[fusl] clang-format fusl

fusl/ldso/dlstart.c

 #include <stddef.h>
 #include "dynlink.h"
 
 #ifndef START
 #define START "_dlstart"
 #endif
 
 #include "crt_arch.h"
 
 #ifndef GETFUNCSYM
-#define GETFUNCSYM(fp, sym, got) do { \
-        __attribute__((__visibility__("hidden"))) void sym(); \
-        static void (*static_func_ptr)() = sym; \
-        __asm__ __volatile__ ( "" : "+m"(static_func_ptr) : : "memory"); \
-        *(fp) = static_func_ptr; } while(0)
+#define GETFUNCSYM(fp, sym, got)                                   \
+  do {                                                             \
+    __attribute__((__visibility__("hidden"))) void sym();          \
+    static void (*static_func_ptr)() = sym;                        \
+    __asm__ __volatile__("" : "+m"(static_func_ptr) : : "memory"); \
+    *(fp) = static_func_ptr;                                       \
+  } while (0)
 #endif
 
-__attribute__((__visibility__("hidden")))
-void _dlstart_c(size_t *sp, size_t *dynv)
-{
-        size_t i, aux[AUX_CNT], dyn[DYN_CNT];
-        size_t *rel, rel_size, base;
+__attribute__((__visibility__("hidden"))) void _dlstart_c(size_t* sp,
+                                                          size_t* dynv) {
+  size_t i, aux[AUX_CNT], dyn[DYN_CNT];
+  size_t *rel, rel_size, base;
 
-        int argc = *sp;
-        char **argv = (void *)(sp+1);
+  int argc = *sp;
+  char** argv = (void*)(sp + 1);
 
-        for (i=argc+1; argv[i]; i++);
-        size_t *auxv = (void *)(argv+i+1);
+  for (i = argc + 1; argv[i]; i++)
+    ;
+  size_t* auxv = (void*)(argv + i + 1);
 
-        for (i=0; i<AUX_CNT; i++) aux[i] = 0;
-        for (i=0; auxv[i]; i+=2) if (auxv[i]<AUX_CNT)
-                aux[auxv[i]] = auxv[i+1];
+  for (i = 0; i < AUX_CNT; i++)
+    aux[i] = 0;
+  for (i = 0; auxv[i]; i += 2)
+    if (auxv[i] < AUX_CNT)
+      aux[auxv[i]] = auxv[i + 1];
 
 #if DL_FDPIC
-        struct fdpic_loadseg *segs, fakeseg;
-        size_t j;
-        if (dynv) {
-                /* crt_arch.h entry point asm is responsible for reserving
-                 * space and moving the extra fdpic arguments to the stack
-                 * vector where they are easily accessible from C. */
-                segs = ((struct fdpic_loadmap *)(sp[-1] ? sp[-1] : sp[-2]))->segs;
-        } else {
-                /* If dynv is null, the entry point was started from loader
-                 * that is not fdpic-aware. We can assume normal fixed-
-                 * displacement ELF loading was performed, but when ldso was
-                 * run as a command, finding the Ehdr is a heursitic: we
-                 * have to assume Phdrs start in the first 4k of the file. */
-                base = aux[AT_BASE];
-                if (!base) base = aux[AT_PHDR] & -4096;
-                segs = &fakeseg;
-                segs[0].addr = base;
-                segs[0].p_vaddr = 0;
-                segs[0].p_memsz = -1;
-                Ehdr *eh = (void *)base;
-                Phdr *ph = (void *)(base + eh->e_phoff);
-                size_t phnum = eh->e_phnum;
-                size_t phent = eh->e_phentsize;
-                while (phnum-- && ph->p_type != PT_DYNAMIC)
-                        ph = (void *)((size_t)ph + phent);
-                dynv = (void *)(base + ph->p_vaddr);
-        }
+  struct fdpic_loadseg *segs, fakeseg;
+  size_t j;
+  if (dynv) {
+    /* crt_arch.h entry point asm is responsible for reserving
+     * space and moving the extra fdpic arguments to the stack
+     * vector where they are easily accessible from C. */
+    segs = ((struct fdpic_loadmap*)(sp[-1] ? sp[-1] : sp[-2]))->segs;
+  } else {
+    /* If dynv is null, the entry point was started from loader
+     * that is not fdpic-aware. We can assume normal fixed-
+     * displacement ELF loading was performed, but when ldso was
+     * run as a command, finding the Ehdr is a heursitic: we
+     * have to assume Phdrs start in the first 4k of the file. */
+    base = aux[AT_BASE];
+    if (!base)
+      base = aux[AT_PHDR] & -4096;
+    segs = &fakeseg;
+    segs[0].addr = base;
+    segs[0].p_vaddr = 0;
+    segs[0].p_memsz = -1;
+    Ehdr* eh = (void*)base;
+    Phdr* ph = (void*)(base + eh->e_phoff);
+    size_t phnum = eh->e_phnum;
+    size_t phent = eh->e_phentsize;
+    while (phnum-- && ph->p_type != PT_DYNAMIC)
+      ph = (void*)((size_t)ph + phent);
+    dynv = (void*)(base + ph->p_vaddr);
+  }
 #endif
 
