3rd-party/linux-kernel-module-cheat
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userland: add ported to all archs

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Ciro Santilli 六四事件 法轮功
2019-05-05 00:00:00 +00:00
parent 3388d72bb2
commit 42f8de774a
3 changed files with 16 additions and 5 deletions
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10
README.adoc
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@@ -11362,10 +11362,12 @@ This verifies that the venerable `add` instruction and our setup are working.
Then, modify that program to make the assertion fail: Then, modify that program to make the assertion fail:
.... ....
TODO ASSERT_EQ(%rax, $4)
.... ....
and then watch the assertion fail: because 1 + 2 tends to equal 3 instead of 4.
And then watch the assertion fail:
.... ....
./build-userland ./build-userland
@@ -11375,10 +11377,10 @@ and then watch the assertion fail:
with error message: with error message:
.... ....
TODO error 1 at line 8
.... ....
Notice how we give the actual assembly line number where the failing assert was! and notice how we give the actual assembly line number where the failing assert was!
Other setup sanity checks that you might want to look into include: Other setup sanity checks that you might want to look into include:

9
userland/arch/x86_64/add.S Normal file
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@@ -0,0 +1,9 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#userland-assembly */
#include "common.h"
ENTRY
mov $1, %rax
add $2, %rax
ASSERT_EQ(%rax, $3)
EXIT

2
userland/arch/x86_64/common_arch.h
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@@ -9,9 +9,9 @@
mov reg, %rax; \ mov reg, %rax; \
mov const, %rbx; \ mov const, %rbx; \
cmp %rax, %rbx; \ cmp %rax, %rbx; \
ASSERT(je); \
pop %rbx; \ pop %rbx; \
pop %rax; \ pop %rax; \
ASSERT(je); \
; ;
# TODO # TODO