uaccess.S (ab1c247094e323177a578b38f0325bf79f0317ac) uaccess.S (c2a658d419246108c9bf065ec347355de5ba8a05)
1#include <linux/linkage.h>
2#include <asm-generic/export.h>
3#include <asm/asm.h>
4#include <asm/asm-extable.h>
5#include <asm/csr.h>
1#include <linux/linkage.h>
2#include <asm-generic/export.h>
3#include <asm/asm.h>
4#include <asm/asm-extable.h>
5#include <asm/csr.h>
6#include <asm/hwcap.h>
7#include <asm/alternative-macros.h>
6
7 .macro fixup op reg addr lbl
8100:
9 \op \reg, \addr
10 _asm_extable 100b, \lbl
11 .endm
12
13SYM_FUNC_START(__asm_copy_to_user)
8
9 .macro fixup op reg addr lbl
10100:
11 \op \reg, \addr
12 _asm_extable 100b, \lbl
13 .endm
14
15SYM_FUNC_START(__asm_copy_to_user)
16#ifdef CONFIG_RISCV_ISA_V
17 ALTERNATIVE("j fallback_scalar_usercopy", "nop", 0, RISCV_ISA_EXT_v, CONFIG_RISCV_ISA_V)
18 REG_L t0, riscv_v_usercopy_threshold
19 bltu a2, t0, fallback_scalar_usercopy
20 tail enter_vector_usercopy
21#endif
22SYM_FUNC_START(fallback_scalar_usercopy)
14
15 /* Enable access to user memory */
16 li t6, SR_SUM
17 csrs CSR_STATUS, t6
18
19 /*
20 * Save the terminal address which will be used to compute the number
21 * of bytes copied in case of a fixup exception.

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176
177 /* Exception fixup code */
17810:
179 /* Disable access to user memory */
180 csrc CSR_STATUS, t6
181 sub a0, t5, a0
182 ret
183SYM_FUNC_END(__asm_copy_to_user)
23
24 /* Enable access to user memory */
25 li t6, SR_SUM
26 csrs CSR_STATUS, t6
27
28 /*
29 * Save the terminal address which will be used to compute the number
30 * of bytes copied in case of a fixup exception.

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185
186 /* Exception fixup code */
18710:
188 /* Disable access to user memory */
189 csrc CSR_STATUS, t6
190 sub a0, t5, a0
191 ret
192SYM_FUNC_END(__asm_copy_to_user)
193SYM_FUNC_END(fallback_scalar_usercopy)
184EXPORT_SYMBOL(__asm_copy_to_user)
185SYM_FUNC_ALIAS(__asm_copy_from_user, __asm_copy_to_user)
186EXPORT_SYMBOL(__asm_copy_from_user)
187
188
189SYM_FUNC_START(__clear_user)
190
191 /* Enable access to user memory */

--- 45 unchanged lines hidden --- 		194EXPORT_SYMBOL(__asm_copy_to_user)
195SYM_FUNC_ALIAS(__asm_copy_from_user, __asm_copy_to_user)
196EXPORT_SYMBOL(__asm_copy_from_user)
197
198
199SYM_FUNC_START(__clear_user)
200
201 /* Enable access to user memory */

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