mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-27 04:01:36 +01:00
f176d04500
aarch64 basically done, but missing: - other archs - maybe convert main.c into C++ to use templates? - full review of ASSERT_EQ calling convention issues not seen by tests by chance - documentation
84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#userland-assembly-c-standard-library */
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#ifndef COMMON_ARCH_H
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#define COMMON_ARCH_H
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#define ASSERT_EQ(reg, const) \
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mov x0, reg; \
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ldr x1, =const; \
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ASSERT_EQ_DO(64); \
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;
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#define ASSERT_EQ_DO(bits) \
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bl assert_eq_ ## bits; \
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cmp x0, 0; \
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ASSERT(beq); \
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;
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#define ASSERT_EQ_REG(reg1, reg2) \
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str reg2, [sp, -8]!; \
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mov x0, reg1; \
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ldr x1, [sp], 8; \
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ASSERT_EQ_DO(64); \
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;
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#define ASSERT_EQ_REG_32(reg1, reg2) \
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str reg2, [sp, -4]!; \
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mov w0, reg1; \
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ldr w1, [sp], 4; \
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ASSERT_EQ_DO(32); \
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;
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#define ASSERT_MEMCMP(label1, label2, const_size) \
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adr x0, label1; \
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adr x1, label2; \
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ldr x2, =const_size; \
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bl assert_memcmp; \
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cmp x0, 0; \
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ASSERT(beq); \
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;
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#define ENTRY \
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.text; \
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.global asm_main; \
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asm_main: \
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sub sp, sp, 0xA0; \
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stp x29, x30, [sp]; \
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stp x27, x28, [sp, 0x10]; \
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stp x25, x26, [sp, 0x20]; \
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stp x23, x24, [sp, 0x30]; \
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stp x21, x22, [sp, 0x40]; \
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stp x19, x20, [sp, 0x50]; \
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stp x6, x7, [sp, 0x60]; \
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stp x4, x5, [sp, 0x70]; \
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stp x2, x3, [sp, 0x80]; \
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stp x0, x1, [sp, 0x90]; \
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asm_main_after_prologue: \
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;
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#define EXIT \
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mov w0, 0; \
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mov w1, 0; \
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b pass; \
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fail: \
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ldr x1, [sp, 0x90]; \
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str w0, [x1]; \
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mov w0, 1; \
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pass: \
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ldp x19, x20, [sp, 0x50]; \
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ldp x21, x22, [sp, 0x40]; \
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ldp x23, x24, [sp, 0x30]; \
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ldp x25, x26, [sp, 0x20]; \
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ldp x27, x28, [sp, 0x10]; \
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ldp x29, x30, [sp]; \
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add sp, sp, 0xA0; \
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ret; \
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;
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#define FAIL \
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ldr w0, =__LINE__; \
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b fail; \
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;
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#endif
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