-        for (i=0; i<DYN_CNT; i++) dyn[i] = 0;
-        for (i=0; dynv[i]; i+=2) if (dynv[i]<DYN_CNT)
-                dyn[dynv[i]] = dynv[i+1];
+  for (i = 0; i < DYN_CNT; i++)
+    dyn[i] = 0;
+  for (i = 0; dynv[i]; i += 2)
+    if (dynv[i] < DYN_CNT)
+      dyn[dynv[i]] = dynv[i + 1];
 
 #if DL_FDPIC
-        for (i=0; i<DYN_CNT; i++) {
-                if (i==DT_RELASZ || i==DT_RELSZ) continue;
-                if (!dyn[i]) continue;
-                for (j=0; dyn[i]-segs[j].p_vaddr >= segs[j].p_memsz; j++);
-                dyn[i] += segs[j].addr - segs[j].p_vaddr;
-        }
-        base = 0;
+  for (i = 0; i < DYN_CNT; i++) {
+    if (i == DT_RELASZ || i == DT_RELSZ)
+      continue;
+    if (!dyn[i])
+      continue;
+    for (j = 0; dyn[i] - segs[j].p_vaddr >= segs[j].p_memsz; j++)
+      ;
+    dyn[i] += segs[j].addr - segs[j].p_vaddr;
+  }
+  base = 0;
 
-        const Sym *syms = (void *)dyn[DT_SYMTAB];
+  const Sym* syms = (void*)dyn[DT_SYMTAB];
 
-        rel = (void *)dyn[DT_RELA];
-        rel_size = dyn[DT_RELASZ];
-        for (; rel_size; rel+=3, rel_size-=3*sizeof(size_t)) {
-                if (!IS_RELATIVE(rel[1], syms)) continue;
-                for (j=0; rel[0]-segs[j].p_vaddr >= segs[j].p_memsz; j++);
-                size_t *rel_addr = (void *)
-                        (rel[0] + segs[j].addr - segs[j].p_vaddr);
-                if (R_TYPE(rel[1]) == REL_FUNCDESC_VAL) {
-                        *rel_addr += segs[rel_addr[1]].addr
-                                - segs[rel_addr[1]].p_vaddr
-                                + syms[R_SYM(rel[1])].st_value;
-                        rel_addr[1] = dyn[DT_PLTGOT];
-                } else {
-                        size_t val = syms[R_SYM(rel[1])].st_value;
-                        for (j=0; val-segs[j].p_vaddr >= segs[j].p_memsz; j++);
-                        *rel_addr = rel[2] + segs[j].addr - segs[j].p_vaddr + val;
-                }
-        }
+  rel = (void*)dyn[DT_RELA];
+  rel_size = dyn[DT_RELASZ];
+  for (; rel_size; rel += 3, rel_size -= 3 * sizeof(size_t)) {
+    if (!IS_RELATIVE(rel[1], syms))
+      continue;
+    for (j = 0; rel[0] - segs[j].p_vaddr >= segs[j].p_memsz; j++)
+      ;
+    size_t* rel_addr = (void*)(rel[0] + segs[j].addr - segs[j].p_vaddr);
+    if (R_TYPE(rel[1]) == REL_FUNCDESC_VAL) {
+      *rel_addr += segs[rel_addr[1]].addr - segs[rel_addr[1]].p_vaddr +
+                   syms[R_SYM(rel[1])].st_value;
+      rel_addr[1] = dyn[DT_PLTGOT];
+    } else {
+      size_t val = syms[R_SYM(rel[1])].st_value;
+      for (j = 0; val - segs[j].p_vaddr >= segs[j].p_memsz; j++)
+        ;
+      *rel_addr = rel[2] + segs[j].addr - segs[j].p_vaddr + val;
+    }
+  }
 #else
-        /* If the dynamic linker is invoked as a command, its load
-         * address is not available in the aux vector. Instead, compute
-         * the load address as the difference between &_DYNAMIC and the
-         * virtual address in the PT_DYNAMIC program header. */
-        base = aux[AT_BASE];
-        if (!base) {
-                size_t phnum = aux[AT_PHNUM];
-                size_t phentsize = aux[AT_PHENT];
-                Phdr *ph = (void *)aux[AT_PHDR];
-                for (i=phnum; i--; ph = (void *)((char *)ph + phentsize)) {
-                        if (ph->p_type == PT_DYNAMIC) {
-                                base = (size_t)dynv - ph->p_vaddr;
-                                break;
-                        }
-                }
-        }
+  /* If the dynamic linker is invoked as a command, its load
+   * address is not available in the aux vector. Instead, compute
+   * the load address as the difference between &_DYNAMIC and the
+   * virtual address in the PT_DYNAMIC program header. */
+  base = aux[AT_BASE];
+  if (!base) {
+    size_t phnum = aux[AT_PHNUM];
+    size_t phentsize = aux[AT_PHENT];
+    Phdr* ph = (void*)aux[AT_PHDR];
+    for (i = phnum; i--; ph = (void*)((char*)ph + phentsize)) {
+      if (ph->p_type == PT_DYNAMIC) {
+        base = (size_t)dynv - ph->p_vaddr;
+        break;
+      }
+    }
+  }
 
