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linux-user: Split out mmap_end

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Use a subroutine instead of a goto within target_mmap__locked.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-20-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-01-02 12:57:54 +11:00
parent f0a362c476
commit 6ecc25570f
1 changed files with 41 additions and 30 deletions
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71
linux-user/mmap.c
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@ -490,6 +490,43 @@ abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size, abi_ulong align)
} }
} }
/*
* Record a successful mmap within the user-exec interval tree.
*/
static abi_long mmap_end(abi_ulong start, abi_ulong last,
abi_ulong passthrough_start,
abi_ulong passthrough_last,
int flags, int page_flags)
{
if (flags & MAP_ANONYMOUS) {
page_flags |= PAGE_ANON;
}
page_flags |= PAGE_RESET;
if (passthrough_start > passthrough_last) {
page_set_flags(start, last, page_flags);
} else {
if (start < passthrough_start) {
page_set_flags(start, passthrough_start - 1, page_flags);
}
page_set_flags(passthrough_start, passthrough_last,
page_flags | PAGE_PASSTHROUGH);
if (passthrough_last < last) {
page_set_flags(passthrough_last + 1, last, page_flags);
}
}
shm_region_rm_complete(start, last);
trace_target_mmap_complete(start);
if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
FILE *f = qemu_log_trylock();
if (f) {
fprintf(f, "page layout changed following mmap\n");
page_dump(f);
qemu_log_unlock(f);
}
}
return start;
}
static abi_long target_mmap__locked(abi_ulong start, abi_ulong len, static abi_long target_mmap__locked(abi_ulong start, abi_ulong len,
int target_prot, int flags, int page_flags, int target_prot, int flags, int page_flags,
int fd, off_t offset) int fd, off_t offset)
@ -632,7 +669,7 @@ static abi_long target_mmap__locked(abi_ulong start, abi_ulong len,
ret = target_mprotect(start, len, target_prot); ret = target_mprotect(start, len, target_prot);
assert(ret == 0); assert(ret == 0);
} }
goto the_end; return mmap_end(start, last, -1, 0, flags, page_flags);
} }
/* handle the start of the mapping */ /* handle the start of the mapping */
@ -643,7 +680,7 @@ static abi_long target_mmap__locked(abi_ulong start, abi_ulong len,
target_prot, flags, fd, offset)) { target_prot, flags, fd, offset)) {
return -1; return -1;
} }
goto the_end; return mmap_end(start, last, -1, 0, flags, page_flags);
} }
if (!mmap_frag(real_start, start, if (!mmap_frag(real_start, start,
real_start + host_page_size - 1, real_start + host_page_size - 1,
@ -690,34 +727,8 @@ static abi_long target_mmap__locked(abi_ulong start, abi_ulong len,
passthrough_last = real_last; passthrough_last = real_last;
} }
} }
the_end: return mmap_end(start, last, passthrough_start, passthrough_last,
if (flags & MAP_ANONYMOUS) { flags, page_flags);
page_flags |= PAGE_ANON;
}
page_flags |= PAGE_RESET;
if (passthrough_start > passthrough_last) {
page_set_flags(start, last, page_flags);
} else {
if (start < passthrough_start) {
page_set_flags(start, passthrough_start - 1, page_flags);
}
page_set_flags(passthrough_start, passthrough_last,
page_flags | PAGE_PASSTHROUGH);
if (passthrough_last < last) {
page_set_flags(passthrough_last + 1, last, page_flags);
}
}
shm_region_rm_complete(start, last);
trace_target_mmap_complete(start);
if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
FILE *f = qemu_log_trylock();
if (f) {
fprintf(f, "page layout changed following mmap\n");
page_dump(f);
qemu_log_unlock(f);
}
}
return start;
} }
/* NOTE: all the constants are the HOST ones */ /* NOTE: all the constants are the HOST ones */