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gem5: port lkmc/m5ops.h to x86

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We can now easily include x86 m5ops on our gem5 examples.
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2019-06-24 00:00:01 +00:00
parent 9fd9cb520e
commit d37344ac11
2 changed files with 24 additions and 2 deletions
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3
README.adoc
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@@ -10916,8 +10916,9 @@ To use that file, first rebuild `m5ops.out` with the m5ops instructions enabled
./build-userland \
--arch aarch64 \
--ccflags='-DLKMC_M5OPS_ENABLE=1' \
--force-rebuild c/m5ops \
--force-rebuild \
--static \
userland/c/m5ops.c \
;
./build-buildroot --arch aarch64
....

23
lkmc/m5ops.h
View File

@@ -5,7 +5,28 @@
#if LKMC_M5OPS_ENABLE
#if defined(__arm__)
#if defined(__x86_64__)
/* 0x43 is the identifier for CHECKPOINT on all archs.
*
* 0x040F is the magic x86 undefined instruction boilerplate to which the identifier gets added.
*
* D means RDI which is the first argument of a Linux C function call,
* and S means RSI is the second one: these are also used by gem5 as arguments of the m5ops.
*/
#define LKMC_M5OPS_CHECKPOINT_ASM mov $0, %%rdi; mov $0, %%rsi; .word 0x040F; .word 0x0043
#define LKMC_M5OPS_DUMPSTATS_ASM mov $0, %%rdi; mov $0, %%rsi; .word 0x040F; .word 0x0041
#define LKMC_M5OPS_EXIT_ASM mov $0, %%rdi; .word 0x040F; .word 0x0021
#define LKMC_M5OPS_FAIL_1_ASM mov $0, %%rdi; mov $1, %%rsi; .word 0x040F; .word 0x0022
#define LKMC_M5OPS_RESETSTATS_ASM mov $0, %%rdi; mov $0, %%rsi; .word 0x040F; .word 0x0040
#define LKMC_M5OPS_CHECKPOINT __asm__ __volatile__ (".word 0x040F; .word 0x0043;" : : "D" (0), "S" (0) :)
#define LKMC_M5OPS_DUMPSTATS __asm__ __volatile__ (".word 0x040F; .word 0x0041;" : : "D" (0), "S" (0) :)
#define LKMC_M5OPS_EXIT __asm__ __volatile__ (".word 0x040F; .word 0x0021;" : : "D" (0) :)
#define LKMC_M5OPS_FAIL_1 __asm__ __volatile__ (".word 0x040F; .word 0x0022;" : : "D" (0), "S" (1) :)
#define LKMC_M5OPS_RESETSTATS __asm__ __volatile__ (".word 0x040F; .word 0x0040;" : : "D" (0), "S" (0) :)
#elif defined(__arm__)
#define LKMC_M5OPS_CHECKPOINT_ASM mov r0, #0; mov r1, #0; mov r2, #0; mov r3, #0; .inst 0xEE000110 | (0x43 << 16)
#define LKMC_M5OPS_DUMPSTATS_ASM mov r0, #0; mov r1, #0; mov r2, #0; mov r3, #0; .inst 0xEE000110 | (0x41 << 16)