-        /* MIPS uses an ugly packed form for GOT relocations. Since we
-         * can't make function calls yet and the code is tiny anyway,
-         * it's simply inlined here. */
-        if (NEED_MIPS_GOT_RELOCS) {
-                size_t local_cnt = 0;
-                size_t *got = (void *)(base + dyn[DT_PLTGOT]);
-                for (i=0; dynv[i]; i+=2) if (dynv[i]==DT_MIPS_LOCAL_GOTNO)
-                        local_cnt = dynv[i+1];
-                for (i=0; i<local_cnt; i++) got[i] += base;
-        }
+  /* MIPS uses an ugly packed form for GOT relocations. Since we
+   * can't make function calls yet and the code is tiny anyway,
+   * it's simply inlined here. */
+  if (NEED_MIPS_GOT_RELOCS) {
+    size_t local_cnt = 0;
+    size_t* got = (void*)(base + dyn[DT_PLTGOT]);
+    for (i = 0; dynv[i]; i += 2)
+      if (dynv[i] == DT_MIPS_LOCAL_GOTNO)
+        local_cnt = dynv[i + 1];
+    for (i = 0; i < local_cnt; i++)
+      got[i] += base;
+  }
 
-        rel = (void *)(base+dyn[DT_REL]);
-        rel_size = dyn[DT_RELSZ];
-        for (; rel_size; rel+=2, rel_size-=2*sizeof(size_t)) {
-                if (!IS_RELATIVE(rel[1], 0)) continue;
-                size_t *rel_addr = (void *)(base + rel[0]);
-                *rel_addr += base;
-        }
+  rel = (void*)(base + dyn[DT_REL]);
+  rel_size = dyn[DT_RELSZ];
+  for (; rel_size; rel += 2, rel_size -= 2 * sizeof(size_t)) {
+    if (!IS_RELATIVE(rel[1], 0))
+      continue;
+    size_t* rel_addr = (void*)(base + rel[0]);
+    *rel_addr += base;
+  }
 
-        rel = (void *)(base+dyn[DT_RELA]);
-        rel_size = dyn[DT_RELASZ];
-        for (; rel_size; rel+=3, rel_size-=3*sizeof(size_t)) {
-                if (!IS_RELATIVE(rel[1], 0)) continue;
-                size_t *rel_addr = (void *)(base + rel[0]);
-                *rel_addr = base + rel[2];
-        }
+  rel = (void*)(base + dyn[DT_RELA]);
+  rel_size = dyn[DT_RELASZ];
+  for (; rel_size; rel += 3, rel_size -= 3 * sizeof(size_t)) {
+    if (!IS_RELATIVE(rel[1], 0))
+      continue;
+    size_t* rel_addr = (void*)(base + rel[0]);
+    *rel_addr = base + rel[2];
+  }
 #endif
 
-        stage2_func dls2;
-        GETFUNCSYM(&dls2, __dls2, base+dyn[DT_PLTGOT]);
-        dls2((void *)base, sp);
+  stage2_func dls2;
+  GETFUNCSYM(&dls2, __dls2, base + dyn[DT_PLTGOT]);
+  dls2((void*)base, sp);
 }