObjectWriter.cpp.
A test is provided for each instance.
Reviewers: llvm-commits, MarkMurrayARM
Reviewed By: MarkMurrayARM
Subscribers: kristof.beyls, hiraditya, danielkiss
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D79782
Change-Id: I6971ba37f129cc453568fe71514ccb2ac9d16831
52 lines
1.5 KiB
ArmAsm
52 lines
1.5 KiB
ArmAsm
@ RUN: not llvm-mc -triple armv7a--none-eabi -filetype obj < %s -o /dev/null 2>&1 | FileCheck %s
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@ RUN: not llvm-mc -triple thumbv7a--none-eabi -filetype obj < %s -o /dev/null 2>&1 | FileCheck %s
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@ Note: These errors are not always emitted in the order in which the relevant
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@ source appears, this file is carefully ordered so that that is the case.
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.text
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: symbol 'undef' can not be undefined in a subtraction expression
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.word (0-undef)
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: expected relocatable expression
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.word -undef
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: symbol 'undef' can not be undefined in a subtraction expression
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adr r0, #a-undef
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: Cannot represent a difference across sections
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.word x_a - y_a
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: invalid fixup for {{ARM|Thumb}} MOVT instruction
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movt r9, :upper16: bar(PREL31)
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: invalid fixup for {{ARM|Thumb}} MOVW instruction
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movw r9, :lower16: bar(PREL31)
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: invalid fixup for 1-byte data relocation
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.byte f30(PLT)
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: invalid fixup for 2-byte data relocation
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.hword f30(PLT)
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: invalid fixup for 4-byte data relocation
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.word f30(PLT)
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@ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: invalid fixup for 4-byte pc-relative data relocation
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.word x_a(PLT) - label1
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label1:
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w:
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.word 0
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.weak w
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.section sec_x
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x_a:
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.word 0
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.section sec_y
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y_a:
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.word 0
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