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Last change
on this file since 479 was
444,
checked in by satin@…, 7 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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