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Fix incorrect instructions names in ARM32 scanners #124

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merged 2 commits into from
May 31, 2024
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@IgWod IgWod commented May 29, 2024

For unknown reasons some of the NEON instructions has been updated in the PIE arm and thumb definitions without reflecting those changes in the aarch32 scanners. As a result MAMBO does not compile for 32-bit architectures. This commit adjusts the names in the scanner to match definitions in PIE.

@IgWod IgWod added the aarch32 label May 29, 2024
@IgWod IgWod requested a review from jkressel May 29, 2024 17:13
@IgWod IgWod self-assigned this May 29, 2024
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IgWod commented May 30, 2024

Closing and re-opening to trigger the CI.

@IgWod IgWod closed this May 30, 2024
@IgWod IgWod reopened this May 30, 2024
For unknown reasons some of the NEON instructions has been updated
in the PIE arm and thumb definitions without reflecting those
changes in the aarch32 scanners. As a result MAMBO does not compile
for 32-bit architectures. This commit adjusts the names in the
scanner to match defintions in PIE.wq
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IgWod commented May 31, 2024

This PR also fixes problem with mapping of reserved space on A32.

For unknown reasons when RESERVED_BRK_SPACE is set to 128 * PAGE_SIZE
MABMO segfaults on scanning the first instructions. The problem
first transpires after mmap and remmap involving RESERVED_BRK_SPACE
is executed. This fix reduces the reserved space back to PAGE_SIZE
for A32 - the value used before RISC-V merge. One of the possible
explnations is smaller virtual memory on A32 compared to A64 and RISC-V.
@jkressel jkressel merged commit a764862 into master May 31, 2024
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@IgWod IgWod deleted the aarch32-fix-neon branch May 31, 2024 13:34
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2 participants