Last change
on this file since 513 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.2 KB
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Line | |
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1 | ! sbrk() system call |
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2 | |
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3 | #include "syscallasm.h" |
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4 | |
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5 | TEXT_SECTION |
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6 | ALIGN (4) |
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7 | #ifdef REENT |
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8 | GLOBAL (ASM_SYMBOL (_sbrk_r)) |
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9 | ASM_SYMBOL (_sbrk_r): |
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10 | mov %o0,%o5 |
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11 | mov %o1,%o0 |
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12 | #else |
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13 | GLOBAL (ASM_SYMBOL (sbrk)) |
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14 | ASM_SYMBOL (sbrk): |
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15 | #endif |
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16 | add %o0,7,%o0 |
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17 | andn %o0,7,%o0 |
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18 | sethi %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o2 |
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19 | #ifdef __sparc_v9__ |
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20 | lduw [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3 |
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21 | #else |
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22 | ld [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3 |
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23 | #endif |
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24 | add %o3,7,%o3 |
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25 | andn %o3,7,%o3 |
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26 | add %o3,%o0,%o0 |
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27 | mov %o0,%o4 |
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28 | mov SYS_brk,%g1 |
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29 | ta SYSCALL_TRAP |
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30 | bcs err |
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31 | nop |
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32 | st %o4,[%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))] |
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33 | jmpl %o7+8,%g0 |
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34 | mov %o3,%o0 |
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35 | |
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36 | #ifdef REENT |
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37 | GLOBAL (ASM_SYMBOL (_brk_r)) |
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38 | ASM_SYMBOL (_brk_r): |
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39 | mov %o0,%o5 |
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40 | mov %o1,%o0 |
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41 | #else |
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42 | GLOBAL (ASM_SYMBOL (brk)) |
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43 | ASM_SYMBOL (brk): |
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44 | #endif |
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45 | add %o0,7,%o0 |
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46 | andn %o0,7,%o0 |
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47 | mov %o0,%o2 |
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48 | mov SYS_brk,%g1 |
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49 | ta SYSCALL_TRAP |
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50 | bcs err |
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51 | nop |
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52 | sethi %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o3 |
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53 | st %o2,[%o3+%lo (ASM_PRIVATE_SYMBOL (curbrk))] |
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54 | retl |
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55 | mov %g0,%o0 |
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56 | |
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57 | err: |
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58 | #ifdef REENT |
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59 | sethi %hi (ASM_PRIVATE_SYMBOL (cerror_r)),%g1 |
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60 | or %g1,%lo (ASM_PRIVATE_SYMBOL (cerror_r)),%g1 |
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61 | #else |
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62 | sethi %hi (ASM_PRIVATE_SYMBOL (cerror)),%g1 |
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63 | or %g1,%lo (ASM_PRIVATE_SYMBOL (cerror)),%g1 |
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64 | #endif |
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65 | jmpl %g1,%g0 |
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66 | mov %o5,%o1 |
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