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x86 asm: align stack to 16-bits for abort() call

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Fixes the failing tests that called abort(). For coincidence, only native
tests were failing.

Asked at: https://stackoverflow.com/questions/56324948/why-does-calling-the-c-abort-function-from-an-x86-64-assembly-function-lead-to
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Ciro Santilli 六四事件 法轮功
2019-05-27 00:00:03 +00:00
parent 48079d0843
commit 6e790042f0
2 changed files with 5 additions and 1 deletions
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README.adoc
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@@ -11998,6 +11998,8 @@ Examples:
* link:lkmc/x86_64.h[] `ENTRY` and `EXIT`
One important catch is that the stack must always be aligned to 16-bits before making calls: https://stackoverflow.com/questions/56324948/why-does-calling-the-c-abort-function-from-an-x86-64-assembly-function-lead-to
Bibliography:
* https://en.wikipedia.org/wiki/X86_calling_conventions#System_V_AMD64_ABI
@@ -13434,7 +13436,7 @@ output:
....
CPSR.M 0x3
CPSR.M 0x3
CPSR.M 0xA
CPSR.M 0x3
CurrentEL.EL 0x1
CurrentEL.EL 0x2